Theorem f1ocnvfv 5783

Description: Relationship between the value of a one-to-one onto function and the value of its converse. (Contributed by Raph Levien, 10-Apr-2004.)

Assertion

Ref	Expression
f1ocnvfv	|- ( ( F : A -1-1-onto-> B /\ C e. A ) -> ( ( F ` C ) = D -> ( `' F ` D ) = C ) )

Proof of Theorem f1ocnvfv

Step	Hyp	Ref	Expression
1		fveq2 5517	. . 3 |- ( D = ( F ` C ) -> ( `' F ` D ) = ( `' F ` ( F ` C ) ) )
2	1	eqcoms 2180	. 2 |- ( ( F ` C ) = D -> ( `' F ` D ) = ( `' F ` ( F ` C ) ) )
3		f1ocnvfv1 5781	. . 3 |- ( ( F : A -1-1-onto-> B /\ C e. A ) -> ( `' F ` ( F ` C ) ) = C )
4	3	eqeq2d 2189	. 2 |- ( ( F : A -1-1-onto-> B /\ C e. A ) -> ( ( `' F ` D ) = ( `' F ` ( F ` C ) ) <-> ( `' F ` D ) = C ) )
5	2, 4	imbitrid 154	1 |- ( ( F : A -1-1-onto-> B /\ C e. A ) -> ( ( F ` C ) = D -> ( `' F ` D ) = C ) )

Syntax hints:   -> wi 4   /\ wa 104   = wceq 1353   e. wcel 2148   `'ccnv 4627   -1-1-onto->wf1o 5217   ` cfv 5218

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 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-14 2151  ax-ext 2159  ax-sep 4123  ax-pow 4176  ax-pr 4211

This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ral 2460  df-rex 2461  df-v 2741  df-sbc 2965  df-un 3135  df-in 3137  df-ss 3144  df-pw 3579  df-sn 3600  df-pr 3601  df-op 3603  df-uni 3812  df-br 4006  df-opab 4067  df-id 4295  df-xp 4634  df-rel 4635  df-cnv 4636  df-co 4637  df-dm 4638  df-rn 4639  df-res 4640  df-ima 4641  df-iota 5180  df-fun 5220  df-fn 5221  df-f 5222  df-f1 5223  df-fo 5224  df-f1o 5225  df-fv 5226

This theorem is referenced by:  f1ocnvfvb  5784  f1oiso2  5831  frecuzrdgtcl  10415  frecuzrdgsuc  10417  frecuzrdgfunlem  10422  frecfzennn  10429  0tonninf  10442  1tonninf  10443  sqpweven  12178  2sqpwodd  12179  mhmf1o  12867  012of  14886  isomninnlem  14919  iswomninnlem  14938  ismkvnnlem  14941