Theorem fsumrelem 12161

Description: Lemma for fsumre 12162, fsumim 12163, and fsumcj 12164. (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 12044	. . . 4 ⊢ (𝑤 = ∅ → Σ𝑘 ∈ 𝑤 𝐵 = Σ𝑘 ∈ ∅ 𝐵)
2	1	fveq2d 5676	. . 3 ⊢ (𝑤 = ∅ → (𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = (𝐹‘Σ𝑘 ∈ ∅ 𝐵))
3		sumeq1 12044	. . 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 12044	. . . 4 ⊢ (𝑤 = 𝑢 → Σ𝑘 ∈ 𝑤 𝐵 = Σ𝑘 ∈ 𝑢 𝐵)
6	5	fveq2d 5676	. . 3 ⊢ (𝑤 = 𝑢 → (𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = (𝐹‘Σ𝑘 ∈ 𝑢 𝐵))
7		sumeq1 12044	. . 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 12044	. . . 4 ⊢ (𝑤 = (𝑢 ∪ {𝑣}) → Σ𝑘 ∈ 𝑤 𝐵 = Σ𝑘 ∈ (𝑢 ∪ {𝑣})𝐵)
10	9	fveq2d 5676	. . 3 ⊢ (𝑤 = (𝑢 ∪ {𝑣}) → (𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = (𝐹‘Σ𝑘 ∈ (𝑢 ∪ {𝑣})𝐵))
11		sumeq1 12044	. . 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 12044	. . . 4 ⊢ (𝑤 = 𝐴 → Σ𝑘 ∈ 𝑤 𝐵 = Σ𝑘 ∈ 𝐴 𝐵)
14	13	fveq2d 5676	. . 3 ⊢ (𝑤 = 𝐴 → (𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = (𝐹‘Σ𝑘 ∈ 𝐴 𝐵))
15		sumeq1 12044	. . 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 8268	. . . . . . . 8 ⊢ 0 ∈ ℂ
18		fsumrelem.3	. . . . . . . . 9 ⊢ 𝐹:ℂ⟶ℂ
19	18	ffvelcdmi 5813	. . . . . . . 8 ⊢ (0 ∈ ℂ → (𝐹‘0) ∈ ℂ)
20	17, 19	ax-mp 5	. . . . . . 7 ⊢ (𝐹‘0) ∈ ℂ
21	20	addridi 8417	. . . . . 6 ⊢ ((𝐹‘0) + 0) = (𝐹‘0)
22		fvoveq1 6075	. . . . . . . . 9 ⊢ (𝑥 = 0 → (𝐹‘(𝑥 + 𝑦)) = (𝐹‘(0 + 𝑦)))
23		fveq2 5672	. . . . . . . . . 10 ⊢ (𝑥 = 0 → (𝐹‘𝑥) = (𝐹‘0))
24	23	oveq1d 6067	. . . . . . . . 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 6060	. . . . . . . . . . 11 ⊢ (𝑦 = 0 → (0 + 𝑦) = (0 + 0))
27		00id 8416	. . . . . . . . . . 11 ⊢ (0 + 0) = 0
28	26, 27	eqtrdi 2283	. . . . . . . . . 10 ⊢ (𝑦 = 0 → (0 + 𝑦) = 0)
29	28	fveq2d 5676	. . . . . . . . 9 ⊢ (𝑦 = 0 → (𝐹‘(0 + 𝑦)) = (𝐹‘0))
30		fveq2 5672	. . . . . . . . . 10 ⊢ (𝑦 = 0 → (𝐹‘𝑦) = (𝐹‘0))
31	30	oveq2d 6068	. . . . . . . . 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 8457	. . . . 5 ⊢ (((𝐹‘0) + (𝐹‘0)) = ((𝐹‘0) + 0) ↔ (𝐹‘0) = 0)
38	36, 37	mpbi 145	. . . 4 ⊢ (𝐹‘0) = 0
39		sum0 12078	. . . . 5 ⊢ Σ𝑘 ∈ ∅ 𝐵 = 0
40	39	fveq2i 5675	. . . 4 ⊢ (𝐹‘Σ𝑘 ∈ ∅ 𝐵) = (𝐹‘0)
41		sum0 12078	. . . 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 3173	. . . . . . . 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 3225	. . . . . . . 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 3240	. . . . . . . . 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 3149	. . . . . . . 8 ⊢ (𝑘 = 𝑣 → 𝐵 = ⦋𝑣 / 𝑘⦌𝐵)
57	49	eldifad 3224	. . . . . . . . 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 12100	. . . . . . 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 5676	. . . . 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 12090	. . . . . . 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 6075	. . . . . . . 8 ⊢ (𝑥 = Σ𝑘 ∈ 𝑢 𝐵 → (𝐹‘(𝑥 + 𝑦)) = (𝐹‘(Σ𝑘 ∈ 𝑢 𝐵 + 𝑦)))
71		fveq2 5672	. . . . . . . . 9 ⊢ (𝑥 = Σ𝑘 ∈ 𝑢 𝐵 → (𝐹‘𝑥) = (𝐹‘Σ𝑘 ∈ 𝑢 𝐵))
72	71	oveq1d 6067	. . . . . . . 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 6060	. . . . . . . . 9 ⊢ (𝑦 = ⦋𝑣 / 𝑘⦌𝐵 → (Σ𝑘 ∈ 𝑢 𝐵 + 𝑦) = (Σ𝑘 ∈ 𝑢 𝐵 + ⦋𝑣 / 𝑘⦌𝐵))
75	74	fveq2d 5676	. . . . . . . 8 ⊢ (𝑦 = ⦋𝑣 / 𝑘⦌𝐵 → (𝐹‘(Σ𝑘 ∈ 𝑢 𝐵 + 𝑦)) = (𝐹‘(Σ𝑘 ∈ 𝑢 𝐵 + ⦋𝑣 / 𝑘⦌𝐵)))
76		fveq2 5672	. . . . . . . . 9 ⊢ (𝑦 = ⦋𝑣 / 𝑘⦌𝐵 → (𝐹‘𝑦) = (𝐹‘⦋𝑣 / 𝑘⦌𝐵))
77	76	oveq2d 6068	. . . . . . . 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 6067	. . . . 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 5682	. . . . . 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 5815	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ 𝑘 ∈ 𝑢) → (𝐹‘𝐵) ∈ ℂ)
88	56	fveq2d 5676	. . . . . 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 5815	. . . . . 6 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → (𝐹‘⦋𝑣 / 𝑘⦌𝐵) ∈ ℂ)
91	44, 85, 46, 48, 50, 87, 88, 90	fsumsplitsn 12100	. . . . 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 7151	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 3140   ∖ cdif 3210   ∪ cun 3211   ⊆ wss 3213  ∅c0 3510  {csn 3691  ⟶wf 5350  ‘cfv 5354  (class class class)co 6052  Fincfn 6977  ℂcc 8127  0cc0 8129   + caddc 8132  Σcsu 12042

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 4227  ax-sep 4230  ax-nul 4238  ax-pow 4289  ax-pr 4324  ax-un 4556  ax-setind 4661  ax-iinf 4712  ax-cnex 8220  ax-resscn 8221  ax-1cn 8222  ax-1re 8223  ax-icn 8224  ax-addcl 8225  ax-addrcl 8226  ax-mulcl 8227  ax-mulrcl 8228  ax-addcom 8229  ax-mulcom 8230  ax-addass 8231  ax-mulass 8232  ax-distr 8233  ax-i2m1 8234  ax-0lt1 8235  ax-1rid 8236  ax-0id 8237  ax-rnegex 8238  ax-precex 8239  ax-cnre 8240  ax-pre-ltirr 8241  ax-pre-ltwlin 8242  ax-pre-lttrn 8243  ax-pre-apti 8244  ax-pre-ltadd 8245  ax-pre-mulgt0 8246  ax-pre-mulext 8247  ax-arch 8248  ax-caucvg 8249

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 3045  df-csb 3141  df-dif 3215  df-un 3217  df-in 3219  df-ss 3226  df-nul 3511  df-if 3623  df-pw 3673  df-sn 3697  df-pr 3698  df-op 3700  df-uni 3917  df-int 3952  df-iun 3995  df-br 4112  df-opab 4174  df-mpt 4175  df-tr 4211  df-id 4416  df-po 4419  df-iso 4420  df-iord 4489  df-on 4491  df-ilim 4492  df-suc 4494  df-iom 4715  df-xp 4757  df-rel 4758  df-cnv 4759  df-co 4760  df-dm 4761  df-rn 4762  df-res 4763  df-ima 4764  df-iota 5314  df-fun 5356  df-fn 5357  df-f 5358  df-f1 5359  df-fo 5360  df-f1o 5361  df-fv 5362  df-isom 5363  df-riota 6005  df-ov 6055  df-oprab 6056  df-mpo 6057  df-1st 6336  df-2nd 6337  df-recs 6538  df-irdg 6603  df-frec 6624  df-1o 6649  df-oadd 6653  df-er 6769  df-en 6978  df-dom 6979  df-fin 6980  df-pnf 8312  df-mnf 8313  df-xr 8314  df-ltxr 8315  df-le 8316  df-sub 8448  df-neg 8449  df-reap 8851  df-ap 8858  df-div 8949  df-inn 9240  df-2 9298  df-3 9299  df-4 9300  df-n0 9499  df-z 9580  df-uz 9857  df-q 9955  df-rp 9990  df-fz 10346  df-fzo 10481  df-seqfrec 10814  df-exp 10905  df-ihash 11143  df-cj 11531  df-re 11532  df-im 11533  df-rsqrt 11687  df-abs 11688  df-clim 11968  df-sumdc 12043

This theorem is referenced by:  fsumre  12162  fsumim  12163  fsumcj  12164