Theorem f1oen2g 6869

Description: The domain and range of a one-to-one, onto function are equinumerous. This variation of f1oeng 6871 does not require the Axiom of Replacement. (Contributed by Mario Carneiro, 10-Sep-2015.)

Assertion

Ref	Expression
f1oen2g	|- ( ( A e. V /\ B e. W /\ F : A -1-1-onto-> B ) -> A ~~ B )

Proof of Theorem f1oen2g

Step	Hyp	Ref	Expression
1		f1of 5544	. . . 4 |- ( F : A -1-1-onto-> B -> F : A --> B )
2		fex2 5464	. . . 4 |- ( ( F : A --> B /\ A e. V /\ B e. W ) -> F e. _V )
3	1, 2	syl3an1 1283	. . 3 |- ( ( F : A -1-1-onto-> B /\ A e. V /\ B e. W ) -> F e. _V )
4	3	3coml 1213	. 2 |- ( ( A e. V /\ B e. W /\ F : A -1-1-onto-> B ) -> F e. _V )
5		simp3 1002	. 2 |- ( ( A e. V /\ B e. W /\ F : A -1-1-onto-> B ) -> F : A -1-1-onto-> B )
6		f1oen3g 6868	. 2 |- ( ( F e. _V /\ F : A -1-1-onto-> B ) -> A ~~ B )
7	4, 5, 6	syl2anc 411	1 |- ( ( A e. V /\ B e. W /\ F : A -1-1-onto-> B ) -> A ~~ B )

Syntax hints:   -> wi 4   /\ w3a 981   e. wcel 2178   _Vcvv 2776   class class class wbr 4059   -->wf 5286   -1-1-onto->wf1o 5289   ~~ cen 6848

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-13 2180  ax-14 2181  ax-ext 2189  ax-sep 4178  ax-pow 4234  ax-pr 4269  ax-un 4498

This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-nf 1485  df-sb 1787  df-eu 2058  df-mo 2059  df-clab 2194  df-cleq 2200  df-clel 2203  df-nfc 2339  df-ral 2491  df-rex 2492  df-v 2778  df-un 3178  df-in 3180  df-ss 3187  df-pw 3628  df-sn 3649  df-pr 3650  df-op 3652  df-uni 3865  df-br 4060  df-opab 4122  df-xp 4699  df-rel 4700  df-cnv 4701  df-co 4702  df-dm 4703  df-rn 4704  df-fun 5292  df-fn 5293  df-f 5294  df-f1 5295  df-fo 5296  df-f1o 5297  df-en 6851

This theorem is referenced by:  f1oeng  6871  enrefg  6878  en2d  6882  en3d  6883  ener  6894  f1imaen2g  6908  cnven  6924  xpcomen  6947  exmidpw2en  7035  xpfi  7055  iccen  10163  nnenom  10616  eqgen  13678