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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 9980 rexuz2 9981 rexrp 10077 elixx3g 10303 elfz2 10418 fzdifsuc 10488 fzind2 10658 sseqn 11279 hashfibclem 11282 divalgb 12692 gcdass 12792 nnwosdc 12816 lcmass 12863 isprm2 12895 infpn2 13347 fngzsum 13708 gzsumvalx 13709 issubg3 13995 dfrhm2 14461 ntreq0 15233 tx1cn 15370 tx2cn 15371 blres 15535 metrest 15607 elcncf1di 15680 dedekindicclemicc 15733 fsumdvdsmul 16105 lgsquadlem1 16196 lgsquadlem2 16197 wlk1walkdom 16600 isclwwlk 16635 isclwwlknx 16657 clwwlknonel 16673 clwwlknon2x 16676 iseupthf1o 16689 alsanmo 17151 ralsanmo 17152 2alsraln0m 17158 |
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