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| Mirrors > Home > MPE Home > Th. List > muf | Structured version Visualization version GIF version | ||
| Description: The Möbius function is a function into the integers. (Contributed by Mario Carneiro, 22-Sep-2014.) |
| Ref | Expression |
|---|---|
| muf | ⊢ μ:ℕ⟶ℤ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-mu 27474 | . 2 ⊢ μ = (𝑥 ∈ ℕ ↦ if(∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝑥, 0, ( -1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝑥})))) | |
| 2 | 0z 12742 | . . 3 ⊢ 0 ∈ ℤ | |
| 3 | neg1z 12770 | . . . 4 ⊢ -1 ∈ ℤ | |
| 4 | prmdvdsfi 27480 | . . . . 5 ⊢ (𝑥 ∈ ℕ → {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝑥} ∈ Fin) | |
| 5 | hashcl 14539 | . . . . 5 ⊢ ({𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝑥} ∈ Fin → (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝑥}) ∈ ℕ0) | |
| 6 | 4, 5 | syl 18 | . . . 4 ⊢ (𝑥 ∈ ℕ → (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝑥}) ∈ ℕ0) |
| 7 | zexpcl 14257 | . . . 4 ⊢ (( -1 ∈ ℤ ∧ (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝑥}) ∈ ℕ0) → ( -1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝑥})) ∈ ℤ) | |
| 8 | 3, 6, 7 | sylancr 599 | . . 3 ⊢ (𝑥 ∈ ℕ → ( -1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝑥})) ∈ ℤ) |
| 9 | ifcl 4531 | . . 3 ⊢ ((0 ∈ ℤ ∧ ( -1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝑥})) ∈ ℤ) → if(∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝑥, 0, ( -1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝑥}))) ∈ ℤ) | |
| 10 | 2, 8, 9 | sylancr 599 | . 2 ⊢ (𝑥 ∈ ℕ → if(∃𝑝 ∈ ℙ (𝑝↑2) ∥ 𝑥, 0, ( -1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝑥}))) ∈ ℤ) |
| 11 | 1, 10 | fmpti 7142 | 1 ⊢ μ:ℕ⟶ℤ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2147 ∃wrex 3090 {crab 3416 ifcif 4485 class class class wbr 5106 ⟶wf 6560 ‘cfv 6564 (class class class)co 7449 Fincfn 9009 0cc0 11237 1c1 11238 -cneg 11579 ℕcn 12373 2c2 12435 ℕ0cn0 12644 ℤcz 12731 ↑cexp 14242 ♯chash 14513 ∥ cdvds 16463 ℙcprime 16887 μcmu 27468 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5253 ax-nul 5264 ax-pow 5332 ax-pr 5396 ax-un 7781 ax-cnex 11293 ax-resscn 11294 ax-1cn 11295 ax-icn 11296 ax-addcl 11297 ax-addrcl 11298 ax-mulcl 11299 ax-mulrcl 11300 ax-mulcom 11301 ax-addass 11302 ax-mulass 11303 ax-distr 11304 ax-i2m1 11305 ax-1ne0 11306 ax-1rid 11307 ax-rnegex 11308 ax-rrecex 11309 ax-cnre 11310 ax-pre-lttri 11311 ax-pre-lttrn 11312 ax-pre-ltadd 11313 ax-pre-mulgt0 11314 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-int 4911 df-iun 4956 df-br 5107 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5551 df-eprel 5556 df-po 5564 df-so 5565 df-fr 5609 df-we 5611 df-xp 5662 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-rn 5667 df-res 5668 df-ima 5669 df-pred 6328 df-ord 6389 df-on 6390 df-lim 6391 df-suc 6392 df-iota 6518 df-fun 6566 df-fn 6567 df-f 6568 df-f1 6569 df-fo 6570 df-f1o 6571 df-fv 6572 df-riota 7406 df-ov 7452 df-oprab 7453 df-mpo 7454 df-om 7910 df-1st 8033 df-2nd 8034 df-frecs 8335 df-wrecs 8366 df-recs 8415 df-rdg 8454 df-1o 8512 df-er 8753 df-en 9010 df-dom 9011 df-sdom 9012 df-fin 9013 df-card 10055 df-pnf 11382 df-mnf 11383 df-xr 11384 df-ltxr 11385 df-le 11386 df-sub 11580 df-neg 11581 df-nn 12374 df-n0 12645 df-z 12732 df-uz 13004 df-fz 13678 df-seq 14183 df-exp 14243 df-hash 14514 df-dvds 16464 df-prm 16888 df-mu 27474 |
| This theorem is used by: mucl 27514 |
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