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Theorem f1ococnv2 6809
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 6789 . 2 (𝐹:𝐴1-1-onto𝐵𝐹:𝐴onto𝐵)
2 fococnv2 6808 . 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 1542   I cid 5526  ccnv 5631  cres 5634  ccom 5636  ontowfo 6498  1-1-ontowf1o 6499
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-ext 2709  ax-sep 5243  ax-pr 5379
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-sb 2069  df-clab 2716  df-cleq 2729  df-clel 2812  df-ral 3053  df-rex 3063  df-rab 3402  df-v 3444  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-nul 4288  df-if 4482  df-sn 4583  df-pr 4585  df-op 4589  df-br 5101  df-opab 5163  df-id 5527  df-xp 5638  df-rel 5639  df-cnv 5640  df-co 5641  df-dm 5642  df-rn 5643  df-res 5644  df-fun 6502  df-fn 6503  df-f 6504  df-f1 6505  df-fo 6506  df-f1o 6507
This theorem is referenced by:  f1ococnv1  6811  f1ocnvfv2  7233  mapen  9081  hashfacen  14389  setcinv  18026  catcisolem  18046  symginv  19343  f1omvdco2  19389  gsumval3  19848  gsumzf1o  19853  rngcinv  20582  ringcinv  20616  psrass1lem  21900  evl1var  22292  pf1ind  22311  fcobij  32809  cocnvf1o  32818  symgfcoeu  33175  cycpmconjvlem  33234  cycpmconjs  33249  cyc3conja  33250  mplvrpmrhm  33723  erdsze2lem2  35417  ltrncoidN  40501  cdlemg46  41108  cdlemk45  41320  cdlemk55a  41332  tendocnv  41394  eldioph2  43116  rngcinvALTV  48633  ringcinvALTV  48667
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