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Mirrors > Home > MPE Home > Th. List > mpbir3and | Structured version Visualization version GIF version |
Description: Detach a conjunction of truths in a biconditional. (Contributed by Mario Carneiro, 11-May-2014.) (Revised by Mario Carneiro, 9-Jan-2015.) |
Ref | Expression |
---|---|
mpbir3and.1 | ⊢ (𝜑 → 𝜒) |
mpbir3and.2 | ⊢ (𝜑 → 𝜃) |
mpbir3and.3 | ⊢ (𝜑 → 𝜏) |
mpbir3and.4 | ⊢ (𝜑 → (𝜓 ↔ (𝜒 ∧ 𝜃 ∧ 𝜏))) |
Ref | Expression |
---|---|
mpbir3and | ⊢ (𝜑 → 𝜓) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mpbir3and.1 | . . 3 ⊢ (𝜑 → 𝜒) | |
2 | mpbir3and.2 | . . 3 ⊢ (𝜑 → 𝜃) | |
3 | mpbir3and.3 | . . 3 ⊢ (𝜑 → 𝜏) | |
4 | 1, 2, 3 | 3jca 1127 | . 2 ⊢ (𝜑 → (𝜒 ∧ 𝜃 ∧ 𝜏)) |
5 | mpbir3and.4 | . 2 ⊢ (𝜑 → (𝜓 ↔ (𝜒 ∧ 𝜃 ∧ 𝜏))) | |
6 | 4, 5 | mpbird 256 | 1 ⊢ (𝜑 → 𝜓) |
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