Theorem fsumrelem 12182

Description: Lemma for fsumre 12183, fsumim 12184, and fsumcj 12185. (Contributed by Mario Carneiro, 25-Jul-2014.) (Revised by Mario Carneiro, 27-Dec-2014.)

Hypotheses

Ref	Expression
fsumre.1	⊢ (𝜑 → 𝐴 ∈ Fin)
fsumre.2	⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ ℂ)
fsumrelem.3	⊢ 𝐹:ℂ⟶ℂ
fsumrelem.4	⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (𝐹‘(𝑥 + 𝑦)) = ((𝐹‘𝑥) + (𝐹‘𝑦)))

Assertion

Ref	Expression
fsumrelem	⊢ (𝜑 → (𝐹‘Σ𝑘 ∈ 𝐴 𝐵) = Σ𝑘 ∈ 𝐴 (𝐹‘𝐵))

Distinct variable groups:   𝑥,𝑘,𝑦,𝐴   𝑥,𝐵,𝑦   𝑘,𝐹,𝑥,𝑦   𝜑,𝑘,𝑥,𝑦

Allowed substitution hint:   𝐵(𝑘)

Proof of Theorem fsumrelem

Dummy variables 𝑢 𝑣 𝑤 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		sumeq1 12065	. . . 4 ⊢ (𝑤 = ∅ → Σ𝑘 ∈ 𝑤 𝐵 = Σ𝑘 ∈ ∅ 𝐵)
2	1	fveq2d 5679	. . 3 ⊢ (𝑤 = ∅ → (𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = (𝐹‘Σ𝑘 ∈ ∅ 𝐵))
3		sumeq1 12065	. . 3 ⊢ (𝑤 = ∅ → Σ𝑘 ∈ 𝑤 (𝐹‘𝐵) = Σ𝑘 ∈ ∅ (𝐹‘𝐵))
4	2, 3	eqeq12d 2249	. 2 ⊢ (𝑤 = ∅ → ((𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = Σ𝑘 ∈ 𝑤 (𝐹‘𝐵) ↔ (𝐹‘Σ𝑘 ∈ ∅ 𝐵) = Σ𝑘 ∈ ∅ (𝐹‘𝐵)))
5		sumeq1 12065	. . . 4 ⊢ (𝑤 = 𝑢 → Σ𝑘 ∈ 𝑤 𝐵 = Σ𝑘 ∈ 𝑢 𝐵)
6	5	fveq2d 5679	. . 3 ⊢ (𝑤 = 𝑢 → (𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = (𝐹‘Σ𝑘 ∈ 𝑢 𝐵))
7		sumeq1 12065	. . 3 ⊢ (𝑤 = 𝑢 → Σ𝑘 ∈ 𝑤 (𝐹‘𝐵) = Σ𝑘 ∈ 𝑢 (𝐹‘𝐵))
8	6, 7	eqeq12d 2249	. 2 ⊢ (𝑤 = 𝑢 → ((𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = Σ𝑘 ∈ 𝑤 (𝐹‘𝐵) ↔ (𝐹‘Σ𝑘 ∈ 𝑢 𝐵) = Σ𝑘 ∈ 𝑢 (𝐹‘𝐵)))
9		sumeq1 12065	. . . 4 ⊢ (𝑤 = (𝑢 ∪ {𝑣}) → Σ𝑘 ∈ 𝑤 𝐵 = Σ𝑘 ∈ (𝑢 ∪ {𝑣})𝐵)
10	9	fveq2d 5679	. . 3 ⊢ (𝑤 = (𝑢 ∪ {𝑣}) → (𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = (𝐹‘Σ𝑘 ∈ (𝑢 ∪ {𝑣})𝐵))
11		sumeq1 12065	. . 3 ⊢ (𝑤 = (𝑢 ∪ {𝑣}) → Σ𝑘 ∈ 𝑤 (𝐹‘𝐵) = Σ𝑘 ∈ (𝑢 ∪ {𝑣})(𝐹‘𝐵))
12	10, 11	eqeq12d 2249	. 2 ⊢ (𝑤 = (𝑢 ∪ {𝑣}) → ((𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = Σ𝑘 ∈ 𝑤 (𝐹‘𝐵) ↔ (𝐹‘Σ𝑘 ∈ (𝑢 ∪ {𝑣})𝐵) = Σ𝑘 ∈ (𝑢 ∪ {𝑣})(𝐹‘𝐵)))
13		sumeq1 12065	. . . 4 ⊢ (𝑤 = 𝐴 → Σ𝑘 ∈ 𝑤 𝐵 = Σ𝑘 ∈ 𝐴 𝐵)
14	13	fveq2d 5679	. . 3 ⊢ (𝑤 = 𝐴 → (𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = (𝐹‘Σ𝑘 ∈ 𝐴 𝐵))
15		sumeq1 12065	. . 3 ⊢ (𝑤 = 𝐴 → Σ𝑘 ∈ 𝑤 (𝐹‘𝐵) = Σ𝑘 ∈ 𝐴 (𝐹‘𝐵))
16	14, 15	eqeq12d 2249	. 2 ⊢ (𝑤 = 𝐴 → ((𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = Σ𝑘 ∈ 𝑤 (𝐹‘𝐵) ↔ (𝐹‘Σ𝑘 ∈ 𝐴 𝐵) = Σ𝑘 ∈ 𝐴 (𝐹‘𝐵)))
17		0cn 8282	. . . . . . . 8 ⊢ 0 ∈ ℂ
18		fsumrelem.3	. . . . . . . . 9 ⊢ 𝐹:ℂ⟶ℂ
19	18	ffvelcdmi 5816	. . . . . . . 8 ⊢ (0 ∈ ℂ → (𝐹‘0) ∈ ℂ)
20	17, 19	ax-mp 5	. . . . . . 7 ⊢ (𝐹‘0) ∈ ℂ
21	20	addridi 8431	. . . . . 6 ⊢ ((𝐹‘0) + 0) = (𝐹‘0)
22		fvoveq1 6081	. . . . . . . . 9 ⊢ (𝑥 = 0 → (𝐹‘(𝑥 + 𝑦)) = (𝐹‘(0 + 𝑦)))
23		fveq2 5675	. . . . . . . . . 10 ⊢ (𝑥 = 0 → (𝐹‘𝑥) = (𝐹‘0))
24	23	oveq1d 6073	. . . . . . . . 9 ⊢ (𝑥 = 0 → ((𝐹‘𝑥) + (𝐹‘𝑦)) = ((𝐹‘0) + (𝐹‘𝑦)))
25	22, 24	eqeq12d 2249	. . . . . . . 8 ⊢ (𝑥 = 0 → ((𝐹‘(𝑥 + 𝑦)) = ((𝐹‘𝑥) + (𝐹‘𝑦)) ↔ (𝐹‘(0 + 𝑦)) = ((𝐹‘0) + (𝐹‘𝑦))))
26		oveq2 6066	. . . . . . . . . . 11 ⊢ (𝑦 = 0 → (0 + 𝑦) = (0 + 0))
27		00id 8430	. . . . . . . . . . 11 ⊢ (0 + 0) = 0
28	26, 27	eqtrdi 2283	. . . . . . . . . 10 ⊢ (𝑦 = 0 → (0 + 𝑦) = 0)
29	28	fveq2d 5679	. . . . . . . . 9 ⊢ (𝑦 = 0 → (𝐹‘(0 + 𝑦)) = (𝐹‘0))
30		fveq2 5675	. . . . . . . . . 10 ⊢ (𝑦 = 0 → (𝐹‘𝑦) = (𝐹‘0))
31	30	oveq2d 6074	. . . . . . . . 9 ⊢ (𝑦 = 0 → ((𝐹‘0) + (𝐹‘𝑦)) = ((𝐹‘0) + (𝐹‘0)))
32	29, 31	eqeq12d 2249	. . . . . . . 8 ⊢ (𝑦 = 0 → ((𝐹‘(0 + 𝑦)) = ((𝐹‘0) + (𝐹‘𝑦)) ↔ (𝐹‘0) = ((𝐹‘0) + (𝐹‘0))))
33		fsumrelem.4	. . . . . . . 8 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (𝐹‘(𝑥 + 𝑦)) = ((𝐹‘𝑥) + (𝐹‘𝑦)))
34	25, 32, 33	vtocl2ga 2885	. . . . . . 7 ⊢ ((0 ∈ ℂ ∧ 0 ∈ ℂ) → (𝐹‘0) = ((𝐹‘0) + (𝐹‘0)))
35	17, 17, 34	mp2an 426	. . . . . 6 ⊢ (𝐹‘0) = ((𝐹‘0) + (𝐹‘0))
36	21, 35	eqtr2i 2256	. . . . 5 ⊢ ((𝐹‘0) + (𝐹‘0)) = ((𝐹‘0) + 0)
37	20, 20, 17	addcani 8471	. . . . 5 ⊢ (((𝐹‘0) + (𝐹‘0)) = ((𝐹‘0) + 0) ↔ (𝐹‘0) = 0)
38	36, 37	mpbi 145	. . . 4 ⊢ (𝐹‘0) = 0
39		sum0 12099	. . . . 5 ⊢ Σ𝑘 ∈ ∅ 𝐵 = 0
40	39	fveq2i 5678	. . . 4 ⊢ (𝐹‘Σ𝑘 ∈ ∅ 𝐵) = (𝐹‘0)
41		sum0 12099	. . . 4 ⊢ Σ𝑘 ∈ ∅ (𝐹‘𝐵) = 0
42	38, 40, 41	3eqtr4i 2265	. . 3 ⊢ (𝐹‘Σ𝑘 ∈ ∅ 𝐵) = Σ𝑘 ∈ ∅ (𝐹‘𝐵)
43	42	a1i 9	. 2 ⊢ (𝜑 → (𝐹‘Σ𝑘 ∈ ∅ 𝐵) = Σ𝑘 ∈ ∅ (𝐹‘𝐵))
44		nfv 1577	. . . . . . . 8 ⊢ Ⅎ𝑘((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢)))
45		nfcsb1v 3174	. . . . . . . 8 ⊢ Ⅎ𝑘⦋𝑣 / 𝑘⦌𝐵
46		simplr 529	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → 𝑢 ∈ Fin)
47		vex 2818	. . . . . . . . 9 ⊢ 𝑣 ∈ V
48	47	a1i 9	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → 𝑣 ∈ V)
49		simprr 533	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → 𝑣 ∈ (𝐴 ∖ 𝑢))
50	49	eldifbd 3226	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → ¬ 𝑣 ∈ 𝑢)
51		simplll 535	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ 𝑘 ∈ 𝑢) → 𝜑)
52		simprl 531	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → 𝑢 ⊆ 𝐴)
53	52	sselda 3242	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ 𝑘 ∈ 𝑢) → 𝑘 ∈ 𝐴)
54		fsumre.2	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ ℂ)
55	51, 53, 54	syl2anc 411	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ 𝑘 ∈ 𝑢) → 𝐵 ∈ ℂ)
56		csbeq1a 3150	. . . . . . . 8 ⊢ (𝑘 = 𝑣 → 𝐵 = ⦋𝑣 / 𝑘⦌𝐵)
57	49	eldifad 3225	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → 𝑣 ∈ 𝐴)
58	54	ralrimiva 2617	. . . . . . . . . 10 ⊢ (𝜑 → ∀𝑘 ∈ 𝐴 𝐵 ∈ ℂ)
59	58	ad2antrr 488	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → ∀𝑘 ∈ 𝐴 𝐵 ∈ ℂ)
60	45	nfel1 2397	. . . . . . . . . 10 ⊢ Ⅎ𝑘⦋𝑣 / 𝑘⦌𝐵 ∈ ℂ
61	56	eleq1d 2303	. . . . . . . . . 10 ⊢ (𝑘 = 𝑣 → (𝐵 ∈ ℂ ↔ ⦋𝑣 / 𝑘⦌𝐵 ∈ ℂ))
62	60, 61	rspc 2917	. . . . . . . . 9 ⊢ (𝑣 ∈ 𝐴 → (∀𝑘 ∈ 𝐴 𝐵 ∈ ℂ → ⦋𝑣 / 𝑘⦌𝐵 ∈ ℂ))
63	57, 59, 62	sylc 62	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → ⦋𝑣 / 𝑘⦌𝐵 ∈ ℂ)
64	44, 45, 46, 48, 50, 55, 56, 63	fsumsplitsn 12121	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → Σ𝑘 ∈ (𝑢 ∪ {𝑣})𝐵 = (Σ𝑘 ∈ 𝑢 𝐵 + ⦋𝑣 / 𝑘⦌𝐵))
65	64	adantr 276	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ (𝐹‘Σ𝑘 ∈ 𝑢 𝐵) = Σ𝑘 ∈ 𝑢 (𝐹‘𝐵)) → Σ𝑘 ∈ (𝑢 ∪ {𝑣})𝐵 = (Σ𝑘 ∈ 𝑢 𝐵 + ⦋𝑣 / 𝑘⦌𝐵))
66	65	fveq2d 5679	. . . . 5 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ (𝐹‘Σ𝑘 ∈ 𝑢 𝐵) = Σ𝑘 ∈ 𝑢 (𝐹‘𝐵)) → (𝐹‘Σ𝑘 ∈ (𝑢 ∪ {𝑣})𝐵) = (𝐹‘(Σ𝑘 ∈ 𝑢 𝐵 + ⦋𝑣 / 𝑘⦌𝐵)))
67	46, 55	fsumcl 12111	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → Σ𝑘 ∈ 𝑢 𝐵 ∈ ℂ)
68	67	adantr 276	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ (𝐹‘Σ𝑘 ∈ 𝑢 𝐵) = Σ𝑘 ∈ 𝑢 (𝐹‘𝐵)) → Σ𝑘 ∈ 𝑢 𝐵 ∈ ℂ)
69	63	adantr 276	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ (𝐹‘Σ𝑘 ∈ 𝑢 𝐵) = Σ𝑘 ∈ 𝑢 (𝐹‘𝐵)) → ⦋𝑣 / 𝑘⦌𝐵 ∈ ℂ)
70		fvoveq1 6081	. . . . . . . 8 ⊢ (𝑥 = Σ𝑘 ∈ 𝑢 𝐵 → (𝐹‘(𝑥 + 𝑦)) = (𝐹‘(Σ𝑘 ∈ 𝑢 𝐵 + 𝑦)))
71		fveq2 5675	. . . . . . . . 9 ⊢ (𝑥 = Σ𝑘 ∈ 𝑢 𝐵 → (𝐹‘𝑥) = (𝐹‘Σ𝑘 ∈ 𝑢 𝐵))
72	71	oveq1d 6073	. . . . . . . 8 ⊢ (𝑥 = Σ𝑘 ∈ 𝑢 𝐵 → ((𝐹‘𝑥) + (𝐹‘𝑦)) = ((𝐹‘Σ𝑘 ∈ 𝑢 𝐵) + (𝐹‘𝑦)))
73	70, 72	eqeq12d 2249	. . . . . . 7 ⊢ (𝑥 = Σ𝑘 ∈ 𝑢 𝐵 → ((𝐹‘(𝑥 + 𝑦)) = ((𝐹‘𝑥) + (𝐹‘𝑦)) ↔ (𝐹‘(Σ𝑘 ∈ 𝑢 𝐵 + 𝑦)) = ((𝐹‘Σ𝑘 ∈ 𝑢 𝐵) + (𝐹‘𝑦))))
74		oveq2 6066	. . . . . . . . 9 ⊢ (𝑦 = ⦋𝑣 / 𝑘⦌𝐵 → (Σ𝑘 ∈ 𝑢 𝐵 + 𝑦) = (Σ𝑘 ∈ 𝑢 𝐵 + ⦋𝑣 / 𝑘⦌𝐵))
75	74	fveq2d 5679	. . . . . . . 8 ⊢ (𝑦 = ⦋𝑣 / 𝑘⦌𝐵 → (𝐹‘(Σ𝑘 ∈ 𝑢 𝐵 + 𝑦)) = (𝐹‘(Σ𝑘 ∈ 𝑢 𝐵 + ⦋𝑣 / 𝑘⦌𝐵)))
76		fveq2 5675	. . . . . . . . 9 ⊢ (𝑦 = ⦋𝑣 / 𝑘⦌𝐵 → (𝐹‘𝑦) = (𝐹‘⦋𝑣 / 𝑘⦌𝐵))
77	76	oveq2d 6074	. . . . . . . 8 ⊢ (𝑦 = ⦋𝑣 / 𝑘⦌𝐵 → ((𝐹‘Σ𝑘 ∈ 𝑢 𝐵) + (𝐹‘𝑦)) = ((𝐹‘Σ𝑘 ∈ 𝑢 𝐵) + (𝐹‘⦋𝑣 / 𝑘⦌𝐵)))
78	75, 77	eqeq12d 2249	. . . . . . 7 ⊢ (𝑦 = ⦋𝑣 / 𝑘⦌𝐵 → ((𝐹‘(Σ𝑘 ∈ 𝑢 𝐵 + 𝑦)) = ((𝐹‘Σ𝑘 ∈ 𝑢 𝐵) + (𝐹‘𝑦)) ↔ (𝐹‘(Σ𝑘 ∈ 𝑢 𝐵 + ⦋𝑣 / 𝑘⦌𝐵)) = ((𝐹‘Σ𝑘 ∈ 𝑢 𝐵) + (𝐹‘⦋𝑣 / 𝑘⦌𝐵))))
79	73, 78, 33	vtocl2ga 2885	. . . . . 6 ⊢ ((Σ𝑘 ∈ 𝑢 𝐵 ∈ ℂ ∧ ⦋𝑣 / 𝑘⦌𝐵 ∈ ℂ) → (𝐹‘(Σ𝑘 ∈ 𝑢 𝐵 + ⦋𝑣 / 𝑘⦌𝐵)) = ((𝐹‘Σ𝑘 ∈ 𝑢 𝐵) + (𝐹‘⦋𝑣 / 𝑘⦌𝐵)))
80	68, 69, 79	syl2anc 411	. . . . 5 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ (𝐹‘Σ𝑘 ∈ 𝑢 𝐵) = Σ𝑘 ∈ 𝑢 (𝐹‘𝐵)) → (𝐹‘(Σ𝑘 ∈ 𝑢 𝐵 + ⦋𝑣 / 𝑘⦌𝐵)) = ((𝐹‘Σ𝑘 ∈ 𝑢 𝐵) + (𝐹‘⦋𝑣 / 𝑘⦌𝐵)))
81		simpr 110	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ (𝐹‘Σ𝑘 ∈ 𝑢 𝐵) = Σ𝑘 ∈ 𝑢 (𝐹‘𝐵)) → (𝐹‘Σ𝑘 ∈ 𝑢 𝐵) = Σ𝑘 ∈ 𝑢 (𝐹‘𝐵))
82	81	oveq1d 6073	. . . . 5 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ (𝐹‘Σ𝑘 ∈ 𝑢 𝐵) = Σ𝑘 ∈ 𝑢 (𝐹‘𝐵)) → ((𝐹‘Σ𝑘 ∈ 𝑢 𝐵) + (𝐹‘⦋𝑣 / 𝑘⦌𝐵)) = (Σ𝑘 ∈ 𝑢 (𝐹‘𝐵) + (𝐹‘⦋𝑣 / 𝑘⦌𝐵)))
83	66, 80, 82	3eqtrd 2271	. . . 4 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ (𝐹‘Σ𝑘 ∈ 𝑢 𝐵) = Σ𝑘 ∈ 𝑢 (𝐹‘𝐵)) → (𝐹‘Σ𝑘 ∈ (𝑢 ∪ {𝑣})𝐵) = (Σ𝑘 ∈ 𝑢 (𝐹‘𝐵) + (𝐹‘⦋𝑣 / 𝑘⦌𝐵)))
84		nfcv 2386	. . . . . . 7 ⊢ Ⅎ𝑘𝐹
85	84, 45	nffv 5685	. . . . . 6 ⊢ Ⅎ𝑘(𝐹‘⦋𝑣 / 𝑘⦌𝐵)
86	18	a1i 9	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ 𝑘 ∈ 𝑢) → 𝐹:ℂ⟶ℂ)
87	86, 55	ffvelcdmd 5818	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ 𝑘 ∈ 𝑢) → (𝐹‘𝐵) ∈ ℂ)
88	56	fveq2d 5679	. . . . . 6 ⊢ (𝑘 = 𝑣 → (𝐹‘𝐵) = (𝐹‘⦋𝑣 / 𝑘⦌𝐵))
89	18	a1i 9	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → 𝐹:ℂ⟶ℂ)
90	89, 63	ffvelcdmd 5818	. . . . . 6 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → (𝐹‘⦋𝑣 / 𝑘⦌𝐵) ∈ ℂ)
91	44, 85, 46, 48, 50, 87, 88, 90	fsumsplitsn 12121	. . . . 5 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → Σ𝑘 ∈ (𝑢 ∪ {𝑣})(𝐹‘𝐵) = (Σ𝑘 ∈ 𝑢 (𝐹‘𝐵) + (𝐹‘⦋𝑣 / 𝑘⦌𝐵)))
92	91	adantr 276	. . . 4 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ (𝐹‘Σ𝑘 ∈ 𝑢 𝐵) = Σ𝑘 ∈ 𝑢 (𝐹‘𝐵)) → Σ𝑘 ∈ (𝑢 ∪ {𝑣})(𝐹‘𝐵) = (Σ𝑘 ∈ 𝑢 (𝐹‘𝐵) + (𝐹‘⦋𝑣 / 𝑘⦌𝐵)))
93	83, 92	eqtr4d 2270	. . 3 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ (𝐹‘Σ𝑘 ∈ 𝑢 𝐵) = Σ𝑘 ∈ 𝑢 (𝐹‘𝐵)) → (𝐹‘Σ𝑘 ∈ (𝑢 ∪ {𝑣})𝐵) = Σ𝑘 ∈ (𝑢 ∪ {𝑣})(𝐹‘𝐵))
94	93	ex 115	. 2 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → ((𝐹‘Σ𝑘 ∈ 𝑢 𝐵) = Σ𝑘 ∈ 𝑢 (𝐹‘𝐵) → (𝐹‘Σ𝑘 ∈ (𝑢 ∪ {𝑣})𝐵) = Σ𝑘 ∈ (𝑢 ∪ {𝑣})(𝐹‘𝐵)))
95		fsumre.1	. 2 ⊢ (𝜑 → 𝐴 ∈ Fin)
96	4, 8, 12, 16, 43, 94, 95	findcard2sd 7162	1 ⊢ (𝜑 → (𝐹‘Σ𝑘 ∈ 𝐴 𝐵) = Σ𝑘 ∈ 𝐴 (𝐹‘𝐵))

Syntax hints:   → wi 4   ∧ wa 104   = wceq 1398   ∈ wcel 2205  ∀wral 2522  Vcvv 2815  ⦋csb 3141   ∖ cdif 3211   ∪ cun 3212   ⊆ wss 3214  ∅c0 3512  {csn 3694  ⟶wf 5353  ‘cfv 5357  (class class class)co 6058  Fincfn 6988  ℂcc 8141  0cc0 8143   + caddc 8146  Σcsu 12063

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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2207  ax-14 2208  ax-ext 2216  ax-coll 4230  ax-sep 4233  ax-nul 4241  ax-pow 4292  ax-pr 4327  ax-un 4559  ax-setind 4664  ax-iinf 4715  ax-cnex 8234  ax-resscn 8235  ax-1cn 8236  ax-1re 8237  ax-icn 8238  ax-addcl 8239  ax-addrcl 8240  ax-mulcl 8241  ax-mulrcl 8242  ax-addcom 8243  ax-mulcom 8244  ax-addass 8245  ax-mulass 8246  ax-distr 8247  ax-i2m1 8248  ax-0lt1 8249  ax-1rid 8250  ax-0id 8251  ax-rnegex 8252  ax-precex 8253  ax-cnre 8254  ax-pre-ltirr 8255  ax-pre-ltwlin 8256  ax-pre-lttrn 8257  ax-pre-apti 8258  ax-pre-ltadd 8259  ax-pre-mulgt0 8260  ax-pre-mulext 8261  ax-arch 8262  ax-caucvg 8263

This theorem depends on definitions:  df-bi 117  df-dc 843  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-nel 2510  df-ral 2527  df-rex 2528  df-reu 2529  df-rmo 2530  df-rab 2531  df-v 2817  df-sbc 3046  df-csb 3142  df-dif 3216  df-un 3218  df-in 3220  df-ss 3227  df-nul 3513  df-if 3625  df-pw 3676  df-sn 3700  df-pr 3701  df-op 3703  df-uni 3920  df-int 3955  df-iun 3998  df-br 4115  df-opab 4177  df-mpt 4178  df-tr 4214  df-id 4419  df-po 4422  df-iso 4423  df-iord 4492  df-on 4494  df-ilim 4495  df-suc 4497  df-iom 4718  df-xp 4760  df-rel 4761  df-cnv 4762  df-co 4763  df-dm 4764  df-rn 4765  df-res 4766  df-ima 4767  df-iota 5317  df-fun 5359  df-fn 5360  df-f 5361  df-f1 5362  df-fo 5363  df-f1o 5364  df-fv 5365  df-isom 5366  df-riota 6011  df-ov 6061  df-oprab 6062  df-mpo 6063  df-1st 6347  df-2nd 6348  df-recs 6549  df-irdg 6614  df-frec 6635  df-1o 6660  df-oadd 6664  df-er 6780  df-en 6989  df-dom 6990  df-fin 6991  df-pnf 8326  df-mnf 8327  df-xr 8328  df-ltxr 8329  df-le 8330  df-sub 8462  df-neg 8463  df-reap 8866  df-ap 8873  df-div 8964  df-inn 9255  df-2 9313  df-3 9314  df-4 9315  df-n0 9514  df-z 9595  df-uz 9872  df-q 9970  df-rp 10005  df-fz 10362  df-fzo 10499  df-seqfrec 10834  df-exp 10925  df-ihash 11164  df-cj 11552  df-re 11553  df-im 11554  df-rsqrt 11708  df-abs 11709  df-clim 11989  df-sumdc 12064

This theorem is referenced by:  fsumre  12183  fsumim  12184  fsumcj  12185