Theorem jaob 722

Description: Disjunction of antecedents. Compare Theorem *4.77 of [WhiteheadRussell] p. 121. Alias of ax-io 721. (Contributed by NM, 30-May-1994.) (Revised by Mario Carneiro, 31-Jan-2015.)

Assertion

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

Proof of Theorem jaob

Step	Hyp	Ref	Expression
1		ax-io 721	1 |- ( ( ( ph \/ ch ) -> ps ) <-> ( ( ph -> ps ) /\ ( ch -> ps ) ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   \/ wo 720

This theorem was proved from axioms:  ax-io 721

This theorem is referenced by:  olc  723  orc  724  pm3.44  727  pm4.77  811  pm5.53  814  unss  3403  ralunb  3410  intun  3996  intpr  3997  relop  4925  indstr  9972  algcvgblem  12805  sqrt2irr  12918  2sqlem6  16153  bj-inf2vnlem1  16910