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Mirrors > Home > ILE Home > Th. List > simpll | GIF version |
Description: Simplification of a conjunction. (Contributed by NM, 18-Mar-2007.) |
Ref | Expression |
---|---|
simpll | ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) → 𝜑) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 19 | . 2 ⊢ (𝜑 → 𝜑) | |
2 | 1 | ad2antrr 480 | 1 ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) → 𝜑) |
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