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Theorem 2llnjN 34853
Description: The join of two different lattice lines in a lattice plane equals the plane. (Contributed by NM, 4-Jul-2012.) (New usage is discouraged.)
Hypotheses
Ref Expression
2llnj.l  |-  .<_  =  ( le `  K )
2llnj.j  |-  .\/  =  ( join `  K )
2llnj.n  |-  N  =  ( LLines `  K )
2llnj.p  |-  P  =  ( LPlanes `  K )
Assertion
Ref Expression
2llnjN  |-  ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  ->  ( X  .\/  Y )  =  W )

Proof of Theorem 2llnjN
Dummy variables  r 
q  s  t are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqid 2622 . . . . . . . 8  |-  ( Base `  K )  =  (
Base `  K )
2 2llnj.j . . . . . . . 8  |-  .\/  =  ( join `  K )
3 eqid 2622 . . . . . . . 8  |-  ( Atoms `  K )  =  (
Atoms `  K )
4 2llnj.n . . . . . . . 8  |-  N  =  ( LLines `  K )
51, 2, 3, 4islln2 34797 . . . . . . 7  |-  ( K  e.  HL  ->  ( X  e.  N  <->  ( X  e.  ( Base `  K
)  /\  E. q  e.  ( Atoms `  K ) E. r  e.  ( Atoms `  K ) ( q  =/=  r  /\  X  =  ( q  .\/  r ) ) ) ) )
6 simpr 477 . . . . . . 7  |-  ( ( X  e.  ( Base `  K )  /\  E. q  e.  ( Atoms `  K ) E. r  e.  ( Atoms `  K )
( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  ->  E. q  e.  ( Atoms `  K ) E. r  e.  ( Atoms `  K ) ( q  =/=  r  /\  X  =  ( q  .\/  r ) ) )
75, 6syl6bi 243 . . . . . 6  |-  ( K  e.  HL  ->  ( X  e.  N  ->  E. q  e.  ( Atoms `  K ) E. r  e.  ( Atoms `  K )
( q  =/=  r  /\  X  =  (
q  .\/  r )
) ) )
81, 2, 3, 4islln2 34797 . . . . . . 7  |-  ( K  e.  HL  ->  ( Y  e.  N  <->  ( Y  e.  ( Base `  K
)  /\  E. s  e.  ( Atoms `  K ) E. t  e.  ( Atoms `  K ) ( s  =/=  t  /\  Y  =  ( s  .\/  t ) ) ) ) )
9 simpr 477 . . . . . . 7  |-  ( ( Y  e.  ( Base `  K )  /\  E. s  e.  ( Atoms `  K ) E. t  e.  ( Atoms `  K )
( s  =/=  t  /\  Y  =  (
s  .\/  t )
) )  ->  E. s  e.  ( Atoms `  K ) E. t  e.  ( Atoms `  K ) ( s  =/=  t  /\  Y  =  ( s  .\/  t ) ) )
108, 9syl6bi 243 . . . . . 6  |-  ( K  e.  HL  ->  ( Y  e.  N  ->  E. s  e.  ( Atoms `  K ) E. t  e.  ( Atoms `  K )
( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )
117, 10anim12d 586 . . . . 5  |-  ( K  e.  HL  ->  (
( X  e.  N  /\  Y  e.  N
)  ->  ( E. q  e.  ( Atoms `  K ) E. r  e.  ( Atoms `  K )
( q  =/=  r  /\  X  =  (
q  .\/  r )
)  /\  E. s  e.  ( Atoms `  K ) E. t  e.  ( Atoms `  K ) ( s  =/=  t  /\  Y  =  ( s  .\/  t ) ) ) ) )
1211imp 445 . . . 4  |-  ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N
) )  ->  ( E. q  e.  ( Atoms `  K ) E. r  e.  ( Atoms `  K ) ( q  =/=  r  /\  X  =  ( q  .\/  r ) )  /\  E. s  e.  ( Atoms `  K ) E. t  e.  ( Atoms `  K )
( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )
13123adantr3 1222 . . 3  |-  ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
) )  ->  ( E. q  e.  ( Atoms `  K ) E. r  e.  ( Atoms `  K ) ( q  =/=  r  /\  X  =  ( q  .\/  r ) )  /\  E. s  e.  ( Atoms `  K ) E. t  e.  ( Atoms `  K )
( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )
14133adant3 1081 . 2  |-  ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  ->  ( E. q  e.  ( Atoms `  K ) E. r  e.  ( Atoms `  K ) ( q  =/=  r  /\  X  =  ( q  .\/  r ) )  /\  E. s  e.  ( Atoms `  K ) E. t  e.  ( Atoms `  K )
( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )
15 simp2rr 1131 . . . . . . . . . . 11  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  /\  (
( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  /\  ( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )  ->  X  =  ( q  .\/  r ) )
16 simp3rr 1135 . . . . . . . . . . 11  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  /\  (
( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  /\  ( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )  ->  Y  =  ( s  .\/  t ) )
1715, 16oveq12d 6668 . . . . . . . . . 10  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  /\  (
( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  /\  ( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )  -> 
( X  .\/  Y
)  =  ( ( q  .\/  r ) 
.\/  ( s  .\/  t ) ) )
18 simp13 1093 . . . . . . . . . . . 12  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  /\  (
( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  /\  ( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )  -> 
( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y ) )
19 breq1 4656 . . . . . . . . . . . . . . 15  |-  ( X  =  ( q  .\/  r )  ->  ( X  .<_  W  <->  ( q  .\/  r )  .<_  W ) )
20 neeq1 2856 . . . . . . . . . . . . . . 15  |-  ( X  =  ( q  .\/  r )  ->  ( X  =/=  Y  <->  ( q  .\/  r )  =/=  Y
) )
2119, 203anbi13d 1401 . . . . . . . . . . . . . 14  |-  ( X  =  ( q  .\/  r )  ->  (
( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y )  <->  ( (
q  .\/  r )  .<_  W  /\  Y  .<_  W  /\  ( q  .\/  r )  =/=  Y
) ) )
22 breq1 4656 . . . . . . . . . . . . . . 15  |-  ( Y  =  ( s  .\/  t )  ->  ( Y  .<_  W  <->  ( s  .\/  t )  .<_  W ) )
23 neeq2 2857 . . . . . . . . . . . . . . 15  |-  ( Y  =  ( s  .\/  t )  ->  (
( q  .\/  r
)  =/=  Y  <->  ( q  .\/  r )  =/=  (
s  .\/  t )
) )
2422, 233anbi23d 1402 . . . . . . . . . . . . . 14  |-  ( Y  =  ( s  .\/  t )  ->  (
( ( q  .\/  r )  .<_  W  /\  Y  .<_  W  /\  (
q  .\/  r )  =/=  Y )  <->  ( (
q  .\/  r )  .<_  W  /\  ( s 
.\/  t )  .<_  W  /\  ( q  .\/  r )  =/=  (
s  .\/  t )
) ) )
2521, 24sylan9bb 736 . . . . . . . . . . . . 13  |-  ( ( X  =  ( q 
.\/  r )  /\  Y  =  ( s  .\/  t ) )  -> 
( ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y )  <->  ( (
q  .\/  r )  .<_  W  /\  ( s 
.\/  t )  .<_  W  /\  ( q  .\/  r )  =/=  (
s  .\/  t )
) ) )
2615, 16, 25syl2anc 693 . . . . . . . . . . . 12  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  /\  (
( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  /\  ( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )  -> 
( ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y )  <->  ( (
q  .\/  r )  .<_  W  /\  ( s 
.\/  t )  .<_  W  /\  ( q  .\/  r )  =/=  (
s  .\/  t )
) ) )
2718, 26mpbid 222 . . . . . . . . . . 11  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  /\  (
( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  /\  ( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )  -> 
( ( q  .\/  r )  .<_  W  /\  ( s  .\/  t
)  .<_  W  /\  (
q  .\/  r )  =/=  ( s  .\/  t
) ) )
28 simp11 1091 . . . . . . . . . . . 12  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  /\  (
( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  /\  ( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )  ->  K  e.  HL )
29 simp123 1195 . . . . . . . . . . . 12  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  /\  (
( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  /\  ( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )  ->  W  e.  P )
30 simp2ll 1128 . . . . . . . . . . . 12  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  /\  (
( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  /\  ( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )  -> 
q  e.  ( Atoms `  K ) )
31 simp2lr 1129 . . . . . . . . . . . 12  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  /\  (
( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  /\  ( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )  -> 
r  e.  ( Atoms `  K ) )
32 simp2rl 1130 . . . . . . . . . . . 12  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  /\  (
( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  /\  ( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )  -> 
q  =/=  r )
33 simp3ll 1132 . . . . . . . . . . . 12  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  /\  (
( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  /\  ( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )  -> 
s  e.  ( Atoms `  K ) )
34 simp3lr 1133 . . . . . . . . . . . 12  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  /\  (
( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  /\  ( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )  -> 
t  e.  ( Atoms `  K ) )
35 simp3rl 1134 . . . . . . . . . . . 12  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  /\  (
( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  /\  ( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )  -> 
s  =/=  t )
36 2llnj.l . . . . . . . . . . . . . 14  |-  .<_  =  ( le `  K )
37 2llnj.p . . . . . . . . . . . . . 14  |-  P  =  ( LPlanes `  K )
3836, 2, 3, 4, 372llnjaN 34852 . . . . . . . . . . . . 13  |-  ( ( ( ( K  e.  HL  /\  W  e.  P )  /\  (
q  e.  ( Atoms `  K )  /\  r  e.  ( Atoms `  K )  /\  q  =/=  r
)  /\  ( s  e.  ( Atoms `  K )  /\  t  e.  ( Atoms `  K )  /\  s  =/=  t ) )  /\  ( ( q 
.\/  r )  .<_  W  /\  ( s  .\/  t )  .<_  W  /\  ( q  .\/  r
)  =/=  ( s 
.\/  t ) ) )  ->  ( (
q  .\/  r )  .\/  ( s  .\/  t
) )  =  W )
3938ex 450 . . . . . . . . . . . 12  |-  ( ( ( K  e.  HL  /\  W  e.  P )  /\  ( q  e.  ( Atoms `  K )  /\  r  e.  ( Atoms `  K )  /\  q  =/=  r )  /\  ( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K )  /\  s  =/=  t ) )  -> 
( ( ( q 
.\/  r )  .<_  W  /\  ( s  .\/  t )  .<_  W  /\  ( q  .\/  r
)  =/=  ( s 
.\/  t ) )  ->  ( ( q 
.\/  r )  .\/  ( s  .\/  t
) )  =  W ) )
4028, 29, 30, 31, 32, 33, 34, 35, 39syl233anc 1355 . . . . . . . . . . 11  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  /\  (
( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  /\  ( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )  -> 
( ( ( q 
.\/  r )  .<_  W  /\  ( s  .\/  t )  .<_  W  /\  ( q  .\/  r
)  =/=  ( s 
.\/  t ) )  ->  ( ( q 
.\/  r )  .\/  ( s  .\/  t
) )  =  W ) )
4127, 40mpd 15 . . . . . . . . . 10  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  /\  (
( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  /\  ( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )  -> 
( ( q  .\/  r )  .\/  (
s  .\/  t )
)  =  W )
4217, 41eqtrd 2656 . . . . . . . . 9  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  (
q  .\/  r )
) )  /\  (
( s  e.  (
Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  /\  ( s  =/=  t  /\  Y  =  (
s  .\/  t )
) ) )  -> 
( X  .\/  Y
)  =  W )
43423exp 1264 . . . . . . . 8  |-  ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  ->  (
( ( q  e.  ( Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  /\  ( q  =/=  r  /\  X  =  ( q  .\/  r
) ) )  -> 
( ( ( s  e.  ( Atoms `  K
)  /\  t  e.  ( Atoms `  K )
)  /\  ( s  =/=  t  /\  Y  =  ( s  .\/  t
) ) )  -> 
( X  .\/  Y
)  =  W ) ) )
44433impib 1262 . . . . . . 7  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
q  e.  ( Atoms `  K )  /\  r  e.  ( Atoms `  K )
)  /\  ( q  =/=  r  /\  X  =  ( q  .\/  r
) ) )  -> 
( ( ( s  e.  ( Atoms `  K
)  /\  t  e.  ( Atoms `  K )
)  /\  ( s  =/=  t  /\  Y  =  ( s  .\/  t
) ) )  -> 
( X  .\/  Y
)  =  W ) )
4544expd 452 . . . . . 6  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
q  e.  ( Atoms `  K )  /\  r  e.  ( Atoms `  K )
)  /\  ( q  =/=  r  /\  X  =  ( q  .\/  r
) ) )  -> 
( ( s  e.  ( Atoms `  K )  /\  t  e.  ( Atoms `  K ) )  ->  ( ( s  =/=  t  /\  Y  =  ( s  .\/  t ) )  -> 
( X  .\/  Y
)  =  W ) ) )
4645rexlimdvv 3037 . . . . 5  |-  ( ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  /\  (
q  e.  ( Atoms `  K )  /\  r  e.  ( Atoms `  K )
)  /\  ( q  =/=  r  /\  X  =  ( q  .\/  r
) ) )  -> 
( E. s  e.  ( Atoms `  K ) E. t  e.  ( Atoms `  K ) ( s  =/=  t  /\  Y  =  ( s  .\/  t ) )  -> 
( X  .\/  Y
)  =  W ) )
47463exp 1264 . . . 4  |-  ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  ->  (
( q  e.  (
Atoms `  K )  /\  r  e.  ( Atoms `  K ) )  -> 
( ( q  =/=  r  /\  X  =  ( q  .\/  r
) )  ->  ( E. s  e.  ( Atoms `  K ) E. t  e.  ( Atoms `  K ) ( s  =/=  t  /\  Y  =  ( s  .\/  t ) )  -> 
( X  .\/  Y
)  =  W ) ) ) )
4847rexlimdvv 3037 . . 3  |-  ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  ->  ( E. q  e.  ( Atoms `  K ) E. r  e.  ( Atoms `  K ) ( q  =/=  r  /\  X  =  ( q  .\/  r ) )  -> 
( E. s  e.  ( Atoms `  K ) E. t  e.  ( Atoms `  K ) ( s  =/=  t  /\  Y  =  ( s  .\/  t ) )  -> 
( X  .\/  Y
)  =  W ) ) )
4948impd 447 . 2  |-  ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  ->  (
( E. q  e.  ( Atoms `  K ) E. r  e.  ( Atoms `  K ) ( q  =/=  r  /\  X  =  ( q  .\/  r ) )  /\  E. s  e.  ( Atoms `  K ) E. t  e.  ( Atoms `  K )
( s  =/=  t  /\  Y  =  (
s  .\/  t )
) )  ->  ( X  .\/  Y )  =  W ) )
5014, 49mpd 15 1  |-  ( ( K  e.  HL  /\  ( X  e.  N  /\  Y  e.  N  /\  W  e.  P
)  /\  ( X  .<_  W  /\  Y  .<_  W  /\  X  =/=  Y
) )  ->  ( X  .\/  Y )  =  W )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    <-> wb 196    /\ wa 384    /\ w3a 1037    = wceq 1483    e. wcel 1990    =/= wne 2794   E.wrex 2913   class class class wbr 4653   ` cfv 5888  (class class class)co 6650   Basecbs 15857   lecple 15948   joincjn 16944   Atomscatm 34550   HLchlt 34637   LLinesclln 34777   LPlanesclpl 34778
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
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  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-ral 2917  df-rex 2918  df-reu 2919  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-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  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-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-riota 6611  df-ov 6653  df-oprab 6654  df-preset 16928  df-poset 16946  df-plt 16958  df-lub 16974  df-glb 16975  df-join 16976  df-meet 16977  df-p0 17039  df-lat 17046  df-clat 17108  df-oposet 34463  df-ol 34465  df-oml 34466  df-covers 34553  df-ats 34554  df-atl 34585  df-cvlat 34609  df-hlat 34638  df-llines 34784  df-lplanes 34785
This theorem is referenced by:  2llnm2N  34854
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