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Mirrors > Home > MPE Home > Th. List > simprd | Structured version Visualization version GIF version |
Description: Deduction eliminating a conjunct. (Contributed by NM, 14-May-1993.) A translation of natural deduction rule ∧ ER (∧ elimination right), see natded 28668. (Proof shortened by Wolf Lammen, 3-Oct-2013.) |
Ref | Expression |
---|---|
simprd.1 | ⊢ (𝜑 → (𝜓 ∧ 𝜒)) |
Ref | Expression |
---|---|
simprd | ⊢ (𝜑 → 𝜒) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simprd.1 | . . 3 ⊢ (𝜑 → (𝜓 ∧ 𝜒)) | |
2 | 1 | ancomd 461 | . 2 ⊢ (𝜑 → (𝜒 ∧ 𝜓)) |
3 | 2 | simpld 494 | 1 ⊢ (𝜑 → 𝜒) |
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