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| Mirrors > Home > MPE Home > Th. List > dchrisum0fval | Structured version Visualization version GIF version | ||
| Description: Value of the function 𝐹, the divisor sum of a Dirichlet character. (Contributed by Mario Carneiro, 5-May-2016.) |
| Ref | Expression |
|---|---|
| rpvmasum.z | ⊢ 𝑍 = (ℤ/nℤ‘𝑁) |
| rpvmasum.l | ⊢ 𝐿 = (ℤRHom‘𝑍) |
| rpvmasum.a | ⊢ (𝜑 → 𝑁 ∈ ℕ) |
| rpvmasum2.g | ⊢ 𝐺 = (DChr‘𝑁) |
| rpvmasum2.d | ⊢ 𝐷 = (Base‘𝐺) |
| rpvmasum2.1 | ⊢ 1 = (0g‘𝐺) |
| dchrisum0f.f | ⊢ 𝐹 = (𝑏 ∈ ℕ ↦ Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝑏} (𝑋‘(𝐿‘𝑣))) |
| Ref | Expression |
|---|---|
| dchrisum0fval | ⊢ (𝐴 ∈ ℕ → (𝐹‘𝐴) = Σ𝑡 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴} (𝑋‘(𝐿‘𝑡))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | breq2 5115 | . . . . 5 ⊢ (𝑏 = 𝐴 → (𝑞 ∥ 𝑏 ↔ 𝑞 ∥ 𝐴)) | |
| 2 | 1 | rabbidv 3425 | . . . 4 ⊢ (𝑏 = 𝐴 → {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝑏} = {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴}) |
| 3 | 2 | sumeq1d 15779 | . . 3 ⊢ (𝑏 = 𝐴 → Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝑏} (𝑋‘(𝐿‘𝑣)) = Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴} (𝑋‘(𝐿‘𝑣))) |
| 4 | 2fveq3 6890 | . . . 4 ⊢ (𝑣 = 𝑡 → (𝑋‘(𝐿‘𝑣)) = (𝑋‘(𝐿‘𝑡))) | |
| 5 | 4 | cbvsumv 15775 | . . 3 ⊢ Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴} (𝑋‘(𝐿‘𝑣)) = Σ𝑡 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴} (𝑋‘(𝐿‘𝑡)) |
| 6 | 3, 5 | eqtrdi 2816 | . 2 ⊢ (𝑏 = 𝐴 → Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝑏} (𝑋‘(𝐿‘𝑣)) = Σ𝑡 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴} (𝑋‘(𝐿‘𝑡))) |
| 7 | dchrisum0f.f | . 2 ⊢ 𝐹 = (𝑏 ∈ ℕ ↦ Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝑏} (𝑋‘(𝐿‘𝑣))) | |
| 8 | sumex 15767 | . 2 ⊢ Σ𝑡 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴} (𝑋‘(𝐿‘𝑡)) ∈ V | |
| 9 | 6, 7, 8 | fvmpt 6993 | 1 ⊢ (𝐴 ∈ ℕ → (𝐹‘𝐴) = Σ𝑡 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴} (𝑋‘(𝐿‘𝑡))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2146 {crab 3418 class class class wbr 5111 ↦ cmpt 5194 ‘cfv 6540 ℕcn 12252 Σcsu 15765 ∥ cdvds 16336 Basecbs 17295 0gc0g 17518 ℤRHomczrh 21703 ℤ/nℤczn 21706 DChrcdchr 27451 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pr 5406 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-mpt 5195 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-iota 6496 df-fun 6542 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-ov 7422 df-oprab 7423 df-mpo 7424 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-seq 14060 df-sum 15766 |
| This theorem is used by: dchrisum0fmul 27725 dchrisum0flblem1 27727 dchrisum0 27739 |
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