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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 eueq3 3672 tprot 4712 wemapsolem 9581 ssxr 11418 elnnz 12743 elznn 12749 pfxnd0 14880 nolt02o 28109 nosupbnd2lem1 28129 colrot1 29079 lnrot1 29148 lnrot2 29149 dfon2lem5 36764 dfon2lem6 36765 colinearperm3 37043 wl-exeq 38734 dvasin 38890 frege129d 45024 usgrexmpl2nb0 49402 usgrexmpl2nb3 49405 |
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