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Theorem pm3.21 435
Description: Join antecedents with conjunction. Theorem *3.21 of [WhiteheadRussell] p. 111. (Contributed by NM, 5-Aug-1993.)
Assertion
Ref Expression
pm3.21

Proof of Theorem pm3.21
StepHypRef Expression
1 pm3.2 434 . 2
21com12 27 1
Colors of variables: wff setvar class
Syntax hints:   wi 4   wa 358
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 177  df-an 360
This theorem is referenced by:  pm3.22  436  iba  489  ancr  532  anc2r  539  pm5.31  571  19.41  1879  2mo  2282
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