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| Mirrors > Home > MPE Home > Th. List > 3orrot | Structured version Visualization version GIF version | ||
| Description: Rotation law for triple disjunction. (Contributed by NM, 4-Apr-1995.) |
| Ref | Expression |
|---|---|
| 3orrot | ⊢ ((𝜑 ∨ 𝜓 ∨ 𝜒) ↔ (𝜓 ∨ 𝜒 ∨ 𝜑)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | orcom 884 | . 2 ⊢ ((𝜑 ∨ (𝜓 ∨ 𝜒)) ↔ ((𝜓 ∨ 𝜒) ∨ 𝜑)) | |
| 2 | 3orass 1106 | . 2 ⊢ ((𝜑 ∨ 𝜓 ∨ 𝜒) ↔ (𝜑 ∨ (𝜓 ∨ 𝜒))) | |
| 3 | df-3or 1104 | . 2 ⊢ ((𝜓 ∨ 𝜒 ∨ 𝜑) ↔ ((𝜓 ∨ 𝜒) ∨ 𝜑)) | |
| 4 | 1, 2, 3 | 3bitr4i 306 | 1 ⊢ ((𝜑 ∨ 𝜓 ∨ 𝜒) ↔ (𝜓 ∨ 𝜒 ∨ 𝜑)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∨ wo 861 ∨ w3o 1102 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
| This proof depends on definitions: df-bi 210 df-or 862 df-3or 1104 |
| This theorem is used by: 3orcomb 1110 3mix2 1350 3mix3 1351 3orel2OLD 1516 eueq3 3669 tprot 4710 wemapsolem 9522 ssxr 11303 elnnz 12625 elznn 12631 pfxnd0 14758 nolt02o 27931 nosupbnd2lem1 27951 colrot1 28901 lnrot1 28970 lnrot2 28971 dfon2lem5 36364 dfon2lem6 36365 colinearperm3 36643 wl-exeq 38297 dvasin 38453 frege129d 44603 usgrexmpl2nb0 48947 usgrexmpl2nb3 48950 |
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