Theorem fsummulc2 14358

Description: A finite sum multiplied by a constant. (Contributed by NM, 12-Nov-2005.) (Revised by Mario Carneiro, 24-Apr-2014.)

Hypotheses

Ref	Expression
fsummulc2.1	⊢ (𝜑 → 𝐴 ∈ Fin)
fsummulc2.2	⊢ (𝜑 → 𝐶 ∈ ℂ)
fsummulc2.3	⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ ℂ)

Assertion

Ref	Expression
fsummulc2	⊢ (𝜑 → (𝐶 · Σ𝑘 ∈ 𝐴 𝐵) = Σ𝑘 ∈ 𝐴 (𝐶 · 𝐵))

Distinct variable groups:   𝐴,𝑘   𝐶,𝑘   𝜑,𝑘

Allowed substitution hint:   𝐵(𝑘)

Proof of Theorem fsummulc2

Dummy variables 𝑓 𝑚 𝑛 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		fsummulc2.2	. . . 4 ⊢ (𝜑 → 𝐶 ∈ ℂ)
2	1	mul01d 10114	. . 3 ⊢ (𝜑 → (𝐶 · 0) = 0)
3		sumeq1 14267	. . . . . 6 ⊢ (𝐴 = ∅ → Σ𝑘 ∈ 𝐴 𝐵 = Σ𝑘 ∈ ∅ 𝐵)
4		sum0 14299	. . . . . 6 ⊢ Σ𝑘 ∈ ∅ 𝐵 = 0
5	3, 4	syl6eq 2660	. . . . 5 ⊢ (𝐴 = ∅ → Σ𝑘 ∈ 𝐴 𝐵 = 0)
6	5	oveq2d 6565	. . . 4 ⊢ (𝐴 = ∅ → (𝐶 · Σ𝑘 ∈ 𝐴 𝐵) = (𝐶 · 0))
7		sumeq1 14267	. . . . 5 ⊢ (𝐴 = ∅ → Σ𝑘 ∈ 𝐴 (𝐶 · 𝐵) = Σ𝑘 ∈ ∅ (𝐶 · 𝐵))
8		sum0 14299	. . . . 5 ⊢ Σ𝑘 ∈ ∅ (𝐶 · 𝐵) = 0
9	7, 8	syl6eq 2660	. . . 4 ⊢ (𝐴 = ∅ → Σ𝑘 ∈ 𝐴 (𝐶 · 𝐵) = 0)
10	6, 9	eqeq12d 2625	. . 3 ⊢ (𝐴 = ∅ → ((𝐶 · Σ𝑘 ∈ 𝐴 𝐵) = Σ𝑘 ∈ 𝐴 (𝐶 · 𝐵) ↔ (𝐶 · 0) = 0))
11	2, 10	syl5ibrcom 236	. 2 ⊢ (𝜑 → (𝐴 = ∅ → (𝐶 · Σ𝑘 ∈ 𝐴 𝐵) = Σ𝑘 ∈ 𝐴 (𝐶 · 𝐵)))
12		addcl 9897	. . . . . . . . 9 ⊢ ((𝑛 ∈ ℂ ∧ 𝑚 ∈ ℂ) → (𝑛 + 𝑚) ∈ ℂ)
13	12	adantl 481	. . . . . . . 8 ⊢ (((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) ∧ (𝑛 ∈ ℂ ∧ 𝑚 ∈ ℂ)) → (𝑛 + 𝑚) ∈ ℂ)
14	1	adantr 480	. . . . . . . . 9 ⊢ ((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) → 𝐶 ∈ ℂ)
15		adddi 9904	. . . . . . . . . 10 ⊢ ((𝐶 ∈ ℂ ∧ 𝑛 ∈ ℂ ∧ 𝑚 ∈ ℂ) → (𝐶 · (𝑛 + 𝑚)) = ((𝐶 · 𝑛) + (𝐶 · 𝑚)))
16	15	3expb 1258	. . . . . . . . 9 ⊢ ((𝐶 ∈ ℂ ∧ (𝑛 ∈ ℂ ∧ 𝑚 ∈ ℂ)) → (𝐶 · (𝑛 + 𝑚)) = ((𝐶 · 𝑛) + (𝐶 · 𝑚)))
17	14, 16	sylan 487	. . . . . . . 8 ⊢ (((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) ∧ (𝑛 ∈ ℂ ∧ 𝑚 ∈ ℂ)) → (𝐶 · (𝑛 + 𝑚)) = ((𝐶 · 𝑛) + (𝐶 · 𝑚)))
18		simprl 790	. . . . . . . . 9 ⊢ ((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) → (#‘𝐴) ∈ ℕ)
19		nnuz 11599	. . . . . . . . 9 ⊢ ℕ = (ℤ≥‘1)
20	18, 19	syl6eleq 2698	. . . . . . . 8 ⊢ ((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) → (#‘𝐴) ∈ (ℤ≥‘1))
21		fsummulc2.3	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ ℂ)
22		eqid 2610	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ 𝐴 ↦ 𝐵) = (𝑘 ∈ 𝐴 ↦ 𝐵)
23	21, 22	fmptd 6292	. . . . . . . . . . 11 ⊢ (𝜑 → (𝑘 ∈ 𝐴 ↦ 𝐵):𝐴⟶ℂ)
24	23	ad2antrr 758	. . . . . . . . . 10 ⊢ (((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) ∧ 𝑛 ∈ (1...(#‘𝐴))) → (𝑘 ∈ 𝐴 ↦ 𝐵):𝐴⟶ℂ)
25		simprr 792	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) → 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)
26	25	adantr 480	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) ∧ 𝑛 ∈ (1...(#‘𝐴))) → 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)
27		f1of 6050	. . . . . . . . . . 11 ⊢ (𝑓:(1...(#‘𝐴))–1-1-onto→𝐴 → 𝑓:(1...(#‘𝐴))⟶𝐴)
28	26, 27	syl 17	. . . . . . . . . 10 ⊢ (((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) ∧ 𝑛 ∈ (1...(#‘𝐴))) → 𝑓:(1...(#‘𝐴))⟶𝐴)
29		fco 5971	. . . . . . . . . 10 ⊢ (((𝑘 ∈ 𝐴 ↦ 𝐵):𝐴⟶ℂ ∧ 𝑓:(1...(#‘𝐴))⟶𝐴) → ((𝑘 ∈ 𝐴 ↦ 𝐵) ∘ 𝑓):(1...(#‘𝐴))⟶ℂ)
30	24, 28, 29	syl2anc 691	. . . . . . . . 9 ⊢ (((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) ∧ 𝑛 ∈ (1...(#‘𝐴))) → ((𝑘 ∈ 𝐴 ↦ 𝐵) ∘ 𝑓):(1...(#‘𝐴))⟶ℂ)
31		simpr 476	. . . . . . . . 9 ⊢ (((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) ∧ 𝑛 ∈ (1...(#‘𝐴))) → 𝑛 ∈ (1...(#‘𝐴)))
32	30, 31	ffvelrnd 6268	. . . . . . . 8 ⊢ (((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) ∧ 𝑛 ∈ (1...(#‘𝐴))) → (((𝑘 ∈ 𝐴 ↦ 𝐵) ∘ 𝑓)‘𝑛) ∈ ℂ)
33	28, 31	ffvelrnd 6268	. . . . . . . . . 10 ⊢ (((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) ∧ 𝑛 ∈ (1...(#‘𝐴))) → (𝑓‘𝑛) ∈ 𝐴)
34		simpr 476	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝑘 ∈ 𝐴)
35	1	adantr 480	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐶 ∈ ℂ)
36	35, 21	mulcld 9939	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → (𝐶 · 𝐵) ∈ ℂ)
37		eqid 2610	. . . . . . . . . . . . . . 15 ⊢ (𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵)) = (𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))
38	37	fvmpt2 6200	. . . . . . . . . . . . . 14 ⊢ ((𝑘 ∈ 𝐴 ∧ (𝐶 · 𝐵) ∈ ℂ) → ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘𝑘) = (𝐶 · 𝐵))
39	34, 36, 38	syl2anc 691	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘𝑘) = (𝐶 · 𝐵))
40	22	fvmpt2 6200	. . . . . . . . . . . . . . 15 ⊢ ((𝑘 ∈ 𝐴 ∧ 𝐵 ∈ ℂ) → ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘) = 𝐵)
41	34, 21, 40	syl2anc 691	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘) = 𝐵)
42	41	oveq2d 6565	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → (𝐶 · ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘)) = (𝐶 · 𝐵))
43	39, 42	eqtr4d 2647	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘𝑘) = (𝐶 · ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘)))
44	43	ralrimiva 2949	. . . . . . . . . . 11 ⊢ (𝜑 → ∀𝑘 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘𝑘) = (𝐶 · ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘)))
45	44	ad2antrr 758	. . . . . . . . . 10 ⊢ (((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) ∧ 𝑛 ∈ (1...(#‘𝐴))) → ∀𝑘 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘𝑘) = (𝐶 · ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘)))
46		nffvmpt1 6111	. . . . . . . . . . . 12 ⊢ Ⅎ𝑘((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘(𝑓‘𝑛))
47		nfcv 2751	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑘𝐶
48		nfcv 2751	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑘 ·
49		nffvmpt1 6111	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑘((𝑘 ∈ 𝐴 ↦ 𝐵)‘(𝑓‘𝑛))
50	47, 48, 49	nfov 6575	. . . . . . . . . . . 12 ⊢ Ⅎ𝑘(𝐶 · ((𝑘 ∈ 𝐴 ↦ 𝐵)‘(𝑓‘𝑛)))
51	46, 50	nfeq 2762	. . . . . . . . . . 11 ⊢ Ⅎ𝑘((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘(𝑓‘𝑛)) = (𝐶 · ((𝑘 ∈ 𝐴 ↦ 𝐵)‘(𝑓‘𝑛)))
52		fveq2 6103	. . . . . . . . . . . 12 ⊢ (𝑘 = (𝑓‘𝑛) → ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘𝑘) = ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘(𝑓‘𝑛)))
53		fveq2 6103	. . . . . . . . . . . . 13 ⊢ (𝑘 = (𝑓‘𝑛) → ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘) = ((𝑘 ∈ 𝐴 ↦ 𝐵)‘(𝑓‘𝑛)))
54	53	oveq2d 6565	. . . . . . . . . . . 12 ⊢ (𝑘 = (𝑓‘𝑛) → (𝐶 · ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘)) = (𝐶 · ((𝑘 ∈ 𝐴 ↦ 𝐵)‘(𝑓‘𝑛))))
55	52, 54	eqeq12d 2625	. . . . . . . . . . 11 ⊢ (𝑘 = (𝑓‘𝑛) → (((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘𝑘) = (𝐶 · ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘)) ↔ ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘(𝑓‘𝑛)) = (𝐶 · ((𝑘 ∈ 𝐴 ↦ 𝐵)‘(𝑓‘𝑛)))))
56	51, 55	rspc 3276	. . . . . . . . . 10 ⊢ ((𝑓‘𝑛) ∈ 𝐴 → (∀𝑘 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘𝑘) = (𝐶 · ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘)) → ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘(𝑓‘𝑛)) = (𝐶 · ((𝑘 ∈ 𝐴 ↦ 𝐵)‘(𝑓‘𝑛)))))
57	33, 45, 56	sylc 63	. . . . . . . . 9 ⊢ (((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) ∧ 𝑛 ∈ (1...(#‘𝐴))) → ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘(𝑓‘𝑛)) = (𝐶 · ((𝑘 ∈ 𝐴 ↦ 𝐵)‘(𝑓‘𝑛))))
58	27	ad2antll 761	. . . . . . . . . 10 ⊢ ((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) → 𝑓:(1...(#‘𝐴))⟶𝐴)
59		fvco3 6185	. . . . . . . . . 10 ⊢ ((𝑓:(1...(#‘𝐴))⟶𝐴 ∧ 𝑛 ∈ (1...(#‘𝐴))) → (((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵)) ∘ 𝑓)‘𝑛) = ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘(𝑓‘𝑛)))
60	58, 59	sylan 487	. . . . . . . . 9 ⊢ (((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) ∧ 𝑛 ∈ (1...(#‘𝐴))) → (((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵)) ∘ 𝑓)‘𝑛) = ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘(𝑓‘𝑛)))
61		fvco3 6185	. . . . . . . . . . 11 ⊢ ((𝑓:(1...(#‘𝐴))⟶𝐴 ∧ 𝑛 ∈ (1...(#‘𝐴))) → (((𝑘 ∈ 𝐴 ↦ 𝐵) ∘ 𝑓)‘𝑛) = ((𝑘 ∈ 𝐴 ↦ 𝐵)‘(𝑓‘𝑛)))
62	58, 61	sylan 487	. . . . . . . . . 10 ⊢ (((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) ∧ 𝑛 ∈ (1...(#‘𝐴))) → (((𝑘 ∈ 𝐴 ↦ 𝐵) ∘ 𝑓)‘𝑛) = ((𝑘 ∈ 𝐴 ↦ 𝐵)‘(𝑓‘𝑛)))
63	62	oveq2d 6565	. . . . . . . . 9 ⊢ (((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) ∧ 𝑛 ∈ (1...(#‘𝐴))) → (𝐶 · (((𝑘 ∈ 𝐴 ↦ 𝐵) ∘ 𝑓)‘𝑛)) = (𝐶 · ((𝑘 ∈ 𝐴 ↦ 𝐵)‘(𝑓‘𝑛))))
64	57, 60, 63	3eqtr4d 2654	. . . . . . . 8 ⊢ (((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) ∧ 𝑛 ∈ (1...(#‘𝐴))) → (((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵)) ∘ 𝑓)‘𝑛) = (𝐶 · (((𝑘 ∈ 𝐴 ↦ 𝐵) ∘ 𝑓)‘𝑛)))
65	13, 17, 20, 32, 64	seqdistr 12714	. . . . . . 7 ⊢ ((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) → (seq1( + , ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵)) ∘ 𝑓))‘(#‘𝐴)) = (𝐶 · (seq1( + , ((𝑘 ∈ 𝐴 ↦ 𝐵) ∘ 𝑓))‘(#‘𝐴))))
66		fveq2 6103	. . . . . . . 8 ⊢ (𝑚 = (𝑓‘𝑛) → ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘𝑚) = ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘(𝑓‘𝑛)))
67	36, 37	fmptd 6292	. . . . . . . . . 10 ⊢ (𝜑 → (𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵)):𝐴⟶ℂ)
68	67	adantr 480	. . . . . . . . 9 ⊢ ((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) → (𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵)):𝐴⟶ℂ)
69	68	ffvelrnda 6267	. . . . . . . 8 ⊢ (((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) ∧ 𝑚 ∈ 𝐴) → ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘𝑚) ∈ ℂ)
70	66, 18, 25, 69, 60	fsum 14298	. . . . . . 7 ⊢ ((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) → Σ𝑚 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘𝑚) = (seq1( + , ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵)) ∘ 𝑓))‘(#‘𝐴)))
71		fveq2 6103	. . . . . . . . 9 ⊢ (𝑚 = (𝑓‘𝑛) → ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑚) = ((𝑘 ∈ 𝐴 ↦ 𝐵)‘(𝑓‘𝑛)))
72	23	adantr 480	. . . . . . . . . 10 ⊢ ((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) → (𝑘 ∈ 𝐴 ↦ 𝐵):𝐴⟶ℂ)
73	72	ffvelrnda 6267	. . . . . . . . 9 ⊢ (((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) ∧ 𝑚 ∈ 𝐴) → ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑚) ∈ ℂ)
74	71, 18, 25, 73, 62	fsum 14298	. . . . . . . 8 ⊢ ((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) → Σ𝑚 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑚) = (seq1( + , ((𝑘 ∈ 𝐴 ↦ 𝐵) ∘ 𝑓))‘(#‘𝐴)))
75	74	oveq2d 6565	. . . . . . 7 ⊢ ((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) → (𝐶 · Σ𝑚 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑚)) = (𝐶 · (seq1( + , ((𝑘 ∈ 𝐴 ↦ 𝐵) ∘ 𝑓))‘(#‘𝐴))))
76	65, 70, 75	3eqtr4rd 2655	. . . . . 6 ⊢ ((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) → (𝐶 · Σ𝑚 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑚)) = Σ𝑚 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘𝑚))
77		sumfc 14287	. . . . . . 7 ⊢ Σ𝑚 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑚) = Σ𝑘 ∈ 𝐴 𝐵
78	77	oveq2i 6560	. . . . . 6 ⊢ (𝐶 · Σ𝑚 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑚)) = (𝐶 · Σ𝑘 ∈ 𝐴 𝐵)
79		sumfc 14287	. . . . . 6 ⊢ Σ𝑚 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ (𝐶 · 𝐵))‘𝑚) = Σ𝑘 ∈ 𝐴 (𝐶 · 𝐵)
80	76, 78, 79	3eqtr3g 2667	. . . . 5 ⊢ ((𝜑 ∧ ((#‘𝐴) ∈ ℕ ∧ 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)) → (𝐶 · Σ𝑘 ∈ 𝐴 𝐵) = Σ𝑘 ∈ 𝐴 (𝐶 · 𝐵))
81	80	expr 641	. . . 4 ⊢ ((𝜑 ∧ (#‘𝐴) ∈ ℕ) → (𝑓:(1...(#‘𝐴))–1-1-onto→𝐴 → (𝐶 · Σ𝑘 ∈ 𝐴 𝐵) = Σ𝑘 ∈ 𝐴 (𝐶 · 𝐵)))
82	81	exlimdv 1848	. . 3 ⊢ ((𝜑 ∧ (#‘𝐴) ∈ ℕ) → (∃𝑓 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴 → (𝐶 · Σ𝑘 ∈ 𝐴 𝐵) = Σ𝑘 ∈ 𝐴 (𝐶 · 𝐵)))
83	82	expimpd 627	. 2 ⊢ (𝜑 → (((#‘𝐴) ∈ ℕ ∧ ∃𝑓 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴) → (𝐶 · Σ𝑘 ∈ 𝐴 𝐵) = Σ𝑘 ∈ 𝐴 (𝐶 · 𝐵)))
84		fsummulc2.1	. . 3 ⊢ (𝜑 → 𝐴 ∈ Fin)
85		fz1f1o 14288	. . 3 ⊢ (𝐴 ∈ Fin → (𝐴 = ∅ ∨ ((#‘𝐴) ∈ ℕ ∧ ∃𝑓 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)))
86	84, 85	syl 17	. 2 ⊢ (𝜑 → (𝐴 = ∅ ∨ ((#‘𝐴) ∈ ℕ ∧ ∃𝑓 𝑓:(1...(#‘𝐴))–1-1-onto→𝐴)))
87	11, 83, 86	mpjaod 395	1 ⊢ (𝜑 → (𝐶 · Σ𝑘 ∈ 𝐴 𝐵) = Σ𝑘 ∈ 𝐴 (𝐶 · 𝐵))

Syntax hints:   → wi 4   ∨ wo 382   ∧ wa 383   = wceq 1475  ∃wex 1695   ∈ wcel 1977  ∀wral 2896  ∅c0 3874   ↦ cmpt 4643   ∘ ccom 5042  ⟶wf 5800  –1-1-onto→wf1o 5803  ‘cfv 5804  (class class class)co 6549  Fincfn 7841  ℂcc 9813  0cc0 9815  1c1 9816   + caddc 9818   · cmul 9820  ℕcn 10897  ℤ_≥cuz 11563  ...cfz 12197  seqcseq 12663  #chash 12979  Σcsu 14264

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-inf2 8421  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892  ax-pre-sup 9893

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-fal 1481  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rmo 2904  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-int 4411  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-se 4998  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-isom 5813  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-1st 7059  df-2nd 7060  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-1o 7447  df-oadd 7451  df-er 7629  df-en 7842  df-dom 7843  df-sdom 7844  df-fin 7845  df-sup 8231  df-oi 8298  df-card 8648  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-div 10564  df-nn 10898  df-2 10956  df-3 10957  df-n0 11170  df-z 11255  df-uz 11564  df-rp 11709  df-fz 12198  df-fzo 12335  df-seq 12664  df-exp 12723  df-hash 12980  df-cj 13687  df-re 13688  df-im 13689  df-sqrt 13823  df-abs 13824  df-clim 14067  df-sum 14265

This theorem is referenced by:  fsummulc1  14359  fsumneg  14361  fsum2mul  14363  incexc2  14409  mertens  14457  binomrisefac  14612  fsumkthpow  14626  eirrlem  14771  pwp1fsum  14952  csbren  22990  trirn  22991  itg1addlem4  23272  itg1addlem5  23273  itg1mulc  23277  elqaalem3  23880  advlogexp  24201  fsumharmonic  24538  basellem8  24614  muinv  24719  fsumdvdsmul  24721  logfaclbnd  24747  dchrsum2  24793  sumdchr2  24795  rplogsumlem2  24974  rpvmasumlem  24976  dchrmusum2  24983  dchrvmasumlem1  24984  dchrvmasum2lem  24985  dchrvmasumlem2  24987  dchrvmasumiflem1  24990  rpvmasum2  25001  dchrisum0lem2  25007  mudivsum  25019  mulogsum  25021  mulog2sumlem1  25023  mulog2sumlem2  25024  mulog2sumlem3  25025  vmalogdivsum2  25027  logsqvma  25031  selberglem1  25034  selberglem2  25035  selberg  25037  selberg3lem1  25046  selberg4lem1  25049  selberg4  25050  selbergr  25057  selberg3r  25058  selberg34r  25060  pntsval2  25065  pntrlog2bndlem2  25067  pntrlog2bndlem3  25068  pntrlog2bndlem4  25069  pntrlog2bndlem6  25072  pntpbnd2  25076  pntlemk  25095  axsegconlem9  25605  ax5seglem1  25608  ax5seglem2  25609  ax5seglem9  25617  knoppndvlem11  31683  jm2.22  36580  dvnprodlem2  38837  stoweidlem26  38919  stirlinglem12  38978  fourierdlem83  39082  etransclem46  39173  pwdif  40039  altgsumbcALT  41924  aacllem  42356