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Mirrors > Home > ILE Home > Th. List > biimp3ar | GIF version |
Description: Infer implication from a logical equivalence. Similar to biimpar 297. (Contributed by NM, 2-Jan-2009.) |
Ref | Expression |
---|---|
biimp3a.1 | ⊢ ((𝜑 ∧ 𝜓) → (𝜒 ↔ 𝜃)) |
Ref | Expression |
---|---|
biimp3ar | ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜃) → 𝜒) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | biimp3a.1 | . . 3 ⊢ ((𝜑 ∧ 𝜓) → (𝜒 ↔ 𝜃)) | |
2 | 1 | exbiri 382 | . 2 ⊢ (𝜑 → (𝜓 → (𝜃 → 𝜒))) |
3 | 2 | 3imp 1193 | 1 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜃) → 𝜒) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∧ 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: rmoi 3056 brelrng 4858 ssfzo12 10223 abssubge0 11110 qredeu 12096 basgen2 13517 logbprmirr 14326 lgssq 14377 lgssq2 14378 |
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