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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 5129 | . . . . 5 ⊢ (𝑏 = 𝐴 → (𝑞 ∥ 𝑏 ↔ 𝑞 ∥ 𝐴)) | |
| 2 | 1 | rabbidv 3428 | . . . 4 ⊢ (𝑏 = 𝐴 → {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝑏} = {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴}) |
| 3 | 2 | sumeq1d 15719 | . . 3 ⊢ (𝑏 = 𝐴 → Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝑏} (𝑋‘(𝐿‘𝑣)) = Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴} (𝑋‘(𝐿‘𝑣))) |
| 4 | 2fveq3 6892 | . . . 4 ⊢ (𝑣 = 𝑡 → (𝑋‘(𝐿‘𝑣)) = (𝑋‘(𝐿‘𝑡))) | |
| 5 | 4 | cbvsumv 15715 | . . 3 ⊢ Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴} (𝑋‘(𝐿‘𝑣)) = Σ𝑡 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴} (𝑋‘(𝐿‘𝑡)) |
| 6 | 3, 5 | eqtrdi 2785 | . 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 15707 | . 2 ⊢ Σ𝑡 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴} (𝑋‘(𝐿‘𝑡)) ∈ V | |
| 9 | 6, 7, 8 | fvmpt 6997 | 1 ⊢ (𝐴 ∈ ℕ → (𝐹‘𝐴) = Σ𝑡 ∈ {𝑞 ∈ ℕ ∣ 𝑞 ∥ 𝐴} (𝑋‘(𝐿‘𝑡))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1539 ∈ wcel 2107 {crab 3420 class class class wbr 5125 ↦ cmpt 5207 ‘cfv 6542 ℕcn 12249 Σcsu 15705 ∥ cdvds 16273 Basecbs 17230 0gc0g 17460 ℤRHomczrh 21477 ℤ/nℤczn 21480 DChrcdchr 27231 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1794 ax-4 1808 ax-5 1909 ax-6 1966 ax-7 2006 ax-8 2109 ax-9 2117 ax-10 2140 ax-11 2156 ax-12 2176 ax-ext 2706 ax-sep 5278 ax-nul 5288 ax-pr 5414 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1779 df-nf 1783 df-sb 2064 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2808 df-nfc 2884 df-ne 2932 df-ral 3051 df-rex 3060 df-rab 3421 df-v 3466 df-sbc 3773 df-csb 3882 df-dif 3936 df-un 3938 df-in 3940 df-ss 3950 df-nul 4316 df-if 4508 df-sn 4609 df-pr 4611 df-op 4615 df-uni 4890 df-br 5126 df-opab 5188 df-mpt 5208 df-id 5560 df-xp 5673 df-rel 5674 df-cnv 5675 df-co 5676 df-dm 5677 df-rn 5678 df-res 5679 df-ima 5680 df-pred 6303 df-iota 6495 df-fun 6544 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-ov 7417 df-oprab 7418 df-mpo 7419 df-frecs 8289 df-wrecs 8320 df-recs 8394 df-rdg 8433 df-seq 14026 df-sum 15706 |
| This theorem is referenced by: dchrisum0fmul 27505 dchrisum0flblem1 27507 dchrisum0 27519 |
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