Theorem f1ocnvfv 5954

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 5672	. . 3 |- ( D = ( F ` C ) -> ( `' F ` D ) = ( `' F ` ( F ` C ) ) )
2	1	eqcoms 2237	. 2 |- ( ( F ` C ) = D -> ( `' F ` D ) = ( `' F ` ( F ` C ) ) )
3		f1ocnvfv1 5952	. . 3 |- ( ( F : A -1-1-onto-> B /\ C e. A ) -> ( `' F ` ( F ` C ) ) = C )
4	3	eqeq2d 2246	. 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 1398   e. wcel 2205   `'ccnv 4750   -1-1-onto->wf1o 5353   ` cfv 5354

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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-14 2208  ax-ext 2216  ax-sep 4230  ax-pow 4289  ax-pr 4324

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ral 2527  df-rex 2528  df-v 2817  df-sbc 3045  df-un 3217  df-in 3219  df-ss 3226  df-pw 3673  df-sn 3697  df-pr 3698  df-op 3700  df-uni 3917  df-br 4112  df-opab 4174  df-id 4416  df-xp 4757  df-rel 4758  df-cnv 4759  df-co 4760  df-dm 4761  df-rn 4762  df-res 4763  df-ima 4764  df-iota 5314  df-fun 5356  df-fn 5357  df-f 5358  df-f1 5359  df-fo 5360  df-f1o 5361  df-fv 5362

This theorem is referenced by:  f1ocnvfvb  5955  f1oiso2  6002  frecuzrdgtcl  10778  frecuzrdgsuc  10780  frecuzrdgfunlem  10785  frecfzennn  10792  0tonninf  10806  1tonninf  10807  seqf1oglem1  10885  seqf1oglem2  10886  sqpweven  12876  2sqpwodd  12877  mhmf1o  13700  ghmf1o  14009  012of  16784  isomninnlem  16831  iswomninnlem  16851  ismkvnnlem  16854