Theorem f1ocnvfv 5758

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 5496	. . 3 |- ( D = ( F ` C ) -> ( `' F ` D ) = ( `' F ` ( F ` C ) ) )
2	1	eqcoms 2173	. 2 |- ( ( F ` C ) = D -> ( `' F ` D ) = ( `' F ` ( F ` C ) ) )
3		f1ocnvfv1 5756	. . 3 |- ( ( F : A -1-1-onto-> B /\ C e. A ) -> ( `' F ` ( F ` C ) ) = C )
4	3	eqeq2d 2182	. 2 |- ( ( F : A -1-1-onto-> B /\ C e. A ) -> ( ( `' F ` D ) = ( `' F ` ( F ` C ) ) <-> ( `' F ` D ) = C ) )
5	2, 4	syl5ib 153	1 |- ( ( F : A -1-1-onto-> B /\ C e. A ) -> ( ( F ` C ) = D -> ( `' F ` D ) = C ) )

Syntax hints:   -> wi 4   /\ wa 103   = wceq 1348   e. wcel 2141   `'ccnv 4610   -1-1-onto->wf1o 5197   ` cfv 5198

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194

This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ral 2453  df-rex 2454  df-v 2732  df-sbc 2956  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-br 3990  df-opab 4051  df-id 4278  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-rn 4622  df-res 4623  df-ima 4624  df-iota 5160  df-fun 5200  df-fn 5201  df-f 5202  df-f1 5203  df-fo 5204  df-f1o 5205  df-fv 5206

This theorem is referenced by:  f1ocnvfvb  5759  f1oiso2  5806  frecuzrdgtcl  10368  frecuzrdgsuc  10370  frecuzrdgfunlem  10375  frecfzennn  10382  0tonninf  10395  1tonninf  10396  sqpweven  12129  2sqpwodd  12130  mhmf1o  12693  012of  14028  isomninnlem  14062  iswomninnlem  14081  ismkvnnlem  14084