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Theorem funcnvcnv 5333
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 5137 . 2  |-  `' `' A  C_  A
2 funss 5290 . 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 3166   `'ccnv 4674   Fun wfun 5265
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 711  ax-5 1470  ax-7 1471  ax-gen 1472  ax-ie1 1516  ax-ie2 1517  ax-8 1527  ax-10 1528  ax-11 1529  ax-i12 1530  ax-bndl 1532  ax-4 1533  ax-17 1549  ax-i9 1553  ax-ial 1557  ax-i5r 1558  ax-14 2179  ax-ext 2187  ax-sep 4162  ax-pow 4218  ax-pr 4253
This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-nf 1484  df-sb 1786  df-eu 2057  df-mo 2058  df-clab 2192  df-cleq 2198  df-clel 2201  df-nfc 2337  df-ral 2489  df-rex 2490  df-v 2774  df-un 3170  df-in 3172  df-ss 3179  df-pw 3618  df-sn 3639  df-pr 3640  df-op 3642  df-br 4045  df-opab 4106  df-xp 4681  df-rel 4682  df-cnv 4683  df-co 4684  df-fun 5273
This theorem is referenced by:  funcnvres2  5349  inpreima  5706  difpreima  5707  f1oresrab  5745  sbthlemi8  7066  caseinj  7191  djuinj  7208  cnclima  14695
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