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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 400 | . 2 ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) → (𝜑 ∧ (𝜓 ∧ 𝜒))) |
| 3 | id 19 | . . 3 ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) → ((𝜑 ∧ 𝜓) ∧ 𝜒)) | |
| 4 | 3 | anasss 399 | . 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 469 mpan10 474 an12 563 an32 564 an13 565 an31 566 an4 588 3anass 1009 sbidm 1900 4exdistr 1968 2sb5 2039 2sb5rf 2045 sbel2x 2054 r2exf 2562 r19.41 2700 ceqsex3v 2859 ceqsrex2v 2952 rexrab 2983 rexrab2 2987 rexss 3309 inass 3435 difin2 3487 difrab 3499 reupick3 3510 inssdif0im 3580 rexdifpr 3722 rexdifsn 3830 unidif0 4285 bnd2 4291 eqvinop 4364 copsexg 4365 uniuni 4577 rabxp 4792 elvvv 4818 rexiunxp 4902 resopab2 5090 ssrnres 5210 elxp4 5255 elxp5 5256 cnvresima 5257 mptpreima 5261 coass 5286 dff1o2 5624 eqfnfv3 5782 isoini 5997 f1oiso 6005 oprabid 6090 dfoprab2 6108 mpoeq123 6120 mpomptx 6152 resoprab2 6158 ovi3 6199 oprabex3 6335 spc2ed 6442 f1od2 6444 rexsupp 6466 brtpos2 6495 mapsnend 7065 mapsnen 7066 xpsnen 7085 xpcomco 7090 xpassen 7094 ltexpi 7668 enq0enq 7762 enq0tr 7765 prnmaxl 7819 prnminu 7820 genpdflem 7838 ltexprlemm 7931 suplocsrlemb 8137 axaddf 8199 axmulf 8200 rexuz 9930 rexuz2 9931 rexrp 10027 elixx3g 10253 elfz2 10368 fzdifsuc 10437 fzind2 10607 sseqn 11228 hashfibclem 11231 divalgb 12636 gcdass 12736 nnwosdc 12760 lcmass 12807 isprm2 12839 infpn2 13291 fngsum 13651 igsumvalx 13652 issubg3 13945 dfrhm2 14399 ntreq0 15123 tx1cn 15260 tx2cn 15261 blres 15425 metrest 15497 elcncf1di 15570 dedekindicclemicc 15623 fsumdvdsmul 15985 lgsquadlem1 16076 lgsquadlem2 16077 wlk1walkdom 16480 isclwwlk 16515 isclwwlknx 16537 clwwlknonel 16553 clwwlknon2x 16556 iseupthf1o 16569 |
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