Theorem ecopqsi 6854

Description: "Closure" law for equivalence class of ordered pairs. (Contributed by NM, 25-Mar-1996.)

Hypotheses

Ref	Expression
ecopqsi.1	|- R e. _V
ecopqsi.2	|- S = ( ( A X. A ) /. R )

Assertion

Ref	Expression
ecopqsi	|- ( ( B e. A /\ C e. A ) -> [ <. B , C >. ] R e. S )

Proof of Theorem ecopqsi

Step	Hyp	Ref	Expression
1		opelxpi 4801	. 2 |- ( ( B e. A /\ C e. A ) -> <. B , C >. e. ( A X. A ) )
2		ecopqsi.1	. . . 4 |- R e. _V
3	2	ecelqsi 6853	. . 3 |- ( <. B , C >. e. ( A X. A ) -> [ <. B , C >. ] R e. ( ( A X. A ) /. R ) )
4		ecopqsi.2	. . 3 |- S = ( ( A X. A ) /. R )
5	3, 4	eleqtrrdi 2332	. 2 |- ( <. B , C >. e. ( A X. A ) -> [ <. B , C >. ] R e. S )
6	1, 5	syl 14	1 |- ( ( B e. A /\ C e. A ) -> [ <. B , C >. ] R e. S )

Syntax hints:   -> wi 4   /\ wa 104   = wceq 1402   e. wcel 2209   _Vcvv 2821   <.cop 3708   X. cxp 4767   [cec 6795   /.cqs 6796

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  ax-un 4573

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-uni 3931  df-br 4126  df-opab 4188  df-xp 4775  df-cnv 4777  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782  df-ec 6799  df-qs 6803

This theorem is referenced by:  brecop  6889  recexgt0sr  8130  ltpsrprg  8160