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Theorem omord2 6739
Description: Ordering property of ordinal multiplication. (Contributed by NM, 25-Dec-2004.)
Assertion
Ref Expression
omord2  |-  ( ( ( A  e.  On  /\  B  e.  On  /\  C  e.  On )  /\  (/)  e.  C )  ->  ( A  e.  B  <->  ( C  .o  A )  e.  ( C  .o  B ) ) )

Proof of Theorem omord2
StepHypRef Expression
1 omordi 6738 . . 3  |-  ( ( ( B  e.  On  /\  C  e.  On )  /\  (/)  e.  C )  ->  ( A  e.  B  ->  ( C  .o  A )  e.  ( C  .o  B ) ) )
213adantl1 1113 . 2  |-  ( ( ( A  e.  On  /\  B  e.  On  /\  C  e.  On )  /\  (/)  e.  C )  ->  ( A  e.  B  ->  ( C  .o  A )  e.  ( C  .o  B ) ) )
3 oveq2 6021 . . . . . 6  |-  ( A  =  B  ->  ( C  .o  A )  =  ( C  .o  B
) )
43a1i 11 . . . . 5  |-  ( ( ( A  e.  On  /\  B  e.  On  /\  C  e.  On )  /\  (/)  e.  C )  ->  ( A  =  B  ->  ( C  .o  A )  =  ( C  .o  B ) ) )
5 omordi 6738 . . . . . 6  |-  ( ( ( A  e.  On  /\  C  e.  On )  /\  (/)  e.  C )  ->  ( B  e.  A  ->  ( C  .o  B )  e.  ( C  .o  A ) ) )
653adantl2 1114 . . . . 5  |-  ( ( ( A  e.  On  /\  B  e.  On  /\  C  e.  On )  /\  (/)  e.  C )  ->  ( B  e.  A  ->  ( C  .o  B )  e.  ( C  .o  A ) ) )
74, 6orim12d 812 . . . 4  |-  ( ( ( A  e.  On  /\  B  e.  On  /\  C  e.  On )  /\  (/)  e.  C )  ->  ( ( A  =  B  \/  B  e.  A )  ->  (
( C  .o  A
)  =  ( C  .o  B )  \/  ( C  .o  B
)  e.  ( C  .o  A ) ) ) )
87con3d 127 . . 3  |-  ( ( ( A  e.  On  /\  B  e.  On  /\  C  e.  On )  /\  (/)  e.  C )  ->  ( -.  (
( C  .o  A
)  =  ( C  .o  B )  \/  ( C  .o  B
)  e.  ( C  .o  A ) )  ->  -.  ( A  =  B  \/  B  e.  A ) ) )
9 omcl 6709 . . . . . . . 8  |-  ( ( C  e.  On  /\  A  e.  On )  ->  ( C  .o  A
)  e.  On )
10 omcl 6709 . . . . . . . 8  |-  ( ( C  e.  On  /\  B  e.  On )  ->  ( C  .o  B
)  e.  On )
11 eloni 4525 . . . . . . . . 9  |-  ( ( C  .o  A )  e.  On  ->  Ord  ( C  .o  A
) )
12 eloni 4525 . . . . . . . . 9  |-  ( ( C  .o  B )  e.  On  ->  Ord  ( C  .o  B
) )
13 ordtri2 4550 . . . . . . . . 9  |-  ( ( Ord  ( C  .o  A )  /\  Ord  ( C  .o  B
) )  ->  (
( C  .o  A
)  e.  ( C  .o  B )  <->  -.  (
( C  .o  A
)  =  ( C  .o  B )  \/  ( C  .o  B
)  e.  ( C  .o  A ) ) ) )
1411, 12, 13syl2an 464 . . . . . . . 8  |-  ( ( ( C  .o  A
)  e.  On  /\  ( C  .o  B
)  e.  On )  ->  ( ( C  .o  A )  e.  ( C  .o  B
)  <->  -.  ( ( C  .o  A )  =  ( C  .o  B
)  \/  ( C  .o  B )  e.  ( C  .o  A
) ) ) )
159, 10, 14syl2an 464 . . . . . . 7  |-  ( ( ( C  e.  On  /\  A  e.  On )  /\  ( C  e.  On  /\  B  e.  On ) )  -> 
( ( C  .o  A )  e.  ( C  .o  B )  <->  -.  ( ( C  .o  A )  =  ( C  .o  B )  \/  ( C  .o  B )  e.  ( C  .o  A ) ) ) )
1615anandis 804 . . . . . 6  |-  ( ( C  e.  On  /\  ( A  e.  On  /\  B  e.  On ) )  ->  ( ( C  .o  A )  e.  ( C  .o  B
)  <->  -.  ( ( C  .o  A )  =  ( C  .o  B
)  \/  ( C  .o  B )  e.  ( C  .o  A
) ) ) )
1716ancoms 440 . . . . 5  |-  ( ( ( A  e.  On  /\  B  e.  On )  /\  C  e.  On )  ->  ( ( C  .o  A )  e.  ( C  .o  B
)  <->  -.  ( ( C  .o  A )  =  ( C  .o  B
)  \/  ( C  .o  B )  e.  ( C  .o  A
) ) ) )
18173impa 1148 . . . 4  |-  ( ( A  e.  On  /\  B  e.  On  /\  C  e.  On )  ->  (
( C  .o  A
)  e.  ( C  .o  B )  <->  -.  (
( C  .o  A
)  =  ( C  .o  B )  \/  ( C  .o  B
)  e.  ( C  .o  A ) ) ) )
1918adantr 452 . . 3  |-  ( ( ( A  e.  On  /\  B  e.  On  /\  C  e.  On )  /\  (/)  e.  C )  ->  ( ( C  .o  A )  e.  ( C  .o  B
)  <->  -.  ( ( C  .o  A )  =  ( C  .o  B
)  \/  ( C  .o  B )  e.  ( C  .o  A
) ) ) )
20 eloni 4525 . . . . . 6  |-  ( A  e.  On  ->  Ord  A )
21 eloni 4525 . . . . . 6  |-  ( B  e.  On  ->  Ord  B )
22 ordtri2 4550 . . . . . 6  |-  ( ( Ord  A  /\  Ord  B )  ->  ( A  e.  B  <->  -.  ( A  =  B  \/  B  e.  A ) ) )
2320, 21, 22syl2an 464 . . . . 5  |-  ( ( A  e.  On  /\  B  e.  On )  ->  ( A  e.  B  <->  -.  ( A  =  B  \/  B  e.  A
) ) )
24233adant3 977 . . . 4  |-  ( ( A  e.  On  /\  B  e.  On  /\  C  e.  On )  ->  ( A  e.  B  <->  -.  ( A  =  B  \/  B  e.  A )
) )
2524adantr 452 . . 3  |-  ( ( ( A  e.  On  /\  B  e.  On  /\  C  e.  On )  /\  (/)  e.  C )  ->  ( A  e.  B  <->  -.  ( A  =  B  \/  B  e.  A ) ) )
268, 19, 253imtr4d 260 . 2  |-  ( ( ( A  e.  On  /\  B  e.  On  /\  C  e.  On )  /\  (/)  e.  C )  ->  ( ( C  .o  A )  e.  ( C  .o  B
)  ->  A  e.  B ) )
272, 26impbid 184 1  |-  ( ( ( A  e.  On  /\  B  e.  On  /\  C  e.  On )  /\  (/)  e.  C )  ->  ( A  e.  B  <->  ( C  .o  A )  e.  ( C  .o  B ) ) )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    <-> wb 177    \/ wo 358    /\ wa 359    /\ w3a 936    = wceq 1649    e. wcel 1717   (/)c0 3564   Ord word 4514   Oncon0 4515  (class class class)co 6013    .o comu 6651
This theorem is referenced by:  omord  6740  omword  6742  oeeui  6774  omabs  6819  omxpenlem  7138  cantnflt  7553  cnfcom  7583
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 2361  ax-rep 4254  ax-sep 4264  ax-nul 4272  ax-pow 4311  ax-pr 4337  ax-un 4634
This theorem depends on definitions:  df-bi 178  df-or 360  df-an 361  df-3or 937  df-3an 938  df-tru 1325  df-ex 1548  df-nf 1551  df-sb 1656  df-eu 2235  df-mo 2236  df-clab 2367  df-cleq 2373  df-clel 2376  df-nfc 2505  df-ne 2545  df-ral 2647  df-rex 2648  df-reu 2649  df-rab 2651  df-v 2894  df-sbc 3098  df-csb 3188  df-dif 3259  df-un 3261  df-in 3263  df-ss 3270  df-pss 3272  df-nul 3565  df-if 3676  df-pw 3737  df-sn 3756  df-pr 3757  df-tp 3758  df-op 3759  df-uni 3951  df-iun 4030  df-br 4147  df-opab 4201  df-mpt 4202  df-tr 4237  df-eprel 4428  df-id 4432  df-po 4437  df-so 4438  df-fr 4475  df-we 4477  df-ord 4518  df-on 4519  df-lim 4520  df-suc 4521  df-om 4779  df-xp 4817  df-rel 4818  df-cnv 4819  df-co 4820  df-dm 4821  df-rn 4822  df-res 4823  df-ima 4824  df-iota 5351  df-fun 5389  df-fn 5390  df-f 5391  df-f1 5392  df-fo 5393  df-f1o 5394  df-fv 5395  df-ov 6016  df-oprab 6017  df-mpt2 6018  df-recs 6562  df-rdg 6597  df-oadd 6657  df-omul 6658
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