ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  funcnvcnv Unicode version

Theorem funcnvcnv 5435
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 5237 . 2  |-  `' `' A  C_  A
2 funss 5391 . 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 3220   `'ccnv 4768   Fun wfun 5366
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 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4244  ax-pow 4306  ax-pr 4341
This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-br 4126  df-opab 4188  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-fun 5374
This theorem is referenced by:  funcnvres2  5451  inpreima  5825  difpreima  5826  f1oresrab  5864  sbthlemi8  7271  caseinj  7419  djuinj  7436  cnclima  15247
  Copyright terms: Public domain W3C validator