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Theorem latj13 16054
Description: Swap 1st and 3rd members of lattice join. (Contributed by NM, 4-Jun-2012.)
Hypotheses
Ref Expression
latjass.b  |-  B  =  ( Base `  K
)
latjass.j  |-  .\/  =  ( join `  K )
Assertion
Ref Expression
latj13  |-  ( ( K  e.  Lat  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  B
) )  ->  ( X  .\/  ( Y  .\/  Z ) )  =  ( Z  .\/  ( Y 
.\/  X ) ) )

Proof of Theorem latj13
StepHypRef Expression
1 simpl 457 . . 3  |-  ( ( K  e.  Lat  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  B
) )  ->  K  e.  Lat )
2 simpr2 1006 . . 3  |-  ( ( K  e.  Lat  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  B
) )  ->  Y  e.  B )
3 simpr3 1007 . . 3  |-  ( ( K  e.  Lat  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  B
) )  ->  Z  e.  B )
4 simpr1 1005 . . 3  |-  ( ( K  e.  Lat  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  B
) )  ->  X  e.  B )
5 latjass.b . . . 4  |-  B  =  ( Base `  K
)
6 latjass.j . . . 4  |-  .\/  =  ( join `  K )
75, 6latj32 16053 . . 3  |-  ( ( K  e.  Lat  /\  ( Y  e.  B  /\  Z  e.  B  /\  X  e.  B
) )  ->  (
( Y  .\/  Z
)  .\/  X )  =  ( ( Y 
.\/  X )  .\/  Z ) )
81, 2, 3, 4, 7syl13anc 1234 . 2  |-  ( ( K  e.  Lat  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  B
) )  ->  (
( Y  .\/  Z
)  .\/  X )  =  ( ( Y 
.\/  X )  .\/  Z ) )
95, 6latjcl 16007 . . . 4  |-  ( ( K  e.  Lat  /\  Y  e.  B  /\  Z  e.  B )  ->  ( Y  .\/  Z
)  e.  B )
1093adant3r1 1208 . . 3  |-  ( ( K  e.  Lat  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  B
) )  ->  ( Y  .\/  Z )  e.  B )
115, 6latjcom 16015 . . 3  |-  ( ( K  e.  Lat  /\  X  e.  B  /\  ( Y  .\/  Z )  e.  B )  -> 
( X  .\/  ( Y  .\/  Z ) )  =  ( ( Y 
.\/  Z )  .\/  X ) )
121, 4, 10, 11syl3anc 1232 . 2  |-  ( ( K  e.  Lat  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  B
) )  ->  ( X  .\/  ( Y  .\/  Z ) )  =  ( ( Y  .\/  Z
)  .\/  X )
)
135, 6latjcl 16007 . . . 4  |-  ( ( K  e.  Lat  /\  Y  e.  B  /\  X  e.  B )  ->  ( Y  .\/  X
)  e.  B )
141, 2, 4, 13syl3anc 1232 . . 3  |-  ( ( K  e.  Lat  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  B
) )  ->  ( Y  .\/  X )  e.  B )
155, 6latjcom 16015 . . 3  |-  ( ( K  e.  Lat  /\  Z  e.  B  /\  ( Y  .\/  X )  e.  B )  -> 
( Z  .\/  ( Y  .\/  X ) )  =  ( ( Y 
.\/  X )  .\/  Z ) )
161, 3, 14, 15syl3anc 1232 . 2  |-  ( ( K  e.  Lat  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  B
) )  ->  ( Z  .\/  ( Y  .\/  X ) )  =  ( ( Y  .\/  X
)  .\/  Z )
)
178, 12, 163eqtr4d 2455 1  |-  ( ( K  e.  Lat  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  B
) )  ->  ( X  .\/  ( Y  .\/  Z ) )  =  ( Z  .\/  ( Y 
.\/  X ) ) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    /\ wa 369    /\ w3a 976    = wceq 1407    e. wcel 1844   ` cfv 5571  (class class class)co 6280   Basecbs 14843   joincjn 15899   Latclat 16001
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1641  ax-4 1654  ax-5 1727  ax-6 1773  ax-7 1816  ax-8 1846  ax-9 1848  ax-10 1863  ax-11 1868  ax-12 1880  ax-13 2028  ax-ext 2382  ax-rep 4509  ax-sep 4519  ax-nul 4527  ax-pow 4574  ax-pr 4632  ax-un 6576
This theorem depends on definitions:  df-bi 187  df-or 370  df-an 371  df-3an 978  df-tru 1410  df-ex 1636  df-nf 1640  df-sb 1766  df-eu 2244  df-mo 2245  df-clab 2390  df-cleq 2396  df-clel 2399  df-nfc 2554  df-ne 2602  df-ral 2761  df-rex 2762  df-reu 2763  df-rab 2765  df-v 3063  df-sbc 3280  df-csb 3376  df-dif 3419  df-un 3421  df-in 3423  df-ss 3430  df-nul 3741  df-if 3888  df-pw 3959  df-sn 3975  df-pr 3977  df-op 3981  df-uni 4194  df-iun 4275  df-br 4398  df-opab 4456  df-mpt 4457  df-id 4740  df-xp 4831  df-rel 4832  df-cnv 4833  df-co 4834  df-dm 4835  df-rn 4836  df-res 4837  df-ima 4838  df-iota 5535  df-fun 5573  df-fn 5574  df-f 5575  df-f1 5576  df-fo 5577  df-f1o 5578  df-fv 5579  df-riota 6242  df-ov 6283  df-oprab 6284  df-preset 15883  df-poset 15901  df-lub 15930  df-glb 15931  df-join 15932  df-meet 15933  df-lat 16002
This theorem is referenced by:  3atlem1  32513  dalawlem3  32903  dalawlem6  32906  cdleme1  33258  cdleme11g  33296
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