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Theorem f1ococnv1 5643
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 5617 . . . 4  |-  ( F : A -1-1-onto-> B  ->  Rel  F )
2 dfrel2 5213 . . . 4  |-  ( Rel 
F  <->  `' `' F  =  F
)
31, 2sylib 122 . . 3  |-  ( F : A -1-1-onto-> B  ->  `' `' F  =  F )
43coeq2d 4917 . 2  |-  ( F : A -1-1-onto-> B  ->  ( `' F  o.  `' `' F )  =  ( `' F  o.  F
) )
5 f1ocnv 5627 . . 3  |-  ( F : A -1-1-onto-> B  ->  `' F : B -1-1-onto-> A )
6 f1ococnv2 5641 . . 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 2267 1  |-  ( F : A -1-1-onto-> B  ->  ( `' F  o.  F )  =  (  _I  |`  A ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1398    _I cid 4409   `'ccnv 4748    |` cres 4751    o. ccom 4753   Rel wrel 4754   -1-1-onto->wf1o 5351
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 2206  ax-ext 2214  ax-sep 4228  ax-pow 4287  ax-pr 4322
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ral 2525  df-rex 2526  df-v 2815  df-un 3215  df-in 3217  df-ss 3224  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-br 4110  df-opab 4172  df-id 4414  df-xp 4755  df-rel 4756  df-cnv 4757  df-co 4758  df-dm 4759  df-rn 4760  df-res 4761  df-fun 5354  df-fn 5355  df-f 5356  df-f1 5357  df-fo 5358  df-f1o 5359
This theorem is referenced by:  f1cocnv1  5644  f1ocnvfv1  5950  fcof1o  5962  mapen  7099  hashfacen  11208
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