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Mirrors > Home > MPE Home > Th. List > biimpar | Structured version Visualization version GIF version |
Description: Importation inference from a logical equivalence. (Contributed by NM, 3-May-1994.) |
Ref | Expression |
---|---|
biimpa.1 | ⊢ (𝜑 → (𝜓 ↔ 𝜒)) |
Ref | Expression |
---|---|
biimpar | ⊢ ((𝜑 ∧ 𝜒) → 𝜓) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | biimpa.1 | . . 3 ⊢ (𝜑 → (𝜓 ↔ 𝜒)) | |
2 | 1 | biimprd 247 | . 2 ⊢ (𝜑 → (𝜒 → 𝜓)) |
3 | 2 | imp 407 | 1 ⊢ ((𝜑 ∧ 𝜒) → 𝜓) |
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