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Theorem f1ococnv1 5612
Description: The composition of a one-to-one onto function's converse and itself equals the identity relation restricted to the function's domain. (Contributed by NM, 13-Dec-2003.)
Assertion
Ref Expression
f1ococnv1  |-  ( F : A -1-1-onto-> B  ->  ( `' F  o.  F )  =  (  _I  |`  A ) )

Proof of Theorem f1ococnv1
StepHypRef Expression
1 f1orel 5586 . . . 4  |-  ( F : A -1-1-onto-> B  ->  Rel  F )
2 dfrel2 5187 . . . 4  |-  ( Rel 
F  <->  `' `' F  =  F
)
31, 2sylib 122 . . 3  |-  ( F : A -1-1-onto-> B  ->  `' `' F  =  F )
43coeq2d 4892 . 2  |-  ( F : A -1-1-onto-> B  ->  ( `' F  o.  `' `' F )  =  ( `' F  o.  F
) )
5 f1ocnv 5596 . . 3  |-  ( F : A -1-1-onto-> B  ->  `' F : B -1-1-onto-> A )
6 f1ococnv2 5610 . . 3  |-  ( `' F : B -1-1-onto-> A  -> 
( `' F  o.  `' `' F )  =  (  _I  |`  A )
)
75, 6syl 14 . 2  |-  ( F : A -1-1-onto-> B  ->  ( `' F  o.  `' `' F )  =  (  _I  |`  A )
)
84, 7eqtr3d 2266 1  |-  ( F : A -1-1-onto-> B  ->  ( `' F  o.  F )  =  (  _I  |`  A ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1397    _I cid 4385   `'ccnv 4724    |` cres 4727    o. ccom 4729   Rel wrel 4730   -1-1-onto->wf1o 5325
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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-br 4089  df-opab 4151  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-fun 5328  df-fn 5329  df-f 5330  df-f1 5331  df-fo 5332  df-f1o 5333
This theorem is referenced by:  f1cocnv1  5613  f1ocnvfv1  5917  fcof1o  5929  mapen  7031  hashfacen  11099
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