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Theorem maducoeval2 20446
Description: An entry of the adjunct (cofactor) matrix. (Contributed by SO, 17-Jul-2018.)
Hypotheses
Ref Expression
madufval.a  |-  A  =  ( N Mat  R )
madufval.d  |-  D  =  ( N maDet  R )
madufval.j  |-  J  =  ( N maAdju  R )
madufval.b  |-  B  =  ( Base `  A
)
madufval.o  |-  .1.  =  ( 1r `  R )
madufval.z  |-  .0.  =  ( 0g `  R )
Assertion
Ref Expression
maducoeval2  |-  ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N
)  ->  ( I
( J `  M
) H )  =  ( D `  (
k  e.  N , 
l  e.  N  |->  if ( ( k  =  H  \/  l  =  I ) ,  if ( ( l  =  I  /\  k  =  H ) ,  .1.  ,  .0.  ) ,  ( k M l ) ) ) ) )
Distinct variable groups:    k, N, l    R, k, l    k, M, l    k, I, l   
k, H, l    B, k, l    .0. , k    .1. , k
Allowed substitution hints:    A( k, l)    D( k, l)    .1. ( l)    J( k, l)    .0. ( l)

Proof of Theorem maducoeval2
Dummy variables  n  r  m are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eleq2 2690 . . . . . . . 8  |-  ( m  =  (/)  ->  ( k  e.  m  <->  k  e.  (/) ) )
21ifbid 4108 . . . . . . 7  |-  ( m  =  (/)  ->  if ( k  e.  m ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) )  =  if ( k  e.  (/) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )
32ifeq2d 4105 . . . . . 6  |-  ( m  =  (/)  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  m ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )  =  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  (/) ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )
43mpt2eq3dv 6721 . . . . 5  |-  ( m  =  (/)  ->  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  m ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )  =  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  (/) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) )
54fveq2d 6195 . . . 4  |-  ( m  =  (/)  ->  ( D `
 ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  m ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) )  =  ( D `  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  (/) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) ) )
65eqeq2d 2632 . . 3  |-  ( m  =  (/)  ->  ( ( I ( J `  M ) H )  =  ( D `  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  m ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) )  <->  ( I
( J `  M
) H )  =  ( D `  (
k  e.  N , 
l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  (/) ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) ) ) )
7 eleq2 2690 . . . . . . . 8  |-  ( m  =  n  ->  (
k  e.  m  <->  k  e.  n ) )
87ifbid 4108 . . . . . . 7  |-  ( m  =  n  ->  if ( k  e.  m ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) )  =  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )
98ifeq2d 4105 . . . . . 6  |-  ( m  =  n  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  m ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )  =  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )
109mpt2eq3dv 6721 . . . . 5  |-  ( m  =  n  ->  (
k  e.  N , 
l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  m ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )  =  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) )
1110fveq2d 6195 . . . 4  |-  ( m  =  n  ->  ( D `  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  m ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) )  =  ( D `  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) ) )
1211eqeq2d 2632 . . 3  |-  ( m  =  n  ->  (
( I ( J `
 M ) H )  =  ( D `
 ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  m ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) )  <-> 
( I ( J `
 M ) H )  =  ( D `
 ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) ) ) )
13 eleq2 2690 . . . . . . . 8  |-  ( m  =  ( n  u. 
{ r } )  ->  ( k  e.  m  <->  k  e.  ( n  u.  { r } ) ) )
1413ifbid 4108 . . . . . . 7  |-  ( m  =  ( n  u. 
{ r } )  ->  if ( k  e.  m ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) )  =  if ( k  e.  ( n  u. 
{ r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )
1514ifeq2d 4105 . . . . . 6  |-  ( m  =  ( n  u. 
{ r } )  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  m ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )  =  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) )
1615mpt2eq3dv 6721 . . . . 5  |-  ( m  =  ( n  u. 
{ r } )  ->  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  m ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )  =  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( n  u.  {
r } ) ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) )
1716fveq2d 6195 . . . 4  |-  ( m  =  ( n  u. 
{ r } )  ->  ( D `  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  m ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) )  =  ( D `  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) ) )
1817eqeq2d 2632 . . 3  |-  ( m  =  ( n  u. 
{ r } )  ->  ( ( I ( J `  M
) H )  =  ( D `  (
k  e.  N , 
l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  m ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) )  <-> 
( I ( J `
 M ) H )  =  ( D `
 ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) ) ) )
19 eleq2 2690 . . . . . . . 8  |-  ( m  =  ( N  \  { H } )  -> 
( k  e.  m  <->  k  e.  ( N  \  { H } ) ) )
2019ifbid 4108 . . . . . . 7  |-  ( m  =  ( N  \  { H } )  ->  if ( k  e.  m ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) )  =  if ( k  e.  ( N 
\  { H }
) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )
2120ifeq2d 4105 . . . . . 6  |-  ( m  =  ( N  \  { H } )  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  m ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )  =  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( N  \  { H } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) )
2221mpt2eq3dv 6721 . . . . 5  |-  ( m  =  ( N  \  { H } )  -> 
( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  m ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) )  =  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  ( N 
\  { H }
) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) )
2322fveq2d 6195 . . . 4  |-  ( m  =  ( N  \  { H } )  -> 
( D `  (
k  e.  N , 
l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  m ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) )  =  ( D `  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( N  \  { H } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) ) )
2423eqeq2d 2632 . . 3  |-  ( m  =  ( N  \  { H } )  -> 
( ( I ( J `  M ) H )  =  ( D `  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  m ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) )  <-> 
( I ( J `
 M ) H )  =  ( D `
 ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  ( N 
\  { H }
) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) ) ) )
25 madufval.a . . . . . 6  |-  A  =  ( N Mat  R )
26 madufval.d . . . . . 6  |-  D  =  ( N maDet  R )
27 madufval.j . . . . . 6  |-  J  =  ( N maAdju  R )
28 madufval.b . . . . . 6  |-  B  =  ( Base `  A
)
29 madufval.o . . . . . 6  |-  .1.  =  ( 1r `  R )
30 madufval.z . . . . . 6  |-  .0.  =  ( 0g `  R )
3125, 26, 27, 28, 29, 30maducoeval 20445 . . . . 5  |-  ( ( M  e.  B  /\  I  e.  N  /\  H  e.  N )  ->  ( I ( J `
 M ) H )  =  ( D `
 ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  ( k M l ) ) ) ) )
32313adant1l 1318 . . . 4  |-  ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N
)  ->  ( I
( J `  M
) H )  =  ( D `  (
k  e.  N , 
l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  ( k M l ) ) ) ) )
33 noel 3919 . . . . . . . 8  |-  -.  k  e.  (/)
34 iffalse 4095 . . . . . . . 8  |-  ( -.  k  e.  (/)  ->  if ( k  e.  (/) ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) )  =  ( k M l ) )
3533, 34mp1i 13 . . . . . . 7  |-  ( ( k  e.  N  /\  l  e.  N )  ->  if ( k  e.  (/) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) )  =  ( k M l ) )
3635ifeq2d 4105 . . . . . 6  |-  ( ( k  e.  N  /\  l  e.  N )  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  (/) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )  =  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  ( k M l ) ) )
3736mpt2eq3ia 6720 . . . . 5  |-  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  (/) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) )  =  ( k  e.  N , 
l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  ( k M l ) ) )
3837fveq2i 6194 . . . 4  |-  ( D `
 ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  (/) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) )  =  ( D `  (
k  e.  N , 
l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  ( k M l ) ) ) )
3932, 38syl6eqr 2674 . . 3  |-  ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N
)  ->  ( I
( J `  M
) H )  =  ( D `  (
k  e.  N , 
l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  (/) ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) ) )
40 eqid 2622 . . . . . . 7  |-  ( Base `  R )  =  (
Base `  R )
41 eqid 2622 . . . . . . 7  |-  ( +g  `  R )  =  ( +g  `  R )
42 eqid 2622 . . . . . . 7  |-  ( .r
`  R )  =  ( .r `  R
)
43 simpl1l 1112 . . . . . . 7  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  R  e.  CRing )
44 simp1r 1086 . . . . . . . . 9  |-  ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N
)  ->  M  e.  B )
4525, 28matrcl 20218 . . . . . . . . . 10  |-  ( M  e.  B  ->  ( N  e.  Fin  /\  R  e.  _V ) )
4645simpld 475 . . . . . . . . 9  |-  ( M  e.  B  ->  N  e.  Fin )
4744, 46syl 17 . . . . . . . 8  |-  ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N
)  ->  N  e.  Fin )
4847adantr 481 . . . . . . 7  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  N  e.  Fin )
49 simp1l 1085 . . . . . . . . . . 11  |-  ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N
)  ->  R  e.  CRing
)
5049ad2antrr 762 . . . . . . . . . 10  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  R  e.  CRing )
51 crngring 18558 . . . . . . . . . 10  |-  ( R  e.  CRing  ->  R  e.  Ring )
5250, 51syl 17 . . . . . . . . 9  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  R  e.  Ring )
5340, 30ring0cl 18569 . . . . . . . . 9  |-  ( R  e.  Ring  ->  .0.  e.  ( Base `  R )
)
5452, 53syl 17 . . . . . . . 8  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  .0.  e.  ( Base `  R ) )
55 simpl1r 1113 . . . . . . . . . . 11  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  M  e.  B
)
5625, 40, 28matbas2i 20228 . . . . . . . . . . 11  |-  ( M  e.  B  ->  M  e.  ( ( Base `  R
)  ^m  ( N  X.  N ) ) )
57 elmapi 7879 . . . . . . . . . . 11  |-  ( M  e.  ( ( Base `  R )  ^m  ( N  X.  N ) )  ->  M : ( N  X.  N ) --> ( Base `  R
) )
5855, 56, 573syl 18 . . . . . . . . . 10  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  M : ( N  X.  N ) --> ( Base `  R
) )
5958adantr 481 . . . . . . . . 9  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  M : ( N  X.  N ) --> (
Base `  R )
)
60 eldifi 3732 . . . . . . . . . . . 12  |-  ( r  e.  ( ( N 
\  { H }
)  \  n )  ->  r  e.  ( N 
\  { H }
) )
6160ad2antll 765 . . . . . . . . . . 11  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  r  e.  ( N  \  { H } ) )
6261eldifad 3586 . . . . . . . . . 10  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  r  e.  N
)
6362adantr 481 . . . . . . . . 9  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  r  e.  N )
64 simpr 477 . . . . . . . . 9  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  l  e.  N )
6559, 63, 64fovrnd 6806 . . . . . . . 8  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  ( r M l )  e.  ( Base `  R ) )
6654, 65ifcld 4131 . . . . . . 7  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  if ( l  =  I ,  .0.  , 
( r M l ) )  e.  (
Base `  R )
)
6740, 29ringidcl 18568 . . . . . . . . 9  |-  ( R  e.  Ring  ->  .1.  e.  ( Base `  R )
)
6852, 67syl 17 . . . . . . . 8  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  .1.  e.  ( Base `  R ) )
6968, 54ifcld 4131 . . . . . . 7  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  if ( l  =  I ,  .1.  ,  .0.  )  e.  ( Base `  R ) )
70543adant2 1080 . . . . . . . . 9  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  ->  .0.  e.  ( Base `  R ) )
7158fovrnda 6805 . . . . . . . . . 10  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  ( k  e.  N  /\  l  e.  N
) )  ->  (
k M l )  e.  ( Base `  R
) )
72713impb 1260 . . . . . . . . 9  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  ->  ( k M l )  e.  ( Base `  R ) )
7370, 72ifcld 4131 . . . . . . . 8  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  ->  if ( l  =  I ,  .0.  , 
( k M l ) )  e.  (
Base `  R )
)
7473, 72ifcld 4131 . . . . . . 7  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  ->  if ( k  e.  n ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) )  e.  ( Base `  R
) )
75 simpl2 1065 . . . . . . . 8  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  I  e.  N
)
7658, 62, 75fovrnd 6806 . . . . . . 7  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  ( r M I )  e.  (
Base `  R )
)
77 simpl3 1066 . . . . . . 7  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  H  e.  N
)
78 eldifsni 4320 . . . . . . . 8  |-  ( r  e.  ( N  \  { H } )  -> 
r  =/=  H )
7961, 78syl 17 . . . . . . 7  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  r  =/=  H
)
8026, 40, 41, 42, 43, 48, 66, 69, 74, 76, 62, 77, 79mdetero 20416 . . . . . 6  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  ( D `  ( k  e.  N ,  l  e.  N  |->  if ( k  =  r ,  ( if ( l  =  I ,  .0.  ,  ( r M l ) ) ( +g  `  R
) ( ( r M I ) ( .r `  R ) if ( l  =  I ,  .1.  ,  .0.  ) ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) ) )  =  ( D `  (
k  e.  N , 
l  e.  N  |->  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) ) ) )
81 ifnot 4133 . . . . . . . . . . . . . . . . 17  |-  if ( -.  l  =  I ,  ( r M l ) ,  .0.  )  =  if (
l  =  I ,  .0.  ,  ( r M l ) )
8281eqcomi 2631 . . . . . . . . . . . . . . . 16  |-  if ( l  =  I ,  .0.  ,  ( r M l ) )  =  if ( -.  l  =  I ,  ( r M l ) ,  .0.  )
8382a1i 11 . . . . . . . . . . . . . . 15  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  if ( l  =  I ,  .0.  , 
( r M l ) )  =  if ( -.  l  =  I ,  ( r M l ) ,  .0.  ) )
84 ovif2 6738 . . . . . . . . . . . . . . . 16  |-  ( ( r M I ) ( .r `  R
) if ( l  =  I ,  .1.  ,  .0.  ) )  =  if ( l  =  I ,  ( ( r M I ) ( .r `  R
)  .1.  ) ,  ( ( r M I ) ( .r
`  R )  .0.  ) )
8576adantr 481 . . . . . . . . . . . . . . . . . . . . 21  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  ( r M I )  e.  ( Base `  R ) )
8640, 42, 29ringridm 18572 . . . . . . . . . . . . . . . . . . . . 21  |-  ( ( R  e.  Ring  /\  (
r M I )  e.  ( Base `  R
) )  ->  (
( r M I ) ( .r `  R )  .1.  )  =  ( r M I ) )
8752, 85, 86syl2anc 693 . . . . . . . . . . . . . . . . . . . 20  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  ( ( r M I ) ( .r
`  R )  .1.  )  =  ( r M I ) )
8887adantr 481 . . . . . . . . . . . . . . . . . . 19  |-  ( ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  /\  l  =  I
)  ->  ( (
r M I ) ( .r `  R
)  .1.  )  =  ( r M I ) )
89 oveq2 6658 . . . . . . . . . . . . . . . . . . . 20  |-  ( l  =  I  ->  (
r M l )  =  ( r M I ) )
9089adantl 482 . . . . . . . . . . . . . . . . . . 19  |-  ( ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  /\  l  =  I
)  ->  ( r M l )  =  ( r M I ) )
9188, 90eqtr4d 2659 . . . . . . . . . . . . . . . . . 18  |-  ( ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  /\  l  =  I
)  ->  ( (
r M I ) ( .r `  R
)  .1.  )  =  ( r M l ) )
9291ifeq1da 4116 . . . . . . . . . . . . . . . . 17  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  if ( l  =  I ,  ( ( r M I ) ( .r `  R
)  .1.  ) ,  ( ( r M I ) ( .r
`  R )  .0.  ) )  =  if ( l  =  I ,  ( r M l ) ,  ( ( r M I ) ( .r `  R )  .0.  )
) )
9340, 42, 30ringrz 18588 . . . . . . . . . . . . . . . . . . 19  |-  ( ( R  e.  Ring  /\  (
r M I )  e.  ( Base `  R
) )  ->  (
( r M I ) ( .r `  R )  .0.  )  =  .0.  )
9452, 85, 93syl2anc 693 . . . . . . . . . . . . . . . . . 18  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  ( ( r M I ) ( .r
`  R )  .0.  )  =  .0.  )
9594ifeq2d 4105 . . . . . . . . . . . . . . . . 17  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  if ( l  =  I ,  ( r M l ) ,  ( ( r M I ) ( .r
`  R )  .0.  ) )  =  if ( l  =  I ,  ( r M l ) ,  .0.  ) )
9692, 95eqtrd 2656 . . . . . . . . . . . . . . . 16  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  if ( l  =  I ,  ( ( r M I ) ( .r `  R
)  .1.  ) ,  ( ( r M I ) ( .r
`  R )  .0.  ) )  =  if ( l  =  I ,  ( r M l ) ,  .0.  ) )
9784, 96syl5eq 2668 . . . . . . . . . . . . . . 15  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  ( ( r M I ) ( .r
`  R ) if ( l  =  I ,  .1.  ,  .0.  ) )  =  if ( l  =  I ,  ( r M l ) ,  .0.  ) )
9883, 97oveq12d 6668 . . . . . . . . . . . . . 14  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  ( if ( l  =  I ,  .0.  ,  ( r M l ) ) ( +g  `  R ) ( ( r M I ) ( .r `  R
) if ( l  =  I ,  .1.  ,  .0.  ) ) )  =  ( if ( -.  l  =  I ,  ( r M l ) ,  .0.  ) ( +g  `  R
) if ( l  =  I ,  ( r M l ) ,  .0.  ) ) )
99 ringmnd 18556 . . . . . . . . . . . . . . . 16  |-  ( R  e.  Ring  ->  R  e. 
Mnd )
10052, 99syl 17 . . . . . . . . . . . . . . 15  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  R  e.  Mnd )
101 id 22 . . . . . . . . . . . . . . . . 17  |-  ( -.  l  =  I  ->  -.  l  =  I
)
102 imnan 438 . . . . . . . . . . . . . . . . 17  |-  ( ( -.  l  =  I  ->  -.  l  =  I )  <->  -.  ( -.  l  =  I  /\  l  =  I
) )
103101, 102mpbi 220 . . . . . . . . . . . . . . . 16  |-  -.  ( -.  l  =  I  /\  l  =  I
)
104103a1i 11 . . . . . . . . . . . . . . 15  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  -.  ( -.  l  =  I  /\  l  =  I ) )
10540, 30, 41mndifsplit 20442 . . . . . . . . . . . . . . 15  |-  ( ( R  e.  Mnd  /\  ( r M l )  e.  ( Base `  R )  /\  -.  ( -.  l  =  I  /\  l  =  I ) )  ->  if ( ( -.  l  =  I  \/  l  =  I ) ,  ( r M l ) ,  .0.  )  =  ( if ( -.  l  =  I ,  ( r M l ) ,  .0.  )
( +g  `  R ) if ( l  =  I ,  ( r M l ) ,  .0.  ) ) )
106100, 65, 104, 105syl3anc 1326 . . . . . . . . . . . . . 14  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  if ( ( -.  l  =  I  \/  l  =  I ) ,  ( r M l ) ,  .0.  )  =  ( if ( -.  l  =  I ,  ( r M l ) ,  .0.  ) ( +g  `  R ) if ( l  =  I ,  ( r M l ) ,  .0.  )
) )
107 pm2.1 433 . . . . . . . . . . . . . . 15  |-  ( -.  l  =  I  \/  l  =  I )
108 iftrue 4092 . . . . . . . . . . . . . . 15  |-  ( ( -.  l  =  I  \/  l  =  I )  ->  if (
( -.  l  =  I  \/  l  =  I ) ,  ( r M l ) ,  .0.  )  =  ( r M l ) )
109107, 108mp1i 13 . . . . . . . . . . . . . 14  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  if ( ( -.  l  =  I  \/  l  =  I ) ,  ( r M l ) ,  .0.  )  =  ( r M l ) )
11098, 106, 1093eqtr2d 2662 . . . . . . . . . . . . 13  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  l  e.  N )  ->  ( if ( l  =  I ,  .0.  ,  ( r M l ) ) ( +g  `  R ) ( ( r M I ) ( .r `  R
) if ( l  =  I ,  .1.  ,  .0.  ) ) )  =  ( r M l ) )
1111103adant2 1080 . . . . . . . . . . . 12  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  ->  ( if ( l  =  I ,  .0.  ,  ( r M l ) ) ( +g  `  R ) ( ( r M I ) ( .r `  R
) if ( l  =  I ,  .1.  ,  .0.  ) ) )  =  ( r M l ) )
112 oveq1 6657 . . . . . . . . . . . . 13  |-  ( k  =  r  ->  (
k M l )  =  ( r M l ) )
113112eqeq2d 2632 . . . . . . . . . . . 12  |-  ( k  =  r  ->  (
( if ( l  =  I ,  .0.  ,  ( r M l ) ) ( +g  `  R ) ( ( r M I ) ( .r `  R
) if ( l  =  I ,  .1.  ,  .0.  ) ) )  =  ( k M l )  <->  ( if ( l  =  I ,  .0.  ,  ( r M l ) ) ( +g  `  R
) ( ( r M I ) ( .r `  R ) if ( l  =  I ,  .1.  ,  .0.  ) ) )  =  ( r M l ) ) )
114111, 113syl5ibrcom 237 . . . . . . . . . . 11  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  ->  ( k  =  r  ->  ( if ( l  =  I ,  .0.  ,  ( r M l ) ) ( +g  `  R
) ( ( r M I ) ( .r `  R ) if ( l  =  I ,  .1.  ,  .0.  ) ) )  =  ( k M l ) ) )
115114imp 445 . . . . . . . . . 10  |-  ( ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  /\  k  =  r
)  ->  ( if ( l  =  I ,  .0.  ,  ( r M l ) ) ( +g  `  R
) ( ( r M I ) ( .r `  R ) if ( l  =  I ,  .1.  ,  .0.  ) ) )  =  ( k M l ) )
116 iftrue 4092 . . . . . . . . . . 11  |-  ( k  =  r  ->  if ( k  =  r ,  ( if ( l  =  I ,  .0.  ,  ( r M l ) ) ( +g  `  R
) ( ( r M I ) ( .r `  R ) if ( l  =  I ,  .1.  ,  .0.  ) ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) )  =  ( if ( l  =  I ,  .0.  ,  ( r M l ) ) ( +g  `  R
) ( ( r M I ) ( .r `  R ) if ( l  =  I ,  .1.  ,  .0.  ) ) ) )
117116adantl 482 . . . . . . . . . 10  |-  ( ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  /\  k  =  r
)  ->  if (
k  =  r ,  ( if ( l  =  I ,  .0.  ,  ( r M l ) ) ( +g  `  R ) ( ( r M I ) ( .r `  R
) if ( l  =  I ,  .1.  ,  .0.  ) ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )  =  ( if ( l  =  I ,  .0.  ,  ( r M l ) ) ( +g  `  R ) ( ( r M I ) ( .r `  R
) if ( l  =  I ,  .1.  ,  .0.  ) ) ) )
11879neneqd 2799 . . . . . . . . . . . . . . 15  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  -.  r  =  H )
1191183ad2ant1 1082 . . . . . . . . . . . . . 14  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  ->  -.  r  =  H )
120 eqeq1 2626 . . . . . . . . . . . . . . 15  |-  ( k  =  r  ->  (
k  =  H  <->  r  =  H ) )
121120notbid 308 . . . . . . . . . . . . . 14  |-  ( k  =  r  ->  ( -.  k  =  H  <->  -.  r  =  H ) )
122119, 121syl5ibrcom 237 . . . . . . . . . . . . 13  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  ->  ( k  =  r  ->  -.  k  =  H ) )
123122imp 445 . . . . . . . . . . . 12  |-  ( ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  /\  k  =  r
)  ->  -.  k  =  H )
124123iffalsed 4097 . . . . . . . . . . 11  |-  ( ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  /\  k  =  r
)  ->  if (
k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )  =  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )
125 eldifn 3733 . . . . . . . . . . . . . . . 16  |-  ( r  e.  ( ( N 
\  { H }
)  \  n )  ->  -.  r  e.  n
)
126125ad2antll 765 . . . . . . . . . . . . . . 15  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  -.  r  e.  n )
1271263ad2ant1 1082 . . . . . . . . . . . . . 14  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  ->  -.  r  e.  n
)
128 eleq1 2689 . . . . . . . . . . . . . . 15  |-  ( k  =  r  ->  (
k  e.  n  <->  r  e.  n ) )
129128notbid 308 . . . . . . . . . . . . . 14  |-  ( k  =  r  ->  ( -.  k  e.  n  <->  -.  r  e.  n ) )
130127, 129syl5ibrcom 237 . . . . . . . . . . . . 13  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  ->  ( k  =  r  ->  -.  k  e.  n ) )
131130imp 445 . . . . . . . . . . . 12  |-  ( ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  /\  k  =  r
)  ->  -.  k  e.  n )
132131iffalsed 4097 . . . . . . . . . . 11  |-  ( ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  /\  k  =  r
)  ->  if (
k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) )  =  ( k M l ) )
133124, 132eqtrd 2656 . . . . . . . . . 10  |-  ( ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  /\  k  =  r
)  ->  if (
k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )  =  ( k M l ) )
134115, 117, 1333eqtr4d 2666 . . . . . . . . 9  |-  ( ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  /\  k  =  r
)  ->  if (
k  =  r ,  ( if ( l  =  I ,  .0.  ,  ( r M l ) ) ( +g  `  R ) ( ( r M I ) ( .r `  R
) if ( l  =  I ,  .1.  ,  .0.  ) ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )  =  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) )
135 iffalse 4095 . . . . . . . . . 10  |-  ( -.  k  =  r  ->  if ( k  =  r ,  ( if ( l  =  I ,  .0.  ,  ( r M l ) ) ( +g  `  R
) ( ( r M I ) ( .r `  R ) if ( l  =  I ,  .1.  ,  .0.  ) ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) )  =  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )
136135adantl 482 . . . . . . . . 9  |-  ( ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  /\  -.  k  =  r )  ->  if (
k  =  r ,  ( if ( l  =  I ,  .0.  ,  ( r M l ) ) ( +g  `  R ) ( ( r M I ) ( .r `  R
) if ( l  =  I ,  .1.  ,  .0.  ) ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )  =  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) )
137134, 136pm2.61dan 832 . . . . . . . 8  |-  ( ( ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N )  /\  (
n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n
) ) )  /\  k  e.  N  /\  l  e.  N )  ->  if ( k  =  r ,  ( if ( l  =  I ,  .0.  ,  ( r M l ) ) ( +g  `  R
) ( ( r M I ) ( .r `  R ) if ( l  =  I ,  .1.  ,  .0.  ) ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) )  =  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )
138137mpt2eq3dva 6719 . . . . . . 7  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  ( k  e.  N ,  l  e.  N  |->  if ( k  =  r ,  ( if ( l  =  I ,  .0.  , 
( r M l ) ) ( +g  `  R ) ( ( r M I ) ( .r `  R
) if ( l  =  I ,  .1.  ,  .0.  ) ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) )  =  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) )
139138fveq2d 6195 . . . . . 6  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  ( D `  ( k  e.  N ,  l  e.  N  |->  if ( k  =  r ,  ( if ( l  =  I ,  .0.  ,  ( r M l ) ) ( +g  `  R
) ( ( r M I ) ( .r `  R ) if ( l  =  I ,  .1.  ,  .0.  ) ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) ) )  =  ( D `  (
k  e.  N , 
l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) ) )
140 neeq2 2857 . . . . . . . . . . . . . . 15  |-  ( k  =  H  ->  (
r  =/=  k  <->  r  =/=  H ) )
141140biimparc 504 . . . . . . . . . . . . . 14  |-  ( ( r  =/=  H  /\  k  =  H )  ->  r  =/=  k )
142141necomd 2849 . . . . . . . . . . . . 13  |-  ( ( r  =/=  H  /\  k  =  H )  ->  k  =/=  r )
143142neneqd 2799 . . . . . . . . . . . 12  |-  ( ( r  =/=  H  /\  k  =  H )  ->  -.  k  =  r )
144143iffalsed 4097 . . . . . . . . . . 11  |-  ( ( r  =/=  H  /\  k  =  H )  ->  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( l  =  I ,  .1.  ,  .0.  ) )  =  if ( l  =  I ,  .1.  ,  .0.  ) )
145 iftrue 4092 . . . . . . . . . . . . 13  |-  ( k  =  H  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )  =  if ( l  =  I ,  .1.  ,  .0.  ) )
146145adantl 482 . . . . . . . . . . . 12  |-  ( ( r  =/=  H  /\  k  =  H )  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )  =  if ( l  =  I ,  .1.  ,  .0.  ) )
147146ifeq2d 4105 . . . . . . . . . . 11  |-  ( ( r  =/=  H  /\  k  =  H )  ->  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )  =  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( l  =  I ,  .1.  ,  .0.  ) ) )
148 iftrue 4092 . . . . . . . . . . . 12  |-  ( k  =  H  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )  =  if ( l  =  I ,  .1.  ,  .0.  )
)
149148adantl 482 . . . . . . . . . . 11  |-  ( ( r  =/=  H  /\  k  =  H )  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( n  u.  {
r } ) ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )  =  if ( l  =  I ,  .1.  ,  .0.  ) )
150144, 147, 1493eqtr4d 2666 . . . . . . . . . 10  |-  ( ( r  =/=  H  /\  k  =  H )  ->  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )  =  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( n  u.  {
r } ) ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )
151112ifeq2d 4105 . . . . . . . . . . . . . 14  |-  ( k  =  r  ->  if ( l  =  I ,  .0.  ,  ( k M l ) )  =  if ( l  =  I ,  .0.  ,  ( r M l ) ) )
152 vsnid 4209 . . . . . . . . . . . . . . . . 17  |-  r  e. 
{ r }
153 elun2 3781 . . . . . . . . . . . . . . . . 17  |-  ( r  e.  { r }  ->  r  e.  ( n  u.  { r } ) )
154152, 153ax-mp 5 . . . . . . . . . . . . . . . 16  |-  r  e.  ( n  u.  {
r } )
155 eleq1 2689 . . . . . . . . . . . . . . . 16  |-  ( k  =  r  ->  (
k  e.  ( n  u.  { r } )  <->  r  e.  ( n  u.  { r } ) ) )
156154, 155mpbiri 248 . . . . . . . . . . . . . . 15  |-  ( k  =  r  ->  k  e.  ( n  u.  {
r } ) )
157156iftrued 4094 . . . . . . . . . . . . . 14  |-  ( k  =  r  ->  if ( k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) )  =  if ( l  =  I ,  .0.  ,  ( k M l ) ) )
158 iftrue 4092 . . . . . . . . . . . . . 14  |-  ( k  =  r  ->  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )  =  if ( l  =  I ,  .0.  ,  ( r M l ) ) )
159151, 157, 1583eqtr4rd 2667 . . . . . . . . . . . . 13  |-  ( k  =  r  ->  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )  =  if ( k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )
160159adantl 482 . . . . . . . . . . . 12  |-  ( ( ( r  =/=  H  /\  -.  k  =  H )  /\  k  =  r )  ->  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )  =  if ( k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )
161 iffalse 4095 . . . . . . . . . . . . . 14  |-  ( -.  k  =  r  ->  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )  =  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )
162 orc 400 . . . . . . . . . . . . . . . . 17  |-  ( k  e.  n  ->  (
k  e.  n  \/  k  =  r ) )
163 orel2 398 . . . . . . . . . . . . . . . . 17  |-  ( -.  k  =  r  -> 
( ( k  e.  n  \/  k  =  r )  ->  k  e.  n ) )
164162, 163impbid2 216 . . . . . . . . . . . . . . . 16  |-  ( -.  k  =  r  -> 
( k  e.  n  <->  ( k  e.  n  \/  k  =  r ) ) )
165 elun 3753 . . . . . . . . . . . . . . . . 17  |-  ( k  e.  ( n  u. 
{ r } )  <-> 
( k  e.  n  \/  k  e.  { r } ) )
166 velsn 4193 . . . . . . . . . . . . . . . . . 18  |-  ( k  e.  { r }  <-> 
k  =  r )
167166orbi2i 541 . . . . . . . . . . . . . . . . 17  |-  ( ( k  e.  n  \/  k  e.  { r } )  <->  ( k  e.  n  \/  k  =  r ) )
168165, 167bitr2i 265 . . . . . . . . . . . . . . . 16  |-  ( ( k  e.  n  \/  k  =  r )  <-> 
k  e.  ( n  u.  { r } ) )
169164, 168syl6bb 276 . . . . . . . . . . . . . . 15  |-  ( -.  k  =  r  -> 
( k  e.  n  <->  k  e.  ( n  u. 
{ r } ) ) )
170169ifbid 4108 . . . . . . . . . . . . . 14  |-  ( -.  k  =  r  ->  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) )  =  if ( k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )
171161, 170eqtrd 2656 . . . . . . . . . . . . 13  |-  ( -.  k  =  r  ->  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )  =  if ( k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )
172171adantl 482 . . . . . . . . . . . 12  |-  ( ( ( r  =/=  H  /\  -.  k  =  H )  /\  -.  k  =  r )  ->  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )  =  if ( k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )
173160, 172pm2.61dan 832 . . . . . . . . . . 11  |-  ( ( r  =/=  H  /\  -.  k  =  H
)  ->  if (
k  =  r ,  if ( l  =  I ,  .0.  , 
( r M l ) ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )  =  if ( k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )
174 iffalse 4095 . . . . . . . . . . . . 13  |-  ( -.  k  =  H  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )  =  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) )
175174ifeq2d 4105 . . . . . . . . . . . 12  |-  ( -.  k  =  H  ->  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )  =  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) )
176175adantl 482 . . . . . . . . . . 11  |-  ( ( r  =/=  H  /\  -.  k  =  H
)  ->  if (
k  =  r ,  if ( l  =  I ,  .0.  , 
( r M l ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )  =  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) )
177 iffalse 4095 . . . . . . . . . . . 12  |-  ( -.  k  =  H  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )  =  if ( k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )
178177adantl 482 . . . . . . . . . . 11  |-  ( ( r  =/=  H  /\  -.  k  =  H
)  ->  if (
k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )  =  if ( k  e.  ( n  u. 
{ r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )
179173, 176, 1783eqtr4d 2666 . . . . . . . . . 10  |-  ( ( r  =/=  H  /\  -.  k  =  H
)  ->  if (
k  =  r ,  if ( l  =  I ,  .0.  , 
( r M l ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )  =  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( n  u.  {
r } ) ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )
180150, 179pm2.61dan 832 . . . . . . . . 9  |-  ( r  =/=  H  ->  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )  =  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( n  u.  {
r } ) ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) )
181180mpt2eq3dv 6721 . . . . . . . 8  |-  ( r  =/=  H  ->  (
k  e.  N , 
l  e.  N  |->  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) )  =  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) )
182181fveq2d 6195 . . . . . . 7  |-  ( r  =/=  H  ->  ( D `  ( k  e.  N ,  l  e.  N  |->  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) ) )  =  ( D `
 ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) ) )
18379, 182syl 17 . . . . . 6  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  ( D `  ( k  e.  N ,  l  e.  N  |->  if ( k  =  r ,  if ( l  =  I ,  .0.  ,  ( r M l ) ) ,  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) ) )  =  ( D `
 ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) ) )
18480, 139, 1833eqtr3d 2664 . . . . 5  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  ( D `  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) )  =  ( D `  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) ) )
185184eqeq2d 2632 . . . 4  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  ( ( I ( J `  M
) H )  =  ( D `  (
k  e.  N , 
l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) )  <-> 
( I ( J `
 M ) H )  =  ( D `
 ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) ) ) )
186185biimpd 219 . . 3  |-  ( ( ( ( R  e. 
CRing  /\  M  e.  B
)  /\  I  e.  N  /\  H  e.  N
)  /\  ( n  C_  ( N  \  { H } )  /\  r  e.  ( ( N  \  { H } )  \  n ) ) )  ->  ( ( I ( J `  M
) H )  =  ( D `  (
k  e.  N , 
l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  n ,  if ( l  =  I ,  .0.  , 
( k M l ) ) ,  ( k M l ) ) ) ) )  ->  ( I ( J `  M ) H )  =  ( D `  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  ( n  u.  { r } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) ) ) )
187 difss 3737 . . . 4  |-  ( N 
\  { H }
)  C_  N
188 ssfi 8180 . . . 4  |-  ( ( N  e.  Fin  /\  ( N  \  { H } )  C_  N
)  ->  ( N  \  { H } )  e.  Fin )
18947, 187, 188sylancl 694 . . 3  |-  ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N
)  ->  ( N  \  { H } )  e.  Fin )
1906, 12, 18, 24, 39, 186, 189findcard2d 8202 . 2  |-  ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N
)  ->  ( I
( J `  M
) H )  =  ( D `  (
k  e.  N , 
l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( N  \  { H } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) ) )
191 iba 524 . . . . . . . 8  |-  ( k  =  H  ->  (
l  =  I  <->  ( l  =  I  /\  k  =  H ) ) )
192191ifbid 4108 . . . . . . 7  |-  ( k  =  H  ->  if ( l  =  I ,  .1.  ,  .0.  )  =  if (
( l  =  I  /\  k  =  H ) ,  .1.  ,  .0.  ) )
193 iftrue 4092 . . . . . . 7  |-  ( k  =  H  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( N  \  { H } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )  =  if ( l  =  I ,  .1.  ,  .0.  )
)
194 iftrue 4092 . . . . . . . 8  |-  ( ( k  =  H  \/  l  =  I )  ->  if ( ( k  =  H  \/  l  =  I ) ,  if ( ( l  =  I  /\  k  =  H ) ,  .1.  ,  .0.  ) ,  ( k M l ) )  =  if ( ( l  =  I  /\  k  =  H ) ,  .1.  ,  .0.  ) )
195194orcs 409 . . . . . . 7  |-  ( k  =  H  ->  if ( ( k  =  H  \/  l  =  I ) ,  if ( ( l  =  I  /\  k  =  H ) ,  .1.  ,  .0.  ) ,  ( k M l ) )  =  if ( ( l  =  I  /\  k  =  H ) ,  .1.  ,  .0.  ) )
196192, 193, 1953eqtr4d 2666 . . . . . 6  |-  ( k  =  H  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( N  \  { H } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )  =  if ( ( k  =  H  \/  l  =  I ) ,  if ( ( l  =  I  /\  k  =  H ) ,  .1.  ,  .0.  ) ,  ( k M l ) ) )
197196adantl 482 . . . . 5  |-  ( ( ( k  e.  N  /\  l  e.  N
)  /\  k  =  H )  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( N  \  { H } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )  =  if ( ( k  =  H  \/  l  =  I ) ,  if ( ( l  =  I  /\  k  =  H ) ,  .1.  ,  .0.  ) ,  ( k M l ) ) )
198 iffalse 4095 . . . . . . 7  |-  ( -.  k  =  H  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( N  \  { H } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )  =  if ( k  e.  ( N 
\  { H }
) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )
199198adantl 482 . . . . . 6  |-  ( ( ( k  e.  N  /\  l  e.  N
)  /\  -.  k  =  H )  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( N  \  { H } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )  =  if ( k  e.  ( N 
\  { H }
) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )
200 id 22 . . . . . . . . . . 11  |-  ( -.  k  =  H  ->  -.  k  =  H
)
201200neqned 2801 . . . . . . . . . 10  |-  ( -.  k  =  H  -> 
k  =/=  H )
202201anim2i 593 . . . . . . . . 9  |-  ( ( k  e.  N  /\  -.  k  =  H
)  ->  ( k  e.  N  /\  k  =/=  H ) )
203202adantlr 751 . . . . . . . 8  |-  ( ( ( k  e.  N  /\  l  e.  N
)  /\  -.  k  =  H )  ->  (
k  e.  N  /\  k  =/=  H ) )
204 eldifsn 4317 . . . . . . . 8  |-  ( k  e.  ( N  \  { H } )  <->  ( k  e.  N  /\  k  =/=  H ) )
205203, 204sylibr 224 . . . . . . 7  |-  ( ( ( k  e.  N  /\  l  e.  N
)  /\  -.  k  =  H )  ->  k  e.  ( N  \  { H } ) )
206205iftrued 4094 . . . . . 6  |-  ( ( ( k  e.  N  /\  l  e.  N
)  /\  -.  k  =  H )  ->  if ( k  e.  ( N  \  { H } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) )  =  if ( l  =  I ,  .0.  ,  ( k M l ) ) )
207 biorf 420 . . . . . . . 8  |-  ( -.  k  =  H  -> 
( l  =  I  <-> 
( k  =  H  \/  l  =  I ) ) )
208200intnand 962 . . . . . . . . . 10  |-  ( -.  k  =  H  ->  -.  ( l  =  I  /\  k  =  H ) )
209208iffalsed 4097 . . . . . . . . 9  |-  ( -.  k  =  H  ->  if ( ( l  =  I  /\  k  =  H ) ,  .1.  ,  .0.  )  =  .0.  )
210209eqcomd 2628 . . . . . . . 8  |-  ( -.  k  =  H  ->  .0.  =  if ( ( l  =  I  /\  k  =  H ) ,  .1.  ,  .0.  )
)
211207, 210ifbieq1d 4109 . . . . . . 7  |-  ( -.  k  =  H  ->  if ( l  =  I ,  .0.  ,  ( k M l ) )  =  if ( ( k  =  H  \/  l  =  I ) ,  if ( ( l  =  I  /\  k  =  H ) ,  .1.  ,  .0.  ) ,  ( k M l ) ) )
212211adantl 482 . . . . . 6  |-  ( ( ( k  e.  N  /\  l  e.  N
)  /\  -.  k  =  H )  ->  if ( l  =  I ,  .0.  ,  ( k M l ) )  =  if ( ( k  =  H  \/  l  =  I ) ,  if ( ( l  =  I  /\  k  =  H ) ,  .1.  ,  .0.  ) ,  ( k M l ) ) )
213199, 206, 2123eqtrd 2660 . . . . 5  |-  ( ( ( k  e.  N  /\  l  e.  N
)  /\  -.  k  =  H )  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( N  \  { H } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )  =  if ( ( k  =  H  \/  l  =  I ) ,  if ( ( l  =  I  /\  k  =  H ) ,  .1.  ,  .0.  ) ,  ( k M l ) ) )
214197, 213pm2.61dan 832 . . . 4  |-  ( ( k  e.  N  /\  l  e.  N )  ->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if ( k  e.  ( N  \  { H } ) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) )  =  if ( ( k  =  H  \/  l  =  I ) ,  if ( ( l  =  I  /\  k  =  H ) ,  .1.  ,  .0.  ) ,  ( k M l ) ) )
215214mpt2eq3ia 6720 . . 3  |-  ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  ( N 
\  { H }
) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) )  =  ( k  e.  N ,  l  e.  N  |->  if ( ( k  =  H  \/  l  =  I ) ,  if ( ( l  =  I  /\  k  =  H ) ,  .1.  ,  .0.  ) ,  ( k M l ) ) )
216215fveq2i 6194 . 2  |-  ( D `
 ( k  e.  N ,  l  e.  N  |->  if ( k  =  H ,  if ( l  =  I ,  .1.  ,  .0.  ) ,  if (
k  e.  ( N 
\  { H }
) ,  if ( l  =  I ,  .0.  ,  ( k M l ) ) ,  ( k M l ) ) ) ) )  =  ( D `  ( k  e.  N ,  l  e.  N  |->  if ( ( k  =  H  \/  l  =  I ) ,  if ( ( l  =  I  /\  k  =  H ) ,  .1.  ,  .0.  ) ,  ( k M l ) ) ) )
217190, 216syl6eq 2672 1  |-  ( ( ( R  e.  CRing  /\  M  e.  B )  /\  I  e.  N  /\  H  e.  N
)  ->  ( I
( J `  M
) H )  =  ( D `  (
k  e.  N , 
l  e.  N  |->  if ( ( k  =  H  \/  l  =  I ) ,  if ( ( l  =  I  /\  k  =  H ) ,  .1.  ,  .0.  ) ,  ( k M l ) ) ) ) )
Colors of variables: wff setvar class
Syntax hints:   -. wn 3    -> wi 4    \/ wo 383    /\ wa 384    /\ w3a 1037    = wceq 1483    e. wcel 1990    =/= wne 2794   _Vcvv 3200    \ cdif 3571    u. cun 3572    C_ wss 3574   (/)c0 3915   ifcif 4086   {csn 4177    X. cxp 5112   -->wf 5884   ` cfv 5888  (class class class)co 6650    |-> cmpt2 6652    ^m cmap 7857   Fincfn 7955   Basecbs 15857   +g cplusg 15941   .rcmulr 15942   0gc0g 16100   Mndcmnd 17294   1rcur 18501   Ringcrg 18547   CRingccrg 18548   Mat cmat 20213   maDet cmdat 20390   maAdju cmadu 20438
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-inf2 8538  ax-cnex 9992  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-mulcom 10000  ax-addass 10001  ax-mulass 10002  ax-distr 10003  ax-i2m1 10004  ax-1ne0 10005  ax-1rid 10006  ax-rnegex 10007  ax-rrecex 10008  ax-cnre 10009  ax-pre-lttri 10010  ax-pre-lttrn 10011  ax-pre-ltadd 10012  ax-pre-mulgt0 10013  ax-addf 10015  ax-mulf 10016
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-xor 1465  df-tru 1486  df-fal 1489  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-reu 2919  df-rmo 2920  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-ot 4186  df-uni 4437  df-int 4476  df-iun 4522  df-iin 4523  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-se 5074  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-isom 5897  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-of 6897  df-om 7066  df-1st 7168  df-2nd 7169  df-supp 7296  df-tpos 7352  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-1o 7560  df-2o 7561  df-oadd 7564  df-er 7742  df-map 7859  df-pm 7860  df-ixp 7909  df-en 7956  df-dom 7957  df-sdom 7958  df-fin 7959  df-fsupp 8276  df-sup 8348  df-oi 8415  df-card 8765  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-div 10685  df-nn 11021  df-2 11079  df-3 11080  df-4 11081  df-5 11082  df-6 11083  df-7 11084  df-8 11085  df-9 11086  df-n0 11293  df-xnn0 11364  df-z 11378  df-dec 11494  df-uz 11688  df-rp 11833  df-fz 12327  df-fzo 12466  df-seq 12802  df-exp 12861  df-hash 13118  df-word 13299  df-lsw 13300  df-concat 13301  df-s1 13302  df-substr 13303  df-splice 13304  df-reverse 13305  df-s2 13593  df-struct 15859  df-ndx 15860  df-slot 15861  df-base 15863  df-sets 15864  df-ress 15865  df-plusg 15954  df-mulr 15955  df-starv 15956  df-sca 15957  df-vsca 15958  df-ip 15959  df-tset 15960  df-ple 15961  df-ds 15964  df-unif 15965  df-hom 15966  df-cco 15967  df-0g 16102  df-gsum 16103  df-prds 16108  df-pws 16110  df-mre 16246  df-mrc 16247  df-acs 16249  df-mgm 17242  df-sgrp 17284  df-mnd 17295  df-mhm 17335  df-submnd 17336  df-grp 17425  df-minusg 17426  df-mulg 17541  df-subg 17591  df-ghm 17658  df-gim 17701  df-cntz 17750  df-oppg 17776  df-symg 17798  df-pmtr 17862  df-psgn 17911  df-evpm 17912  df-cmn 18195  df-abl 18196  df-mgp 18490  df-ur 18502  df-ring 18549  df-cring 18550  df-oppr 18623  df-dvdsr 18641  df-unit 18642  df-invr 18672  df-dvr 18683  df-rnghom 18715  df-drng 18749  df-subrg 18778  df-sra 19172  df-rgmod 19173  df-cnfld 19747  df-zring 19819  df-zrh 19852  df-dsmm 20076  df-frlm 20091  df-mat 20214  df-mdet 20391  df-madu 20440
This theorem is referenced by:  madutpos  20448
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