Theorem sumss 15083

Description: Change the index set to a subset in an upper integer sum. (Contributed by Mario Carneiro, 21-Apr-2014.)

Hypotheses

Ref	Expression
sumss.1	⊢ (𝜑 → 𝐴 ⊆ 𝐵)
sumss.2	⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐶 ∈ ℂ)
sumss.3	⊢ ((𝜑 ∧ 𝑘 ∈ (𝐵 ∖ 𝐴)) → 𝐶 = 0)
sumss.4	⊢ (𝜑 → 𝐵 ⊆ (ℤ≥‘𝑀))

Assertion

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

Distinct variable groups:   𝐴,𝑘   𝐵,𝑘   𝜑,𝑘   𝑘,𝑀

Allowed substitution hint:   𝐶(𝑘)

Proof of Theorem sumss

Dummy variable 𝑚 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqid 2823	. . . . 5 ⊢ (ℤ≥‘𝑀) = (ℤ≥‘𝑀)
2		simpr 487	. . . . 5 ⊢ ((𝜑 ∧ 𝑀 ∈ ℤ) → 𝑀 ∈ ℤ)
3		sumss.1	. . . . . . 7 ⊢ (𝜑 → 𝐴 ⊆ 𝐵)
4		sumss.4	. . . . . . 7 ⊢ (𝜑 → 𝐵 ⊆ (ℤ≥‘𝑀))
5	3, 4	sstrd 3979	. . . . . 6 ⊢ (𝜑 → 𝐴 ⊆ (ℤ≥‘𝑀))
6	5	adantr 483	. . . . 5 ⊢ ((𝜑 ∧ 𝑀 ∈ ℤ) → 𝐴 ⊆ (ℤ≥‘𝑀))
7		nfcv 2979	. . . . . . 7 ⊢ Ⅎ𝑘𝑚
8		nffvmpt1 6683	. . . . . . . 8 ⊢ Ⅎ𝑘((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑚)
9		nfv 1915	. . . . . . . . 9 ⊢ Ⅎ𝑘 𝑚 ∈ 𝐴
10		nffvmpt1 6683	. . . . . . . . 9 ⊢ Ⅎ𝑘((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑚)
11		nfcv 2979	. . . . . . . . 9 ⊢ Ⅎ𝑘0
12	9, 10, 11	nfif 4498	. . . . . . . 8 ⊢ Ⅎ𝑘if(𝑚 ∈ 𝐴, ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑚), 0)
13	8, 12	nfeq 2993	. . . . . . 7 ⊢ Ⅎ𝑘((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑚) = if(𝑚 ∈ 𝐴, ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑚), 0)
14		fveq2 6672	. . . . . . . 8 ⊢ (𝑘 = 𝑚 → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑘) = ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑚))
15		eleq1w 2897	. . . . . . . . 9 ⊢ (𝑘 = 𝑚 → (𝑘 ∈ 𝐴 ↔ 𝑚 ∈ 𝐴))
16		fveq2 6672	. . . . . . . . 9 ⊢ (𝑘 = 𝑚 → ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑘) = ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑚))
17	15, 16	ifbieq1d 4492	. . . . . . . 8 ⊢ (𝑘 = 𝑚 → if(𝑘 ∈ 𝐴, ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑘), 0) = if(𝑚 ∈ 𝐴, ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑚), 0))
18	14, 17	eqeq12d 2839	. . . . . . 7 ⊢ (𝑘 = 𝑚 → (((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑘) = if(𝑘 ∈ 𝐴, ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑘), 0) ↔ ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑚) = if(𝑚 ∈ 𝐴, ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑚), 0)))
19		eqid 2823	. . . . . . . . . . 11 ⊢ (𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0)) = (𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))
20	19	fvmpt2i 6780	. . . . . . . . . 10 ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑘) = ( I ‘if(𝑘 ∈ 𝐴, 𝐶, 0)))
21		iftrue 4475	. . . . . . . . . . 11 ⊢ (𝑘 ∈ 𝐴 → if(𝑘 ∈ 𝐴, 𝐶, 0) = 𝐶)
22	21	fveq2d 6676	. . . . . . . . . 10 ⊢ (𝑘 ∈ 𝐴 → ( I ‘if(𝑘 ∈ 𝐴, 𝐶, 0)) = ( I ‘𝐶))
23	20, 22	sylan9eq 2878	. . . . . . . . 9 ⊢ ((𝑘 ∈ (ℤ≥‘𝑀) ∧ 𝑘 ∈ 𝐴) → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑘) = ( I ‘𝐶))
24		iftrue 4475	. . . . . . . . . . 11 ⊢ (𝑘 ∈ 𝐴 → if(𝑘 ∈ 𝐴, ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑘), 0) = ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑘))
25		eqid 2823	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ 𝐴 ↦ 𝐶) = (𝑘 ∈ 𝐴 ↦ 𝐶)
26	25	fvmpt2i 6780	. . . . . . . . . . 11 ⊢ (𝑘 ∈ 𝐴 → ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑘) = ( I ‘𝐶))
27	24, 26	eqtrd 2858	. . . . . . . . . 10 ⊢ (𝑘 ∈ 𝐴 → if(𝑘 ∈ 𝐴, ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑘), 0) = ( I ‘𝐶))
28	27	adantl 484	. . . . . . . . 9 ⊢ ((𝑘 ∈ (ℤ≥‘𝑀) ∧ 𝑘 ∈ 𝐴) → if(𝑘 ∈ 𝐴, ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑘), 0) = ( I ‘𝐶))
29	23, 28	eqtr4d 2861	. . . . . . . 8 ⊢ ((𝑘 ∈ (ℤ≥‘𝑀) ∧ 𝑘 ∈ 𝐴) → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑘) = if(𝑘 ∈ 𝐴, ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑘), 0))
30		iffalse 4478	. . . . . . . . . . . 12 ⊢ (¬ 𝑘 ∈ 𝐴 → if(𝑘 ∈ 𝐴, 𝐶, 0) = 0)
31	30	fveq2d 6676	. . . . . . . . . . 11 ⊢ (¬ 𝑘 ∈ 𝐴 → ( I ‘if(𝑘 ∈ 𝐴, 𝐶, 0)) = ( I ‘0))
32		0z 11995	. . . . . . . . . . . 12 ⊢ 0 ∈ ℤ
33		fvi 6742	. . . . . . . . . . . 12 ⊢ (0 ∈ ℤ → ( I ‘0) = 0)
34	32, 33	ax-mp 5	. . . . . . . . . . 11 ⊢ ( I ‘0) = 0
35	31, 34	syl6eq 2874	. . . . . . . . . 10 ⊢ (¬ 𝑘 ∈ 𝐴 → ( I ‘if(𝑘 ∈ 𝐴, 𝐶, 0)) = 0)
36	20, 35	sylan9eq 2878	. . . . . . . . 9 ⊢ ((𝑘 ∈ (ℤ≥‘𝑀) ∧ ¬ 𝑘 ∈ 𝐴) → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑘) = 0)
37		iffalse 4478	. . . . . . . . . 10 ⊢ (¬ 𝑘 ∈ 𝐴 → if(𝑘 ∈ 𝐴, ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑘), 0) = 0)
38	37	adantl 484	. . . . . . . . 9 ⊢ ((𝑘 ∈ (ℤ≥‘𝑀) ∧ ¬ 𝑘 ∈ 𝐴) → if(𝑘 ∈ 𝐴, ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑘), 0) = 0)
39	36, 38	eqtr4d 2861	. . . . . . . 8 ⊢ ((𝑘 ∈ (ℤ≥‘𝑀) ∧ ¬ 𝑘 ∈ 𝐴) → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑘) = if(𝑘 ∈ 𝐴, ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑘), 0))
40	29, 39	pm2.61dan 811	. . . . . . 7 ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑘) = if(𝑘 ∈ 𝐴, ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑘), 0))
41	7, 13, 18, 40	vtoclgaf 3575	. . . . . 6 ⊢ (𝑚 ∈ (ℤ≥‘𝑀) → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑚) = if(𝑚 ∈ 𝐴, ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑚), 0))
42	41	adantl 484	. . . . 5 ⊢ (((𝜑 ∧ 𝑀 ∈ ℤ) ∧ 𝑚 ∈ (ℤ≥‘𝑀)) → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑚) = if(𝑚 ∈ 𝐴, ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑚), 0))
43		sumss.2	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐶 ∈ ℂ)
44	43	fmpttd 6881	. . . . . . 7 ⊢ (𝜑 → (𝑘 ∈ 𝐴 ↦ 𝐶):𝐴⟶ℂ)
45	44	adantr 483	. . . . . 6 ⊢ ((𝜑 ∧ 𝑀 ∈ ℤ) → (𝑘 ∈ 𝐴 ↦ 𝐶):𝐴⟶ℂ)
46	45	ffvelrnda 6853	. . . . 5 ⊢ (((𝜑 ∧ 𝑀 ∈ ℤ) ∧ 𝑚 ∈ 𝐴) → ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑚) ∈ ℂ)
47	1, 2, 6, 42, 46	zsum 15077	. . . 4 ⊢ ((𝜑 ∧ 𝑀 ∈ ℤ) → Σ𝑚 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑚) = ( ⇝ ‘seq𝑀( + , (𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0)))))
48	4	adantr 483	. . . . 5 ⊢ ((𝜑 ∧ 𝑀 ∈ ℤ) → 𝐵 ⊆ (ℤ≥‘𝑀))
49		nfv 1915	. . . . . . . . 9 ⊢ Ⅎ𝑘𝜑
50		nfv 1915	. . . . . . . . . . 11 ⊢ Ⅎ𝑘 𝑚 ∈ 𝐵
51		nffvmpt1 6683	. . . . . . . . . . 11 ⊢ Ⅎ𝑘((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑚)
52	50, 51, 11	nfif 4498	. . . . . . . . . 10 ⊢ Ⅎ𝑘if(𝑚 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑚), 0)
53	8, 52	nfeq 2993	. . . . . . . . 9 ⊢ Ⅎ𝑘((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑚) = if(𝑚 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑚), 0)
54	49, 53	nfim 1897	. . . . . . . 8 ⊢ Ⅎ𝑘(𝜑 → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑚) = if(𝑚 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑚), 0))
55		eleq1w 2897	. . . . . . . . . . 11 ⊢ (𝑘 = 𝑚 → (𝑘 ∈ 𝐵 ↔ 𝑚 ∈ 𝐵))
56		fveq2 6672	. . . . . . . . . . 11 ⊢ (𝑘 = 𝑚 → ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘) = ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑚))
57	55, 56	ifbieq1d 4492	. . . . . . . . . 10 ⊢ (𝑘 = 𝑚 → if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0) = if(𝑚 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑚), 0))
58	14, 57	eqeq12d 2839	. . . . . . . . 9 ⊢ (𝑘 = 𝑚 → (((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑘) = if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0) ↔ ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑚) = if(𝑚 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑚), 0)))
59	58	imbi2d 343	. . . . . . . 8 ⊢ (𝑘 = 𝑚 → ((𝜑 → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑘) = if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0)) ↔ (𝜑 → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑚) = if(𝑚 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑚), 0))))
60	23	adantll 712	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) ∧ 𝑘 ∈ 𝐴) → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑘) = ( I ‘𝐶))
61	3	adantr 483	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → 𝐴 ⊆ 𝐵)
62	61	sselda 3969	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) ∧ 𝑘 ∈ 𝐴) → 𝑘 ∈ 𝐵)
63		iftrue 4475	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ 𝐵 → if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0) = ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘))
64		eqid 2823	. . . . . . . . . . . . . 14 ⊢ (𝑘 ∈ 𝐵 ↦ 𝐶) = (𝑘 ∈ 𝐵 ↦ 𝐶)
65	64	fvmpt2i 6780	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ 𝐵 → ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘) = ( I ‘𝐶))
66	63, 65	eqtrd 2858	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ 𝐵 → if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0) = ( I ‘𝐶))
67	62, 66	syl 17	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) ∧ 𝑘 ∈ 𝐴) → if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0) = ( I ‘𝐶))
68	60, 67	eqtr4d 2861	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) ∧ 𝑘 ∈ 𝐴) → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑘) = if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0))
69	36	adantll 712	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) ∧ ¬ 𝑘 ∈ 𝐴) → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑘) = 0)
70	66	ad2antrl 726	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ (𝑘 ∈ 𝐵 ∧ ¬ 𝑘 ∈ 𝐴)) → if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0) = ( I ‘𝐶))
71		eldif 3948	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ (𝐵 ∖ 𝐴) ↔ (𝑘 ∈ 𝐵 ∧ ¬ 𝑘 ∈ 𝐴))
72		sumss.3	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝐵 ∖ 𝐴)) → 𝐶 = 0)
73	72	fveq2d 6676	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝐵 ∖ 𝐴)) → ( I ‘𝐶) = ( I ‘0))
74		0cn 10635	. . . . . . . . . . . . . . . . . . 19 ⊢ 0 ∈ ℂ
75		fvi 6742	. . . . . . . . . . . . . . . . . . 19 ⊢ (0 ∈ ℂ → ( I ‘0) = 0)
76	74, 75	ax-mp 5	. . . . . . . . . . . . . . . . . 18 ⊢ ( I ‘0) = 0
77	73, 76	syl6eq 2874	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝐵 ∖ 𝐴)) → ( I ‘𝐶) = 0)
78	71, 77	sylan2br 596	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ (𝑘 ∈ 𝐵 ∧ ¬ 𝑘 ∈ 𝐴)) → ( I ‘𝐶) = 0)
79	70, 78	eqtrd 2858	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑘 ∈ 𝐵 ∧ ¬ 𝑘 ∈ 𝐴)) → if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0) = 0)
80	79	expr 459	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐵) → (¬ 𝑘 ∈ 𝐴 → if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0) = 0))
81		iffalse 4478	. . . . . . . . . . . . . . . 16 ⊢ (¬ 𝑘 ∈ 𝐵 → if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0) = 0)
82	81	adantl 484	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ ¬ 𝑘 ∈ 𝐵) → if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0) = 0)
83	82	a1d 25	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ ¬ 𝑘 ∈ 𝐵) → (¬ 𝑘 ∈ 𝐴 → if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0) = 0))
84	80, 83	pm2.61dan 811	. . . . . . . . . . . . 13 ⊢ (𝜑 → (¬ 𝑘 ∈ 𝐴 → if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0) = 0))
85	84	adantr 483	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → (¬ 𝑘 ∈ 𝐴 → if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0) = 0))
86	85	imp 409	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) ∧ ¬ 𝑘 ∈ 𝐴) → if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0) = 0)
87	69, 86	eqtr4d 2861	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) ∧ ¬ 𝑘 ∈ 𝐴) → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑘) = if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0))
88	68, 87	pm2.61dan 811	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑘) = if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0))
89	88	expcom 416	. . . . . . . 8 ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → (𝜑 → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑘) = if(𝑘 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑘), 0)))
90	7, 54, 59, 89	vtoclgaf 3575	. . . . . . 7 ⊢ (𝑚 ∈ (ℤ≥‘𝑀) → (𝜑 → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑚) = if(𝑚 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑚), 0)))
91	90	impcom 410	. . . . . 6 ⊢ ((𝜑 ∧ 𝑚 ∈ (ℤ≥‘𝑀)) → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑚) = if(𝑚 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑚), 0))
92	91	adantlr 713	. . . . 5 ⊢ (((𝜑 ∧ 𝑀 ∈ ℤ) ∧ 𝑚 ∈ (ℤ≥‘𝑀)) → ((𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0))‘𝑚) = if(𝑚 ∈ 𝐵, ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑚), 0))
93	43	ex 415	. . . . . . . . . 10 ⊢ (𝜑 → (𝑘 ∈ 𝐴 → 𝐶 ∈ ℂ))
94	93	adantr 483	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐵) → (𝑘 ∈ 𝐴 → 𝐶 ∈ ℂ))
95	72, 74	eqeltrdi 2923	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝐵 ∖ 𝐴)) → 𝐶 ∈ ℂ)
96	71, 95	sylan2br 596	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑘 ∈ 𝐵 ∧ ¬ 𝑘 ∈ 𝐴)) → 𝐶 ∈ ℂ)
97	96	expr 459	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐵) → (¬ 𝑘 ∈ 𝐴 → 𝐶 ∈ ℂ))
98	94, 97	pm2.61d 181	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐵) → 𝐶 ∈ ℂ)
99	98	fmpttd 6881	. . . . . . 7 ⊢ (𝜑 → (𝑘 ∈ 𝐵 ↦ 𝐶):𝐵⟶ℂ)
100	99	adantr 483	. . . . . 6 ⊢ ((𝜑 ∧ 𝑀 ∈ ℤ) → (𝑘 ∈ 𝐵 ↦ 𝐶):𝐵⟶ℂ)
101	100	ffvelrnda 6853	. . . . 5 ⊢ (((𝜑 ∧ 𝑀 ∈ ℤ) ∧ 𝑚 ∈ 𝐵) → ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑚) ∈ ℂ)
102	1, 2, 48, 92, 101	zsum 15077	. . . 4 ⊢ ((𝜑 ∧ 𝑀 ∈ ℤ) → Σ𝑚 ∈ 𝐵 ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑚) = ( ⇝ ‘seq𝑀( + , (𝑘 ∈ (ℤ≥‘𝑀) ↦ if(𝑘 ∈ 𝐴, 𝐶, 0)))))
103	47, 102	eqtr4d 2861	. . 3 ⊢ ((𝜑 ∧ 𝑀 ∈ ℤ) → Σ𝑚 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑚) = Σ𝑚 ∈ 𝐵 ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑚))
104		sumfc 15068	. . 3 ⊢ Σ𝑚 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐶)‘𝑚) = Σ𝑘 ∈ 𝐴 𝐶
105		sumfc 15068	. . 3 ⊢ Σ𝑚 ∈ 𝐵 ((𝑘 ∈ 𝐵 ↦ 𝐶)‘𝑚) = Σ𝑘 ∈ 𝐵 𝐶
106	103, 104, 105	3eqtr3g 2881	. 2 ⊢ ((𝜑 ∧ 𝑀 ∈ ℤ) → Σ𝑘 ∈ 𝐴 𝐶 = Σ𝑘 ∈ 𝐵 𝐶)
107	3	adantr 483	. . . . . 6 ⊢ ((𝜑 ∧ ¬ 𝑀 ∈ ℤ) → 𝐴 ⊆ 𝐵)
108		uzf 12249	. . . . . . . . . . . 12 ⊢ ℤ≥:ℤ⟶𝒫 ℤ
109	108	fdmi 6526	. . . . . . . . . . 11 ⊢ dom ℤ≥ = ℤ
110	109	eleq2i 2906	. . . . . . . . . 10 ⊢ (𝑀 ∈ dom ℤ≥ ↔ 𝑀 ∈ ℤ)
111		ndmfv 6702	. . . . . . . . . 10 ⊢ (¬ 𝑀 ∈ dom ℤ≥ → (ℤ≥‘𝑀) = ∅)
112	110, 111	sylnbir 333	. . . . . . . . 9 ⊢ (¬ 𝑀 ∈ ℤ → (ℤ≥‘𝑀) = ∅)
113	112	sseq2d 4001	. . . . . . . 8 ⊢ (¬ 𝑀 ∈ ℤ → (𝐵 ⊆ (ℤ≥‘𝑀) ↔ 𝐵 ⊆ ∅))
114	4, 113	syl5ib 246	. . . . . . 7 ⊢ (¬ 𝑀 ∈ ℤ → (𝜑 → 𝐵 ⊆ ∅))
115	114	impcom 410	. . . . . 6 ⊢ ((𝜑 ∧ ¬ 𝑀 ∈ ℤ) → 𝐵 ⊆ ∅)
116	107, 115	sstrd 3979	. . . . 5 ⊢ ((𝜑 ∧ ¬ 𝑀 ∈ ℤ) → 𝐴 ⊆ ∅)
117		ss0 4354	. . . . 5 ⊢ (𝐴 ⊆ ∅ → 𝐴 = ∅)
118	116, 117	syl 17	. . . 4 ⊢ ((𝜑 ∧ ¬ 𝑀 ∈ ℤ) → 𝐴 = ∅)
119		ss0 4354	. . . . 5 ⊢ (𝐵 ⊆ ∅ → 𝐵 = ∅)
120	115, 119	syl 17	. . . 4 ⊢ ((𝜑 ∧ ¬ 𝑀 ∈ ℤ) → 𝐵 = ∅)
121	118, 120	eqtr4d 2861	. . 3 ⊢ ((𝜑 ∧ ¬ 𝑀 ∈ ℤ) → 𝐴 = 𝐵)
122	121	sumeq1d 15060	. 2 ⊢ ((𝜑 ∧ ¬ 𝑀 ∈ ℤ) → Σ𝑘 ∈ 𝐴 𝐶 = Σ𝑘 ∈ 𝐵 𝐶)
123	106, 122	pm2.61dan 811	1 ⊢ (𝜑 → Σ𝑘 ∈ 𝐴 𝐶 = Σ𝑘 ∈ 𝐵 𝐶)

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 398   = wceq 1537   ∈ wcel 2114   ∖ cdif 3935   ⊆ wss 3938  ∅c0 4293  ifcif 4469  𝒫 cpw 4541   ↦ cmpt 5148   I cid 5461  dom cdm 5557  ⟶wf 6353  ‘cfv 6357  ℂcc 10537  0cc0 10539   + caddc 10542  ℤcz 11984  ℤ_≥cuz 12246  seqcseq 13372   ⇝ cli 14843  Σcsu 15044

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-rep 5192  ax-sep 5205  ax-nul 5212  ax-pow 5268  ax-pr 5332  ax-un 7463  ax-inf2 9106  ax-cnex 10595  ax-resscn 10596  ax-1cn 10597  ax-icn 10598  ax-addcl 10599  ax-addrcl 10600  ax-mulcl 10601  ax-mulrcl 10602  ax-mulcom 10603  ax-addass 10604  ax-mulass 10605  ax-distr 10606  ax-i2m1 10607  ax-1ne0 10608  ax-1rid 10609  ax-rnegex 10610  ax-rrecex 10611  ax-cnre 10612  ax-pre-lttri 10613  ax-pre-lttrn 10614  ax-pre-ltadd 10615  ax-pre-mulgt0 10616

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1540  df-fal 1550  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ne 3019  df-nel 3126  df-ral 3145  df-rex 3146  df-reu 3147  df-rmo 3148  df-rab 3149  df-v 3498  df-sbc 3775  df-csb 3886  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-pss 3956  df-nul 4294  df-if 4470  df-pw 4543  df-sn 4570  df-pr 4572  df-tp 4574  df-op 4576  df-uni 4841  df-int 4879  df-iun 4923  df-br 5069  df-opab 5131  df-mpt 5149  df-tr 5175  df-id 5462  df-eprel 5467  df-po 5476  df-so 5477  df-fr 5516  df-se 5517  df-we 5518  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-rn 5568  df-res 5569  df-ima 5570  df-pred 6150  df-ord 6196  df-on 6197  df-lim 6198  df-suc 6199  df-iota 6316  df-fun 6359  df-fn 6360  df-f 6361  df-f1 6362  df-fo 6363  df-f1o 6364  df-fv 6365  df-isom 6366  df-riota 7116  df-ov 7161  df-oprab 7162  df-mpo 7163  df-om 7583  df-1st 7691  df-2nd 7692  df-wrecs 7949  df-recs 8010  df-rdg 8048  df-1o 8104  df-oadd 8108  df-er 8291  df-en 8512  df-dom 8513  df-sdom 8514  df-fin 8515  df-oi 8976  df-card 9370  df-pnf 10679  df-mnf 10680  df-xr 10681  df-ltxr 10682  df-le 10683  df-sub 10874  df-neg 10875  df-div 11300  df-nn 11641  df-2 11703  df-n0 11901  df-z 11985  df-uz 12247  df-rp 12393  df-fz 12896  df-fzo 13037  df-seq 13373  df-exp 13433  df-hash 13694  df-cj 14460  df-re 14461  df-im 14462  df-sqrt 14596  df-abs 14597  df-clim 14847  df-sum 15045

This theorem is referenced by:  fsumss  15084  sumss2  15085  binomlem  15186  eulerpartlemsv2  31618  eulerpartlemsv3  31621  eulerpartlemv  31624  eulerpartlemb  31628