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Axiom ax-ia1 103
Description: Left 'and' elimination. One of the axioms of propositional logic. Use its alias simpl 106 instead for naming consistency with set.mm. (New usage is discouraged.) (Contributed by Mario Carneiro, 31-Jan-2015.)
Assertion
Ref Expression
ax-ia1  |-  ( (
ph  /\  ps )  ->  ph )

Detailed syntax breakdown of Axiom ax-ia1
StepHypRef Expression
1 wph . . 3  wff  ph
2 wps . . 3  wff  ps
31, 2wa 101 . 2  wff  ( ph  /\ 
ps )
43, 1wi 4 1  wff  ( (
ph  /\  ps )  ->  ph )
Colors of variables: wff set class
This axiom is referenced by:  simpl  106
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