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| Mirrors > Home > ILE Home > Th. List > anass | GIF version | ||
| Description: Associative law for conjunction. Theorem *4.32 of [WhiteheadRussell] p. 118. (Contributed by NM, 5-Aug-1993.) (Proof shortened by Wolf Lammen, 24-Nov-2012.) |
| Ref | Expression |
|---|---|
| anass | ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) ↔ (𝜑 ∧ (𝜓 ∧ 𝜒))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 19 | . . 3 ⊢ ((𝜑 ∧ (𝜓 ∧ 𝜒)) → (𝜑 ∧ (𝜓 ∧ 𝜒))) | |
| 2 | 1 | anassrs 400 | . 2 ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) → (𝜑 ∧ (𝜓 ∧ 𝜒))) |
| 3 | id 19 | . . 3 ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) → ((𝜑 ∧ 𝜓) ∧ 𝜒)) | |
| 4 | 3 | anasss 399 | . 2 ⊢ ((𝜑 ∧ (𝜓 ∧ 𝜒)) → ((𝜑 ∧ 𝜓) ∧ 𝜒)) |
| 5 | 2, 4 | impbii 126 | 1 ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) ↔ (𝜑 ∧ (𝜓 ∧ 𝜒))) |
| 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: bianass 469 mpan10 474 an12 561 an32 562 an13 563 an31 564 an4 586 3anass 1006 sbidm 1897 4exdistr 1963 2sb5 2034 2sb5rf 2040 sbel2x 2049 r2exf 2548 r19.41 2686 ceqsex3v 2844 ceqsrex2v 2936 rexrab 2967 rexrab2 2971 rexss 3292 inass 3415 difin2 3467 difrab 3479 reupick3 3490 inssdif0im 3560 rexdifpr 3695 rexdifsn 3803 unidif0 4255 bnd2 4261 eqvinop 4333 copsexg 4334 uniuni 4546 rabxp 4761 elvvv 4787 rexiunxp 4870 resopab2 5058 ssrnres 5177 elxp4 5222 elxp5 5223 cnvresima 5224 mptpreima 5228 coass 5253 dff1o2 5585 eqfnfv3 5742 rexsupp 5767 isoini 5954 f1oiso 5962 oprabid 6045 dfoprab2 6063 mpoeq123 6075 mpomptx 6107 resoprab2 6113 ovi3 6154 oprabex3 6286 spc2ed 6393 f1od2 6395 brtpos2 6412 mapsnen 6981 xpsnen 7000 xpcomco 7005 xpassen 7009 ltexpi 7547 enq0enq 7641 enq0tr 7644 prnmaxl 7698 prnminu 7699 genpdflem 7717 ltexprlemm 7810 suplocsrlemb 8016 axaddf 8078 axmulf 8079 rexuz 9804 rexuz2 9805 rexrp 9901 elixx3g 10126 elfz2 10240 fzdifsuc 10306 fzind2 10475 divalgb 12476 gcdass 12576 nnwosdc 12600 lcmass 12647 isprm2 12679 infpn2 13067 fngsum 13461 igsumvalx 13462 issubg3 13769 dfrhm2 14158 ntreq0 14846 tx1cn 14983 tx2cn 14984 blres 15148 metrest 15220 elcncf1di 15293 dedekindicclemicc 15346 fsumdvdsmul 15705 lgsquadlem1 15796 lgsquadlem2 15797 wlk1walkdom 16156 isclwwlk 16189 isclwwlknx 16211 clwwlknonel 16227 clwwlknon2x 16230 iseupthf1o 16243 |
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