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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 1009 sbidm 1899 4exdistr 1965 2sb5 2036 2sb5rf 2042 sbel2x 2051 r2exf 2551 r19.41 2689 ceqsex3v 2847 ceqsrex2v 2939 rexrab 2970 rexrab2 2974 rexss 3295 inass 3419 difin2 3471 difrab 3483 reupick3 3494 inssdif0im 3564 rexdifpr 3701 rexdifsn 3809 unidif0 4263 bnd2 4269 eqvinop 4341 copsexg 4342 uniuni 4554 rabxp 4769 elvvv 4795 rexiunxp 4878 resopab2 5066 ssrnres 5186 elxp4 5231 elxp5 5232 cnvresima 5233 mptpreima 5237 coass 5262 dff1o2 5597 eqfnfv3 5755 isoini 5969 f1oiso 5977 oprabid 6060 dfoprab2 6078 mpoeq123 6090 mpomptx 6122 resoprab2 6128 ovi3 6169 oprabex3 6300 spc2ed 6407 f1od2 6409 rexsupp 6431 brtpos2 6460 mapsnen 7029 xpsnen 7048 xpcomco 7053 xpassen 7057 ltexpi 7617 enq0enq 7711 enq0tr 7714 prnmaxl 7768 prnminu 7769 genpdflem 7787 ltexprlemm 7880 suplocsrlemb 8086 axaddf 8148 axmulf 8149 rexuz 9875 rexuz2 9876 rexrp 9972 elixx3g 10197 elfz2 10312 fzdifsuc 10378 fzind2 10548 divalgb 12566 gcdass 12666 nnwosdc 12690 lcmass 12737 isprm2 12769 infpn2 13157 fngsum 13551 igsumvalx 13552 issubg3 13859 dfrhm2 14249 ntreq0 14943 tx1cn 15080 tx2cn 15081 blres 15245 metrest 15317 elcncf1di 15390 dedekindicclemicc 15443 fsumdvdsmul 15805 lgsquadlem1 15896 lgsquadlem2 15897 wlk1walkdom 16300 isclwwlk 16335 isclwwlknx 16357 clwwlknonel 16373 clwwlknon2x 16376 iseupthf1o 16389 |
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