Theorem cnvcnv2 5236

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

Step	Hyp	Ref	Expression
1		cnvcnv 5235	. 2 |- `' `' A = ( A i^i ( _V X. _V ) )
2		df-res 4781	. 2 |- ( A |` _V ) = ( A i^i ( _V X. _V ) )
3	1, 2	eqtr4i 2262	1 |- `' `' A = ( A |` _V )

Syntax hints:   = wceq 1402   _Vcvv 2821   i^i cin 3219   X. cxp 4767   `'ccnv 4768   |` cres 4771

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-res 4781

This theorem is referenced by:  dfrel3  5240  rnresv  5242  rescnvcnv  5245  cocnvcnv1  5293  cocnvcnv2  5294  strslfv2d  13373