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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 404 | . 2 ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) → (𝜑 ∧ (𝜓 ∧ 𝜒))) |
| 3 | id 19 | . . 3 ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) → ((𝜑 ∧ 𝜓) ∧ 𝜒)) | |
| 4 | 3 | anasss 403 | . 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 473 mpan10 478 an12 567 an32 568 an13 569 an31 570 an4 592 3anass 1013 sbidm 1904 4exdistr 1972 2sb5 2043 2sb5rf 2049 sbel2x 2058 r2exf 2568 r19.41 2706 ceqsex3v 2865 ceqsrex2v 2958 rexrab 2989 rexrab2 2993 rexss 3315 inass 3441 difin2 3493 difrab 3507 reupick3 3518 inssdif0im 3591 rexdifpr 3733 rexdifsn 3841 unidif0 4299 bnd2 4305 eqvinop 4378 copsexg 4379 uniuni 4592 rabxp 4807 elvvv 4833 rexiunxp 4917 resopab2 5105 ssrnres 5225 elxp4 5270 elxp5 5271 cnvresima 5272 mptpreima 5276 coass 5301 dff1o2 5639 eqfnfv3 5799 isoini 6014 f1oiso 6022 oprabid 6107 dfoprab2 6125 mpoeq123 6137 mpomptx 6169 resoprab2 6175 ovi3 6216 oprabex3 6352 spc2ed 6459 f1od2 6461 rexsupp 6483 brtpos2 6512 mapsnend 7089 mapsnen 7090 xpsnen 7109 xpcomco 7114 xpassen 7118 ltexpi 7694 enq0enq 7788 enq0tr 7791 prnmaxl 7845 prnminu 7846 genpdflem 7864 ltexprlemm 7957 suplocsrlemb 8163 axaddf 8225 axmulf 8226 rexuz 9959 rexuz2 9960 rexrp 10056 elixx3g 10282 elfz2 10397 fzdifsuc 10466 fzind2 10636 sseqn 11257 hashfibclem 11260 divalgb 12670 gcdass 12770 nnwosdc 12794 lcmass 12841 isprm2 12873 infpn2 13325 fngzsum 13685 gzsumvalx 13686 issubg3 13972 dfrhm2 14434 ntreq0 15156 tx1cn 15293 tx2cn 15294 blres 15458 metrest 15530 elcncf1di 15603 dedekindicclemicc 15656 fsumdvdsmul 16019 lgsquadlem1 16110 lgsquadlem2 16111 wlk1walkdom 16514 isclwwlk 16549 isclwwlknx 16571 clwwlknonel 16587 clwwlknon2x 16590 iseupthf1o 16603 |
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