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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 398 | . 2 ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) → (𝜑 ∧ (𝜓 ∧ 𝜒))) |
3 | id 19 | . . 3 ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) → ((𝜑 ∧ 𝜓) ∧ 𝜒)) | |
4 | 3 | anasss 397 | . 2 ⊢ ((𝜑 ∧ (𝜓 ∧ 𝜒)) → ((𝜑 ∧ 𝜓) ∧ 𝜒)) |
5 | 2, 4 | impbii 125 | 1 ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) ↔ (𝜑 ∧ (𝜓 ∧ 𝜒))) |
Colors of variables: wff set class |
Syntax hints: ∧ wa 103 ↔ wb 104 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 |
This theorem depends on definitions: df-bi 116 |
This theorem is referenced by: mpan10 466 an12 551 an32 552 an13 553 an31 554 an4 576 3anass 967 sbidm 1824 4exdistr 1889 2sb5 1959 2sb5rf 1965 sbel2x 1974 r2exf 2456 r19.41 2589 ceqsex3v 2731 ceqsrex2v 2821 rexrab 2851 rexrab2 2855 rexss 3169 inass 3291 difin2 3343 difrab 3355 reupick3 3366 inssdif0im 3435 rexdifpr 3560 rexdifsn 3663 unidif0 4099 bnd2 4105 eqvinop 4173 copsexg 4174 uniuni 4380 rabxp 4584 elvvv 4610 rexiunxp 4689 resopab2 4874 ssrnres 4989 elxp4 5034 elxp5 5035 cnvresima 5036 mptpreima 5040 coass 5065 dff1o2 5380 eqfnfv3 5528 rexsupp 5552 isoini 5727 f1oiso 5735 oprabid 5811 dfoprab2 5826 mpoeq123 5838 mpomptx 5870 resoprab2 5876 ovi3 5915 oprabex3 6035 spc2ed 6138 f1od2 6140 brtpos2 6156 mapsnen 6713 xpsnen 6723 xpcomco 6728 xpassen 6732 ltexpi 7169 enq0enq 7263 enq0tr 7266 prnmaxl 7320 prnminu 7321 genpdflem 7339 ltexprlemm 7432 suplocsrlemb 7638 axaddf 7700 axmulf 7701 rexuz 9402 rexuz2 9403 rexrp 9493 elixx3g 9714 elfz2 9828 fzdifsuc 9892 fzind2 10047 divalgb 11658 gcdass 11739 lcmass 11802 isprm2 11834 ntreq0 12340 tx1cn 12477 tx2cn 12478 blres 12642 metrest 12714 elcncf1di 12774 dedekindicclemicc 12818 |
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