Theorem pm3.21 251

Description: Join antecedents with conjunction. Theorem *3.21 of [WhiteheadRussell] p. 111. (Contributed by NM, 5-Aug-1993.)

Assertion

Ref	Expression
pm3.21	|- ( ph -> ( ps -> ( ps /\ ph ) ) )

Proof of Theorem pm3.21

Step	Hyp	Ref	Expression
1		pm3.2 126	. 2 |- ( ps -> ( ph -> ( ps /\ ph ) ) )
2	1	com12 27	1 |- ( ph -> ( ps -> ( ps /\ ph ) ) )

Syntax hints:   -> wi 4   /\ wa 97

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia3 101

This theorem is referenced by:  pm3.22  252  iba  284  ancr  304  anc2r  311  pm5.31  330  xoranor  1268  19.41h  1575  19.41  1576  ltsopr  6694  bj-findis  10104