Theorem fsumrelem 12022

Description: Lemma for fsumre 12023, fsumim 12024, and fsumcj 12025. (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 11906	. . . 4 ⊢ (𝑤 = ∅ → Σ𝑘 ∈ 𝑤 𝐵 = Σ𝑘 ∈ ∅ 𝐵)
2	1	fveq2d 5639	. . 3 ⊢ (𝑤 = ∅ → (𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = (𝐹‘Σ𝑘 ∈ ∅ 𝐵))
3		sumeq1 11906	. . 3 ⊢ (𝑤 = ∅ → Σ𝑘 ∈ 𝑤 (𝐹‘𝐵) = Σ𝑘 ∈ ∅ (𝐹‘𝐵))
4	2, 3	eqeq12d 2244	. 2 ⊢ (𝑤 = ∅ → ((𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = Σ𝑘 ∈ 𝑤 (𝐹‘𝐵) ↔ (𝐹‘Σ𝑘 ∈ ∅ 𝐵) = Σ𝑘 ∈ ∅ (𝐹‘𝐵)))
5		sumeq1 11906	. . . 4 ⊢ (𝑤 = 𝑢 → Σ𝑘 ∈ 𝑤 𝐵 = Σ𝑘 ∈ 𝑢 𝐵)
6	5	fveq2d 5639	. . 3 ⊢ (𝑤 = 𝑢 → (𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = (𝐹‘Σ𝑘 ∈ 𝑢 𝐵))
7		sumeq1 11906	. . 3 ⊢ (𝑤 = 𝑢 → Σ𝑘 ∈ 𝑤 (𝐹‘𝐵) = Σ𝑘 ∈ 𝑢 (𝐹‘𝐵))
8	6, 7	eqeq12d 2244	. 2 ⊢ (𝑤 = 𝑢 → ((𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = Σ𝑘 ∈ 𝑤 (𝐹‘𝐵) ↔ (𝐹‘Σ𝑘 ∈ 𝑢 𝐵) = Σ𝑘 ∈ 𝑢 (𝐹‘𝐵)))
9		sumeq1 11906	. . . 4 ⊢ (𝑤 = (𝑢 ∪ {𝑣}) → Σ𝑘 ∈ 𝑤 𝐵 = Σ𝑘 ∈ (𝑢 ∪ {𝑣})𝐵)
10	9	fveq2d 5639	. . 3 ⊢ (𝑤 = (𝑢 ∪ {𝑣}) → (𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = (𝐹‘Σ𝑘 ∈ (𝑢 ∪ {𝑣})𝐵))
11		sumeq1 11906	. . 3 ⊢ (𝑤 = (𝑢 ∪ {𝑣}) → Σ𝑘 ∈ 𝑤 (𝐹‘𝐵) = Σ𝑘 ∈ (𝑢 ∪ {𝑣})(𝐹‘𝐵))
12	10, 11	eqeq12d 2244	. 2 ⊢ (𝑤 = (𝑢 ∪ {𝑣}) → ((𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = Σ𝑘 ∈ 𝑤 (𝐹‘𝐵) ↔ (𝐹‘Σ𝑘 ∈ (𝑢 ∪ {𝑣})𝐵) = Σ𝑘 ∈ (𝑢 ∪ {𝑣})(𝐹‘𝐵)))
13		sumeq1 11906	. . . 4 ⊢ (𝑤 = 𝐴 → Σ𝑘 ∈ 𝑤 𝐵 = Σ𝑘 ∈ 𝐴 𝐵)
14	13	fveq2d 5639	. . 3 ⊢ (𝑤 = 𝐴 → (𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = (𝐹‘Σ𝑘 ∈ 𝐴 𝐵))
15		sumeq1 11906	. . 3 ⊢ (𝑤 = 𝐴 → Σ𝑘 ∈ 𝑤 (𝐹‘𝐵) = Σ𝑘 ∈ 𝐴 (𝐹‘𝐵))
16	14, 15	eqeq12d 2244	. 2 ⊢ (𝑤 = 𝐴 → ((𝐹‘Σ𝑘 ∈ 𝑤 𝐵) = Σ𝑘 ∈ 𝑤 (𝐹‘𝐵) ↔ (𝐹‘Σ𝑘 ∈ 𝐴 𝐵) = Σ𝑘 ∈ 𝐴 (𝐹‘𝐵)))
17		0cn 8161	. . . . . . . 8 ⊢ 0 ∈ ℂ
18		fsumrelem.3	. . . . . . . . 9 ⊢ 𝐹:ℂ⟶ℂ
19	18	ffvelcdmi 5777	. . . . . . . 8 ⊢ (0 ∈ ℂ → (𝐹‘0) ∈ ℂ)
20	17, 19	ax-mp 5	. . . . . . 7 ⊢ (𝐹‘0) ∈ ℂ
21	20	addridi 8311	. . . . . 6 ⊢ ((𝐹‘0) + 0) = (𝐹‘0)
22		fvoveq1 6036	. . . . . . . . 9 ⊢ (𝑥 = 0 → (𝐹‘(𝑥 + 𝑦)) = (𝐹‘(0 + 𝑦)))
23		fveq2 5635	. . . . . . . . . 10 ⊢ (𝑥 = 0 → (𝐹‘𝑥) = (𝐹‘0))
24	23	oveq1d 6028	. . . . . . . . 9 ⊢ (𝑥 = 0 → ((𝐹‘𝑥) + (𝐹‘𝑦)) = ((𝐹‘0) + (𝐹‘𝑦)))
25	22, 24	eqeq12d 2244	. . . . . . . 8 ⊢ (𝑥 = 0 → ((𝐹‘(𝑥 + 𝑦)) = ((𝐹‘𝑥) + (𝐹‘𝑦)) ↔ (𝐹‘(0 + 𝑦)) = ((𝐹‘0) + (𝐹‘𝑦))))
26		oveq2 6021	. . . . . . . . . . 11 ⊢ (𝑦 = 0 → (0 + 𝑦) = (0 + 0))
27		00id 8310	. . . . . . . . . . 11 ⊢ (0 + 0) = 0
28	26, 27	eqtrdi 2278	. . . . . . . . . 10 ⊢ (𝑦 = 0 → (0 + 𝑦) = 0)
29	28	fveq2d 5639	. . . . . . . . 9 ⊢ (𝑦 = 0 → (𝐹‘(0 + 𝑦)) = (𝐹‘0))
30		fveq2 5635	. . . . . . . . . 10 ⊢ (𝑦 = 0 → (𝐹‘𝑦) = (𝐹‘0))
31	30	oveq2d 6029	. . . . . . . . 9 ⊢ (𝑦 = 0 → ((𝐹‘0) + (𝐹‘𝑦)) = ((𝐹‘0) + (𝐹‘0)))
32	29, 31	eqeq12d 2244	. . . . . . . 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 2870	. . . . . . 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 2251	. . . . 5 ⊢ ((𝐹‘0) + (𝐹‘0)) = ((𝐹‘0) + 0)
37	20, 20, 17	addcani 8351	. . . . 5 ⊢ (((𝐹‘0) + (𝐹‘0)) = ((𝐹‘0) + 0) ↔ (𝐹‘0) = 0)
38	36, 37	mpbi 145	. . . 4 ⊢ (𝐹‘0) = 0
39		sum0 11939	. . . . 5 ⊢ Σ𝑘 ∈ ∅ 𝐵 = 0
40	39	fveq2i 5638	. . . 4 ⊢ (𝐹‘Σ𝑘 ∈ ∅ 𝐵) = (𝐹‘0)
41		sum0 11939	. . . 4 ⊢ Σ𝑘 ∈ ∅ (𝐹‘𝐵) = 0
42	38, 40, 41	3eqtr4i 2260	. . 3 ⊢ (𝐹‘Σ𝑘 ∈ ∅ 𝐵) = Σ𝑘 ∈ ∅ (𝐹‘𝐵)
43	42	a1i 9	. 2 ⊢ (𝜑 → (𝐹‘Σ𝑘 ∈ ∅ 𝐵) = Σ𝑘 ∈ ∅ (𝐹‘𝐵))
44		nfv 1574	. . . . . . . 8 ⊢ Ⅎ𝑘((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢)))
45		nfcsb1v 3158	. . . . . . . 8 ⊢ Ⅎ𝑘⦋𝑣 / 𝑘⦌𝐵
46		simplr 528	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → 𝑢 ∈ Fin)
47		vex 2803	. . . . . . . . 9 ⊢ 𝑣 ∈ V
48	47	a1i 9	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → 𝑣 ∈ V)
49		simprr 531	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → 𝑣 ∈ (𝐴 ∖ 𝑢))
50	49	eldifbd 3210	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → ¬ 𝑣 ∈ 𝑢)
51		simplll 533	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ 𝑘 ∈ 𝑢) → 𝜑)
52		simprl 529	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → 𝑢 ⊆ 𝐴)
53	52	sselda 3225	. . . . . . . . 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 3134	. . . . . . . 8 ⊢ (𝑘 = 𝑣 → 𝐵 = ⦋𝑣 / 𝑘⦌𝐵)
57	49	eldifad 3209	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → 𝑣 ∈ 𝐴)
58	54	ralrimiva 2603	. . . . . . . . . 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 2383	. . . . . . . . . 10 ⊢ Ⅎ𝑘⦋𝑣 / 𝑘⦌𝐵 ∈ ℂ
61	56	eleq1d 2298	. . . . . . . . . 10 ⊢ (𝑘 = 𝑣 → (𝐵 ∈ ℂ ↔ ⦋𝑣 / 𝑘⦌𝐵 ∈ ℂ))
62	60, 61	rspc 2902	. . . . . . . . 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 11961	. . . . . . 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 5639	. . . . 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 11951	. . . . . . 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 6036	. . . . . . . 8 ⊢ (𝑥 = Σ𝑘 ∈ 𝑢 𝐵 → (𝐹‘(𝑥 + 𝑦)) = (𝐹‘(Σ𝑘 ∈ 𝑢 𝐵 + 𝑦)))
71		fveq2 5635	. . . . . . . . 9 ⊢ (𝑥 = Σ𝑘 ∈ 𝑢 𝐵 → (𝐹‘𝑥) = (𝐹‘Σ𝑘 ∈ 𝑢 𝐵))
72	71	oveq1d 6028	. . . . . . . 8 ⊢ (𝑥 = Σ𝑘 ∈ 𝑢 𝐵 → ((𝐹‘𝑥) + (𝐹‘𝑦)) = ((𝐹‘Σ𝑘 ∈ 𝑢 𝐵) + (𝐹‘𝑦)))
73	70, 72	eqeq12d 2244	. . . . . . 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 6021	. . . . . . . . 9 ⊢ (𝑦 = ⦋𝑣 / 𝑘⦌𝐵 → (Σ𝑘 ∈ 𝑢 𝐵 + 𝑦) = (Σ𝑘 ∈ 𝑢 𝐵 + ⦋𝑣 / 𝑘⦌𝐵))
75	74	fveq2d 5639	. . . . . . . 8 ⊢ (𝑦 = ⦋𝑣 / 𝑘⦌𝐵 → (𝐹‘(Σ𝑘 ∈ 𝑢 𝐵 + 𝑦)) = (𝐹‘(Σ𝑘 ∈ 𝑢 𝐵 + ⦋𝑣 / 𝑘⦌𝐵)))
76		fveq2 5635	. . . . . . . . 9 ⊢ (𝑦 = ⦋𝑣 / 𝑘⦌𝐵 → (𝐹‘𝑦) = (𝐹‘⦋𝑣 / 𝑘⦌𝐵))
77	76	oveq2d 6029	. . . . . . . 8 ⊢ (𝑦 = ⦋𝑣 / 𝑘⦌𝐵 → ((𝐹‘Σ𝑘 ∈ 𝑢 𝐵) + (𝐹‘𝑦)) = ((𝐹‘Σ𝑘 ∈ 𝑢 𝐵) + (𝐹‘⦋𝑣 / 𝑘⦌𝐵)))
78	75, 77	eqeq12d 2244	. . . . . . 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 2870	. . . . . 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 6028	. . . . 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 2266	. . . 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 2372	. . . . . . 7 ⊢ Ⅎ𝑘𝐹
85	84, 45	nffv 5645	. . . . . 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 5779	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) ∧ 𝑘 ∈ 𝑢) → (𝐹‘𝐵) ∈ ℂ)
88	56	fveq2d 5639	. . . . . 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 5779	. . . . . 6 ⊢ (((𝜑 ∧ 𝑢 ∈ Fin) ∧ (𝑢 ⊆ 𝐴 ∧ 𝑣 ∈ (𝐴 ∖ 𝑢))) → (𝐹‘⦋𝑣 / 𝑘⦌𝐵) ∈ ℂ)
91	44, 85, 46, 48, 50, 87, 88, 90	fsumsplitsn 11961	. . . . 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 2265	. . 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 7074	1 ⊢ (𝜑 → (𝐹‘Σ𝑘 ∈ 𝐴 𝐵) = Σ𝑘 ∈ 𝐴 (𝐹‘𝐵))

Syntax hints:   → wi 4   ∧ wa 104   = wceq 1395   ∈ wcel 2200  ∀wral 2508  Vcvv 2800  ⦋csb 3125   ∖ cdif 3195   ∪ cun 3196   ⊆ wss 3198  ∅c0 3492  {csn 3667  ⟶wf 5320  ‘cfv 5324  (class class class)co 6013  Fincfn 6904  ℂcc 8020  0cc0 8022   + caddc 8025  Σcsu 11904

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 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-coll 4202  ax-sep 4205  ax-nul 4213  ax-pow 4262  ax-pr 4297  ax-un 4528  ax-setind 4633  ax-iinf 4684  ax-cnex 8113  ax-resscn 8114  ax-1cn 8115  ax-1re 8116  ax-icn 8117  ax-addcl 8118  ax-addrcl 8119  ax-mulcl 8120  ax-mulrcl 8121  ax-addcom 8122  ax-mulcom 8123  ax-addass 8124  ax-mulass 8125  ax-distr 8126  ax-i2m1 8127  ax-0lt1 8128  ax-1rid 8129  ax-0id 8130  ax-rnegex 8131  ax-precex 8132  ax-cnre 8133  ax-pre-ltirr 8134  ax-pre-ltwlin 8135  ax-pre-lttrn 8136  ax-pre-apti 8137  ax-pre-ltadd 8138  ax-pre-mulgt0 8139  ax-pre-mulext 8140  ax-arch 8141  ax-caucvg 8142

This theorem depends on definitions:  df-bi 117  df-dc 840  df-3or 1003  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-nel 2496  df-ral 2513  df-rex 2514  df-reu 2515  df-rmo 2516  df-rab 2517  df-v 2802  df-sbc 3030  df-csb 3126  df-dif 3200  df-un 3202  df-in 3204  df-ss 3211  df-nul 3493  df-if 3604  df-pw 3652  df-sn 3673  df-pr 3674  df-op 3676  df-uni 3892  df-int 3927  df-iun 3970  df-br 4087  df-opab 4149  df-mpt 4150  df-tr 4186  df-id 4388  df-po 4391  df-iso 4392  df-iord 4461  df-on 4463  df-ilim 4464  df-suc 4466  df-iom 4687  df-xp 4729  df-rel 4730  df-cnv 4731  df-co 4732  df-dm 4733  df-rn 4734  df-res 4735  df-ima 4736  df-iota 5284  df-fun 5326  df-fn 5327  df-f 5328  df-f1 5329  df-fo 5330  df-f1o 5331  df-fv 5332  df-isom 5333  df-riota 5966  df-ov 6016  df-oprab 6017  df-mpo 6018  df-1st 6298  df-2nd 6299  df-recs 6466  df-irdg 6531  df-frec 6552  df-1o 6577  df-oadd 6581  df-er 6697  df-en 6905  df-dom 6906  df-fin 6907  df-pnf 8206  df-mnf 8207  df-xr 8208  df-ltxr 8209  df-le 8210  df-sub 8342  df-neg 8343  df-reap 8745  df-ap 8752  df-div 8843  df-inn 9134  df-2 9192  df-3 9193  df-4 9194  df-n0 9393  df-z 9470  df-uz 9746  df-q 9844  df-rp 9879  df-fz 10234  df-fzo 10368  df-seqfrec 10700  df-exp 10791  df-ihash 11028  df-cj 11393  df-re 11394  df-im 11395  df-rsqrt 11549  df-abs 11550  df-clim 11830  df-sumdc 11905

This theorem is referenced by:  fsumre  12023  fsumim  12024  fsumcj  12025