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Theorem cnvcnvres 5010
Description: The double converse of the restriction of a class. (Contributed by NM, 3-Jun-2007.)
Assertion
Ref Expression
cnvcnvres  |-  `' `' ( A  |`  B )  =  ( `' `' A  |`  B )

Proof of Theorem cnvcnvres
StepHypRef Expression
1 relres 4855 . . 3  |-  Rel  ( A  |`  B )
2 dfrel2 4997 . . 3  |-  ( Rel  ( A  |`  B )  <->  `' `' ( A  |`  B )  =  ( A  |`  B )
)
31, 2mpbi 144 . 2  |-  `' `' ( A  |`  B )  =  ( A  |`  B )
4 rescnvcnv 5009 . 2  |-  ( `' `' A  |`  B )  =  ( A  |`  B )
53, 4eqtr4i 2164 1  |-  `' `' ( A  |`  B )  =  ( `' `' A  |`  B )
Colors of variables: wff set class
Syntax hints:    = wceq 1332   `'ccnv 4546    |` cres 4549   Rel wrel 4552
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1424  ax-7 1425  ax-gen 1426  ax-ie1 1470  ax-ie2 1471  ax-8 1483  ax-10 1484  ax-11 1485  ax-i12 1486  ax-bndl 1487  ax-4 1488  ax-14 1493  ax-17 1507  ax-i9 1511  ax-ial 1515  ax-i5r 1516  ax-ext 2122  ax-sep 4054  ax-pow 4106  ax-pr 4139
This theorem depends on definitions:  df-bi 116  df-3an 965  df-tru 1335  df-nf 1438  df-sb 1737  df-eu 2003  df-mo 2004  df-clab 2127  df-cleq 2133  df-clel 2136  df-nfc 2271  df-ral 2422  df-rex 2423  df-v 2691  df-un 3080  df-in 3082  df-ss 3089  df-pw 3517  df-sn 3538  df-pr 3539  df-op 3541  df-br 3938  df-opab 3998  df-xp 4553  df-rel 4554  df-cnv 4555  df-res 4559
This theorem is referenced by: (None)
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