Theorem ser1const 12857

Description: Value of the partial series sum of a constant function. (Contributed by NM, 8-Aug-2005.) (Revised by Mario Carneiro, 16-Feb-2014.)

Assertion

Ref	Expression
ser1const	⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ) → (seq1( + , (ℕ × {𝐴}))‘𝑁) = (𝑁 · 𝐴))

Proof of Theorem ser1const

Dummy variables 𝑗 𝑘 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		fveq2 6191	. . . . 5 ⊢ (𝑗 = 1 → (seq1( + , (ℕ × {𝐴}))‘𝑗) = (seq1( + , (ℕ × {𝐴}))‘1))
2		oveq1 6657	. . . . 5 ⊢ (𝑗 = 1 → (𝑗 · 𝐴) = (1 · 𝐴))
3	1, 2	eqeq12d 2637	. . . 4 ⊢ (𝑗 = 1 → ((seq1( + , (ℕ × {𝐴}))‘𝑗) = (𝑗 · 𝐴) ↔ (seq1( + , (ℕ × {𝐴}))‘1) = (1 · 𝐴)))
4	3	imbi2d 330	. . 3 ⊢ (𝑗 = 1 → ((𝐴 ∈ ℂ → (seq1( + , (ℕ × {𝐴}))‘𝑗) = (𝑗 · 𝐴)) ↔ (𝐴 ∈ ℂ → (seq1( + , (ℕ × {𝐴}))‘1) = (1 · 𝐴))))
5		fveq2 6191	. . . . 5 ⊢ (𝑗 = 𝑘 → (seq1( + , (ℕ × {𝐴}))‘𝑗) = (seq1( + , (ℕ × {𝐴}))‘𝑘))
6		oveq1 6657	. . . . 5 ⊢ (𝑗 = 𝑘 → (𝑗 · 𝐴) = (𝑘 · 𝐴))
7	5, 6	eqeq12d 2637	. . . 4 ⊢ (𝑗 = 𝑘 → ((seq1( + , (ℕ × {𝐴}))‘𝑗) = (𝑗 · 𝐴) ↔ (seq1( + , (ℕ × {𝐴}))‘𝑘) = (𝑘 · 𝐴)))
8	7	imbi2d 330	. . 3 ⊢ (𝑗 = 𝑘 → ((𝐴 ∈ ℂ → (seq1( + , (ℕ × {𝐴}))‘𝑗) = (𝑗 · 𝐴)) ↔ (𝐴 ∈ ℂ → (seq1( + , (ℕ × {𝐴}))‘𝑘) = (𝑘 · 𝐴))))
9		fveq2 6191	. . . . 5 ⊢ (𝑗 = (𝑘 + 1) → (seq1( + , (ℕ × {𝐴}))‘𝑗) = (seq1( + , (ℕ × {𝐴}))‘(𝑘 + 1)))
10		oveq1 6657	. . . . 5 ⊢ (𝑗 = (𝑘 + 1) → (𝑗 · 𝐴) = ((𝑘 + 1) · 𝐴))
11	9, 10	eqeq12d 2637	. . . 4 ⊢ (𝑗 = (𝑘 + 1) → ((seq1( + , (ℕ × {𝐴}))‘𝑗) = (𝑗 · 𝐴) ↔ (seq1( + , (ℕ × {𝐴}))‘(𝑘 + 1)) = ((𝑘 + 1) · 𝐴)))
12	11	imbi2d 330	. . 3 ⊢ (𝑗 = (𝑘 + 1) → ((𝐴 ∈ ℂ → (seq1( + , (ℕ × {𝐴}))‘𝑗) = (𝑗 · 𝐴)) ↔ (𝐴 ∈ ℂ → (seq1( + , (ℕ × {𝐴}))‘(𝑘 + 1)) = ((𝑘 + 1) · 𝐴))))
13		fveq2 6191	. . . . 5 ⊢ (𝑗 = 𝑁 → (seq1( + , (ℕ × {𝐴}))‘𝑗) = (seq1( + , (ℕ × {𝐴}))‘𝑁))
14		oveq1 6657	. . . . 5 ⊢ (𝑗 = 𝑁 → (𝑗 · 𝐴) = (𝑁 · 𝐴))
15	13, 14	eqeq12d 2637	. . . 4 ⊢ (𝑗 = 𝑁 → ((seq1( + , (ℕ × {𝐴}))‘𝑗) = (𝑗 · 𝐴) ↔ (seq1( + , (ℕ × {𝐴}))‘𝑁) = (𝑁 · 𝐴)))
16	15	imbi2d 330	. . 3 ⊢ (𝑗 = 𝑁 → ((𝐴 ∈ ℂ → (seq1( + , (ℕ × {𝐴}))‘𝑗) = (𝑗 · 𝐴)) ↔ (𝐴 ∈ ℂ → (seq1( + , (ℕ × {𝐴}))‘𝑁) = (𝑁 · 𝐴))))
17		1z 11407	. . . 4 ⊢ 1 ∈ ℤ
18		1nn 11031	. . . . . 6 ⊢ 1 ∈ ℕ
19		fvconst2g 6467	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℕ) → ((ℕ × {𝐴})‘1) = 𝐴)
20	18, 19	mpan2 707	. . . . 5 ⊢ (𝐴 ∈ ℂ → ((ℕ × {𝐴})‘1) = 𝐴)
21		mulid2 10038	. . . . 5 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴)
22	20, 21	eqtr4d 2659	. . . 4 ⊢ (𝐴 ∈ ℂ → ((ℕ × {𝐴})‘1) = (1 · 𝐴))
23	17, 22	seq1i 12815	. . 3 ⊢ (𝐴 ∈ ℂ → (seq1( + , (ℕ × {𝐴}))‘1) = (1 · 𝐴))
24		oveq1 6657	. . . . . 6 ⊢ ((seq1( + , (ℕ × {𝐴}))‘𝑘) = (𝑘 · 𝐴) → ((seq1( + , (ℕ × {𝐴}))‘𝑘) + 𝐴) = ((𝑘 · 𝐴) + 𝐴))
25		seqp1 12816	. . . . . . . . . 10 ⊢ (𝑘 ∈ (ℤ≥‘1) → (seq1( + , (ℕ × {𝐴}))‘(𝑘 + 1)) = ((seq1( + , (ℕ × {𝐴}))‘𝑘) + ((ℕ × {𝐴})‘(𝑘 + 1))))
26		nnuz 11723	. . . . . . . . . 10 ⊢ ℕ = (ℤ≥‘1)
27	25, 26	eleq2s 2719	. . . . . . . . 9 ⊢ (𝑘 ∈ ℕ → (seq1( + , (ℕ × {𝐴}))‘(𝑘 + 1)) = ((seq1( + , (ℕ × {𝐴}))‘𝑘) + ((ℕ × {𝐴})‘(𝑘 + 1))))
28	27	adantl 482	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝑘 ∈ ℕ) → (seq1( + , (ℕ × {𝐴}))‘(𝑘 + 1)) = ((seq1( + , (ℕ × {𝐴}))‘𝑘) + ((ℕ × {𝐴})‘(𝑘 + 1))))
29		peano2nn 11032	. . . . . . . . . 10 ⊢ (𝑘 ∈ ℕ → (𝑘 + 1) ∈ ℕ)
30		fvconst2g 6467	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ (𝑘 + 1) ∈ ℕ) → ((ℕ × {𝐴})‘(𝑘 + 1)) = 𝐴)
31	29, 30	sylan2 491	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝑘 ∈ ℕ) → ((ℕ × {𝐴})‘(𝑘 + 1)) = 𝐴)
32	31	oveq2d 6666	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝑘 ∈ ℕ) → ((seq1( + , (ℕ × {𝐴}))‘𝑘) + ((ℕ × {𝐴})‘(𝑘 + 1))) = ((seq1( + , (ℕ × {𝐴}))‘𝑘) + 𝐴))
33	28, 32	eqtrd 2656	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑘 ∈ ℕ) → (seq1( + , (ℕ × {𝐴}))‘(𝑘 + 1)) = ((seq1( + , (ℕ × {𝐴}))‘𝑘) + 𝐴))
34		nncn 11028	. . . . . . . . 9 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ ℂ)
35		id 22	. . . . . . . . 9 ⊢ (𝐴 ∈ ℂ → 𝐴 ∈ ℂ)
36		ax-1cn 9994	. . . . . . . . . 10 ⊢ 1 ∈ ℂ
37		adddir 10031	. . . . . . . . . 10 ⊢ ((𝑘 ∈ ℂ ∧ 1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((𝑘 + 1) · 𝐴) = ((𝑘 · 𝐴) + (1 · 𝐴)))
38	36, 37	mp3an2 1412	. . . . . . . . 9 ⊢ ((𝑘 ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((𝑘 + 1) · 𝐴) = ((𝑘 · 𝐴) + (1 · 𝐴)))
39	34, 35, 38	syl2anr 495	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝑘 ∈ ℕ) → ((𝑘 + 1) · 𝐴) = ((𝑘 · 𝐴) + (1 · 𝐴)))
40	21	adantr 481	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝑘 ∈ ℕ) → (1 · 𝐴) = 𝐴)
41	40	oveq2d 6666	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝑘 ∈ ℕ) → ((𝑘 · 𝐴) + (1 · 𝐴)) = ((𝑘 · 𝐴) + 𝐴))
42	39, 41	eqtrd 2656	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑘 ∈ ℕ) → ((𝑘 + 1) · 𝐴) = ((𝑘 · 𝐴) + 𝐴))
43	33, 42	eqeq12d 2637	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝑘 ∈ ℕ) → ((seq1( + , (ℕ × {𝐴}))‘(𝑘 + 1)) = ((𝑘 + 1) · 𝐴) ↔ ((seq1( + , (ℕ × {𝐴}))‘𝑘) + 𝐴) = ((𝑘 · 𝐴) + 𝐴)))
44	24, 43	syl5ibr 236	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝑘 ∈ ℕ) → ((seq1( + , (ℕ × {𝐴}))‘𝑘) = (𝑘 · 𝐴) → (seq1( + , (ℕ × {𝐴}))‘(𝑘 + 1)) = ((𝑘 + 1) · 𝐴)))
45	44	expcom 451	. . . 4 ⊢ (𝑘 ∈ ℕ → (𝐴 ∈ ℂ → ((seq1( + , (ℕ × {𝐴}))‘𝑘) = (𝑘 · 𝐴) → (seq1( + , (ℕ × {𝐴}))‘(𝑘 + 1)) = ((𝑘 + 1) · 𝐴))))
46	45	a2d 29	. . 3 ⊢ (𝑘 ∈ ℕ → ((𝐴 ∈ ℂ → (seq1( + , (ℕ × {𝐴}))‘𝑘) = (𝑘 · 𝐴)) → (𝐴 ∈ ℂ → (seq1( + , (ℕ × {𝐴}))‘(𝑘 + 1)) = ((𝑘 + 1) · 𝐴))))
47	4, 8, 12, 16, 23, 46	nnind 11038	. 2 ⊢ (𝑁 ∈ ℕ → (𝐴 ∈ ℂ → (seq1( + , (ℕ × {𝐴}))‘𝑁) = (𝑁 · 𝐴)))
48	47	impcom 446	1 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ) → (seq1( + , (ℕ × {𝐴}))‘𝑁) = (𝑁 · 𝐴))

Syntax hints:   → wi 4   ∧ wa 384   = wceq 1483   ∈ wcel 1990  {csn 4177   × cxp 5112  ‘cfv 5888  (class class class)co 6650  ℂcc 9934  1c1 9937   + caddc 9939   · cmul 9941  ℕcn 11020  ℤ_≥cuz 11687  seqcseq 12801

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-cnex 9992  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-mulcom 10000  ax-addass 10001  ax-mulass 10002  ax-distr 10003  ax-i2m1 10004  ax-1ne0 10005  ax-1rid 10006  ax-rnegex 10007  ax-rrecex 10008  ax-cnre 10009  ax-pre-lttri 10010  ax-pre-lttrn 10011  ax-pre-ltadd 10012  ax-pre-mulgt0 10013

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-reu 2919  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-om 7066  df-2nd 7169  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-er 7742  df-en 7956  df-dom 7957  df-sdom 7958  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-nn 11021  df-n0 11293  df-z 11378  df-uz 11688  df-seq 12802

This theorem is referenced by:  fsumconst  14522  vitalilem4  23380  ovoliunnfl  33451  voliunnfl  33453