Theorem ecqs 6768

Description: Equivalence class in terms of quotient set. (Contributed by NM, 29-Jan-1999.)

Hypothesis

Ref	Expression
ecqs.1	|- R e. _V

Assertion

Ref	Expression
ecqs	|- [ A ] R = U. ( { A } /. R )

Proof of Theorem ecqs

Step	Hyp	Ref	Expression
1		df-ec 6706	. 2 |- [ A ] R = ( R " { A } )
2		ecqs.1	. . 3 |- R e. _V
3		uniqs 6764	. . 3 |- ( R e. _V -> U. ( { A } /. R ) = ( R " { A } ) )
4	2, 3	ax-mp 5	. 2 |- U. ( { A } /. R ) = ( R " { A } )
5	1, 4	eqtr4i 2254	1 |- [ A ] R = U. ( { A } /. R )

Syntax hints:   = wceq 1397   e. wcel 2201   _Vcvv 2801   {csn 3668   U.cuni 3892   "cima 4727   [cec 6702   /.cqs 6703

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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2203  ax-14 2204  ax-ext 2212  ax-sep 4206  ax-pow 4263  ax-pr 4298  ax-un 4529

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1810  df-eu 2081  df-mo 2082  df-clab 2217  df-cleq 2223  df-clel 2226  df-nfc 2362  df-ral 2514  df-rex 2515  df-v 2803  df-un 3203  df-in 3205  df-ss 3212  df-pw 3653  df-sn 3674  df-pr 3675  df-op 3677  df-uni 3893  df-iun 3971  df-br 4088  df-opab 4150  df-xp 4730  df-cnv 4732  df-dm 4734  df-rn 4735  df-res 4736  df-ima 4737  df-ec 6706  df-qs 6710

This theorem is referenced by: (None)