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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 563 an32 564 an13 565 an31 566 an4 588 3anass 1008 sbidm 1899 4exdistr 1965 2sb5 2036 2sb5rf 2042 sbel2x 2051 r2exf 2550 r19.41 2688 ceqsex3v 2846 ceqsrex2v 2938 rexrab 2969 rexrab2 2973 rexss 3294 inass 3417 difin2 3469 difrab 3481 reupick3 3492 inssdif0im 3562 rexdifpr 3697 rexdifsn 3805 unidif0 4257 bnd2 4263 eqvinop 4335 copsexg 4336 uniuni 4548 rabxp 4763 elvvv 4789 rexiunxp 4872 resopab2 5060 ssrnres 5179 elxp4 5224 elxp5 5225 cnvresima 5226 mptpreima 5230 coass 5255 dff1o2 5588 eqfnfv3 5746 rexsupp 5771 isoini 5958 f1oiso 5966 oprabid 6049 dfoprab2 6067 mpoeq123 6079 mpomptx 6111 resoprab2 6117 ovi3 6158 oprabex3 6290 spc2ed 6397 f1od2 6399 brtpos2 6416 mapsnen 6985 xpsnen 7004 xpcomco 7009 xpassen 7013 ltexpi 7556 enq0enq 7650 enq0tr 7653 prnmaxl 7707 prnminu 7708 genpdflem 7726 ltexprlemm 7819 suplocsrlemb 8025 axaddf 8087 axmulf 8088 rexuz 9813 rexuz2 9814 rexrp 9910 elixx3g 10135 elfz2 10249 fzdifsuc 10315 fzind2 10484 divalgb 12485 gcdass 12585 nnwosdc 12609 lcmass 12656 isprm2 12688 infpn2 13076 fngsum 13470 igsumvalx 13471 issubg3 13778 dfrhm2 14167 ntreq0 14855 tx1cn 14992 tx2cn 14993 blres 15157 metrest 15229 elcncf1di 15302 dedekindicclemicc 15355 fsumdvdsmul 15714 lgsquadlem1 15805 lgsquadlem2 15806 wlk1walkdom 16209 isclwwlk 16244 isclwwlknx 16266 clwwlknonel 16282 clwwlknon2x 16285 iseupthf1o 16298 |
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