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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 |
| This proof depends on syntax axioms: ∧ wa 104 ↔ wb 105 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 |
| This proof depends on definitions: df-bi 117 |
| This theorem is used 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 inssdif0imOLD 3593 rexdifpr 3737 rexdifsn 3846 unidif0 4304 bnd2 4310 eqvinop 4383 copsexg 4384 uniuni 4597 rabxp 4812 elvvv 4838 rexiunxp 4922 resopab2 5110 ssrnres 5230 elxp4 5275 elxp5 5276 cnvresima 5277 mptpreima 5281 coass 5306 dff1o2 5644 eqfnfv3 5808 isoini 6024 f1oiso 6032 oprabid 6117 dfoprab2 6135 mpoeq123 6147 mpomptx 6179 resoprab2 6185 ovi3 6226 oprabex3 6362 spc2ed 6469 f1od2 6471 rexsupp 6493 brtpos2 6522 mapsnend 7099 mapsnen 7100 xpsnen 7119 xpcomco 7124 xpassen 7128 ltexpi 7705 enq0enq 7799 enq0tr 7802 prnmaxl 7856 prnminu 7857 genpdflem 7875 ltexprlemm 7968 suplocsrlemb 8174 axaddf 8236 axmulf 8237 rexuz 9990 rexuz2 9991 rexrp 10088 elixx3g 10314 elfz2 10429 fzdifsuc 10499 fzind2 10669 sseqn 11295 hashfibclem 11298 divalgb 12711 gcdass 12811 nnwosdc 12835 lcmass 12882 isprm2 12914 infpn2 13399 fngzsum 13761 gzsumvalx 13762 issubg3 14048 resscntz 14160 dfrhm2 14545 ntreq0 15324 tx1cn 15461 tx2cn 15462 blres 15626 metrest 15698 elcncf1di 15771 dedekindicclemicc 15824 fsumdvdsmul 16246 lgsquadlem1 16362 lgsquadlem2 16363 wlk1walkdom 16766 isclwwlk 16801 isclwwlknx 16823 clwwlknonel 16839 clwwlknon2x 16842 iseupthf1o 16855 alsanmo 17318 ralsanmo 17319 2alsraln0m 17325 |
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