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Theorem sdomentr 4476
Description: Transitivity of strict dominance and equinumerosity. Exercise 11 of [Suppes] p. 98.
Assertion
Ref Expression
sdomentr |- (C e. D -> ((A ~< B /\ B ~~ C) -> A ~< C))

Proof of Theorem sdomentr
StepHypRef Expression
1 sdomdomtr 4475 . 2 |- (C e. D -> ((A ~< B /\ B ~<_ C) -> A ~< C))
2 endom 4391 . 2 |- (B ~~ C -> B ~<_ C)
31, 2sylan2i 467 1 |- (C e. D -> ((A ~< B /\ B ~~ C) -> A ~< C))
Colors of variables: wff set class
Syntax hints:   -> wi 3   /\ wa 223   e. wcel 960   class class class wbr 2624   ~~ cen 4370   ~<_ cdom 4371   ~< csdm 4372
This theorem is referenced by:  sdomen2 4488  numthcor 4796  unxpdom2 4856  sdomsdomcard 4859  infxpidmlem1 7553  infdif2 7570
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 964  ax-gen 965  ax-8 966  ax-9 967  ax-10 968  ax-11 969  ax-12 970  ax-13 971  ax-14 972  ax-17 973  ax-4 975  ax-5o 977  ax-6o 980  ax-9o 1125  ax-10o 1142  ax-16 1212  ax-11o 1220  ax-ext 1462  ax-rep 2698  ax-sep 2708  ax-pow 2748  ax-pr 2785  ax-un 2872
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-3an 779  df-ex 983  df-sb 1174  df-eu 1384  df-mo 1385  df-clab 1467  df-cleq 1472  df-clel 1475  df-ne 1590  df-ral 1652  df-rex 1653  df-v 1815  df-dif 2052  df-un 2053  df-in 2054  df-ss 2056  df-nul 2284  df-pw 2406  df-sn 2416  df-pr 2417  df-op 2420  df-uni 2508  df-br 2625  df-opab 2672  df-id 2841  df-xp 3190  df-rel 3191  df-cnv 3192  df-co 3193  df-dm 3194  df-rn 3195  df-res 3196  df-ima 3197  df-fun 3198  df-fn 3199  df-f 3200  df-f1 3201  df-fo 3202  df-f1o 3203  df-er 4267  df-en 4374  df-dom 4375  df-sdom 4376
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