Theorem anc2ri

Description: Deduction conjoining antecedent to right of consequent in nested implication. (Contributed by NM, 15-Aug-1994) (Proof shortened by Wolf Lammen, 7-Dec-2012)

	Ref	Expression
Hypothesis	anc2ri.1	|- ( ph -> ( ps -> ch ) )
Assertion	anc2ri	|- ( ph -> ( ps -> ( ch /\ ph ) ) )

Proof

Step	Hyp	Ref	Expression
1		anc2ri.1	|- ( ph -> ( ps -> ch ) )
2		id	|- ( ph -> ph )
3	1 2	jctird	|- ( ph -> ( ps -> ( ch /\ ph ) ) )