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Mirrors > Home > ILE Home > Th. List > 3anidm23 | GIF version |
Description: Inference from idempotent law for conjunction. (Contributed by NM, 1-Feb-2007.) |
Ref | Expression |
---|---|
3anidm23.1 | ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜓) → 𝜒) |
Ref | Expression |
---|---|
3anidm23 | ⊢ ((𝜑 ∧ 𝜓) → 𝜒) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3anidm23.1 | . . 3 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜓) → 𝜒) | |
2 | 1 | 3expa 1203 | . 2 ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜓) → 𝜒) |
3 | 2 | anabss3 585 | 1 ⊢ ((𝜑 ∧ 𝜓) → 𝜒) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 104 ∧ w3a 978 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 |
This theorem depends on definitions: df-bi 117 df-3an 980 |
This theorem is referenced by: efrirr 4353 subeq0 8181 halfaddsub 9151 avglt2 9156 efsub 11684 sinmul 11747 pythagtriplem4 12262 pythagtriplem16 12273 xmet0 13756 |
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