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Axiom ax-ia1 98
Description: Left 'and' elimination. Axiom 1 of 10 for intuitionistic logic.
Assertion
Ref Expression
ax-ia1 ((φ ψ) → φ)

Detailed syntax breakdown of Axiom ax-ia1
StepHypRef Expression
1 wph . . 3 wff φ
2 wps . . 3 wff ψ
31, 2wa 96 . 2 wff (φ ψ)
43, 1wi 4 1 wff ((φ ψ) → φ)
Colors of variables: wff set class
This axiom is referenced by:  simpl  101
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