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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 561 an32 562 an13 563 an31 564 an4 586 3anass 1006 sbidm 1897 4exdistr 1963 2sb5 2034 2sb5rf 2040 sbel2x 2049 r2exf 2548 r19.41 2686 ceqsex3v 2843 ceqsrex2v 2935 rexrab 2966 rexrab2 2970 rexss 3291 inass 3414 difin2 3466 difrab 3478 reupick3 3489 inssdif0im 3559 rexdifpr 3694 rexdifsn 3800 unidif0 4251 bnd2 4257 eqvinop 4329 copsexg 4330 uniuni 4542 rabxp 4756 elvvv 4782 rexiunxp 4864 resopab2 5052 ssrnres 5171 elxp4 5216 elxp5 5217 cnvresima 5218 mptpreima 5222 coass 5247 dff1o2 5579 eqfnfv3 5736 rexsupp 5761 isoini 5948 f1oiso 5956 oprabid 6039 dfoprab2 6057 mpoeq123 6069 mpomptx 6101 resoprab2 6107 ovi3 6148 oprabex3 6280 spc2ed 6385 f1od2 6387 brtpos2 6403 mapsnen 6972 xpsnen 6988 xpcomco 6993 xpassen 6997 ltexpi 7535 enq0enq 7629 enq0tr 7632 prnmaxl 7686 prnminu 7687 genpdflem 7705 ltexprlemm 7798 suplocsrlemb 8004 axaddf 8066 axmulf 8067 rexuz 9787 rexuz2 9788 rexrp 9884 elixx3g 10109 elfz2 10223 fzdifsuc 10289 fzind2 10457 divalgb 12452 gcdass 12552 nnwosdc 12576 lcmass 12623 isprm2 12655 infpn2 13043 fngsum 13437 igsumvalx 13438 issubg3 13745 dfrhm2 14134 ntreq0 14822 tx1cn 14959 tx2cn 14960 blres 15124 metrest 15196 elcncf1di 15269 dedekindicclemicc 15322 fsumdvdsmul 15681 lgsquadlem1 15772 lgsquadlem2 15773 wlk1walkdom 16105 isclwwlk 16137 isclwwlknx 16158 |
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