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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 4306 bnd2 4312 eqvinop 4385 copsexg 4386 uniuni 4599 rabxp 4814 elvvv 4840 rexiunxp 4924 resopab2 5113 ssrnres 5233 elxp4 5278 elxp5 5279 cnvresima 5280 mptpreima 5284 coass 5309 dff1o2 5647 eqfnfv3 5811 isoini 6027 f1oiso 6035 oprabid 6120 dfoprab2 6138 mpoeq123 6150 mpomptx 6182 resoprab2 6188 ovi3 6229 oprabex3 6366 spc2ed 6473 f1od2 6475 rexsupp 6497 brtpos2 6526 mapsnend 7103 mapsnen 7104 xpsnen 7123 xpcomco 7128 xpassen 7132 ltexpi 7710 enq0enq 7804 enq0tr 7807 prnmaxl 7861 prnminu 7862 genpdflem 7880 ltexprlemm 7973 suplocsrlemb 8179 axaddf 8241 axmulf 8242 rexuz 9996 rexuz2 9997 rexrp 10094 elixx3g 10320 elfz2 10435 fzdifsuc 10505 fzind2 10675 sseqn 11301 hashfibclem 11304 divalgb 12717 gcdass 12817 nnwosdc 12841 lcmass 12888 isprm2 12920 infpn2 13405 fngzsum 13767 gzsumvalx 13768 issubg3 14054 resscntz 14166 dfrhm2 14570 ntreq0 15358 tx1cn 15495 tx2cn 15496 blres 15660 metrest 15732 elcncf1di 15805 dedekindicclemicc 15858 fsumdvdsmul 16285 lgsquadlem1 16401 lgsquadlem2 16402 wlk1walkdom 16805 isclwwlk 16840 isclwwlknx 16862 clwwlknonel 16878 clwwlknon2x 16881 iseupthf1o 16894 idjudju 17252 alsanmo 17358 ralsanmo 17359 2alsraln0m 17365 |
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