Theorem ralprg 3610

Description: Convert a quantification over a pair to a conjunction. (Contributed by NM, 17-Sep-2011.) (Revised by Mario Carneiro, 23-Apr-2015.)

Hypotheses

Ref	Expression
ralprg.1	|- ( x = A -> ( ph <-> ps ) )
ralprg.2	|- ( x = B -> ( ph <-> ch ) )

Assertion

Ref	Expression
ralprg	|- ( ( A e. V /\ B e. W ) -> ( A. x e. { A , B } ph <-> ( ps /\ ch ) ) )

Distinct variable groups:   x, A   x, B   ps, x   ch, x

Allowed substitution hints:   ph( x)   V( x)   W( x)

Proof of Theorem ralprg

Step	Hyp	Ref	Expression
1		df-pr 3567	. . . 4 |- { A , B } = ( { A } u. { B } )
2	1	raleqi 2656	. . 3 |- ( A. x e. { A , B } ph <-> A. x e. ( { A } u. { B } ) ph )
3		ralunb 3288	. . 3 |- ( A. x e. ( { A } u. { B } ) ph <-> ( A. x e. { A } ph /\ A. x e. { B } ph ) )
4	2, 3	bitri 183	. 2 |- ( A. x e. { A , B } ph <-> ( A. x e. { A } ph /\ A. x e. { B } ph ) )
5		ralprg.1	. . . 4 |- ( x = A -> ( ph <-> ps ) )
6	5	ralsng 3599	. . 3 |- ( A e. V -> ( A. x e. { A } ph <-> ps ) )
7		ralprg.2	. . . 4 |- ( x = B -> ( ph <-> ch ) )
8	7	ralsng 3599	. . 3 |- ( B e. W -> ( A. x e. { B } ph <-> ch ) )
9	6, 8	bi2anan9 596	. 2 |- ( ( A e. V /\ B e. W ) -> ( ( A. x e. { A } ph /\ A. x e. { B } ph ) <-> ( ps /\ ch ) ) )
10	4, 9	syl5bb 191	1 |- ( ( A e. V /\ B e. W ) -> ( A. x e. { A , B } ph <-> ( ps /\ ch ) ) )

Syntax hints:   -> wi 4   /\ wa 103   <-> wb 104   = wceq 1335   e. wcel 2128   A.wral 2435   u. cun 3100   {csn 3560   {cpr 3561

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1427  ax-7 1428  ax-gen 1429  ax-ie1 1473  ax-ie2 1474  ax-8 1484  ax-10 1485  ax-11 1486  ax-i12 1487  ax-bndl 1489  ax-4 1490  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2139

This theorem depends on definitions:  df-bi 116  df-3an 965  df-tru 1338  df-nf 1441  df-sb 1743  df-clab 2144  df-cleq 2150  df-clel 2153  df-nfc 2288  df-ral 2440  df-v 2714  df-sbc 2938  df-un 3106  df-sn 3566  df-pr 3567

This theorem is referenced by:  raltpg  3612  ralpr  3614  iinxprg  3923  fvinim0ffz  10133  sumpr  11303