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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 5106 | . . . . 5 ⊢ (𝑏 = 𝐴 → (𝑞 ∥ 𝑏 ↔ 𝑞 ∥ 𝐴)) | |
| 2 | 1 | rabbidv 3410 | . . . 4 ⊢ (𝑏 = 𝐴 → {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝑏} = {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴}) |
| 3 | 2 | sumeq1d 15642 | . . 3 ⊢ (𝑏 = 𝐴 → Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝑏} (𝑋‘(𝐿‘𝑣)) = Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴} (𝑋‘(𝐿‘𝑣))) |
| 4 | 2fveq3 6845 | . . . 4 ⊢ (𝑣 = 𝑡 → (𝑋‘(𝐿‘𝑣)) = (𝑋‘(𝐿‘𝑡))) | |
| 5 | 4 | cbvsumv 15638 | . . 3 ⊢ Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴} (𝑋‘(𝐿‘𝑣)) = Σ𝑡 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴} (𝑋‘(𝐿‘𝑡)) |
| 6 | 3, 5 | eqtrdi 2780 | . 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 15630 | . 2 ⊢ Σ𝑡 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴} (𝑋‘(𝐿‘𝑡)) ∈ V | |
| 9 | 6, 7, 8 | fvmpt 6950 | 1 ⊢ (𝐴 ∈ ℕ → (𝐹‘𝐴) = Σ𝑡 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴} (𝑋‘(𝐿‘𝑡))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2109 {crab 3402 class class class wbr 5102 ↦ cmpt 5183 ‘cfv 6499 ℕcn 12162 Σcsu 15628 ∥ cdvds 16198 Basecbs 17155 0gc0g 17378 ℤRHomczrh 21441 ℤ/nℤczn 21444 DChrcdchr 27176 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5246 ax-nul 5256 ax-pr 5382 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-ral 3045 df-rex 3054 df-rab 3403 df-v 3446 df-sbc 3751 df-csb 3860 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-nul 4293 df-if 4485 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-br 5103 df-opab 5165 df-mpt 5184 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6262 df-iota 6452 df-fun 6501 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-ov 7372 df-oprab 7373 df-mpo 7374 df-frecs 8237 df-wrecs 8268 df-recs 8317 df-rdg 8355 df-seq 13943 df-sum 15629 |
| This theorem is referenced by: dchrisum0fmul 27450 dchrisum0flblem1 27452 dchrisum0 27464 |
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