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Theorem dchrisum0fval 27414
Description: Value of the function 𝐹, the divisor sum of a Dirichlet character. (Contributed by Mario Carneiro, 5-May-2016.)
Hypotheses
Ref Expression
rpvmasum.z 𝑍 = (ℤ/nℤ‘𝑁)
rpvmasum.l 𝐿 = (ℤRHom‘𝑍)
rpvmasum.a (𝜑𝑁 ∈ ℕ)
rpvmasum2.g 𝐺 = (DChr‘𝑁)
rpvmasum2.d 𝐷 = (Base‘𝐺)
rpvmasum2.1 1 = (0g𝐺)
dchrisum0f.f 𝐹 = (𝑏 ∈ ℕ ↦ Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞𝑏} (𝑋‘(𝐿𝑣)))
Assertion
Ref Expression
dchrisum0fval (𝐴 ∈ ℕ → (𝐹𝐴) = Σ𝑡 ∈ {𝑞 ∈ ℕ ∣ 𝑞𝐴} (𝑋‘(𝐿𝑡)))
Distinct variable groups:   𝑡, 1   𝑡,𝐹   𝑞,𝑏,𝑡,𝑣,𝐴   𝑁,𝑞,𝑡   𝜑,𝑡   𝑡,𝐷   𝐿,𝑏,𝑡,𝑣   𝑋,𝑏,𝑡,𝑣
Allowed substitution hints:   𝜑(𝑣,𝑞,𝑏)   𝐷(𝑣,𝑞,𝑏)   1 (𝑣,𝑞,𝑏)   𝐹(𝑣,𝑞,𝑏)   𝐺(𝑣,𝑡,𝑞,𝑏)   𝐿(𝑞)   𝑁(𝑣,𝑏)   𝑋(𝑞)   𝑍(𝑣,𝑡,𝑞,𝑏)

Proof of Theorem dchrisum0fval
StepHypRef Expression
1 breq2 5096 . . . . 5 (𝑏 = 𝐴 → (𝑞𝑏𝑞𝐴))
21rabbidv 3402 . . . 4 (𝑏 = 𝐴 → {𝑞 ∈ ℕ ∣ 𝑞𝑏} = {𝑞 ∈ ℕ ∣ 𝑞𝐴})
32sumeq1d 15607 . . 3 (𝑏 = 𝐴 → Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞𝑏} (𝑋‘(𝐿𝑣)) = Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞𝐴} (𝑋‘(𝐿𝑣)))
4 2fveq3 6827 . . . 4 (𝑣 = 𝑡 → (𝑋‘(𝐿𝑣)) = (𝑋‘(𝐿𝑡)))
54cbvsumv 15603 . . 3 Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞𝐴} (𝑋‘(𝐿𝑣)) = Σ𝑡 ∈ {𝑞 ∈ ℕ ∣ 𝑞𝐴} (𝑋‘(𝐿𝑡))
63, 5eqtrdi 2780 . 2 (𝑏 = 𝐴 → Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞𝑏} (𝑋‘(𝐿𝑣)) = Σ𝑡 ∈ {𝑞 ∈ ℕ ∣ 𝑞𝐴} (𝑋‘(𝐿𝑡)))
7 dchrisum0f.f . 2 𝐹 = (𝑏 ∈ ℕ ↦ Σ𝑣 ∈ {𝑞 ∈ ℕ ∣ 𝑞𝑏} (𝑋‘(𝐿𝑣)))
8 sumex 15595 . 2 Σ𝑡 ∈ {𝑞 ∈ ℕ ∣ 𝑞𝐴} (𝑋‘(𝐿𝑡)) ∈ V
96, 7, 8fvmpt 6930 1 (𝐴 ∈ ℕ → (𝐹𝐴) = Σ𝑡 ∈ {𝑞 ∈ ℕ ∣ 𝑞𝐴} (𝑋‘(𝐿𝑡)))
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1540  wcel 2109  {crab 3394   class class class wbr 5092  cmpt 5173  cfv 6482  cn 12128  Σcsu 15593  cdvds 16163  Basecbs 17120  0gc0g 17343  ℤRHomczrh 21406  ℤ/nczn 21409  DChrcdchr 27141
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 5235  ax-nul 5245  ax-pr 5371
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 3395  df-v 3438  df-sbc 3743  df-csb 3852  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-nul 4285  df-if 4477  df-sn 4578  df-pr 4580  df-op 4584  df-uni 4859  df-br 5093  df-opab 5155  df-mpt 5174  df-id 5514  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-dm 5629  df-rn 5630  df-res 5631  df-ima 5632  df-pred 6249  df-iota 6438  df-fun 6484  df-f 6486  df-f1 6487  df-fo 6488  df-f1o 6489  df-fv 6490  df-ov 7352  df-oprab 7353  df-mpo 7354  df-frecs 8214  df-wrecs 8245  df-recs 8294  df-rdg 8332  df-seq 13909  df-sum 15594
This theorem is referenced by:  dchrisum0fmul  27415  dchrisum0flblem1  27417  dchrisum0  27429
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