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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 7704 enq0enq 7798 enq0tr 7801 prnmaxl 7855 prnminu 7856 genpdflem 7874 ltexprlemm 7967 suplocsrlemb 8173 axaddf 8235 axmulf 8236 rexuz 9989 rexuz2 9990 rexrp 10087 elixx3g 10313 elfz2 10428 fzdifsuc 10498 fzind2 10668 sseqn 11293 hashfibclem 11296 divalgb 12708 gcdass 12808 nnwosdc 12832 lcmass 12879 isprm2 12911 infpn2 13396 fngzsum 13757 gzsumvalx 13758 issubg3 14044 dfrhm2 14510 ntreq0 15282 tx1cn 15419 tx2cn 15420 blres 15584 metrest 15656 elcncf1di 15729 dedekindicclemicc 15782 fsumdvdsmul 16186 lgsquadlem1 16294 lgsquadlem2 16295 wlk1walkdom 16698 isclwwlk 16733 isclwwlknx 16755 clwwlknonel 16771 clwwlknon2x 16774 iseupthf1o 16787 alsanmo 17249 ralsanmo 17250 2alsraln0m 17256 |
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