MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  cnvcnv2 Unicode version

Theorem cnvcnv2 5127
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 5126 . 2  |-  `' `' A  =  ( A  i^i  ( _V  X.  _V ) )
2 df-res 4701 . 2  |-  ( A  |`  _V )  =  ( A  i^i  ( _V 
X.  _V ) )
31, 2eqtr4i 2306 1  |-  `' `' A  =  ( A  |` 
_V )
Colors of variables: wff set class
Syntax hints:    = wceq 1623   _Vcvv 2788    i^i cin 3151    X. cxp 4687   `'ccnv 4688    |` cres 4691
This theorem is referenced by:  dfrel3  5131  rnresv  5133  rescnvcnv  5135  cocnvcnv1  5183  cocnvcnv2  5184  strfv2d  13178
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1533  ax-5 1544  ax-17 1603  ax-9 1635  ax-8 1643  ax-14 1688  ax-6 1703  ax-7 1708  ax-11 1715  ax-12 1866  ax-ext 2264  ax-sep 4141  ax-nul 4149  ax-pr 4214
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3an 936  df-tru 1310  df-ex 1529  df-nf 1532  df-sb 1630  df-eu 2147  df-mo 2148  df-clab 2270  df-cleq 2276  df-clel 2279  df-nfc 2408  df-ne 2448  df-ral 2548  df-rex 2549  df-rab 2552  df-v 2790  df-dif 3155  df-un 3157  df-in 3159  df-ss 3166  df-nul 3456  df-if 3566  df-sn 3646  df-pr 3647  df-op 3649  df-br 4024  df-opab 4078  df-xp 4695  df-rel 4696  df-cnv 4697  df-res 4701
  Copyright terms: Public domain W3C validator