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Theorem wdomen2 9035
Description: Equality-like theorem for equinumerosity and weak dominance. (Contributed by Mario Carneiro, 18-May-2015.)
Assertion
Ref Expression
wdomen2 (𝐴𝐵 → (𝐶* 𝐴𝐶* 𝐵))

Proof of Theorem wdomen2
StepHypRef Expression
1 id 22 . . 3 (𝐶* 𝐴𝐶* 𝐴)
2 endom 8530 . . . 4 (𝐴𝐵𝐴𝐵)
3 domwdom 9032 . . . 4 (𝐴𝐵𝐴* 𝐵)
42, 3syl 17 . . 3 (𝐴𝐵𝐴* 𝐵)
5 wdomtr 9033 . . 3 ((𝐶* 𝐴𝐴* 𝐵) → 𝐶* 𝐵)
61, 4, 5syl2anr 598 . 2 ((𝐴𝐵𝐶* 𝐴) → 𝐶* 𝐵)
7 id 22 . . 3 (𝐶* 𝐵𝐶* 𝐵)
8 ensym 8552 . . . 4 (𝐴𝐵𝐵𝐴)
9 endom 8530 . . . 4 (𝐵𝐴𝐵𝐴)
10 domwdom 9032 . . . 4 (𝐵𝐴𝐵* 𝐴)
118, 9, 103syl 18 . . 3 (𝐴𝐵𝐵* 𝐴)
12 wdomtr 9033 . . 3 ((𝐶* 𝐵𝐵* 𝐴) → 𝐶* 𝐴)
137, 11, 12syl2anr 598 . 2 ((𝐴𝐵𝐶* 𝐵) → 𝐶* 𝐴)
146, 13impbida 799 1 (𝐴𝐵 → (𝐶* 𝐴𝐶* 𝐵))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 208   class class class wbr 5058  cen 8500  cdom 8501  * cwdom 9015
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2157  ax-12 2173  ax-ext 2793  ax-sep 5195  ax-nul 5202  ax-pow 5258  ax-pr 5321  ax-un 7455
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3496  df-dif 3938  df-un 3940  df-in 3942  df-ss 3951  df-nul 4291  df-if 4467  df-pw 4540  df-sn 4561  df-pr 4563  df-op 4567  df-uni 4832  df-br 5059  df-opab 5121  df-mpt 5139  df-id 5454  df-xp 5555  df-rel 5556  df-cnv 5557  df-co 5558  df-dm 5559  df-rn 5560  df-res 5561  df-ima 5562  df-fun 6351  df-fn 6352  df-f 6353  df-f1 6354  df-fo 6355  df-f1o 6356  df-er 8283  df-en 8504  df-dom 8505  df-sdom 8506  df-wdom 9017
This theorem is referenced by: (None)
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