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Mirrors > Home > MPE Home > Th. List > jaob | Structured version Visualization version GIF version |
Description: Disjunction of antecedents. Compare Theorem *4.77 of [WhiteheadRussell] p. 121. (Contributed by NM, 30-May-1994.) (Proof shortened by Wolf Lammen, 9-Dec-2012.) |
Ref | Expression |
---|---|
jaob | ⊢ (((𝜑 ∨ 𝜒) → 𝜓) ↔ ((𝜑 → 𝜓) ∧ (𝜒 → 𝜓))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pm2.67-2 892 | . . 3 ⊢ (((𝜑 ∨ 𝜒) → 𝜓) → (𝜑 → 𝜓)) | |
2 | olc 868 | . . . 4 ⊢ (𝜒 → (𝜑 ∨ 𝜒)) | |
3 | 2 | imim1i 63 | . . 3 ⊢ (((𝜑 ∨ 𝜒) → 𝜓) → (𝜒 → 𝜓)) |
4 | 1, 3 | jca 515 | . 2 ⊢ (((𝜑 ∨ 𝜒) → 𝜓) → ((𝜑 → 𝜓) ∧ (𝜒 → 𝜓))) |
5 | pm3.44 960 | . 2 ⊢ (((𝜑 → 𝜓) ∧ (𝜒 → 𝜓)) → ((𝜑 ∨ 𝜒) → 𝜓)) | |
6 | 4, 5 | impbii 212 | 1 ⊢ (((𝜑 ∨ 𝜒) → 𝜓) ↔ ((𝜑 → 𝜓) ∧ (𝜒 → 𝜓))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ wa 399 ∨ wo 847 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 |
This theorem is referenced by: pm4.77 963 pm5.53 1005 pm4.83 1025 axio 2698 elunant 4092 intprg 4892 intprOLD 4894 relop 5719 sqrt2irr 15810 algcvgblem 16134 efgred 19138 caucfil 24180 plydivex 25190 2sqlem6 26304 arg-ax 34342 tendoeq2 38525 ifpidg 40783 |
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