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Theorem f1ococnv2 6889
Description: The composition of a one-to-one onto function and its converse equals the identity relation restricted to the function's range. (Contributed by NM, 13-Dec-2003.) (Proof shortened by Stefan O'Rear, 12-Feb-2015.)
Assertion
Ref Expression
f1ococnv2 (𝐹:𝐴1-1-onto𝐵 → (𝐹𝐹) = ( I ↾ 𝐵))

Proof of Theorem f1ococnv2
StepHypRef Expression
1 f1ofo 6869 . 2 (𝐹:𝐴1-1-onto𝐵𝐹:𝐴onto𝐵)
2 fococnv2 6888 . 2 (𝐹:𝐴onto𝐵 → (𝐹𝐹) = ( I ↾ 𝐵))
31, 2syl 17 1 (𝐹:𝐴1-1-onto𝐵 → (𝐹𝐹) = ( I ↾ 𝐵))
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1537   I cid 5592  ccnv 5699  cres 5702  ccom 5704  ontowfo 6571  1-1-ontowf1o 6572
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-12 2178  ax-ext 2711  ax-sep 5317  ax-nul 5324  ax-pr 5447
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-nf 1782  df-sb 2065  df-clab 2718  df-cleq 2732  df-clel 2819  df-ral 3068  df-rex 3077  df-rab 3444  df-v 3490  df-dif 3979  df-un 3981  df-in 3983  df-ss 3993  df-nul 4353  df-if 4549  df-sn 4649  df-pr 4651  df-op 4655  df-br 5167  df-opab 5229  df-id 5593  df-xp 5706  df-rel 5707  df-cnv 5708  df-co 5709  df-dm 5710  df-rn 5711  df-res 5712  df-fun 6575  df-fn 6576  df-f 6577  df-f1 6578  df-fo 6579  df-f1o 6580
This theorem is referenced by:  f1ococnv1  6891  f1ocnvfv2  7313  mapen  9207  hashfacen  14503  setcinv  18157  catcisolem  18177  symginv  19444  f1omvdco2  19490  gsumval3  19949  gsumzf1o  19954  rngcinv  20659  ringcinv  20693  psrass1lem  21975  evl1var  22361  pf1ind  22380  fcobij  32736  symgfcoeu  33075  cycpmconjvlem  33134  cycpmconjs  33149  cyc3conja  33150  erdsze2lem2  35172  ltrncoidN  40085  cdlemg46  40692  cdlemk45  40904  cdlemk55a  40916  tendocnv  40978  eldioph2  42718  rngcinvALTV  47999  ringcinvALTV  48033
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