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Mirrors > Home > MPE Home > Th. List > 3orim123d | Structured version Visualization version GIF version |
Description: Deduction joining 3 implications to form implication of disjunctions. (Contributed by NM, 4-Apr-1997.) |
Ref | Expression |
---|---|
3anim123d.1 | ⊢ (𝜑 → (𝜓 → 𝜒)) |
3anim123d.2 | ⊢ (𝜑 → (𝜃 → 𝜏)) |
3anim123d.3 | ⊢ (𝜑 → (𝜂 → 𝜁)) |
Ref | Expression |
---|---|
3orim123d | ⊢ (𝜑 → ((𝜓 ∨ 𝜃 ∨ 𝜂) → (𝜒 ∨ 𝜏 ∨ 𝜁))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3anim123d.1 | . . . 4 ⊢ (𝜑 → (𝜓 → 𝜒)) | |
2 | 3anim123d.2 | . . . 4 ⊢ (𝜑 → (𝜃 → 𝜏)) | |
3 | 1, 2 | orim12d 966 | . . 3 ⊢ (𝜑 → ((𝜓 ∨ 𝜃) → (𝜒 ∨ 𝜏))) |
4 | 3anim123d.3 | . . 3 ⊢ (𝜑 → (𝜂 → 𝜁)) | |
5 | 3, 4 | orim12d 966 | . 2 ⊢ (𝜑 → (((𝜓 ∨ 𝜃) ∨ 𝜂) → ((𝜒 ∨ 𝜏) ∨ 𝜁))) |
6 | df-3or 1087 | . 2 ⊢ ((𝜓 ∨ 𝜃 ∨ 𝜂) ↔ ((𝜓 ∨ 𝜃) ∨ 𝜂)) | |
7 | df-3or 1087 | . 2 ⊢ ((𝜒 ∨ 𝜏 ∨ 𝜁) ↔ ((𝜒 ∨ 𝜏) ∨ 𝜁)) | |
8 | 5, 6, 7 | 3imtr4g 296 | 1 ⊢ (𝜑 → ((𝜓 ∨ 𝜃 ∨ 𝜂) → (𝜒 ∨ 𝜏 ∨ 𝜁))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∨ wo 847 ∨ w3o 1085 |
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 207 df-an 396 df-or 848 df-3or 1087 |
This theorem is referenced by: fr3nr 7790 soxp 8152 poxp3 8173 zorn2lem6 10538 fpwwe2lem11 10678 fpwwe2lem12 10679 sltres 27721 colinearalglem4 28938 chnso 32987 constrconj 33749 colinearxfr 36056 weiunso 36448 fin2so 37593 frege133d 43754 el1fzopredsuc 47274 fmtno4prmfac 47496 |
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