Theorem wl-impchain-mp-1

Description: This theorem is in fact a copy of wl-luk-syl , and repeated here to demonstrate a recursive proof scheme. The number '1' in the theorem name indicates that a chain of length 1 is modified. (Contributed by Wolf Lammen, 6-Jul-2019) (New usage is discouraged.) (Proof modification is discouraged.)

	Ref	Expression
Hypotheses	wl-impchain-mp-1.a	|- ( ch -> ps )
	wl-impchain-mp-1.b	|- ( ps -> ph )
Assertion	wl-impchain-mp-1	|- ( ch -> ph )

Proof

Step	Hyp	Ref	Expression
1		wl-impchain-mp-1.a	|- ( ch -> ps )
2		wl-impchain-mp-1.b	|- ( ps -> ph )
3	2	wl-luk-imim2i	|- ( ( ch -> ps ) -> ( ch -> ph ) )
4	1 3	wl-impchain-mp-0	|- ( ch -> ph )