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Theorem funcnvcnv 5415
Description: The double converse of a function is a function. (Contributed by NM, 21-Sep-2004.)
Assertion
Ref Expression
funcnvcnv  |-  ( Fun 
A  ->  Fun  `' `' A )

Proof of Theorem funcnvcnv
StepHypRef Expression
1 cnvcnvss 5217 . 2  |-  `' `' A  C_  A
2 funss 5371 . 2  |-  ( `' `' A  C_  A  -> 
( Fun  A  ->  Fun  `' `' A ) )
31, 2ax-mp 5 1  |-  ( Fun 
A  ->  Fun  `' `' A )
Colors of variables: wff set class
Syntax hints:    -> wi 4    C_ wss 3211   `'ccnv 4748   Fun wfun 5346
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-xp 4755  df-rel 4756  df-cnv 4757  df-co 4758  df-fun 5354
This theorem is referenced by:  funcnvres2  5431  inpreima  5803  difpreima  5804  f1oresrab  5842  sbthlemi8  7234  caseinj  7380  djuinj  7397  cnclima  15088
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