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Mirrors > Home > MPE Home > Th. List > adantld | Structured version Visualization version GIF version |
Description: Deduction adding a conjunct to the left of an antecedent. (Contributed by NM, 4-May-1994.) (Proof shortened by Wolf Lammen, 20-Dec-2012.) |
Ref | Expression |
---|---|
adantld.1 | ⊢ (𝜑 → (𝜓 → 𝜒)) |
Ref | Expression |
---|---|
adantld | ⊢ (𝜑 → ((𝜃 ∧ 𝜓) → 𝜒)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpr 484 | . 2 ⊢ ((𝜃 ∧ 𝜓) → 𝜓) | |
2 | adantld.1 | . 2 ⊢ (𝜑 → (𝜓 → 𝜒)) | |
3 | 1, 2 | syl5 34 | 1 ⊢ (𝜑 → ((𝜃 ∧ 𝜓) → 𝜒)) |
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