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Theorem dalem61 35019
Description: Lemma for dath 35022. Show that atoms  D,  E, and  F lie on the same line (axis of perspectivity). Eliminate hypotheses containing dummy atoms  c and  d. (Contributed by NM, 11-Aug-2012.)
Hypotheses
Ref Expression
dalem.ph  |-  ( ph  <->  ( ( ( K  e.  HL  /\  C  e.  ( Base `  K
) )  /\  ( P  e.  A  /\  Q  e.  A  /\  R  e.  A )  /\  ( S  e.  A  /\  T  e.  A  /\  U  e.  A
) )  /\  ( Y  e.  O  /\  Z  e.  O )  /\  ( ( -.  C  .<_  ( P  .\/  Q
)  /\  -.  C  .<_  ( Q  .\/  R
)  /\  -.  C  .<_  ( R  .\/  P
) )  /\  ( -.  C  .<_  ( S 
.\/  T )  /\  -.  C  .<_  ( T 
.\/  U )  /\  -.  C  .<_  ( U 
.\/  S ) )  /\  ( C  .<_  ( P  .\/  S )  /\  C  .<_  ( Q 
.\/  T )  /\  C  .<_  ( R  .\/  U ) ) ) ) )
dalem.l  |-  .<_  =  ( le `  K )
dalem.j  |-  .\/  =  ( join `  K )
dalem.a  |-  A  =  ( Atoms `  K )
dalem.ps  |-  ( ps  <->  ( ( c  e.  A  /\  d  e.  A
)  /\  -.  c  .<_  Y  /\  ( d  =/=  c  /\  -.  d  .<_  Y  /\  C  .<_  ( c  .\/  d
) ) ) )
dalem61.m  |-  ./\  =  ( meet `  K )
dalem61.o  |-  O  =  ( LPlanes `  K )
dalem61.y  |-  Y  =  ( ( P  .\/  Q )  .\/  R )
dalem61.z  |-  Z  =  ( ( S  .\/  T )  .\/  U )
dalem61.d  |-  D  =  ( ( P  .\/  Q )  ./\  ( S  .\/  T ) )
dalem61.e  |-  E  =  ( ( Q  .\/  R )  ./\  ( T  .\/  U ) )
dalem61.f  |-  F  =  ( ( R  .\/  P )  ./\  ( U  .\/  S ) )
Assertion
Ref Expression
dalem61  |-  ( (
ph  /\  Y  =  Z  /\  ps )  ->  F  .<_  ( D  .\/  E ) )

Proof of Theorem dalem61
StepHypRef Expression
1 dalem.ph . . 3  |-  ( ph  <->  ( ( ( K  e.  HL  /\  C  e.  ( Base `  K
) )  /\  ( P  e.  A  /\  Q  e.  A  /\  R  e.  A )  /\  ( S  e.  A  /\  T  e.  A  /\  U  e.  A
) )  /\  ( Y  e.  O  /\  Z  e.  O )  /\  ( ( -.  C  .<_  ( P  .\/  Q
)  /\  -.  C  .<_  ( Q  .\/  R
)  /\  -.  C  .<_  ( R  .\/  P
) )  /\  ( -.  C  .<_  ( S 
.\/  T )  /\  -.  C  .<_  ( T 
.\/  U )  /\  -.  C  .<_  ( U 
.\/  S ) )  /\  ( C  .<_  ( P  .\/  S )  /\  C  .<_  ( Q 
.\/  T )  /\  C  .<_  ( R  .\/  U ) ) ) ) )
2 dalem.l . . 3  |-  .<_  =  ( le `  K )
3 dalem.j . . 3  |-  .\/  =  ( join `  K )
4 dalem.a . . 3  |-  A  =  ( Atoms `  K )
5 dalem.ps . . 3  |-  ( ps  <->  ( ( c  e.  A  /\  d  e.  A
)  /\  -.  c  .<_  Y  /\  ( d  =/=  c  /\  -.  d  .<_  Y  /\  C  .<_  ( c  .\/  d
) ) ) )
6 dalem61.m . . 3  |-  ./\  =  ( meet `  K )
7 dalem61.o . . 3  |-  O  =  ( LPlanes `  K )
8 dalem61.y . . 3  |-  Y  =  ( ( P  .\/  Q )  .\/  R )
9 dalem61.z . . 3  |-  Z  =  ( ( S  .\/  T )  .\/  U )
10 dalem61.f . . 3  |-  F  =  ( ( R  .\/  P )  ./\  ( U  .\/  S ) )
11 eqid 2622 . . 3  |-  ( ( c  .\/  P ) 
./\  ( d  .\/  S ) )  =  ( ( c  .\/  P
)  ./\  ( d  .\/  S ) )
12 eqid 2622 . . 3  |-  ( ( c  .\/  Q ) 
./\  ( d  .\/  T ) )  =  ( ( c  .\/  Q
)  ./\  ( d  .\/  T ) )
13 eqid 2622 . . 3  |-  ( ( c  .\/  R ) 
./\  ( d  .\/  U ) )  =  ( ( c  .\/  R
)  ./\  ( d  .\/  U ) )
14 eqid 2622 . . 3  |-  ( ( ( ( ( c 
.\/  P )  ./\  ( d  .\/  S
) )  .\/  (
( c  .\/  Q
)  ./\  ( d  .\/  T ) ) ) 
.\/  ( ( c 
.\/  R )  ./\  ( d  .\/  U
) ) )  ./\  Y )  =  ( ( ( ( ( c 
.\/  P )  ./\  ( d  .\/  S
) )  .\/  (
( c  .\/  Q
)  ./\  ( d  .\/  T ) ) ) 
.\/  ( ( c 
.\/  R )  ./\  ( d  .\/  U
) ) )  ./\  Y )
151, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14dalem59 35017 . 2  |-  ( (
ph  /\  Y  =  Z  /\  ps )  ->  F  .<_  ( ( ( ( ( c  .\/  P )  ./\  ( d  .\/  S ) )  .\/  ( ( c  .\/  Q )  ./\  ( d  .\/  T ) ) ) 
.\/  ( ( c 
.\/  R )  ./\  ( d  .\/  U
) ) )  ./\  Y ) )
16 dalem61.d . . 3  |-  D  =  ( ( P  .\/  Q )  ./\  ( S  .\/  T ) )
17 dalem61.e . . 3  |-  E  =  ( ( Q  .\/  R )  ./\  ( T  .\/  U ) )
181, 2, 3, 4, 5, 6, 7, 8, 9, 16, 17, 11, 12, 13, 14dalem60 35018 . 2  |-  ( (
ph  /\  Y  =  Z  /\  ps )  -> 
( D  .\/  E
)  =  ( ( ( ( ( c 
.\/  P )  ./\  ( d  .\/  S
) )  .\/  (
( c  .\/  Q
)  ./\  ( d  .\/  T ) ) ) 
.\/  ( ( c 
.\/  R )  ./\  ( d  .\/  U
) ) )  ./\  Y ) )
1915, 18breqtrrd 4681 1  |-  ( (
ph  /\  Y  =  Z  /\  ps )  ->  F  .<_  ( D  .\/  E ) )
Colors of variables: wff setvar class
Syntax hints:   -. wn 3    -> wi 4    <-> wb 196    /\ wa 384    /\ w3a 1037    = wceq 1483    e. wcel 1990    =/= wne 2794   class class class wbr 4653   ` cfv 5888  (class class class)co 6650   Basecbs 15857   lecple 15948   joincjn 16944   meetcmee 16945   Atomscatm 34550   HLchlt 34637   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-3or 1038  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  df-lvols 34786
This theorem is referenced by:  dalem62  35020
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