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Mirrors > Home > ILE Home > Th. List > 3anrot | GIF version |
Description: Rotation law for triple conjunction. (Contributed by NM, 8-Apr-1994.) |
Ref | Expression |
---|---|
3anrot | ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒) ↔ (𝜓 ∧ 𝜒 ∧ 𝜑)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ancom 253 | . 2 ⊢ ((𝜑 ∧ (𝜓 ∧ 𝜒)) ↔ ((𝜓 ∧ 𝜒) ∧ 𝜑)) | |
2 | 3anass 889 | . 2 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒) ↔ (𝜑 ∧ (𝜓 ∧ 𝜒))) | |
3 | df-3an 887 | . 2 ⊢ ((𝜓 ∧ 𝜒 ∧ 𝜑) ↔ ((𝜓 ∧ 𝜒) ∧ 𝜑)) | |
4 | 1, 2, 3 | 3bitr4i 201 | 1 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒) ↔ (𝜓 ∧ 𝜒 ∧ 𝜑)) |
Colors of variables: wff set class |
Syntax hints: ∧ wa 97 ↔ wb 98 ∧ w3a 885 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 |
This theorem depends on definitions: df-bi 110 df-3an 887 |
This theorem is referenced by: 3ancomb 893 3anrev 895 3simpc 903 caovlem2d 5693 nnmcan 6092 |
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