Theorem f1oen2g 7031

Description: The domain and range of a one-to-one, onto function are equinumerous. This variation of f1oeng 7033 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 5634	. . . 4 |- ( F : A -1-1-onto-> B -> F : A --> B )
2		fex2 5551	. . . 4 |- ( ( F : A --> B /\ A e. V /\ B e. W ) -> F e. _V )
3	1, 2	syl3an1 1311	. . 3 |- ( ( F : A -1-1-onto-> B /\ A e. V /\ B e. W ) -> F e. _V )
4	3	3coml 1241	. 2 |- ( ( A e. V /\ B e. W /\ F : A -1-1-onto-> B ) -> F e. _V )
5		simp3 1030	. 2 |- ( ( A e. V /\ B e. W /\ F : A -1-1-onto-> B ) -> F : A -1-1-onto-> B )
6		f1oen3g 7030	. 2 |- ( ( F e. _V /\ F : A -1-1-onto-> B ) -> A ~~ B )
7	4, 5, 6	syl2anc 415	1 |- ( ( A e. V /\ B e. W /\ F : A -1-1-onto-> B ) -> A ~~ B )

Syntax hints:   -> wi 4   /\ w3a 1009   e. wcel 2209   _Vcvv 2821   class class class wbr 4125   -->wf 5368   -1-1-onto->wf1o 5371   ~~ cen 7010

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 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4244  ax-pow 4306  ax-pr 4341  ax-un 4573

This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-br 4126  df-opab 4188  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-fun 5374  df-fn 5375  df-f 5376  df-f1 5377  df-fo 5378  df-f1o 5379  df-en 7013

This theorem is referenced by:  f1oeng  7033  enrefg  7040  en2d  7044  en3d  7045  ener  7056  f1imaen2g  7070  cnven  7086  xpcomen  7115  exmidpw2en  7209  xpfi  7229  iccen  10388  nnenom  10849  eqgen  14007