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Mirrors > Home > MPE Home > Th. List > mpbir2an | Structured version Visualization version GIF version |
Description: Detach a conjunction of truths in a biconditional. (Contributed by NM, 10-May-2005.) |
Ref | Expression |
---|---|
mpbir2an.1 | ⊢ 𝜓 |
mpbir2an.2 | ⊢ 𝜒 |
mpbir2an.maj | ⊢ (𝜑 ↔ (𝜓 ∧ 𝜒)) |
Ref | Expression |
---|---|
mpbir2an | ⊢ 𝜑 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mpbir2an.2 | . 2 ⊢ 𝜒 | |
2 | mpbir2an.1 | . . 3 ⊢ 𝜓 | |
3 | mpbir2an.maj | . . 3 ⊢ (𝜑 ↔ (𝜓 ∧ 𝜒)) | |
4 | 2, 3 | mpbiran 705 | . 2 ⊢ (𝜑 ↔ 𝜒) |
5 | 1, 4 | mpbir 230 | 1 ⊢ 𝜑 |
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