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| Mirrors > Home > ILE Home > Th. List > an4 | GIF version | ||
| Description: Rearrangement of 4 conjuncts. (Contributed by NM, 10-Jul-1994.) |
| Ref | Expression |
|---|---|
| an4 | ⊢ (((𝜑 ∧ 𝜓) ∧ (𝜒 ∧ 𝜃)) ↔ ((𝜑 ∧ 𝜒) ∧ (𝜓 ∧ 𝜃))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | an12 567 | . . 3 ⊢ ((𝜓 ∧ (𝜒 ∧ 𝜃)) ↔ (𝜒 ∧ (𝜓 ∧ 𝜃))) | |
| 2 | 1 | anbi2i 461 | . 2 ⊢ ((𝜑 ∧ (𝜓 ∧ (𝜒 ∧ 𝜃))) ↔ (𝜑 ∧ (𝜒 ∧ (𝜓 ∧ 𝜃)))) |
| 3 | anass 405 | . 2 ⊢ (((𝜑 ∧ 𝜓) ∧ (𝜒 ∧ 𝜃)) ↔ (𝜑 ∧ (𝜓 ∧ (𝜒 ∧ 𝜃)))) | |
| 4 | anass 405 | . 2 ⊢ (((𝜑 ∧ 𝜒) ∧ (𝜓 ∧ 𝜃)) ↔ (𝜑 ∧ (𝜒 ∧ (𝜓 ∧ 𝜃)))) | |
| 5 | 2, 3, 4 | 3bitr4i 212 | 1 ⊢ (((𝜑 ∧ 𝜓) ∧ (𝜒 ∧ 𝜃)) ↔ ((𝜑 ∧ 𝜒) ∧ (𝜓 ∧ 𝜃))) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ∧ wa 104 ↔ wb 105 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 |
| This proof depends on definitions: df-bi 117 |
| This theorem is used by: an42 593 an4s 596 anandi 598 anandir 599 rnlem 989 an6 1362 2eu4 2180 reean 2720 reu2 3014 rmo4 3019 rmo3f 3023 rmo3 3144 inxp 4916 xp11m 5229 fununi 5452 fun 5564 resoprab2 6188 xporderlem 6471 poxp 6472 th3qlem1 6916 enq0enq 7804 enq0tr 7807 genpdisj 7896 cju 9299 elfzo2 10573 iooinsup 12067 summodc 12174 prodmodc 12369 issubmd 13839 dvdsrtr 14516 domnmuln0 14690 txbasval 15510 txcnp 15514 txlm 15522 |
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