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| Mirrors > Home > MPE Home > Th. List > sgmval | Structured version Visualization version GIF version | ||
| Description: The value of the divisor function. (Contributed by Mario Carneiro, 22-Sep-2014.) (Revised by Mario Carneiro, 21-Jun-2015.) |
| Ref | Expression |
|---|---|
| sgmval | ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℕ) → (𝐴 σ 𝐵) = Σ𝑘 ∈ {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝐵} (𝑘↑𝑐𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simpr 490 | . . . . 5 ⊢ ((𝑥 = 𝐴 ∧ 𝑛 = 𝐵) → 𝑛 = 𝐵) | |
| 2 | 1 | breq2d 5115 | . . . 4 ⊢ ((𝑥 = 𝐴 ∧ 𝑛 = 𝐵) → (𝑝 ∥ 𝑛 ↔ 𝑝 ∥ 𝐵)) |
| 3 | 2 | rabbidv 3419 | . . 3 ⊢ ((𝑥 = 𝐴 ∧ 𝑛 = 𝐵) → {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝑛} = {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝐵}) |
| 4 | simpll 779 | . . . 4 ⊢ (((𝑥 = 𝐴 ∧ 𝑛 = 𝐵) ∧ 𝑘 ∈ {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝑛}) → 𝑥 = 𝐴) | |
| 5 | 4 | oveq2d 7430 | . . 3 ⊢ (((𝑥 = 𝐴 ∧ 𝑛 = 𝐵) ∧ 𝑘 ∈ {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝑛}) → (𝑘↑𝑐𝑥) = (𝑘↑𝑐𝐴)) |
| 6 | 3, 5 | sumeq12dv 15793 | . 2 ⊢ ((𝑥 = 𝐴 ∧ 𝑛 = 𝐵) → Σ𝑘 ∈ {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝑛} (𝑘↑𝑐𝑥) = Σ𝑘 ∈ {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝐵} (𝑘↑𝑐𝐴)) |
| 7 | df-sgm 27339 | . 2 ⊢ σ = (𝑥 ∈ ℂ, 𝑛 ∈ ℕ ↦ Σ𝑘 ∈ {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝑛} (𝑘↑𝑐𝑥)) | |
| 8 | sumex 15776 | . 2 ⊢ Σ𝑘 ∈ {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝐵} (𝑘↑𝑐𝐴) ∈ V | |
| 9 | 6, 7, 8 | ovmpoa 7569 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℕ) → (𝐴 σ 𝐵) = Σ𝑘 ∈ {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝐵} (𝑘↑𝑐𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 {crab 3412 class class class wbr 5103 (class class class)co 7414 ℂcc 11123 ℕcn 12258 Σcsu 15774 ∥ cdvds 16343 ↑𝑐ccxp 26793 σ csgm 27333 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-cnex 11181 ax-resscn 11182 ax-1cn 11183 ax-icn 11184 ax-addcl 11185 ax-addrcl 11186 ax-mulcl 11187 ax-mulrcl 11188 ax-mulcom 11189 ax-addass 11190 ax-mulass 11191 ax-distr 11192 ax-i2m1 11193 ax-1ne0 11194 ax-1rid 11195 ax-rnegex 11196 ax-rrecex 11197 ax-cnre 11198 ax-pre-lttri 11199 ax-pre-lttrn 11200 ax-pre-ltadd 11201 ax-pre-mulgt0 11202 |
| 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 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7864 df-1st 7987 df-2nd 7988 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-er 8697 df-en 8954 df-dom 8955 df-sdom 8956 df-pnf 11270 df-mnf 11271 df-xr 11272 df-ltxr 11273 df-le 11274 df-sub 11468 df-neg 11469 df-nn 12259 df-n0 12530 df-z 12617 df-uz 12889 df-fz 13563 df-seq 14067 df-sum 15775 df-sgm 27339 |
| This theorem is used by: sgmval2 27380 sgmppw 27434 sgmmul 27438 perfectlem2 27467 perfectALTVlem2 48639 |
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