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Theorem cnvcnv2 5241
Description: The double converse of a class equals its restriction to the universe. (Contributed by NM, 8-Oct-2007.)
Assertion
Ref Expression
cnvcnv2  |-  `' `' A  =  ( A  |` 
_V )

Proof of Theorem cnvcnv2
StepHypRef Expression
1 cnvcnv 5240 . 2  |-  `' `' A  =  ( A  i^i  ( _V  X.  _V ) )
2 df-res 4786 . 2  |-  ( A  |`  _V )  =  ( A  i^i  ( _V 
X.  _V ) )
31, 2eqtr4i 2262 1  |-  `' `' A  =  ( A  |` 
_V )
Colors of variables:    wff set class
This proof depends on syntax axioms:    = wceq 1402   _Vcvv 2821    i^i cin 3219    X. cxp 4772   `'ccnv 4773    |` cres 4776
This proof depends on 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 4249  ax-pow 4311  ax-pr 4346
This proof 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 3690  df-sn 3715  df-pr 3716  df-op 3718  df-br 4131  df-opab 4193  df-xp 4780  df-rel 4781  df-cnv 4782  df-res 4786
This theorem is used by:  dfrel3  5245  rnresv  5247  rescnvcnv  5250  cocnvcnv1  5298  cocnvcnv2  5299  strslfv2d  13395
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