Theorem bisymOLD 290

Description: Obsolete theorem as of 27-May-2019. (Contributed by Wolf Lammen, 14-May-2013.) (Proof modification is discouraged.) (New usage is discouraged.)

Assertion

Ref	Expression
bisymOLD

Proof of Theorem bisymOLD

Step	Hyp	Ref	Expression
1		bi3 187	. 2
2	1	bi3antOLD 289	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