Theorem anc2li 540

Description: Deduction conjoining antecedent to left of consequent in nested implication. (Contributed by NM, 10-Aug-1994.) (Proof shortened by Wolf Lammen, 7-Dec-2012.)

Hypothesis

Ref	Expression
anc2li.1	|- (ph -> (ps -> ch))

Assertion

Ref	Expression
anc2li	|- (ph -> (ps -> (ph /\ ch)))

Proof of Theorem anc2li

Step	Hyp	Ref	Expression
1		anc2li.1	. 2 |- (ph -> (ps -> ch))
2		id 19	. 2 |- (ph -> ph)
3	1, 2	jctild 527	1 |- (ph -> (ps -> (ph /\ ch)))

Syntax hints:   -> wi 4   /\ wa 358

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This theorem depends on definitions:  df-bi 177  df-an 360

This theorem is referenced by:  imdistani  671  equvini  1987  pwpw0  3856  sssn  3865  pwsnALT  3883