Theorem anandi3r 980

Description: Distribution of triple conjunction over conjunction. (Contributed by David A. Wheeler, 4-Nov-2018.)

Assertion

Ref	Expression
anandi3r	|- ( ( ph /\ ps /\ ch ) <-> ( ( ph /\ ps ) /\ ( ch /\ ps ) ) )

Proof of Theorem anandi3r

Step	Hyp	Ref	Expression
1		3anan32 977	. 2 |- ( ( ph /\ ps /\ ch ) <-> ( ( ph /\ ch ) /\ ps ) )
2		anandir 825	. 2 |- ( ( ( ph /\ ch ) /\ ps ) <-> ( ( ph /\ ps ) /\ ( ch /\ ps ) ) )
3	1, 2	bitri 249	1 |- ( ( ph /\ ps /\ ch ) <-> ( ( ph /\ ps ) /\ ( ch /\ ps ) ) )

Syntax hints:   <-> wb 184   /\ wa 369   /\ w3a 965

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-an 371  df-3an 967

This theorem is referenced by:  alsi-no-surprise  31481