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Mirrors > Home > MPE Home > Th. List > mule1 | Structured version Visualization version GIF version |
Description: The Möbius function takes on values in magnitude at most 1. (Together with mucl 26054, this implies that it takes a value in {-1, 0, 1} for every positive integer.) (Contributed by Mario Carneiro, 22-Sep-2014.) |
Ref | Expression |
---|---|
mule1 | ⊢ (𝐴 ∈ ℕ → (abs‘(μ‘𝐴)) ≤ 1) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | muval 26045 | . . . . 5 ⊢ (𝐴 ∈ ℕ → (μ‘𝐴) = if(∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴, 0, (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})))) | |
2 | iftrue 4461 | . . . . 5 ⊢ (∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴 → if(∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴, 0, (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}))) = 0) | |
3 | 1, 2 | sylan9eq 2800 | . . . 4 ⊢ ((𝐴 ∈ ℕ ∧ ∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴) → (μ‘𝐴) = 0) |
4 | 3 | fveq2d 6742 | . . 3 ⊢ ((𝐴 ∈ ℕ ∧ ∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴) → (abs‘(μ‘𝐴)) = (abs‘0)) |
5 | abs0 14881 | . . . 4 ⊢ (abs‘0) = 0 | |
6 | 0le1 11384 | . . . 4 ⊢ 0 ≤ 1 | |
7 | 5, 6 | eqbrtri 5090 | . . 3 ⊢ (abs‘0) ≤ 1 |
8 | 4, 7 | eqbrtrdi 5108 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ ∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴) → (abs‘(μ‘𝐴)) ≤ 1) |
9 | iffalse 4464 | . . . . . 6 ⊢ (¬ ∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴 → if(∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴, 0, (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}))) = (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}))) | |
10 | 1, 9 | sylan9eq 2800 | . . . . 5 ⊢ ((𝐴 ∈ ℕ ∧ ¬ ∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴) → (μ‘𝐴) = (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}))) |
11 | 10 | fveq2d 6742 | . . . 4 ⊢ ((𝐴 ∈ ℕ ∧ ¬ ∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴) → (abs‘(μ‘𝐴)) = (abs‘(-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})))) |
12 | neg1cn 11973 | . . . . . . 7 ⊢ -1 ∈ ℂ | |
13 | prmdvdsfi 26020 | . . . . . . . 8 ⊢ (𝐴 ∈ ℕ → {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∈ Fin) | |
14 | hashcl 13955 | . . . . . . . 8 ⊢ ({𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∈ Fin → (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}) ∈ ℕ0) | |
15 | 13, 14 | syl 17 | . . . . . . 7 ⊢ (𝐴 ∈ ℕ → (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}) ∈ ℕ0) |
16 | absexp 14900 | . . . . . . 7 ⊢ ((-1 ∈ ℂ ∧ (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}) ∈ ℕ0) → (abs‘(-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}))) = ((abs‘-1)↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}))) | |
17 | 12, 15, 16 | sylancr 590 | . . . . . 6 ⊢ (𝐴 ∈ ℕ → (abs‘(-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}))) = ((abs‘-1)↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}))) |
18 | ax-1cn 10816 | . . . . . . . . . 10 ⊢ 1 ∈ ℂ | |
19 | 18 | absnegi 14996 | . . . . . . . . 9 ⊢ (abs‘-1) = (abs‘1) |
20 | abs1 14893 | . . . . . . . . 9 ⊢ (abs‘1) = 1 | |
21 | 19, 20 | eqtri 2767 | . . . . . . . 8 ⊢ (abs‘-1) = 1 |
22 | 21 | oveq1i 7244 | . . . . . . 7 ⊢ ((abs‘-1)↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})) = (1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})) |
23 | 15 | nn0zd 12309 | . . . . . . . 8 ⊢ (𝐴 ∈ ℕ → (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}) ∈ ℤ) |
24 | 1exp 13696 | . . . . . . . 8 ⊢ ((♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}) ∈ ℤ → (1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})) = 1) | |
25 | 23, 24 | syl 17 | . . . . . . 7 ⊢ (𝐴 ∈ ℕ → (1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})) = 1) |
26 | 22, 25 | syl5eq 2792 | . . . . . 6 ⊢ (𝐴 ∈ ℕ → ((abs‘-1)↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})) = 1) |
27 | 17, 26 | eqtrd 2779 | . . . . 5 ⊢ (𝐴 ∈ ℕ → (abs‘(-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}))) = 1) |
28 | 27 | adantr 484 | . . . 4 ⊢ ((𝐴 ∈ ℕ ∧ ¬ ∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴) → (abs‘(-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}))) = 1) |
29 | 11, 28 | eqtrd 2779 | . . 3 ⊢ ((𝐴 ∈ ℕ ∧ ¬ ∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴) → (abs‘(μ‘𝐴)) = 1) |
30 | 1le1 11489 | . . 3 ⊢ 1 ≤ 1 | |
31 | 29, 30 | eqbrtrdi 5108 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ ¬ ∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴) → (abs‘(μ‘𝐴)) ≤ 1) |
32 | 8, 31 | pm2.61dan 813 | 1 ⊢ (𝐴 ∈ ℕ → (abs‘(μ‘𝐴)) ≤ 1) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 399 = wceq 1543 ∈ wcel 2112 ∃wrex 3065 {crab 3068 ifcif 4455 class class class wbr 5069 ‘cfv 6400 (class class class)co 7234 Fincfn 8649 ℂcc 10756 0cc0 10758 1c1 10759 ≤ cle 10897 -cneg 11092 ℕcn 11859 2c2 11914 ℕ0cn0 12119 ℤcz 12205 ↑cexp 13666 ♯chash 13928 abscabs 14829 ∥ cdvds 15847 ℙcprime 16260 μcmu 26008 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2710 ax-sep 5208 ax-nul 5215 ax-pow 5274 ax-pr 5338 ax-un 7544 ax-cnex 10814 ax-resscn 10815 ax-1cn 10816 ax-icn 10817 ax-addcl 10818 ax-addrcl 10819 ax-mulcl 10820 ax-mulrcl 10821 ax-mulcom 10822 ax-addass 10823 ax-mulass 10824 ax-distr 10825 ax-i2m1 10826 ax-1ne0 10827 ax-1rid 10828 ax-rnegex 10829 ax-rrecex 10830 ax-cnre 10831 ax-pre-lttri 10832 ax-pre-lttrn 10833 ax-pre-ltadd 10834 ax-pre-mulgt0 10835 ax-pre-sup 10836 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2818 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-reu 3071 df-rmo 3072 df-rab 3073 df-v 3425 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4456 df-pw 4531 df-sn 4558 df-pr 4560 df-tp 4562 df-op 4564 df-uni 4836 df-int 4876 df-iun 4922 df-br 5070 df-opab 5132 df-mpt 5152 df-tr 5178 df-id 5471 df-eprel 5477 df-po 5485 df-so 5486 df-fr 5526 df-we 5528 df-xp 5574 df-rel 5575 df-cnv 5576 df-co 5577 df-dm 5578 df-rn 5579 df-res 5580 df-ima 5581 df-pred 6178 df-ord 6236 df-on 6237 df-lim 6238 df-suc 6239 df-iota 6358 df-fun 6402 df-fn 6403 df-f 6404 df-f1 6405 df-fo 6406 df-f1o 6407 df-fv 6408 df-riota 7191 df-ov 7237 df-oprab 7238 df-mpo 7239 df-om 7666 df-1st 7782 df-2nd 7783 df-wrecs 8070 df-recs 8131 df-rdg 8169 df-1o 8225 df-er 8414 df-en 8650 df-dom 8651 df-sdom 8652 df-fin 8653 df-sup 9087 df-card 9584 df-pnf 10898 df-mnf 10899 df-xr 10900 df-ltxr 10901 df-le 10902 df-sub 11093 df-neg 11094 df-div 11519 df-nn 11860 df-2 11922 df-3 11923 df-n0 12120 df-z 12206 df-uz 12468 df-rp 12616 df-fz 13125 df-seq 13606 df-exp 13667 df-hash 13929 df-cj 14694 df-re 14695 df-im 14696 df-sqrt 14830 df-abs 14831 df-dvds 15848 df-prm 16261 df-mu 26014 |
This theorem is referenced by: dchrmusum2 26406 dchrvmasumlem3 26411 mudivsum 26442 mulogsumlem 26443 mulog2sumlem2 26447 selberglem2 26458 |
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