Theorem ecopqsi 6802

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 4763	. 2 |- ( ( B e. A /\ C e. A ) -> <. B , C >. e. ( A X. A ) )
2		ecopqsi.1	. . . 4 |- R e. _V
3	2	ecelqsi 6801	. . 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 2325	. 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 1398   e. wcel 2202   _Vcvv 2803   <.cop 3676   X. cxp 4729   [cec 6743   /.cqs 6744

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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4212  ax-pow 4270  ax-pr 4305  ax-un 4536

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ral 2516  df-rex 2517  df-v 2805  df-un 3205  df-in 3207  df-ss 3214  df-pw 3658  df-sn 3679  df-pr 3680  df-op 3682  df-uni 3899  df-br 4094  df-opab 4156  df-xp 4737  df-cnv 4739  df-dm 4741  df-rn 4742  df-res 4743  df-ima 4744  df-ec 6747  df-qs 6751

This theorem is referenced by:  brecop  6837  recexgt0sr  8053  ltpsrprg  8083