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Theorem 4atexlemex2 30187
Description: Lemma for 4atexlem7 30191. Show that when  C  =/=  S,  C satisfies the existence condition of the consequent. (Contributed by NM, 25-Nov-2012.)
Hypotheses
Ref Expression
4thatlem.ph  |-  ( ph  <->  ( ( ( K  e.  HL  /\  W  e.  H )  /\  ( P  e.  A  /\  -.  P  .<_  W )  /\  ( Q  e.  A  /\  -.  Q  .<_  W ) )  /\  ( S  e.  A  /\  ( R  e.  A  /\  -.  R  .<_  W  /\  ( P  .\/  R )  =  ( Q  .\/  R ) )  /\  ( T  e.  A  /\  ( U  .\/  T )  =  ( V  .\/  T ) ) )  /\  ( P  =/=  Q  /\  -.  S  .<_  ( P 
.\/  Q ) ) ) )
4thatlem0.l  |-  .<_  =  ( le `  K )
4thatlem0.j  |-  .\/  =  ( join `  K )
4thatlem0.m  |-  ./\  =  ( meet `  K )
4thatlem0.a  |-  A  =  ( Atoms `  K )
4thatlem0.h  |-  H  =  ( LHyp `  K
)
4thatlem0.u  |-  U  =  ( ( P  .\/  Q )  ./\  W )
4thatlem0.v  |-  V  =  ( ( P  .\/  S )  ./\  W )
4thatlem0.c  |-  C  =  ( ( Q  .\/  T )  ./\  ( P  .\/  S ) )
Assertion
Ref Expression
4atexlemex2  |-  ( (
ph  /\  C  =/=  S )  ->  E. z  e.  A  ( -.  z  .<_  W  /\  ( P  .\/  z )  =  ( S  .\/  z
) ) )
Distinct variable groups:    z, A    z, C    z,  .\/    z,  .<_    z, P    z, S    z, W
Allowed substitution hints:    ph( z)    Q( z)    R( z)    T( z)    U( z)    H( z)    K( z)   
./\ ( z)    V( z)

Proof of Theorem 4atexlemex2
StepHypRef Expression
1 4thatlem.ph . . . 4  |-  ( ph  <->  ( ( ( K  e.  HL  /\  W  e.  H )  /\  ( P  e.  A  /\  -.  P  .<_  W )  /\  ( Q  e.  A  /\  -.  Q  .<_  W ) )  /\  ( S  e.  A  /\  ( R  e.  A  /\  -.  R  .<_  W  /\  ( P  .\/  R )  =  ( Q  .\/  R ) )  /\  ( T  e.  A  /\  ( U  .\/  T )  =  ( V  .\/  T ) ) )  /\  ( P  =/=  Q  /\  -.  S  .<_  ( P 
.\/  Q ) ) ) )
2 4thatlem0.l . . . 4  |-  .<_  =  ( le `  K )
3 4thatlem0.j . . . 4  |-  .\/  =  ( join `  K )
4 4thatlem0.m . . . 4  |-  ./\  =  ( meet `  K )
5 4thatlem0.a . . . 4  |-  A  =  ( Atoms `  K )
6 4thatlem0.h . . . 4  |-  H  =  ( LHyp `  K
)
7 4thatlem0.u . . . 4  |-  U  =  ( ( P  .\/  Q )  ./\  W )
8 4thatlem0.v . . . 4  |-  V  =  ( ( P  .\/  S )  ./\  W )
9 4thatlem0.c . . . 4  |-  C  =  ( ( Q  .\/  T )  ./\  ( P  .\/  S ) )
101, 2, 3, 4, 5, 6, 7, 8, 94atexlemc 30185 . . 3  |-  ( ph  ->  C  e.  A )
1110adantr 452 . 2  |-  ( (
ph  /\  C  =/=  S )  ->  C  e.  A )
121, 2, 3, 4, 5, 6, 7, 8, 94atexlemnclw 30186 . . 3  |-  ( ph  ->  -.  C  .<_  W )
1312adantr 452 . 2  |-  ( (
ph  /\  C  =/=  S )  ->  -.  C  .<_  W )
141, 2, 3, 4, 5, 6, 7, 84atexlemntlpq 30184 . . . . 5  |-  ( ph  ->  -.  T  .<_  ( P 
.\/  Q ) )
15 id 20 . . . . . . . . . . 11  |-  ( C  =  P  ->  C  =  P )
169, 15syl5eqr 2435 . . . . . . . . . 10  |-  ( C  =  P  ->  (
( Q  .\/  T
)  ./\  ( P  .\/  S ) )  =  P )
1716adantl 453 . . . . . . . . 9  |-  ( (
ph  /\  C  =  P )  ->  (
( Q  .\/  T
)  ./\  ( P  .\/  S ) )  =  P )
1814atexlemkl 30173 . . . . . . . . . . . 12  |-  ( ph  ->  K  e.  Lat )
191, 3, 54atexlemqtb 30177 . . . . . . . . . . . 12  |-  ( ph  ->  ( Q  .\/  T
)  e.  ( Base `  K ) )
201, 3, 54atexlempsb 30176 . . . . . . . . . . . 12  |-  ( ph  ->  ( P  .\/  S
)  e.  ( Base `  K ) )
21 eqid 2389 . . . . . . . . . . . . 13  |-  ( Base `  K )  =  (
Base `  K )
2221, 2, 4latmle1 14434 . . . . . . . . . . . 12  |-  ( ( K  e.  Lat  /\  ( Q  .\/  T )  e.  ( Base `  K
)  /\  ( P  .\/  S )  e.  (
Base `  K )
)  ->  ( ( Q  .\/  T )  ./\  ( P  .\/  S ) )  .<_  ( Q  .\/  T ) )
2318, 19, 20, 22syl3anc 1184 . . . . . . . . . . 11  |-  ( ph  ->  ( ( Q  .\/  T )  ./\  ( P  .\/  S ) )  .<_  ( Q  .\/  T ) )
2414atexlemk 30163 . . . . . . . . . . . 12  |-  ( ph  ->  K  e.  HL )
2514atexlemq 30167 . . . . . . . . . . . 12  |-  ( ph  ->  Q  e.  A )
2614atexlemt 30169 . . . . . . . . . . . 12  |-  ( ph  ->  T  e.  A )
273, 5hlatjcom 29484 . . . . . . . . . . . 12  |-  ( ( K  e.  HL  /\  Q  e.  A  /\  T  e.  A )  ->  ( Q  .\/  T
)  =  ( T 
.\/  Q ) )
2824, 25, 26, 27syl3anc 1184 . . . . . . . . . . 11  |-  ( ph  ->  ( Q  .\/  T
)  =  ( T 
.\/  Q ) )
2923, 28breqtrd 4179 . . . . . . . . . 10  |-  ( ph  ->  ( ( Q  .\/  T )  ./\  ( P  .\/  S ) )  .<_  ( T  .\/  Q ) )
3029adantr 452 . . . . . . . . 9  |-  ( (
ph  /\  C  =  P )  ->  (
( Q  .\/  T
)  ./\  ( P  .\/  S ) )  .<_  ( T  .\/  Q ) )
3117, 30eqbrtrrd 4177 . . . . . . . 8  |-  ( (
ph  /\  C  =  P )  ->  P  .<_  ( T  .\/  Q
) )
3214atexlemkc 30174 . . . . . . . . . 10  |-  ( ph  ->  K  e.  CvLat )
3314atexlemp 30166 . . . . . . . . . 10  |-  ( ph  ->  P  e.  A )
3414atexlempnq 30171 . . . . . . . . . 10  |-  ( ph  ->  P  =/=  Q )
352, 3, 5cvlatexch2 29454 . . . . . . . . . 10  |-  ( ( K  e.  CvLat  /\  ( P  e.  A  /\  T  e.  A  /\  Q  e.  A )  /\  P  =/=  Q
)  ->  ( P  .<_  ( T  .\/  Q
)  ->  T  .<_  ( P  .\/  Q ) ) )
3632, 33, 26, 25, 34, 35syl131anc 1197 . . . . . . . . 9  |-  ( ph  ->  ( P  .<_  ( T 
.\/  Q )  ->  T  .<_  ( P  .\/  Q ) ) )
3736adantr 452 . . . . . . . 8  |-  ( (
ph  /\  C  =  P )  ->  ( P  .<_  ( T  .\/  Q )  ->  T  .<_  ( P  .\/  Q ) ) )
3831, 37mpd 15 . . . . . . 7  |-  ( (
ph  /\  C  =  P )  ->  T  .<_  ( P  .\/  Q
) )
3938ex 424 . . . . . 6  |-  ( ph  ->  ( C  =  P  ->  T  .<_  ( P 
.\/  Q ) ) )
4039necon3bd 2589 . . . . 5  |-  ( ph  ->  ( -.  T  .<_  ( P  .\/  Q )  ->  C  =/=  P
) )
4114, 40mpd 15 . . . 4  |-  ( ph  ->  C  =/=  P )
4241adantr 452 . . 3  |-  ( (
ph  /\  C  =/=  S )  ->  C  =/=  P )
43 simpr 448 . . 3  |-  ( (
ph  /\  C  =/=  S )  ->  C  =/=  S )
4421, 2, 4latmle2 14435 . . . . . 6  |-  ( ( K  e.  Lat  /\  ( Q  .\/  T )  e.  ( Base `  K
)  /\  ( P  .\/  S )  e.  (
Base `  K )
)  ->  ( ( Q  .\/  T )  ./\  ( P  .\/  S ) )  .<_  ( P  .\/  S ) )
4518, 19, 20, 44syl3anc 1184 . . . . 5  |-  ( ph  ->  ( ( Q  .\/  T )  ./\  ( P  .\/  S ) )  .<_  ( P  .\/  S ) )
469, 45syl5eqbr 4188 . . . 4  |-  ( ph  ->  C  .<_  ( P  .\/  S ) )
4746adantr 452 . . 3  |-  ( (
ph  /\  C  =/=  S )  ->  C  .<_  ( P  .\/  S ) )
4814atexlems 30168 . . . . 5  |-  ( ph  ->  S  e.  A )
491, 2, 3, 54atexlempns 30178 . . . . 5  |-  ( ph  ->  P  =/=  S )
505, 2, 3cvlsupr2 29460 . . . . 5  |-  ( ( K  e.  CvLat  /\  ( P  e.  A  /\  S  e.  A  /\  C  e.  A )  /\  P  =/=  S
)  ->  ( ( P  .\/  C )  =  ( S  .\/  C
)  <->  ( C  =/= 
P  /\  C  =/=  S  /\  C  .<_  ( P 
.\/  S ) ) ) )
5132, 33, 48, 10, 49, 50syl131anc 1197 . . . 4  |-  ( ph  ->  ( ( P  .\/  C )  =  ( S 
.\/  C )  <->  ( C  =/=  P  /\  C  =/= 
S  /\  C  .<_  ( P  .\/  S ) ) ) )
5251adantr 452 . . 3  |-  ( (
ph  /\  C  =/=  S )  ->  ( ( P  .\/  C )  =  ( S  .\/  C
)  <->  ( C  =/= 
P  /\  C  =/=  S  /\  C  .<_  ( P 
.\/  S ) ) ) )
5342, 43, 47, 52mpbir3and 1137 . 2  |-  ( (
ph  /\  C  =/=  S )  ->  ( P  .\/  C )  =  ( S  .\/  C ) )
54 breq1 4158 . . . . 5  |-  ( z  =  C  ->  (
z  .<_  W  <->  C  .<_  W ) )
5554notbid 286 . . . 4  |-  ( z  =  C  ->  ( -.  z  .<_  W  <->  -.  C  .<_  W ) )
56 oveq2 6030 . . . . 5  |-  ( z  =  C  ->  ( P  .\/  z )  =  ( P  .\/  C
) )
57 oveq2 6030 . . . . 5  |-  ( z  =  C  ->  ( S  .\/  z )  =  ( S  .\/  C
) )
5856, 57eqeq12d 2403 . . . 4  |-  ( z  =  C  ->  (
( P  .\/  z
)  =  ( S 
.\/  z )  <->  ( P  .\/  C )  =  ( S  .\/  C ) ) )
5955, 58anbi12d 692 . . 3  |-  ( z  =  C  ->  (
( -.  z  .<_  W  /\  ( P  .\/  z )  =  ( S  .\/  z ) )  <->  ( -.  C  .<_  W  /\  ( P 
.\/  C )  =  ( S  .\/  C
) ) ) )
6059rspcev 2997 . 2  |-  ( ( C  e.  A  /\  ( -.  C  .<_  W  /\  ( P  .\/  C )  =  ( S 
.\/  C ) ) )  ->  E. z  e.  A  ( -.  z  .<_  W  /\  ( P  .\/  z )  =  ( S  .\/  z
) ) )
6111, 13, 53, 60syl12anc 1182 1  |-  ( (
ph  /\  C  =/=  S )  ->  E. z  e.  A  ( -.  z  .<_  W  /\  ( P  .\/  z )  =  ( S  .\/  z
) ) )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    <-> wb 177    /\ wa 359    /\ w3a 936    = wceq 1649    e. wcel 1717    =/= wne 2552   E.wrex 2652   class class class wbr 4155   ` cfv 5396  (class class class)co 6022   Basecbs 13398   lecple 13465   joincjn 14330   meetcmee 14331   Latclat 14403   Atomscatm 29380   CvLatclc 29382   HLchlt 29467   LHypclh 30100
This theorem is referenced by:  4atexlemex4  30189  4atexlemex6  30190
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1552  ax-5 1563  ax-17 1623  ax-9 1661  ax-8 1682  ax-13 1719  ax-14 1721  ax-6 1736  ax-7 1741  ax-11 1753  ax-12 1939  ax-ext 2370  ax-rep 4263  ax-sep 4273  ax-nul 4281  ax-pow 4320  ax-pr 4346  ax-un 4643
This theorem depends on definitions:  df-bi 178  df-or 360  df-an 361  df-3an 938  df-tru 1325  df-ex 1548  df-nf 1551  df-sb 1656  df-eu 2244  df-mo 2245  df-clab 2376  df-cleq 2382  df-clel 2385  df-nfc 2514  df-ne 2554  df-nel 2555  df-ral 2656  df-rex 2657  df-reu 2658  df-rab 2660  df-v 2903  df-sbc 3107  df-csb 3197  df-dif 3268  df-un 3270  df-in 3272  df-ss 3279  df-nul 3574  df-if 3685  df-pw 3746  df-sn 3765  df-pr 3766  df-op 3768  df-uni 3960  df-iun 4039  df-br 4156  df-opab 4210  df-mpt 4211  df-id 4441  df-xp 4826  df-rel 4827  df-cnv 4828  df-co 4829  df-dm 4830  df-rn 4831  df-res 4832  df-ima 4833  df-iota 5360  df-fun 5398  df-fn 5399  df-f 5400  df-f1 5401  df-fo 5402  df-f1o 5403  df-fv 5404  df-ov 6025  df-oprab 6026  df-mpt2 6027  df-1st 6290  df-2nd 6291  df-undef 6481  df-riota 6487  df-poset 14332  df-plt 14344  df-lub 14360  df-glb 14361  df-join 14362  df-meet 14363  df-p0 14397  df-p1 14398  df-lat 14404  df-clat 14466  df-oposet 29293  df-ol 29295  df-oml 29296  df-covers 29383  df-ats 29384  df-atl 29415  df-cvlat 29439  df-hlat 29468  df-llines 29614  df-lplanes 29615  df-lhyp 30104
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