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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 9537 ssxr 11372 elnnz 12696 elznn 12702 pfxnd0 14831 nolt02o 28045 nosupbnd2lem1 28065 colrot1 29015 lnrot1 29084 lnrot2 29085 dfon2lem5 36529 dfon2lem6 36530 colinearperm3 36808 wl-exeq 38446 dvasin 38602 frege129d 44748 usgrexmpl2nb0 49098 usgrexmpl2nb3 49101 |
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