Theorem ax3 1501

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
ax3

Proof of Theorem ax3

Step	Hyp	Ref	Expression
1		luklem2 1492	. 2
2		luklem4 1494	. 2
3	1, 2	luklem1 1491	1

Syntax hints:  -.wn 3  ->wi 4

This theorem was proved from axioms:  ax-mp 5  ax-meredith 1474