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Theorem funcnvres2 6620
Description: The converse of a restriction of the converse of a function equals the function restricted to the image of its converse. (Contributed by NM, 4-May-2005.)
Assertion
Ref Expression
funcnvres2 (Fun 𝐹 → ◡(◡𝐹 ↾ 𝐴) = (𝐹 ↾ (◡𝐹 “ 𝐴)))

Proof of Theorem funcnvres2
StepHypRef Expression
1 funcnvcnv 6607 . . 3 (Fun 𝐹 → Fun ◡◡𝐹)
2 funcnvres 6618 . . 3 (Fun ◡◡𝐹 → ◡(◡𝐹 ↾ 𝐴) = (◡◡𝐹 ↾ (◡𝐹 “ 𝐴)))
31, 2syl 18 . 2 (Fun 𝐹 → ◡(◡𝐹 ↾ 𝐴) = (◡◡𝐹 ↾ (◡𝐹 “ 𝐴)))
4 funrel 6556 . . . 4 (Fun 𝐹 → Rel 𝐹)
5 dfrel2 6180 . . . 4 (Rel 𝐹 ↔ ◡◡𝐹 = 𝐹)
64, 5sylib 221 . . 3 (Fun 𝐹 → ◡◡𝐹 = 𝐹)
76reseq1d 5968 . 2 (Fun 𝐹 → (◡◡𝐹 ↾ (◡𝐹 “ 𝐴)) = (𝐹 ↾ (◡𝐹 “ 𝐴)))
83, 7eqtrd 2795 1 (Fun 𝐹 → ◡(◡𝐹 ↾ 𝐴) = (𝐹 ↾ (◡𝐹 “ 𝐴)))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   = wceq 1569  ◡ccnv 5649   ↾ cres 5652   “ cima 5653  Rel wrel 5655  Fun wfun 6532
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-12 2212  ax-ext 2732  ax-sep 5248  ax-pr 5390
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-sb 2099  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-ss 3896  df-dif 4047  df-in 4091  df-un 4151  df-nul 4279  df-if 4482  df-sn 4585  df-pr 4587  df-op 4835  df-br 5103  df-opab 5167  df-id 5545  df-xp 5656  df-rel 5657  df-cnv 5658  df-co 5659  df-dm 5660  df-rn 5661  df-res 5662  df-ima 5663  df-fun 6540
This theorem is used by:  funimacnv  6621  foimacnv  6842  unbenlem  17091  ofco2  22771  dvlog  26984  fresf1o  33272  fressupp  33328
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