Theorem rsp2 2371

Description: Restricted specialization. (Contributed by NM, 11-Feb-1997.)

Assertion

Ref	Expression
rsp2	|- ( A. x e. A A. y e. B ph -> ( ( x e. A /\ y e. B ) -> ph ) )

Proof of Theorem rsp2

Step	Hyp	Ref	Expression
1		rsp 2369	. . 3 |- ( A. x e. A A. y e. B ph -> ( x e. A -> A. y e. B ph ) )
2		rsp 2369	. . 3 |- ( A. y e. B ph -> ( y e. B -> ph ) )
3	1, 2	syl6 29	. 2 |- ( A. x e. A A. y e. B ph -> ( x e. A -> ( y e. B -> ph ) ) )
4	3	impd 242	1 |- ( A. x e. A A. y e. B ph -> ( ( x e. A /\ y e. B ) -> ph ) )

Syntax hints:   -> wi 4   /\ wa 97   e. wcel 1393   A.wral 2306

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-4 1400

This theorem depends on definitions:  df-bi 110  df-ral 2311

This theorem is referenced by:  ralidm  3321  sowlin  4057