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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 26290, 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 26281 | . . . . 5 ⊢ (𝐴 ∈ ℕ → (μ‘𝐴) = if(∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴, 0, (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})))) | |
2 | iftrue 4465 | . . . . 5 ⊢ (∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴 → if(∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴, 0, (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}))) = 0) | |
3 | 1, 2 | sylan9eq 2798 | . . . 4 ⊢ ((𝐴 ∈ ℕ ∧ ∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴) → (μ‘𝐴) = 0) |
4 | 3 | fveq2d 6778 | . . 3 ⊢ ((𝐴 ∈ ℕ ∧ ∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴) → (abs‘(μ‘𝐴)) = (abs‘0)) |
5 | abs0 14997 | . . . 4 ⊢ (abs‘0) = 0 | |
6 | 0le1 11498 | . . . 4 ⊢ 0 ≤ 1 | |
7 | 5, 6 | eqbrtri 5095 | . . 3 ⊢ (abs‘0) ≤ 1 |
8 | 4, 7 | eqbrtrdi 5113 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ ∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴) → (abs‘(μ‘𝐴)) ≤ 1) |
9 | iffalse 4468 | . . . . . 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 2798 | . . . . 5 ⊢ ((𝐴 ∈ ℕ ∧ ¬ ∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴) → (μ‘𝐴) = (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}))) |
11 | 10 | fveq2d 6778 | . . . 4 ⊢ ((𝐴 ∈ ℕ ∧ ¬ ∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴) → (abs‘(μ‘𝐴)) = (abs‘(-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})))) |
12 | neg1cn 12087 | . . . . . . 7 ⊢ -1 ∈ ℂ | |
13 | prmdvdsfi 26256 | . . . . . . . 8 ⊢ (𝐴 ∈ ℕ → {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∈ Fin) | |
14 | hashcl 14071 | . . . . . . . 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 15016 | . . . . . . 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 587 | . . . . . 6 ⊢ (𝐴 ∈ ℕ → (abs‘(-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}))) = ((abs‘-1)↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}))) |
18 | ax-1cn 10929 | . . . . . . . . . 10 ⊢ 1 ∈ ℂ | |
19 | 18 | absnegi 15112 | . . . . . . . . 9 ⊢ (abs‘-1) = (abs‘1) |
20 | abs1 15009 | . . . . . . . . 9 ⊢ (abs‘1) = 1 | |
21 | 19, 20 | eqtri 2766 | . . . . . . . 8 ⊢ (abs‘-1) = 1 |
22 | 21 | oveq1i 7285 | . . . . . . 7 ⊢ ((abs‘-1)↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})) = (1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})) |
23 | 15 | nn0zd 12424 | . . . . . . . 8 ⊢ (𝐴 ∈ ℕ → (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}) ∈ ℤ) |
24 | 1exp 13812 | . . . . . . . 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 | eqtrid 2790 | . . . . . 6 ⊢ (𝐴 ∈ ℕ → ((abs‘-1)↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})) = 1) |
27 | 17, 26 | eqtrd 2778 | . . . . 5 ⊢ (𝐴 ∈ ℕ → (abs‘(-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}))) = 1) |
28 | 27 | adantr 481 | . . . 4 ⊢ ((𝐴 ∈ ℕ ∧ ¬ ∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴) → (abs‘(-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}))) = 1) |
29 | 11, 28 | eqtrd 2778 | . . 3 ⊢ ((𝐴 ∈ ℕ ∧ ¬ ∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴) → (abs‘(μ‘𝐴)) = 1) |
30 | 1le1 11603 | . . 3 ⊢ 1 ≤ 1 | |
31 | 29, 30 | eqbrtrdi 5113 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ ¬ ∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝐴) → (abs‘(μ‘𝐴)) ≤ 1) |
32 | 8, 31 | pm2.61dan 810 | 1 ⊢ (𝐴 ∈ ℕ → (abs‘(μ‘𝐴)) ≤ 1) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 396 = wceq 1539 ∈ wcel 2106 ∃wrex 3065 {crab 3068 ifcif 4459 class class class wbr 5074 ‘cfv 6433 (class class class)co 7275 Fincfn 8733 ℂcc 10869 0cc0 10871 1c1 10872 ≤ cle 11010 -cneg 11206 ℕcn 11973 2c2 12028 ℕ0cn0 12233 ℤcz 12319 ↑cexp 13782 ♯chash 14044 abscabs 14945 ∥ cdvds 15963 ℙcprime 16376 μcmu 26244 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-sup 9201 df-card 9697 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-n0 12234 df-z 12320 df-uz 12583 df-rp 12731 df-fz 13240 df-seq 13722 df-exp 13783 df-hash 14045 df-cj 14810 df-re 14811 df-im 14812 df-sqrt 14946 df-abs 14947 df-dvds 15964 df-prm 16377 df-mu 26250 |
This theorem is referenced by: dchrmusum2 26642 dchrvmasumlem3 26647 mudivsum 26678 mulogsumlem 26679 mulog2sumlem2 26683 selberglem2 26694 |
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