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Theorem dalem43 34388
Description: Lemma for dath 34409. Planes  G H I and  Y are different. (Contributed by NM, 8-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
) ) ) )
dalem38.m  |-  ./\  =  ( meet `  K )
dalem38.o  |-  O  =  ( LPlanes `  K )
dalem38.y  |-  Y  =  ( ( P  .\/  Q )  .\/  R )
dalem38.z  |-  Z  =  ( ( S  .\/  T )  .\/  U )
dalem38.g  |-  G  =  ( ( c  .\/  P )  ./\  ( d  .\/  S ) )
dalem38.h  |-  H  =  ( ( c  .\/  Q )  ./\  ( d  .\/  T ) )
dalem38.i  |-  I  =  ( ( c  .\/  R )  ./\  ( d  .\/  U ) )
Assertion
Ref Expression
dalem43  |-  ( (
ph  /\  Y  =  Z  /\  ps )  -> 
( ( G  .\/  H )  .\/  I )  =/=  Y )

Proof of Theorem dalem43
StepHypRef Expression
1 dalem.ph . . . . 5  |-  ( 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 ) ) ) ) )
21dalemkelat 34297 . . . 4  |-  ( ph  ->  K  e.  Lat )
323ad2ant1 1012 . . 3  |-  ( (
ph  /\  Y  =  Z  /\  ps )  ->  K  e.  Lat )
41dalemkehl 34296 . . . . 5  |-  ( ph  ->  K  e.  HL )
543ad2ant1 1012 . . . 4  |-  ( (
ph  /\  Y  =  Z  /\  ps )  ->  K  e.  HL )
6 dalem.l . . . . 5  |-  .<_  =  ( le `  K )
7 dalem.j . . . . 5  |-  .\/  =  ( join `  K )
8 dalem.a . . . . 5  |-  A  =  ( Atoms `  K )
9 dalem.ps . . . . 5  |-  ( ps  <->  ( ( c  e.  A  /\  d  e.  A
)  /\  -.  c  .<_  Y  /\  ( d  =/=  c  /\  -.  d  .<_  Y  /\  C  .<_  ( c  .\/  d
) ) ) )
10 dalem38.m . . . . 5  |-  ./\  =  ( meet `  K )
11 dalem38.o . . . . 5  |-  O  =  ( LPlanes `  K )
12 dalem38.y . . . . 5  |-  Y  =  ( ( P  .\/  Q )  .\/  R )
13 dalem38.z . . . . 5  |-  Z  =  ( ( S  .\/  T )  .\/  U )
14 dalem38.g . . . . 5  |-  G  =  ( ( c  .\/  P )  ./\  ( d  .\/  S ) )
151, 6, 7, 8, 9, 10, 11, 12, 13, 14dalem23 34369 . . . 4  |-  ( (
ph  /\  Y  =  Z  /\  ps )  ->  G  e.  A )
16 dalem38.h . . . . 5  |-  H  =  ( ( c  .\/  Q )  ./\  ( d  .\/  T ) )
171, 6, 7, 8, 9, 10, 11, 12, 13, 16dalem29 34374 . . . 4  |-  ( (
ph  /\  Y  =  Z  /\  ps )  ->  H  e.  A )
18 eqid 2462 . . . . 5  |-  ( Base `  K )  =  (
Base `  K )
1918, 7, 8hlatjcl 34040 . . . 4  |-  ( ( K  e.  HL  /\  G  e.  A  /\  H  e.  A )  ->  ( G  .\/  H
)  e.  ( Base `  K ) )
205, 15, 17, 19syl3anc 1223 . . 3  |-  ( (
ph  /\  Y  =  Z  /\  ps )  -> 
( G  .\/  H
)  e.  ( Base `  K ) )
21 dalem38.i . . . . 5  |-  I  =  ( ( c  .\/  R )  ./\  ( d  .\/  U ) )
221, 6, 7, 8, 9, 10, 11, 12, 13, 21dalem34 34379 . . . 4  |-  ( (
ph  /\  Y  =  Z  /\  ps )  ->  I  e.  A )
2318, 8atbase 33963 . . . 4  |-  ( I  e.  A  ->  I  e.  ( Base `  K
) )
2422, 23syl 16 . . 3  |-  ( (
ph  /\  Y  =  Z  /\  ps )  ->  I  e.  ( Base `  K ) )
2518, 6, 7latlej2 15539 . . 3  |-  ( ( K  e.  Lat  /\  ( G  .\/  H )  e.  ( Base `  K
)  /\  I  e.  ( Base `  K )
)  ->  I  .<_  ( ( G  .\/  H
)  .\/  I )
)
263, 20, 24, 25syl3anc 1223 . 2  |-  ( (
ph  /\  Y  =  Z  /\  ps )  ->  I  .<_  ( ( G 
.\/  H )  .\/  I ) )
271, 6, 7, 8, 9, 10, 11, 12, 13, 21dalem35 34380 . 2  |-  ( (
ph  /\  Y  =  Z  /\  ps )  ->  -.  I  .<_  Y )
28 nbrne1 4459 . 2  |-  ( ( I  .<_  ( ( G  .\/  H )  .\/  I )  /\  -.  I  .<_  Y )  -> 
( ( G  .\/  H )  .\/  I )  =/=  Y )
2926, 27, 28syl2anc 661 1  |-  ( (
ph  /\  Y  =  Z  /\  ps )  -> 
( ( G  .\/  H )  .\/  I )  =/=  Y )
Colors of variables: wff setvar class
Syntax hints:   -. wn 3    -> wi 4    <-> wb 184    /\ wa 369    /\ w3a 968    = wceq 1374    e. wcel 1762    =/= wne 2657   class class class wbr 4442   ` cfv 5581  (class class class)co 6277   Basecbs 14481   lecple 14553   joincjn 15422   meetcmee 15423   Latclat 15523   Atomscatm 33937   HLchlt 34024   LPlanesclpl 34165
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1596  ax-4 1607  ax-5 1675  ax-6 1714  ax-7 1734  ax-8 1764  ax-9 1766  ax-10 1781  ax-11 1786  ax-12 1798  ax-13 1963  ax-ext 2440  ax-rep 4553  ax-sep 4563  ax-nul 4571  ax-pow 4620  ax-pr 4681  ax-un 6569
This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371  df-3an 970  df-tru 1377  df-ex 1592  df-nf 1595  df-sb 1707  df-eu 2274  df-mo 2275  df-clab 2448  df-cleq 2454  df-clel 2457  df-nfc 2612  df-ne 2659  df-ral 2814  df-rex 2815  df-reu 2816  df-rab 2818  df-v 3110  df-sbc 3327  df-csb 3431  df-dif 3474  df-un 3476  df-in 3478  df-ss 3485  df-nul 3781  df-if 3935  df-pw 4007  df-sn 4023  df-pr 4025  df-op 4029  df-uni 4241  df-iun 4322  df-br 4443  df-opab 4501  df-mpt 4502  df-id 4790  df-xp 5000  df-rel 5001  df-cnv 5002  df-co 5003  df-dm 5004  df-rn 5005  df-res 5006  df-ima 5007  df-iota 5544  df-fun 5583  df-fn 5584  df-f 5585  df-f1 5586  df-fo 5587  df-f1o 5588  df-fv 5589  df-riota 6238  df-ov 6280  df-oprab 6281  df-poset 15424  df-plt 15436  df-lub 15452  df-glb 15453  df-join 15454  df-meet 15455  df-p0 15517  df-lat 15524  df-clat 15586  df-oposet 33850  df-ol 33852  df-oml 33853  df-covers 33940  df-ats 33941  df-atl 33972  df-cvlat 33996  df-hlat 34025  df-llines 34171  df-lplanes 34172
This theorem is referenced by:  dalem44  34389  dalem51  34396
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