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Theorem ordelssne 2964
Description: Corollary 7.8 of [TakeutiZaring] p. 37.
Assertion
Ref Expression
ordelssne |- ((Ord A /\ Ord B) -> (A e. B <-> (A (_ B /\ A =/= B)))

Proof of Theorem ordelssne
StepHypRef Expression
1 tz7.7 2963 . . 3 |- ((Ord B /\ Tr A) -> (A e. B <-> (A (_ B /\ A =/= B)))
2 ordtr 2952 . . 3 |- (Ord A -> Tr A)
31, 2sylan2 451 . 2 |- ((Ord B /\ Ord A) -> (A e. B <-> (A (_ B /\ A =/= B)))
43ancoms 436 1 |- ((Ord A /\ Ord B) -> (A e. B <-> (A (_ B /\ A =/= B)))
Colors of variables: wff set class
Syntax hints:   -> wi 3   <-> wb 146   /\ wa 223   e. wcel 955   =/= wne 1577   (_ wss 2037  Tr wtr 2670  Ord word 2937
This theorem is referenced by:  ordelpss 2965  ordsseleq 2966  ordsson 2981  onelpsst 2988  orduniorsuc 3077  ominf 4508
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 959  ax-gen 960  ax-8 961  ax-10 963  ax-11 964  ax-12 965  ax-13 966  ax-14 967  ax-17 968  ax-4 970  ax-5o 972  ax-6o 975  ax-9o 1119  ax-10o 1136  ax-16 1206  ax-11o 1213  ax-ext 1452  ax-sep 2693  ax-pow 2732  ax-pr 2769
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-3or 774  df-3an 775  df-ex 978  df-sb 1168  df-eu 1375  df-mo 1376  df-clab 1457  df-cleq 1462  df-clel 1465  df-ne 1579  df-ral 1641  df-rex 1642  df-v 1803  df-dif 2039  df-un 2040  df-in 2041  df-ss 2043  df-nul 2271  df-pw 2392  df-sn 2402  df-pr 2403  df-op 2406  df-uni 2494  df-br 2610  df-opab 2657  df-tr 2671  df-eprel 2821  df-po 2831  df-so 2841  df-fr 2907  df-we 2924  df-ord 2941
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