Theorem re1tbw3 1580

Description: tbw-ax3 1535 rederived from merco2 1569. (Contributed by Anthony Hart, 16-Aug-2011.) (Proof modification is discouraged.) (New usage is discouraged.)

Assertion

Ref	Expression
re1tbw3

Proof of Theorem re1tbw3

Step	Hyp	Ref	Expression
1		mercolem2 1571	. 2
2		mercolem2 1571	. . 3
3		mercolem6 1575	. . 3
4	2, 3	ax-mp 5	. 2
5	1, 4	ax-mp 5	1

Syntax hints:  ->wi 4

This theorem is referenced by:  re1tbw4  1581

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 185  df-tru 1398  df-fal 1401