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Theorem dalemsly 30389
Description: Lemma for dath 30470. Frequently-used utility lemma. (Contributed by NM, 15-Aug-2012.)
Hypotheses
Ref Expression
dalema.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 ) ) ) ) )
dalemc.l  |-  .<_  =  ( le `  K )
dalemc.j  |-  .\/  =  ( join `  K )
dalemc.a  |-  A  =  ( Atoms `  K )
dalemsly.z  |-  Z  =  ( ( S  .\/  T )  .\/  U )
Assertion
Ref Expression
dalemsly  |-  ( (
ph  /\  Y  =  Z )  ->  S  .<_  Y )

Proof of Theorem dalemsly
StepHypRef Expression
1 dalema.ph . . . . . . 7  |-  ( 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 30358 . . . . . 6  |-  ( ph  ->  K  e.  Lat )
3 dalemc.a . . . . . . 7  |-  A  =  ( Atoms `  K )
41, 3dalemseb 30376 . . . . . 6  |-  ( ph  ->  S  e.  ( Base `  K ) )
5 dalemc.j . . . . . . 7  |-  .\/  =  ( join `  K )
61, 5, 3dalemtjueb 30381 . . . . . 6  |-  ( ph  ->  ( T  .\/  U
)  e.  ( Base `  K ) )
7 eqid 2435 . . . . . . 7  |-  ( Base `  K )  =  (
Base `  K )
8 dalemc.l . . . . . . 7  |-  .<_  =  ( le `  K )
97, 8, 5latlej1 14481 . . . . . 6  |-  ( ( K  e.  Lat  /\  S  e.  ( Base `  K )  /\  ( T  .\/  U )  e.  ( Base `  K
) )  ->  S  .<_  ( S  .\/  ( T  .\/  U ) ) )
102, 4, 6, 9syl3anc 1184 . . . . 5  |-  ( ph  ->  S  .<_  ( S  .\/  ( T  .\/  U
) ) )
111dalemkehl 30357 . . . . . 6  |-  ( ph  ->  K  e.  HL )
121dalemsea 30363 . . . . . 6  |-  ( ph  ->  S  e.  A )
131dalemtea 30364 . . . . . 6  |-  ( ph  ->  T  e.  A )
141dalemuea 30365 . . . . . 6  |-  ( ph  ->  U  e.  A )
155, 3hlatjass 30104 . . . . . 6  |-  ( ( K  e.  HL  /\  ( S  e.  A  /\  T  e.  A  /\  U  e.  A
) )  ->  (
( S  .\/  T
)  .\/  U )  =  ( S  .\/  ( T  .\/  U ) ) )
1611, 12, 13, 14, 15syl13anc 1186 . . . . 5  |-  ( ph  ->  ( ( S  .\/  T )  .\/  U )  =  ( S  .\/  ( T  .\/  U ) ) )
1710, 16breqtrrd 4230 . . . 4  |-  ( ph  ->  S  .<_  ( ( S  .\/  T )  .\/  U ) )
18 dalemsly.z . . . 4  |-  Z  =  ( ( S  .\/  T )  .\/  U )
1917, 18syl6breqr 4244 . . 3  |-  ( ph  ->  S  .<_  Z )
2019adantr 452 . 2  |-  ( (
ph  /\  Y  =  Z )  ->  S  .<_  Z )
21 simpr 448 . 2  |-  ( (
ph  /\  Y  =  Z )  ->  Y  =  Z )
2220, 21breqtrrd 4230 1  |-  ( (
ph  /\  Y  =  Z )  ->  S  .<_  Y )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    <-> wb 177    /\ wa 359    /\ w3a 936    = wceq 1652    e. wcel 1725   class class class wbr 4204   ` cfv 5446  (class class class)co 6073   Basecbs 13461   lecple 13528   joincjn 14393   Latclat 14466   Atomscatm 29998   HLchlt 30085
This theorem is referenced by:  dalem21  30428  dalem23  30430  dalem24  30431  dalem25  30432
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1555  ax-5 1566  ax-17 1626  ax-9 1666  ax-8 1687  ax-13 1727  ax-14 1729  ax-6 1744  ax-7 1749  ax-11 1761  ax-12 1950  ax-ext 2416  ax-rep 4312  ax-sep 4322  ax-nul 4330  ax-pow 4369  ax-pr 4395  ax-un 4693
This theorem depends on definitions:  df-bi 178  df-or 360  df-an 361  df-3an 938  df-tru 1328  df-ex 1551  df-nf 1554  df-sb 1659  df-eu 2284  df-mo 2285  df-clab 2422  df-cleq 2428  df-clel 2431  df-nfc 2560  df-ne 2600  df-nel 2601  df-ral 2702  df-rex 2703  df-reu 2704  df-rab 2706  df-v 2950  df-sbc 3154  df-csb 3244  df-dif 3315  df-un 3317  df-in 3319  df-ss 3326  df-nul 3621  df-if 3732  df-pw 3793  df-sn 3812  df-pr 3813  df-op 3815  df-uni 4008  df-iun 4087  df-br 4205  df-opab 4259  df-mpt 4260  df-id 4490  df-xp 4876  df-rel 4877  df-cnv 4878  df-co 4879  df-dm 4880  df-rn 4881  df-res 4882  df-ima 4883  df-iota 5410  df-fun 5448  df-fn 5449  df-f 5450  df-f1 5451  df-fo 5452  df-f1o 5453  df-fv 5454  df-ov 6076  df-oprab 6077  df-mpt2 6078  df-1st 6341  df-2nd 6342  df-undef 6535  df-riota 6541  df-poset 14395  df-lub 14423  df-join 14425  df-lat 14467  df-ats 30002  df-atl 30033  df-cvlat 30057  df-hlat 30086
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