Theorem pm5.41 364

Description: Theorem *5.41 of [WhiteheadRussell] p. 125. (Contributed by NM, 3-Jan-2005.) (Proof shortened by Wolf Lammen, 12-Oct-2012.)

Assertion

Ref	Expression
pm5.41

Proof of Theorem pm5.41

Step	Hyp	Ref	Expression
1		imdi 363	. 2
2	1	bicomi 202	1

Syntax hints:  ->wi 4  <->wb 184

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