Theorem hband 1482

Description: Deduction form of bound-variable hypothesis builder hban 1540. (Contributed by NM, 2-Jan-2002.)

Hypotheses

Ref	Expression
hband.1	|- ( ph -> ( ps -> A. x ps ) )
hband.2	|- ( ph -> ( ch -> A. x ch ) )

Assertion

Ref	Expression
hband	|- ( ph -> ( ( ps /\ ch ) -> A. x ( ps /\ ch ) ) )

Proof of Theorem hband

Step	Hyp	Ref	Expression
1		hband.1	. . 3 |- ( ph -> ( ps -> A. x ps ) )
2		hband.2	. . 3 |- ( ph -> ( ch -> A. x ch ) )
3	1, 2	anim12d 333	. 2 |- ( ph -> ( ( ps /\ ch ) -> ( A. x ps /\ A. x ch ) ) )
4		19.26 1474	. 2 |- ( A. x ( ps /\ ch ) <-> ( A. x ps /\ A. x ch ) )
5	3, 4	syl6ibr 161	1 |- ( ph -> ( ( ps /\ ch ) -> A. x ( ps /\ ch ) ) )

Syntax hints:   -> wi 4   /\ wa 103   A.wal 1346

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-5 1440  ax-gen 1442

This theorem depends on definitions:  df-bi 116

This theorem is referenced by: (None)