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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 1966 2sb5 2037 2sb5rf 2043 sbel2x 2052 r2exf 2560 r19.41 2698 ceqsex3v 2857 ceqsrex2v 2949 rexrab 2980 rexrab2 2984 rexss 3305 inass 3431 difin2 3483 difrab 3495 reupick3 3506 inssdif0im 3576 rexdifpr 3717 rexdifsn 3825 unidif0 4280 bnd2 4286 eqvinop 4359 copsexg 4360 uniuni 4572 rabxp 4787 elvvv 4813 rexiunxp 4897 resopab2 5085 ssrnres 5205 elxp4 5250 elxp5 5251 cnvresima 5252 mptpreima 5256 coass 5281 dff1o2 5619 eqfnfv3 5777 isoini 5991 f1oiso 5999 oprabid 6082 dfoprab2 6100 mpoeq123 6112 mpomptx 6144 resoprab2 6150 ovi3 6191 oprabex3 6322 spc2ed 6429 f1od2 6431 rexsupp 6453 brtpos2 6482 mapsnend 7052 mapsnen 7053 xpsnen 7072 xpcomco 7077 xpassen 7081 ltexpi 7652 enq0enq 7746 enq0tr 7749 prnmaxl 7803 prnminu 7804 genpdflem 7822 ltexprlemm 7915 suplocsrlemb 8121 axaddf 8183 axmulf 8184 rexuz 9912 rexuz2 9913 rexrp 10009 elixx3g 10234 elfz2 10349 fzdifsuc 10415 fzind2 10585 sseqn 11203 hashfibclem 11206 divalgb 12611 gcdass 12711 nnwosdc 12735 lcmass 12782 isprm2 12814 infpn2 13207 fngsum 13601 igsumvalx 13602 issubg3 13909 dfrhm2 14299 ntreq0 14997 tx1cn 15134 tx2cn 15135 blres 15299 metrest 15371 elcncf1di 15444 dedekindicclemicc 15497 fsumdvdsmul 15859 lgsquadlem1 15950 lgsquadlem2 15951 wlk1walkdom 16354 isclwwlk 16389 isclwwlknx 16411 clwwlknonel 16427 clwwlknon2x 16430 iseupthf1o 16443 |
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