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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 561 | . . 3 ⊢ ((𝜓 ∧ (𝜒 ∧ 𝜃)) ↔ (𝜒 ∧ (𝜓 ∧ 𝜃))) | |
2 | 1 | anbi2i 457 | . 2 ⊢ ((𝜑 ∧ (𝜓 ∧ (𝜒 ∧ 𝜃))) ↔ (𝜑 ∧ (𝜒 ∧ (𝜓 ∧ 𝜃)))) |
3 | anass 401 | . 2 ⊢ (((𝜑 ∧ 𝜓) ∧ (𝜒 ∧ 𝜃)) ↔ (𝜑 ∧ (𝜓 ∧ (𝜒 ∧ 𝜃)))) | |
4 | anass 401 | . 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 |
Syntax hints: ∧ wa 104 ↔ wb 105 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 |
This theorem depends on definitions: df-bi 117 |
This theorem is referenced by: an42 587 an4s 588 anandi 590 anandir 591 rnlem 976 an6 1321 2eu4 2119 reean 2645 reu2 2925 rmo4 2930 rmo3f 2934 rmo3 3054 inxp 4760 xp11m 5066 fununi 5283 fun 5387 resoprab2 5969 xporderlem 6229 poxp 6230 th3qlem1 6634 enq0enq 7427 enq0tr 7430 genpdisj 7519 cju 8914 elfzo2 10145 iooinsup 11278 summodc 11384 prodmodc 11579 issubmd 12797 dvdsrtr 13201 txbasval 13638 txcnp 13642 txlm 13650 |
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