Theorem ax1 1591

Description: Standard propositional axiom derived from Lukasiewicz axioms. (Contributed by NM, 22-Dec-2002.) (Proof modification is discouraged.) (New usage is discouraged.)

Assertion

Ref	Expression
ax1	|- ( ph -> ( ps -> ph ) )

Proof of Theorem ax1

Step	Hyp	Ref	Expression
1		luklem5 1587	1 |- ( ph -> ( ps -> ph ) )

Syntax hints:   -> wi 4

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

This theorem is referenced by: (None)