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Theorem f1ococnv2 6845
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 6825 . 2 (𝐹:𝐴1-1-onto𝐵𝐹:𝐴onto𝐵)
2 fococnv2 6844 . 2 (𝐹:𝐴onto𝐵 → (𝐹𝐹) = ( I ↾ 𝐵))
31, 2syl 18 1 (𝐹:𝐴1-1-onto𝐵 → (𝐹𝐹) = ( I ↾ 𝐵))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4   = wceq 1570   I cid 5549  ccnv 5654  cres 5657  ccom 5659  ontowfo 6531  1-1-ontowf1o 6532
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-ext 2732  ax-sep 5251  ax-pr 5398
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-clab 2739  df-cleq 2752  df-clel 2835  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-sn 4585  df-pr 4587  df-op 4591  df-br 5104  df-opab 5168  df-id 5550  df-xp 5661  df-rel 5662  df-cnv 5663  df-co 5664  df-dm 5665  df-rn 5666  df-res 5667  df-fun 6535  df-fn 6536  df-f 6537  df-f1 6538  df-fo 6539  df-f1o 6540
This theorem is used by:  f1ococnv1  6847  f1ocnvfv2  7278  mapen  9139  hashfacen  14519  setcinv  18179  catcisolem  18199  symginv  19529  f1omvdco2  19575  gsumval3  20034  gsumzf1o  20039  rngcinv  20799  ringcinv  20833  psrass1lem  22148  evl1var  22561  pf1ind  22580  fcobij  33191  cocnvf1o  33200  symgfcoeu  33522  cycpmconjvlem  33581  cycpmconjs  33596  cyc3conja  33597  mplvrpmrhm  34057  erdsze2lem2  35783  ltrncoidN  41001  cdlemg46  41608  cdlemk45  41820  cdlemk55a  41832  tendocnv  41894  eldioph2  43607  rngcinvALTV  49191  ringcinvALTV  49225
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