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Theorem isumshft 11498

Description: Index shift of an infinite sum. (Contributed by Paul Chapman, 31-Oct-2007.) (Revised by Mario Carneiro, 24-Apr-2014.)

**Hypotheses**
Ref	Expression
isumshft.1	⊢ 𝑍 = (ℤ_≥‘𝑀)
isumshft.2	⊢ 𝑊 = (ℤ_≥‘(𝑀 + 𝐾))
isumshft.3	⊢ (𝑗 = (𝐾 + 𝑘) → 𝐴 = 𝐵)
isumshft.4	⊢ (𝜑 → 𝐾 ∈ ℤ)
isumshft.5	⊢ (𝜑 → 𝑀 ∈ ℤ)
isumshft.6	⊢ ((𝜑 ∧ 𝑗 ∈ 𝑊) → 𝐴 ∈ ℂ)

**Assertion**
Ref	Expression
isumshft	⊢ (𝜑 → Σ𝑗 ∈ 𝑊 𝐴 = Σ𝑘 ∈ 𝑍 𝐵)

Distinct variable groups: 𝐴,𝑘 𝑗,𝑘,𝐾 𝜑,𝑗,𝑘 𝑗,𝑊,𝑘 𝐵,𝑗 𝑗,𝑍,𝑘 Allowed substitution hints: 𝐴(𝑗) 𝐵(𝑘) 𝑀(𝑗,𝑘)

Proof of Theorem isumshft Dummy variables 𝑚 𝑛 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		isumshft.5	. . . . . . . . 9 ⊢ (𝜑 → 𝑀 ∈ ℤ)
2		isumshft.4	. . . . . . . . 9 ⊢ (𝜑 → 𝐾 ∈ ℤ)
3	1, 2	zaddcld 9379	. . . . . . . 8 ⊢ (𝜑 → (𝑀 + 𝐾) ∈ ℤ)
4		isumshft.2	. . . . . . . . . . . . 13 ⊢ 𝑊 = (ℤ_≥‘(𝑀 + 𝐾))
5	4	eleq2i 2244	. . . . . . . . . . . 12 ⊢ (𝑥 ∈ 𝑊 ↔ 𝑥 ∈ (ℤ_≥‘(𝑀 + 𝐾)))
6	5	biimpri 133	. . . . . . . . . . 11 ⊢ (𝑥 ∈ (ℤ_≥‘(𝑀 + 𝐾)) → 𝑥 ∈ 𝑊)
7	6	adantl 277	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℤ_≥‘(𝑀 + 𝐾))) → 𝑥 ∈ 𝑊)
8		isumshft.6	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝑊) → 𝐴 ∈ ℂ)
9	8	ralrimiva 2550	. . . . . . . . . . . 12 ⊢ (𝜑 → ∀𝑗 ∈ 𝑊 𝐴 ∈ ℂ)
10	9	adantr 276	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℤ_≥‘(𝑀 + 𝐾))) → ∀𝑗 ∈ 𝑊 𝐴 ∈ ℂ)
11		nfcsb1v 3091	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑗⦋𝑥 / 𝑗⦌𝐴
12	11	nfel1 2330	. . . . . . . . . . . 12 ⊢ Ⅎ𝑗⦋𝑥 / 𝑗⦌𝐴 ∈ ℂ
13		csbeq1a 3067	. . . . . . . . . . . . 13 ⊢ (𝑗 = 𝑥 → 𝐴 = ⦋𝑥 / 𝑗⦌𝐴)
14	13	eleq1d 2246	. . . . . . . . . . . 12 ⊢ (𝑗 = 𝑥 → (𝐴 ∈ ℂ ↔ ⦋𝑥 / 𝑗⦌𝐴 ∈ ℂ))
15	12, 14	rspc 2836	. . . . . . . . . . 11 ⊢ (𝑥 ∈ 𝑊 → (∀𝑗 ∈ 𝑊 𝐴 ∈ ℂ → ⦋𝑥 / 𝑗⦌𝐴 ∈ ℂ))
16	7, 10, 15	sylc 62	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℤ_≥‘(𝑀 + 𝐾))) → ⦋𝑥 / 𝑗⦌𝐴 ∈ ℂ)
17		eqid 2177	. . . . . . . . . . 11 ⊢ (𝑗 ∈ 𝑊 ↦ 𝐴) = (𝑗 ∈ 𝑊 ↦ 𝐴)
18	17	fvmpts 5595	. . . . . . . . . 10 ⊢ ((𝑥 ∈ 𝑊 ∧ ⦋𝑥 / 𝑗⦌𝐴 ∈ ℂ) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑥) = ⦋𝑥 / 𝑗⦌𝐴)
19	7, 16, 18	syl2anc 411	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℤ_≥‘(𝑀 + 𝐾))) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑥) = ⦋𝑥 / 𝑗⦌𝐴)
20	19, 16	eqeltrd 2254	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℤ_≥‘(𝑀 + 𝐾))) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑥) ∈ ℂ)
21	4	eleq2i 2244	. . . . . . . . 9 ⊢ (𝑚 ∈ 𝑊 ↔ 𝑚 ∈ (ℤ_≥‘(𝑀 + 𝐾)))
22	2	zcnd 9376	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐾 ∈ ℂ)
23		eluzelcn 9539	. . . . . . . . . . . 12 ⊢ (𝑚 ∈ (ℤ_≥‘(𝑀 + 𝐾)) → 𝑚 ∈ ℂ)
24	23, 4	eleq2s 2272	. . . . . . . . . . 11 ⊢ (𝑚 ∈ 𝑊 → 𝑚 ∈ ℂ)
25		zex 9262	. . . . . . . . . . . . . 14 ⊢ ℤ ∈ V
26		isumshft.1	. . . . . . . . . . . . . . 15 ⊢ 𝑍 = (ℤ_≥‘𝑀)
27		uzssz 9547	. . . . . . . . . . . . . . 15 ⊢ (ℤ_≥‘𝑀) ⊆ ℤ
28	26, 27	eqsstri 3188	. . . . . . . . . . . . . 14 ⊢ 𝑍 ⊆ ℤ
29	25, 28	ssexi 4142	. . . . . . . . . . . . 13 ⊢ 𝑍 ∈ V
30	29	mptex 5743	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ 𝑍 ↦ 𝐵) ∈ V
31	30	shftval 10834	. . . . . . . . . . 11 ⊢ ((𝐾 ∈ ℂ ∧ 𝑚 ∈ ℂ) → (((𝑘 ∈ 𝑍 ↦ 𝐵) shift 𝐾)‘𝑚) = ((𝑘 ∈ 𝑍 ↦ 𝐵)‘(𝑚 − 𝐾)))
32	22, 24, 31	syl2an 289	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → (((𝑘 ∈ 𝑍 ↦ 𝐵) shift 𝐾)‘𝑚) = ((𝑘 ∈ 𝑍 ↦ 𝐵)‘(𝑚 − 𝐾)))
33		eqidd 2178	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → (𝑘 ∈ 𝑍 ↦ 𝐵) = (𝑘 ∈ 𝑍 ↦ 𝐵))
34		isumshft.3	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑗 = (𝐾 + 𝑘) → 𝐴 = 𝐵)
35	34	eleq1d 2246	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑗 = (𝐾 + 𝑘) → (𝐴 ∈ ℂ ↔ 𝐵 ∈ ℂ))
36	9	adantr 276	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → ∀𝑗 ∈ 𝑊 𝐴 ∈ ℂ)
37	1	adantr 276	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝑀 ∈ ℤ)
38	2	adantr 276	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝐾 ∈ ℤ)
39	37, 38	zaddcld 9379	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝑀 + 𝐾) ∈ ℤ)
40		eluzelz 9537	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑘 ∈ (ℤ_≥‘𝑀) → 𝑘 ∈ ℤ)
41	40, 26	eleq2s 2272	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑘 ∈ 𝑍 → 𝑘 ∈ ℤ)
42	41	adantl 277	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝑘 ∈ ℤ)
43	38, 42	zaddcld 9379	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐾 + 𝑘) ∈ ℤ)
44	37	zred 9375	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝑀 ∈ ℝ)
45	42	zred 9375	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝑘 ∈ ℝ)
46	38	zred 9375	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝐾 ∈ ℝ)
47	26	eleq2i 2244	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝑘 ∈ 𝑍 ↔ 𝑘 ∈ (ℤ_≥‘𝑀))
48	47	biimpi 120	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑘 ∈ 𝑍 → 𝑘 ∈ (ℤ_≥‘𝑀))
49	48	adantl 277	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝑘 ∈ (ℤ_≥‘𝑀))
50		eluzle 9540	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑘 ∈ (ℤ_≥‘𝑀) → 𝑀 ≤ 𝑘)
51	49, 50	syl 14	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝑀 ≤ 𝑘)
52	44, 45, 46, 51	leadd1dd 8516	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝑀 + 𝐾) ≤ (𝑘 + 𝐾))
53	42	zcnd 9376	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝑘 ∈ ℂ)
54	38	zcnd 9376	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝐾 ∈ ℂ)
55	53, 54	addcomd 8108	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝑘 + 𝐾) = (𝐾 + 𝑘))
56	52, 55	breqtrd 4030	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝑀 + 𝐾) ≤ (𝐾 + 𝑘))
57		eluz2 9534	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐾 + 𝑘) ∈ (ℤ_≥‘(𝑀 + 𝐾)) ↔ ((𝑀 + 𝐾) ∈ ℤ ∧ (𝐾 + 𝑘) ∈ ℤ ∧ (𝑀 + 𝐾) ≤ (𝐾 + 𝑘)))
58	39, 43, 56, 57	syl3anbrc 1181	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐾 + 𝑘) ∈ (ℤ_≥‘(𝑀 + 𝐾)))
59	58, 4	eleqtrrdi 2271	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐾 + 𝑘) ∈ 𝑊)
60	35, 36, 59	rspcdva 2847	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝐵 ∈ ℂ)
61	33, 60	fvmpt2d 5603	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑘) = 𝐵)
62		eqidd 2178	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝑗 ∈ 𝑊 ↦ 𝐴) = (𝑗 ∈ 𝑊 ↦ 𝐴))
63	34	adantl 277	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑍) ∧ 𝑗 = (𝐾 + 𝑘)) → 𝐴 = 𝐵)
64	62, 63, 59, 60	fvmptd 5598	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑘)) = 𝐵)
65	61, 64	eqtr4d 2213	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑘) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑘)))
66	65	ralrimiva 2550	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ∀𝑘 ∈ 𝑍 ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑘) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑘)))
67		nffvmpt1 5527	. . . . . . . . . . . . . . . 16 ⊢ Ⅎ𝑘((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛)
68	67	nfeq1 2329	. . . . . . . . . . . . . . 15 ⊢ Ⅎ𝑘((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛))
69		fveq2 5516	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 = 𝑛 → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑘) = ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛))
70		oveq2 5883	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 = 𝑛 → (𝐾 + 𝑘) = (𝐾 + 𝑛))
71	70	fveq2d 5520	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 = 𝑛 → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑘)) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛)))
72	69, 71	eqeq12d 2192	. . . . . . . . . . . . . . 15 ⊢ (𝑘 = 𝑛 → (((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑘) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑘)) ↔ ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛))))
73	68, 72	rspc 2836	. . . . . . . . . . . . . 14 ⊢ (𝑛 ∈ 𝑍 → (∀𝑘 ∈ 𝑍 ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑘) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑘)) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛))))
74	66, 73	mpan9 281	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛)))
75	74	ralrimiva 2550	. . . . . . . . . . . 12 ⊢ (𝜑 → ∀𝑛 ∈ 𝑍 ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛)))
76	75	adantr 276	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → ∀𝑛 ∈ 𝑍 ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛)))
77	1	adantr 276	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → 𝑀 ∈ ℤ)
78	2	adantr 276	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → 𝐾 ∈ ℤ)
79		simpr 110	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → 𝑚 ∈ 𝑊)
80	79, 4	eleqtrdi 2270	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → 𝑚 ∈ (ℤ_≥‘(𝑀 + 𝐾)))
81		eluzsub 9557	. . . . . . . . . . . . 13 ⊢ ((𝑀 ∈ ℤ ∧ 𝐾 ∈ ℤ ∧ 𝑚 ∈ (ℤ_≥‘(𝑀 + 𝐾))) → (𝑚 − 𝐾) ∈ (ℤ_≥‘𝑀))
82	77, 78, 80, 81	syl3anc 1238	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → (𝑚 − 𝐾) ∈ (ℤ_≥‘𝑀))
83	82, 26	eleqtrrdi 2271	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → (𝑚 − 𝐾) ∈ 𝑍)
84		fveq2 5516	. . . . . . . . . . . . 13 ⊢ (𝑛 = (𝑚 − 𝐾) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑘 ∈ 𝑍 ↦ 𝐵)‘(𝑚 − 𝐾)))
85		oveq2 5883	. . . . . . . . . . . . . 14 ⊢ (𝑛 = (𝑚 − 𝐾) → (𝐾 + 𝑛) = (𝐾 + (𝑚 − 𝐾)))
86	85	fveq2d 5520	. . . . . . . . . . . . 13 ⊢ (𝑛 = (𝑚 − 𝐾) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛)) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + (𝑚 − 𝐾))))
87	84, 86	eqeq12d 2192	. . . . . . . . . . . 12 ⊢ (𝑛 = (𝑚 − 𝐾) → (((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛)) ↔ ((𝑘 ∈ 𝑍 ↦ 𝐵)‘(𝑚 − 𝐾)) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + (𝑚 − 𝐾)))))
88	87	rspccva 2841	. . . . . . . . . . 11 ⊢ ((∀𝑛 ∈ 𝑍 ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛)) ∧ (𝑚 − 𝐾) ∈ 𝑍) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘(𝑚 − 𝐾)) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + (𝑚 − 𝐾))))
89	76, 83, 88	syl2anc 411	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘(𝑚 − 𝐾)) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + (𝑚 − 𝐾))))
90		pncan3 8165	. . . . . . . . . . . 12 ⊢ ((𝐾 ∈ ℂ ∧ 𝑚 ∈ ℂ) → (𝐾 + (𝑚 − 𝐾)) = 𝑚)
91	22, 24, 90	syl2an 289	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → (𝐾 + (𝑚 − 𝐾)) = 𝑚)
92	91	fveq2d 5520	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + (𝑚 − 𝐾))) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚))
93	32, 89, 92	3eqtrrd 2215	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚) = (((𝑘 ∈ 𝑍 ↦ 𝐵) shift 𝐾)‘𝑚))
94	21, 93	sylan2br 288	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑚 ∈ (ℤ_≥‘(𝑀 + 𝐾))) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚) = (((𝑘 ∈ 𝑍 ↦ 𝐵) shift 𝐾)‘𝑚))
95		addcl 7936	. . . . . . . . 9 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (𝑥 + 𝑦) ∈ ℂ)
96	95	adantl 277	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ)) → (𝑥 + 𝑦) ∈ ℂ)
97	3, 20, 94, 96	seq3feq 10472	. . . . . . 7 ⊢ (𝜑 → seq(𝑀 + 𝐾)( + , (𝑗 ∈ 𝑊 ↦ 𝐴)) = seq(𝑀 + 𝐾)( + , ((𝑘 ∈ 𝑍 ↦ 𝐵) shift 𝐾)))
98	97	breq1d 4014	. . . . . 6 ⊢ (𝜑 → (seq(𝑀 + 𝐾)( + , (𝑗 ∈ 𝑊 ↦ 𝐴)) ⇝ 𝑥 ↔ seq(𝑀 + 𝐾)( + , ((𝑘 ∈ 𝑍 ↦ 𝐵) shift 𝐾)) ⇝ 𝑥))
99	30	a1i 9	. . . . . . 7 ⊢ (𝜑 → (𝑘 ∈ 𝑍 ↦ 𝐵) ∈ V)
100	26	eleq2i 2244	. . . . . . . . . . 11 ⊢ (𝑥 ∈ 𝑍 ↔ 𝑥 ∈ (ℤ_≥‘𝑀))
101	100	biimpri 133	. . . . . . . . . 10 ⊢ (𝑥 ∈ (ℤ_≥‘𝑀) → 𝑥 ∈ 𝑍)
102	101	adantl 277	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℤ_≥‘𝑀)) → 𝑥 ∈ 𝑍)
103	60	ralrimiva 2550	. . . . . . . . . . 11 ⊢ (𝜑 → ∀𝑘 ∈ 𝑍 𝐵 ∈ ℂ)
104	103	adantr 276	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℤ_≥‘𝑀)) → ∀𝑘 ∈ 𝑍 𝐵 ∈ ℂ)
105		nfcsb1v 3091	. . . . . . . . . . . 12 ⊢ Ⅎ𝑘⦋𝑥 / 𝑘⦌𝐵
106	105	nfel1 2330	. . . . . . . . . . 11 ⊢ Ⅎ𝑘⦋𝑥 / 𝑘⦌𝐵 ∈ ℂ
107		csbeq1a 3067	. . . . . . . . . . . 12 ⊢ (𝑘 = 𝑥 → 𝐵 = ⦋𝑥 / 𝑘⦌𝐵)
108	107	eleq1d 2246	. . . . . . . . . . 11 ⊢ (𝑘 = 𝑥 → (𝐵 ∈ ℂ ↔ ⦋𝑥 / 𝑘⦌𝐵 ∈ ℂ))
109	106, 108	rspc 2836	. . . . . . . . . 10 ⊢ (𝑥 ∈ 𝑍 → (∀𝑘 ∈ 𝑍 𝐵 ∈ ℂ → ⦋𝑥 / 𝑘⦌𝐵 ∈ ℂ))
110	102, 104, 109	sylc 62	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℤ_≥‘𝑀)) → ⦋𝑥 / 𝑘⦌𝐵 ∈ ℂ)
111		eqid 2177	. . . . . . . . . 10 ⊢ (𝑘 ∈ 𝑍 ↦ 𝐵) = (𝑘 ∈ 𝑍 ↦ 𝐵)
112	111	fvmpts 5595	. . . . . . . . 9 ⊢ ((𝑥 ∈ 𝑍 ∧ ⦋𝑥 / 𝑘⦌𝐵 ∈ ℂ) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑥) = ⦋𝑥 / 𝑘⦌𝐵)
113	102, 110, 112	syl2anc 411	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℤ_≥‘𝑀)) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑥) = ⦋𝑥 / 𝑘⦌𝐵)
114	113, 110	eqeltrd 2254	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℤ_≥‘𝑀)) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑥) ∈ ℂ)
115	99, 1, 2, 114, 96	iser3shft 11354	. . . . . 6 ⊢ (𝜑 → (seq𝑀( + , (𝑘 ∈ 𝑍 ↦ 𝐵)) ⇝ 𝑥 ↔ seq(𝑀 + 𝐾)( + , ((𝑘 ∈ 𝑍 ↦ 𝐵) shift 𝐾)) ⇝ 𝑥))
116	98, 115	bitr4d 191	. . . . 5 ⊢ (𝜑 → (seq(𝑀 + 𝐾)( + , (𝑗 ∈ 𝑊 ↦ 𝐴)) ⇝ 𝑥 ↔ seq𝑀( + , (𝑘 ∈ 𝑍 ↦ 𝐵)) ⇝ 𝑥))
117	116	iotabidv 5200	. . . 4 ⊢ (𝜑 → (℩𝑥seq(𝑀 + 𝐾)( + , (𝑗 ∈ 𝑊 ↦ 𝐴)) ⇝ 𝑥) = (℩𝑥seq𝑀( + , (𝑘 ∈ 𝑍 ↦ 𝐵)) ⇝ 𝑥))
118		df-fv 5225	. . . 4 ⊢ ( ⇝ ‘seq(𝑀 + 𝐾)( + , (𝑗 ∈ 𝑊 ↦ 𝐴))) = (℩𝑥seq(𝑀 + 𝐾)( + , (𝑗 ∈ 𝑊 ↦ 𝐴)) ⇝ 𝑥)
119		df-fv 5225	. . . 4 ⊢ ( ⇝ ‘seq𝑀( + , (𝑘 ∈ 𝑍 ↦ 𝐵))) = (℩𝑥seq𝑀( + , (𝑘 ∈ 𝑍 ↦ 𝐵)) ⇝ 𝑥)
120	117, 118, 119	3eqtr4g 2235	. . 3 ⊢ (𝜑 → ( ⇝ ‘seq(𝑀 + 𝐾)( + , (𝑗 ∈ 𝑊 ↦ 𝐴))) = ( ⇝ ‘seq𝑀( + , (𝑘 ∈ 𝑍 ↦ 𝐵))))
121		eqidd 2178	. . . 4 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚))
122	8	fmpttd 5672	. . . . 5 ⊢ (𝜑 → (𝑗 ∈ 𝑊 ↦ 𝐴):𝑊⟶ℂ)
123	122	ffvelcdmda 5652	. . . 4 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚) ∈ ℂ)
124	4, 3, 121, 123	isum 11393	. . 3 ⊢ (𝜑 → Σ𝑚 ∈ 𝑊 ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚) = ( ⇝ ‘seq(𝑀 + 𝐾)( + , (𝑗 ∈ 𝑊 ↦ 𝐴))))
125		eqidd 2178	. . . 4 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛))
126	122	adantr 276	. . . . . 6 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝑗 ∈ 𝑊 ↦ 𝐴):𝑊⟶ℂ)
127		eluzelcn 9539	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ (ℤ_≥‘𝑀) → 𝑘 ∈ ℂ)
128	127, 26	eleq2s 2272	. . . . . . . . . . 11 ⊢ (𝑘 ∈ 𝑍 → 𝑘 ∈ ℂ)
129		addcom 8094	. . . . . . . . . . 11 ⊢ ((𝐾 ∈ ℂ ∧ 𝑘 ∈ ℂ) → (𝐾 + 𝑘) = (𝑘 + 𝐾))
130	22, 128, 129	syl2an 289	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐾 + 𝑘) = (𝑘 + 𝐾))
131		id 19	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ 𝑍 → 𝑘 ∈ 𝑍)
132	131, 26	eleqtrdi 2270	. . . . . . . . . . 11 ⊢ (𝑘 ∈ 𝑍 → 𝑘 ∈ (ℤ_≥‘𝑀))
133		eluzadd 9556	. . . . . . . . . . 11 ⊢ ((𝑘 ∈ (ℤ_≥‘𝑀) ∧ 𝐾 ∈ ℤ) → (𝑘 + 𝐾) ∈ (ℤ_≥‘(𝑀 + 𝐾)))
134	132, 2, 133	syl2anr 290	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝑘 + 𝐾) ∈ (ℤ_≥‘(𝑀 + 𝐾)))
135	130, 134	eqeltrd 2254	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐾 + 𝑘) ∈ (ℤ_≥‘(𝑀 + 𝐾)))
136	135, 4	eleqtrrdi 2271	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐾 + 𝑘) ∈ 𝑊)
137	136	ralrimiva 2550	. . . . . . 7 ⊢ (𝜑 → ∀𝑘 ∈ 𝑍 (𝐾 + 𝑘) ∈ 𝑊)
138	70	eleq1d 2246	. . . . . . . 8 ⊢ (𝑘 = 𝑛 → ((𝐾 + 𝑘) ∈ 𝑊 ↔ (𝐾 + 𝑛) ∈ 𝑊))
139	138	rspccva 2841	. . . . . . 7 ⊢ ((∀𝑘 ∈ 𝑍 (𝐾 + 𝑘) ∈ 𝑊 ∧ 𝑛 ∈ 𝑍) → (𝐾 + 𝑛) ∈ 𝑊)
140	137, 139	sylan 283	. . . . . 6 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝐾 + 𝑛) ∈ 𝑊)
141	126, 140	ffvelcdmd 5653	. . . . 5 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛)) ∈ ℂ)
142	74, 141	eqeltrd 2254	. . . 4 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) ∈ ℂ)
143	26, 1, 125, 142	isum 11393	. . 3 ⊢ (𝜑 → Σ𝑛 ∈ 𝑍 ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ( ⇝ ‘seq𝑀( + , (𝑘 ∈ 𝑍 ↦ 𝐵))))
144	120, 124, 143	3eqtr4d 2220	. 2 ⊢ (𝜑 → Σ𝑚 ∈ 𝑊 ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚) = Σ𝑛 ∈ 𝑍 ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛))
145		sumfct 11382	. . 3 ⊢ (∀𝑗 ∈ 𝑊 𝐴 ∈ ℂ → Σ𝑚 ∈ 𝑊 ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚) = Σ𝑗 ∈ 𝑊 𝐴)
146	9, 145	syl 14	. 2 ⊢ (𝜑 → Σ𝑚 ∈ 𝑊 ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚) = Σ𝑗 ∈ 𝑊 𝐴)
147		sumfct 11382	. . 3 ⊢ (∀𝑘 ∈ 𝑍 𝐵 ∈ ℂ → Σ𝑛 ∈ 𝑍 ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = Σ𝑘 ∈ 𝑍 𝐵)
148	103, 147	syl 14	. 2 ⊢ (𝜑 → Σ𝑛 ∈ 𝑍 ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = Σ𝑘 ∈ 𝑍 𝐵)
149	144, 146, 148	3eqtr3d 2218	1 ⊢ (𝜑 → Σ𝑗 ∈ 𝑊 𝐴 = Σ𝑘 ∈ 𝑍 𝐵)

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 104 = wceq 1353 ∈ wcel 2148 ∀wral 2455 Vcvv 2738 ⦋csb 3058 class class class wbr 4004 ↦ cmpt 4065 ℩cio 5177 ⟶wf 5213 ‘cfv 5217 (class class class)co 5875 ℂcc 7809 + caddc 7814 ≤ cle 7993 − cmin 8128 ℤcz 9253 ℤ_≥cuz 9528 seqcseq 10445 shift cshi 10823 ⇝ cli 11286 Σcsu 11361

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 614 ax-in2 615 ax-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-13 2150 ax-14 2151 ax-ext 2159 ax-coll 4119 ax-sep 4122 ax-nul 4130 ax-pow 4175 ax-pr 4210 ax-un 4434 ax-setind 4537 ax-iinf 4588 ax-cnex 7902 ax-resscn 7903 ax-1cn 7904 ax-1re 7905 ax-icn 7906 ax-addcl 7907 ax-addrcl 7908 ax-mulcl 7909 ax-mulrcl 7910 ax-addcom 7911 ax-mulcom 7912 ax-addass 7913 ax-mulass 7914 ax-distr 7915 ax-i2m1 7916 ax-0lt1 7917 ax-1rid 7918 ax-0id 7919 ax-rnegex 7920 ax-precex 7921 ax-cnre 7922 ax-pre-ltirr 7923 ax-pre-ltwlin 7924 ax-pre-lttrn 7925 ax-pre-apti 7926 ax-pre-ltadd 7927 ax-pre-mulgt0 7928 ax-pre-mulext 7929

This theorem depends on definitions: df-bi 117 df-dc 835 df-3or 979 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ne 2348 df-nel 2443 df-ral 2460 df-rex 2461 df-reu 2462 df-rmo 2463 df-rab 2464 df-v 2740 df-sbc 2964 df-csb 3059 df-dif 3132 df-un 3134 df-in 3136 df-ss 3143 df-nul 3424 df-if 3536 df-pw 3578 df-sn 3599 df-pr 3600 df-op 3602 df-uni 3811 df-int 3846 df-iun 3889 df-br 4005 df-opab 4066 df-mpt 4067 df-tr 4103 df-id 4294 df-po 4297 df-iso 4298 df-iord 4367 df-on 4369 df-ilim 4370 df-suc 4372 df-iom 4591 df-xp 4633 df-rel 4634 df-cnv 4635 df-co 4636 df-dm 4637 df-rn 4638 df-res 4639 df-ima 4640 df-iota 5179 df-fun 5219 df-fn 5220 df-f 5221 df-f1 5222 df-fo 5223 df-f1o 5224 df-fv 5225 df-isom 5226 df-riota 5831 df-ov 5878 df-oprab 5879 df-mpo 5880 df-1st 6141 df-2nd 6142 df-recs 6306 df-irdg 6371 df-frec 6392 df-1o 6417 df-oadd 6421 df-er 6535 df-en 6741 df-dom 6742 df-fin 6743 df-pnf 7994 df-mnf 7995 df-xr 7996 df-ltxr 7997 df-le 7998 df-sub 8130 df-neg 8131 df-reap 8532 df-ap 8539 df-div 8630 df-inn 8920 df-2 8978 df-n0 9177 df-z 9254 df-uz 9529 df-q 9620 df-rp 9654 df-fz 10009 df-fzo 10143 df-seqfrec 10446 df-exp 10520 df-ihash 10756 df-shft 10824 df-cj 10851 df-rsqrt 11007 df-abs 11008 df-clim 11287 df-sumdc 11362

This theorem is referenced by: eftlub 11698

W3C validator