Theorem dvmptfprod 44648

Description: Function-builder for derivative, finite product rule. (Contributed by Glauco Siliprandi, 5-Apr-2020.)

Hypotheses

Ref	Expression
dvmptfprod.iph	⊢ Ⅎ𝑖𝜑
dvmptfprod.jph	⊢ Ⅎ𝑗𝜑
dvmptfprod.j	⊢ 𝐽 = (𝐾 ↾t 𝑆)
dvmptfprod.k	⊢ 𝐾 = (TopOpen‘ℂfld)
dvmptfprod.s	⊢ (𝜑 → 𝑆 ∈ {ℝ, ℂ})
dvmptfprod.x	⊢ (𝜑 → 𝑋 ∈ 𝐽)
dvmptfprod.i	⊢ (𝜑 → 𝐼 ∈ Fin)
dvmptfprod.a	⊢ ((𝜑 ∧ 𝑖 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) → 𝐴 ∈ ℂ)
dvmptfprod.b	⊢ ((𝜑 ∧ 𝑖 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) → 𝐵 ∈ ℂ)
dvmptfprod.d	⊢ ((𝜑 ∧ 𝑖 ∈ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ 𝐴)) = (𝑥 ∈ 𝑋 ↦ 𝐵))
dvmptfprod.bc	⊢ (𝑖 = 𝑗 → 𝐵 = 𝐶)

Assertion

Ref	Expression
dvmptfprod	⊢ (𝜑 → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝐼 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝐼 (𝐶 · ∏𝑖 ∈ (𝐼 ∖ {𝑗})𝐴)))

Distinct variable groups:   𝐴,𝑗   𝐶,𝑖   𝑖,𝐼,𝑗,𝑥   𝑆,𝑖,𝑗,𝑥   𝑖,𝑋,𝑗,𝑥   𝜑,𝑥

Allowed substitution hints:   𝜑(𝑖,𝑗)   𝐴(𝑥,𝑖)   𝐵(𝑥,𝑖,𝑗)   𝐶(𝑥,𝑗)   𝐽(𝑥,𝑖,𝑗)   𝐾(𝑥,𝑖,𝑗)

Proof of Theorem dvmptfprod

Dummy variables 𝑎 𝑏 𝑐 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		dvmptfprod.i	. 2 ⊢ (𝜑 → 𝐼 ∈ Fin)
2		ssid 4004	. . 3 ⊢ 𝐼 ⊆ 𝐼
3	2	jctr 526	. 2 ⊢ (𝜑 → (𝜑 ∧ 𝐼 ⊆ 𝐼))
4		sseq1 4007	. . . . 5 ⊢ (𝑎 = ∅ → (𝑎 ⊆ 𝐼 ↔ ∅ ⊆ 𝐼))
5	4	anbi2d 630	. . . 4 ⊢ (𝑎 = ∅ → ((𝜑 ∧ 𝑎 ⊆ 𝐼) ↔ (𝜑 ∧ ∅ ⊆ 𝐼)))
6		prodeq1 15850	. . . . . . 7 ⊢ (𝑎 = ∅ → ∏𝑖 ∈ 𝑎 𝐴 = ∏𝑖 ∈ ∅ 𝐴)
7	6	mpteq2dv 5250	. . . . . 6 ⊢ (𝑎 = ∅ → (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑎 𝐴) = (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ ∅ 𝐴))
8	7	oveq2d 7422	. . . . 5 ⊢ (𝑎 = ∅ → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑎 𝐴)) = (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ ∅ 𝐴)))
9		sumeq1 15632	. . . . . . 7 ⊢ (𝑎 = ∅ → Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = Σ𝑗 ∈ ∅ (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴))
10		difeq1 4115	. . . . . . . . . 10 ⊢ (𝑎 = ∅ → (𝑎 ∖ {𝑗}) = (∅ ∖ {𝑗}))
11	10	prodeq1d 15862	. . . . . . . . 9 ⊢ (𝑎 = ∅ → ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴 = ∏𝑖 ∈ (∅ ∖ {𝑗})𝐴)
12	11	oveq2d 7422	. . . . . . . 8 ⊢ (𝑎 = ∅ → (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = (𝐶 · ∏𝑖 ∈ (∅ ∖ {𝑗})𝐴))
13	12	sumeq2sdv 15647	. . . . . . 7 ⊢ (𝑎 = ∅ → Σ𝑗 ∈ ∅ (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = Σ𝑗 ∈ ∅ (𝐶 · ∏𝑖 ∈ (∅ ∖ {𝑗})𝐴))
14	9, 13	eqtrd 2773	. . . . . 6 ⊢ (𝑎 = ∅ → Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = Σ𝑗 ∈ ∅ (𝐶 · ∏𝑖 ∈ (∅ ∖ {𝑗})𝐴))
15	14	mpteq2dv 5250	. . . . 5 ⊢ (𝑎 = ∅ → (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ ∅ (𝐶 · ∏𝑖 ∈ (∅ ∖ {𝑗})𝐴)))
16	8, 15	eqeq12d 2749	. . . 4 ⊢ (𝑎 = ∅ → ((𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑎 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴)) ↔ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ ∅ 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ ∅ (𝐶 · ∏𝑖 ∈ (∅ ∖ {𝑗})𝐴))))
17	5, 16	imbi12d 345	. . 3 ⊢ (𝑎 = ∅ → (((𝜑 ∧ 𝑎 ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑎 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴))) ↔ ((𝜑 ∧ ∅ ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ ∅ 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ ∅ (𝐶 · ∏𝑖 ∈ (∅ ∖ {𝑗})𝐴)))))
18		sseq1 4007	. . . . 5 ⊢ (𝑎 = 𝑏 → (𝑎 ⊆ 𝐼 ↔ 𝑏 ⊆ 𝐼))
19	18	anbi2d 630	. . . 4 ⊢ (𝑎 = 𝑏 → ((𝜑 ∧ 𝑎 ⊆ 𝐼) ↔ (𝜑 ∧ 𝑏 ⊆ 𝐼)))
20		prodeq1 15850	. . . . . . 7 ⊢ (𝑎 = 𝑏 → ∏𝑖 ∈ 𝑎 𝐴 = ∏𝑖 ∈ 𝑏 𝐴)
21	20	mpteq2dv 5250	. . . . . 6 ⊢ (𝑎 = 𝑏 → (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑎 𝐴) = (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴))
22	21	oveq2d 7422	. . . . 5 ⊢ (𝑎 = 𝑏 → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑎 𝐴)) = (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)))
23		sumeq1 15632	. . . . . . 7 ⊢ (𝑎 = 𝑏 → Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴))
24		difeq1 4115	. . . . . . . . . 10 ⊢ (𝑎 = 𝑏 → (𝑎 ∖ {𝑗}) = (𝑏 ∖ {𝑗}))
25	24	prodeq1d 15862	. . . . . . . . 9 ⊢ (𝑎 = 𝑏 → ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴 = ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴)
26	25	oveq2d 7422	. . . . . . . 8 ⊢ (𝑎 = 𝑏 → (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))
27	26	sumeq2sdv 15647	. . . . . . 7 ⊢ (𝑎 = 𝑏 → Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))
28	23, 27	eqtrd 2773	. . . . . 6 ⊢ (𝑎 = 𝑏 → Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))
29	28	mpteq2dv 5250	. . . . 5 ⊢ (𝑎 = 𝑏 → (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴)))
30	22, 29	eqeq12d 2749	. . . 4 ⊢ (𝑎 = 𝑏 → ((𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑎 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴)) ↔ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))))
31	19, 30	imbi12d 345	. . 3 ⊢ (𝑎 = 𝑏 → (((𝜑 ∧ 𝑎 ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑎 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴))) ↔ ((𝜑 ∧ 𝑏 ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴)))))
32		sseq1 4007	. . . . 5 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → (𝑎 ⊆ 𝐼 ↔ (𝑏 ∪ {𝑐}) ⊆ 𝐼))
33	32	anbi2d 630	. . . 4 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → ((𝜑 ∧ 𝑎 ⊆ 𝐼) ↔ (𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼)))
34		prodeq1 15850	. . . . . . 7 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → ∏𝑖 ∈ 𝑎 𝐴 = ∏𝑖 ∈ (𝑏 ∪ {𝑐})𝐴)
35	34	mpteq2dv 5250	. . . . . 6 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑎 𝐴) = (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ (𝑏 ∪ {𝑐})𝐴))
36	35	oveq2d 7422	. . . . 5 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑎 𝐴)) = (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ (𝑏 ∪ {𝑐})𝐴)))
37		sumeq1 15632	. . . . . . 7 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = Σ𝑗 ∈ (𝑏 ∪ {𝑐})(𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴))
38		difeq1 4115	. . . . . . . . . 10 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → (𝑎 ∖ {𝑗}) = ((𝑏 ∪ {𝑐}) ∖ {𝑗}))
39	38	prodeq1d 15862	. . . . . . . . 9 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴 = ∏𝑖 ∈ ((𝑏 ∪ {𝑐}) ∖ {𝑗})𝐴)
40	39	oveq2d 7422	. . . . . . . 8 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = (𝐶 · ∏𝑖 ∈ ((𝑏 ∪ {𝑐}) ∖ {𝑗})𝐴))
41	40	sumeq2sdv 15647	. . . . . . 7 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → Σ𝑗 ∈ (𝑏 ∪ {𝑐})(𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = Σ𝑗 ∈ (𝑏 ∪ {𝑐})(𝐶 · ∏𝑖 ∈ ((𝑏 ∪ {𝑐}) ∖ {𝑗})𝐴))
42	37, 41	eqtrd 2773	. . . . . 6 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = Σ𝑗 ∈ (𝑏 ∪ {𝑐})(𝐶 · ∏𝑖 ∈ ((𝑏 ∪ {𝑐}) ∖ {𝑗})𝐴))
43	42	mpteq2dv 5250	. . . . 5 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ (𝑏 ∪ {𝑐})(𝐶 · ∏𝑖 ∈ ((𝑏 ∪ {𝑐}) ∖ {𝑗})𝐴)))
44	36, 43	eqeq12d 2749	. . . 4 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → ((𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑎 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴)) ↔ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ (𝑏 ∪ {𝑐})𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ (𝑏 ∪ {𝑐})(𝐶 · ∏𝑖 ∈ ((𝑏 ∪ {𝑐}) ∖ {𝑗})𝐴))))
45	33, 44	imbi12d 345	. . 3 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → (((𝜑 ∧ 𝑎 ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑎 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴))) ↔ ((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ (𝑏 ∪ {𝑐})𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ (𝑏 ∪ {𝑐})(𝐶 · ∏𝑖 ∈ ((𝑏 ∪ {𝑐}) ∖ {𝑗})𝐴)))))
46		sseq1 4007	. . . . 5 ⊢ (𝑎 = 𝐼 → (𝑎 ⊆ 𝐼 ↔ 𝐼 ⊆ 𝐼))
47	46	anbi2d 630	. . . 4 ⊢ (𝑎 = 𝐼 → ((𝜑 ∧ 𝑎 ⊆ 𝐼) ↔ (𝜑 ∧ 𝐼 ⊆ 𝐼)))
48		prodeq1 15850	. . . . . . 7 ⊢ (𝑎 = 𝐼 → ∏𝑖 ∈ 𝑎 𝐴 = ∏𝑖 ∈ 𝐼 𝐴)
49	48	mpteq2dv 5250	. . . . . 6 ⊢ (𝑎 = 𝐼 → (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑎 𝐴) = (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝐼 𝐴))
50	49	oveq2d 7422	. . . . 5 ⊢ (𝑎 = 𝐼 → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑎 𝐴)) = (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝐼 𝐴)))
51		sumeq1 15632	. . . . . . 7 ⊢ (𝑎 = 𝐼 → Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = Σ𝑗 ∈ 𝐼 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴))
52		difeq1 4115	. . . . . . . . . . . 12 ⊢ (𝑎 = 𝐼 → (𝑎 ∖ {𝑗}) = (𝐼 ∖ {𝑗}))
53	52	prodeq1d 15862	. . . . . . . . . . 11 ⊢ (𝑎 = 𝐼 → ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴 = ∏𝑖 ∈ (𝐼 ∖ {𝑗})𝐴)
54	53	oveq2d 7422	. . . . . . . . . 10 ⊢ (𝑎 = 𝐼 → (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = (𝐶 · ∏𝑖 ∈ (𝐼 ∖ {𝑗})𝐴))
55	54	a1d 25	. . . . . . . . 9 ⊢ (𝑎 = 𝐼 → (𝑗 ∈ 𝐼 → (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = (𝐶 · ∏𝑖 ∈ (𝐼 ∖ {𝑗})𝐴)))
56	55	ralrimiv 3146	. . . . . . . 8 ⊢ (𝑎 = 𝐼 → ∀𝑗 ∈ 𝐼 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = (𝐶 · ∏𝑖 ∈ (𝐼 ∖ {𝑗})𝐴))
57	56	sumeq2d 15645	. . . . . . 7 ⊢ (𝑎 = 𝐼 → Σ𝑗 ∈ 𝐼 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = Σ𝑗 ∈ 𝐼 (𝐶 · ∏𝑖 ∈ (𝐼 ∖ {𝑗})𝐴))
58	51, 57	eqtrd 2773	. . . . . 6 ⊢ (𝑎 = 𝐼 → Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴) = Σ𝑗 ∈ 𝐼 (𝐶 · ∏𝑖 ∈ (𝐼 ∖ {𝑗})𝐴))
59	58	mpteq2dv 5250	. . . . 5 ⊢ (𝑎 = 𝐼 → (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝐼 (𝐶 · ∏𝑖 ∈ (𝐼 ∖ {𝑗})𝐴)))
60	50, 59	eqeq12d 2749	. . . 4 ⊢ (𝑎 = 𝐼 → ((𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑎 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴)) ↔ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝐼 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝐼 (𝐶 · ∏𝑖 ∈ (𝐼 ∖ {𝑗})𝐴))))
61	47, 60	imbi12d 345	. . 3 ⊢ (𝑎 = 𝐼 → (((𝜑 ∧ 𝑎 ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑎 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑎 (𝐶 · ∏𝑖 ∈ (𝑎 ∖ {𝑗})𝐴))) ↔ ((𝜑 ∧ 𝐼 ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝐼 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝐼 (𝐶 · ∏𝑖 ∈ (𝐼 ∖ {𝑗})𝐴)))))
62		prod0 15884	. . . . . . . 8 ⊢ ∏𝑖 ∈ ∅ 𝐴 = 1
63	62	mpteq2i 5253	. . . . . . 7 ⊢ (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ ∅ 𝐴) = (𝑥 ∈ 𝑋 ↦ 1)
64	63	oveq2i 7417	. . . . . 6 ⊢ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ ∅ 𝐴)) = (𝑆 D (𝑥 ∈ 𝑋 ↦ 1))
65	64	a1i 11	. . . . 5 ⊢ (𝜑 → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ ∅ 𝐴)) = (𝑆 D (𝑥 ∈ 𝑋 ↦ 1)))
66		dvmptfprod.s	. . . . . 6 ⊢ (𝜑 → 𝑆 ∈ {ℝ, ℂ})
67		dvmptfprod.x	. . . . . . 7 ⊢ (𝜑 → 𝑋 ∈ 𝐽)
68		dvmptfprod.j	. . . . . . . 8 ⊢ 𝐽 = (𝐾 ↾t 𝑆)
69		dvmptfprod.k	. . . . . . . . 9 ⊢ 𝐾 = (TopOpen‘ℂfld)
70	69	oveq1i 7416	. . . . . . . 8 ⊢ (𝐾 ↾t 𝑆) = ((TopOpen‘ℂfld) ↾t 𝑆)
71	68, 70	eqtri 2761	. . . . . . 7 ⊢ 𝐽 = ((TopOpen‘ℂfld) ↾t 𝑆)
72	67, 71	eleqtrdi 2844	. . . . . 6 ⊢ (𝜑 → 𝑋 ∈ ((TopOpen‘ℂfld) ↾t 𝑆))
73		1cnd 11206	. . . . . 6 ⊢ (𝜑 → 1 ∈ ℂ)
74	66, 72, 73	dvmptconst 44618	. . . . 5 ⊢ (𝜑 → (𝑆 D (𝑥 ∈ 𝑋 ↦ 1)) = (𝑥 ∈ 𝑋 ↦ 0))
75		sum0 15664	. . . . . . . 8 ⊢ Σ𝑗 ∈ ∅ (𝐶 · ∏𝑖 ∈ (∅ ∖ {𝑗})𝐴) = 0
76	75	eqcomi 2742	. . . . . . 7 ⊢ 0 = Σ𝑗 ∈ ∅ (𝐶 · ∏𝑖 ∈ (∅ ∖ {𝑗})𝐴)
77	76	mpteq2i 5253	. . . . . 6 ⊢ (𝑥 ∈ 𝑋 ↦ 0) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ ∅ (𝐶 · ∏𝑖 ∈ (∅ ∖ {𝑗})𝐴))
78	77	a1i 11	. . . . 5 ⊢ (𝜑 → (𝑥 ∈ 𝑋 ↦ 0) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ ∅ (𝐶 · ∏𝑖 ∈ (∅ ∖ {𝑗})𝐴)))
79	65, 74, 78	3eqtrd 2777	. . . 4 ⊢ (𝜑 → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ ∅ 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ ∅ (𝐶 · ∏𝑖 ∈ (∅ ∖ {𝑗})𝐴)))
80	79	adantr 482	. . 3 ⊢ ((𝜑 ∧ ∅ ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ ∅ 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ ∅ (𝐶 · ∏𝑖 ∈ (∅ ∖ {𝑗})𝐴)))
81		simp3 1139	. . . . 5 ⊢ (((𝑏 ∈ Fin ∧ ¬ 𝑐 ∈ 𝑏) ∧ ((𝜑 ∧ 𝑏 ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ (𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼)) → (𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼))
82		simp1r 1199	. . . . 5 ⊢ (((𝑏 ∈ Fin ∧ ¬ 𝑐 ∈ 𝑏) ∧ ((𝜑 ∧ 𝑏 ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ (𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼)) → ¬ 𝑐 ∈ 𝑏)
83		simpl 484	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) → 𝜑)
84		ssun1 4172	. . . . . . . . . . 11 ⊢ 𝑏 ⊆ (𝑏 ∪ {𝑐})
85		sstr2 3989	. . . . . . . . . . 11 ⊢ (𝑏 ⊆ (𝑏 ∪ {𝑐}) → ((𝑏 ∪ {𝑐}) ⊆ 𝐼 → 𝑏 ⊆ 𝐼))
86	84, 85	ax-mp 5	. . . . . . . . . 10 ⊢ ((𝑏 ∪ {𝑐}) ⊆ 𝐼 → 𝑏 ⊆ 𝐼)
87	86	adantl 483	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) → 𝑏 ⊆ 𝐼)
88	83, 87	jca 513	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) → (𝜑 ∧ 𝑏 ⊆ 𝐼))
89	88	adantl 483	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑏 ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ (𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼)) → (𝜑 ∧ 𝑏 ⊆ 𝐼))
90		simpl 484	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑏 ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ (𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼)) → ((𝜑 ∧ 𝑏 ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))))
91	89, 90	mpd 15	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑏 ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ (𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼)) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴)))
92	91	3adant1 1131	. . . . 5 ⊢ (((𝑏 ∈ Fin ∧ ¬ 𝑐 ∈ 𝑏) ∧ ((𝜑 ∧ 𝑏 ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ (𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼)) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴)))
93		nfv 1918	. . . . . . 7 ⊢ Ⅎ𝑥((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏)
94		nfcv 2904	. . . . . . . . 9 ⊢ Ⅎ𝑥𝑆
95		nfcv 2904	. . . . . . . . 9 ⊢ Ⅎ𝑥 D
96		nfmpt1 5256	. . . . . . . . 9 ⊢ Ⅎ𝑥(𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)
97	94, 95, 96	nfov 7436	. . . . . . . 8 ⊢ Ⅎ𝑥(𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴))
98		nfmpt1 5256	. . . . . . . 8 ⊢ Ⅎ𝑥(𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))
99	97, 98	nfeq 2917	. . . . . . 7 ⊢ Ⅎ𝑥(𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))
100	93, 99	nfan 1903	. . . . . 6 ⊢ Ⅎ𝑥(((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴)))
101		dvmptfprod.iph	. . . . . . . . 9 ⊢ Ⅎ𝑖𝜑
102		nfv 1918	. . . . . . . . 9 ⊢ Ⅎ𝑖(𝑏 ∪ {𝑐}) ⊆ 𝐼
103	101, 102	nfan 1903	. . . . . . . 8 ⊢ Ⅎ𝑖(𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼)
104		nfv 1918	. . . . . . . 8 ⊢ Ⅎ𝑖 ¬ 𝑐 ∈ 𝑏
105	103, 104	nfan 1903	. . . . . . 7 ⊢ Ⅎ𝑖((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏)
106		nfcv 2904	. . . . . . . . 9 ⊢ Ⅎ𝑖𝑆
107		nfcv 2904	. . . . . . . . 9 ⊢ Ⅎ𝑖 D
108		nfcv 2904	. . . . . . . . . 10 ⊢ Ⅎ𝑖𝑋
109		nfcv 2904	. . . . . . . . . . 11 ⊢ Ⅎ𝑖𝑏
110	109	nfcprod1 15851	. . . . . . . . . 10 ⊢ Ⅎ𝑖∏𝑖 ∈ 𝑏 𝐴
111	108, 110	nfmpt 5255	. . . . . . . . 9 ⊢ Ⅎ𝑖(𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)
112	106, 107, 111	nfov 7436	. . . . . . . 8 ⊢ Ⅎ𝑖(𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴))
113		nfcv 2904	. . . . . . . . . . 11 ⊢ Ⅎ𝑖𝐶
114		nfcv 2904	. . . . . . . . . . 11 ⊢ Ⅎ𝑖 ·
115		nfcv 2904	. . . . . . . . . . . 12 ⊢ Ⅎ𝑖(𝑏 ∖ {𝑗})
116	115	nfcprod1 15851	. . . . . . . . . . 11 ⊢ Ⅎ𝑖∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴
117	113, 114, 116	nfov 7436	. . . . . . . . . 10 ⊢ Ⅎ𝑖(𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴)
118	109, 117	nfsum 15634	. . . . . . . . 9 ⊢ Ⅎ𝑖Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴)
119	108, 118	nfmpt 5255	. . . . . . . 8 ⊢ Ⅎ𝑖(𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))
120	112, 119	nfeq 2917	. . . . . . 7 ⊢ Ⅎ𝑖(𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))
121	105, 120	nfan 1903	. . . . . 6 ⊢ Ⅎ𝑖(((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴)))
122		dvmptfprod.jph	. . . . . . . . 9 ⊢ Ⅎ𝑗𝜑
123		nfv 1918	. . . . . . . . 9 ⊢ Ⅎ𝑗(𝑏 ∪ {𝑐}) ⊆ 𝐼
124	122, 123	nfan 1903	. . . . . . . 8 ⊢ Ⅎ𝑗(𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼)
125		nfv 1918	. . . . . . . 8 ⊢ Ⅎ𝑗 ¬ 𝑐 ∈ 𝑏
126	124, 125	nfan 1903	. . . . . . 7 ⊢ Ⅎ𝑗((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏)
127		nfcv 2904	. . . . . . . 8 ⊢ Ⅎ𝑗(𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴))
128		nfcv 2904	. . . . . . . . 9 ⊢ Ⅎ𝑗𝑋
129		nfcv 2904	. . . . . . . . . 10 ⊢ Ⅎ𝑗𝑏
130	129	nfsum1 15633	. . . . . . . . 9 ⊢ Ⅎ𝑗Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴)
131	128, 130	nfmpt 5255	. . . . . . . 8 ⊢ Ⅎ𝑗(𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))
132	127, 131	nfeq 2917	. . . . . . 7 ⊢ Ⅎ𝑗(𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))
133	126, 132	nfan 1903	. . . . . 6 ⊢ Ⅎ𝑗(((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴)))
134		nfcsb1v 3918	. . . . . 6 ⊢ Ⅎ𝑖⦋𝑐 / 𝑖⦌𝐴
135		nfcsb1v 3918	. . . . . 6 ⊢ Ⅎ𝑗⦋𝑐 / 𝑗⦌𝐶
136	83	ad2antrr 725	. . . . . . . 8 ⊢ ((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) → 𝜑)
137	136	3ad2ant1 1134	. . . . . . 7 ⊢ (((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ 𝑖 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) → 𝜑)
138		simp2 1138	. . . . . . 7 ⊢ (((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ 𝑖 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) → 𝑖 ∈ 𝐼)
139		simp3 1139	. . . . . . 7 ⊢ (((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ 𝑖 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) → 𝑥 ∈ 𝑋)
140		dvmptfprod.a	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) → 𝐴 ∈ ℂ)
141	137, 138, 139, 140	syl3anc 1372	. . . . . 6 ⊢ (((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ 𝑖 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) → 𝐴 ∈ ℂ)
142	136, 1	syl 17	. . . . . . 7 ⊢ ((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) → 𝐼 ∈ Fin)
143	87	ad2antrr 725	. . . . . . 7 ⊢ ((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) → 𝑏 ⊆ 𝐼)
144		ssfi 9170	. . . . . . 7 ⊢ ((𝐼 ∈ Fin ∧ 𝑏 ⊆ 𝐼) → 𝑏 ∈ Fin)
145	142, 143, 144	syl2anc 585	. . . . . 6 ⊢ ((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) → 𝑏 ∈ Fin)
146		vex 3479	. . . . . . 7 ⊢ 𝑐 ∈ V
147	146	a1i 11	. . . . . 6 ⊢ ((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) → 𝑐 ∈ V)
148		simplr 768	. . . . . 6 ⊢ ((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) → ¬ 𝑐 ∈ 𝑏)
149		simpllr 775	. . . . . 6 ⊢ ((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) → (𝑏 ∪ {𝑐}) ⊆ 𝐼)
150	66	ad3antrrr 729	. . . . . 6 ⊢ ((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) → 𝑆 ∈ {ℝ, ℂ})
151	136	ad2antrr 725	. . . . . . 7 ⊢ ((((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ 𝑥 ∈ 𝑋) ∧ 𝑗 ∈ 𝑏) → 𝜑)
152	143	ad2antrr 725	. . . . . . . 8 ⊢ ((((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ 𝑥 ∈ 𝑋) ∧ 𝑗 ∈ 𝑏) → 𝑏 ⊆ 𝐼)
153		simpr 486	. . . . . . . 8 ⊢ ((((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ 𝑥 ∈ 𝑋) ∧ 𝑗 ∈ 𝑏) → 𝑗 ∈ 𝑏)
154	152, 153	sseldd 3983	. . . . . . 7 ⊢ ((((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ 𝑥 ∈ 𝑋) ∧ 𝑗 ∈ 𝑏) → 𝑗 ∈ 𝐼)
155		simplr 768	. . . . . . 7 ⊢ ((((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ 𝑥 ∈ 𝑋) ∧ 𝑗 ∈ 𝑏) → 𝑥 ∈ 𝑋)
156		nfv 1918	. . . . . . . . . 10 ⊢ Ⅎ𝑖 𝑗 ∈ 𝐼
157		nfv 1918	. . . . . . . . . 10 ⊢ Ⅎ𝑖 𝑥 ∈ 𝑋
158	101, 156, 157	nf3an 1905	. . . . . . . . 9 ⊢ Ⅎ𝑖(𝜑 ∧ 𝑗 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋)
159		nfv 1918	. . . . . . . . 9 ⊢ Ⅎ𝑖 𝐶 ∈ ℂ
160	158, 159	nfim 1900	. . . . . . . 8 ⊢ Ⅎ𝑖((𝜑 ∧ 𝑗 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) → 𝐶 ∈ ℂ)
161		eleq1w 2817	. . . . . . . . . 10 ⊢ (𝑖 = 𝑗 → (𝑖 ∈ 𝐼 ↔ 𝑗 ∈ 𝐼))
162	161	3anbi2d 1442	. . . . . . . . 9 ⊢ (𝑖 = 𝑗 → ((𝜑 ∧ 𝑖 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) ↔ (𝜑 ∧ 𝑗 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋)))
163		dvmptfprod.bc	. . . . . . . . . 10 ⊢ (𝑖 = 𝑗 → 𝐵 = 𝐶)
164	163	eleq1d 2819	. . . . . . . . 9 ⊢ (𝑖 = 𝑗 → (𝐵 ∈ ℂ ↔ 𝐶 ∈ ℂ))
165	162, 164	imbi12d 345	. . . . . . . 8 ⊢ (𝑖 = 𝑗 → (((𝜑 ∧ 𝑖 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) → 𝐵 ∈ ℂ) ↔ ((𝜑 ∧ 𝑗 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) → 𝐶 ∈ ℂ)))
166		dvmptfprod.b	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) → 𝐵 ∈ ℂ)
167	160, 165, 166	chvarfv 2234	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) → 𝐶 ∈ ℂ)
168	151, 154, 155, 167	syl3anc 1372	. . . . . 6 ⊢ ((((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ 𝑥 ∈ 𝑋) ∧ 𝑗 ∈ 𝑏) → 𝐶 ∈ ℂ)
169		simpr 486	. . . . . 6 ⊢ ((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴)))
170	83	adantr 482	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ 𝑥 ∈ 𝑋) → 𝜑)
171		id 22	. . . . . . . . . . 11 ⊢ ((𝑏 ∪ {𝑐}) ⊆ 𝐼 → (𝑏 ∪ {𝑐}) ⊆ 𝐼)
172	146	snid 4664	. . . . . . . . . . . . 13 ⊢ 𝑐 ∈ {𝑐}
173		elun2 4177	. . . . . . . . . . . . 13 ⊢ (𝑐 ∈ {𝑐} → 𝑐 ∈ (𝑏 ∪ {𝑐}))
174	172, 173	ax-mp 5	. . . . . . . . . . . 12 ⊢ 𝑐 ∈ (𝑏 ∪ {𝑐})
175	174	a1i 11	. . . . . . . . . . 11 ⊢ ((𝑏 ∪ {𝑐}) ⊆ 𝐼 → 𝑐 ∈ (𝑏 ∪ {𝑐}))
176	171, 175	sseldd 3983	. . . . . . . . . 10 ⊢ ((𝑏 ∪ {𝑐}) ⊆ 𝐼 → 𝑐 ∈ 𝐼)
177	176	ad2antlr 726	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ 𝑥 ∈ 𝑋) → 𝑐 ∈ 𝐼)
178		simpr 486	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ 𝑥 ∈ 𝑋) → 𝑥 ∈ 𝑋)
179		nfv 1918	. . . . . . . . . . . 12 ⊢ Ⅎ𝑗 𝑐 ∈ 𝐼
180		nfv 1918	. . . . . . . . . . . 12 ⊢ Ⅎ𝑗 𝑥 ∈ 𝑋
181	122, 179, 180	nf3an 1905	. . . . . . . . . . 11 ⊢ Ⅎ𝑗(𝜑 ∧ 𝑐 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋)
182		nfcv 2904	. . . . . . . . . . . 12 ⊢ Ⅎ𝑗ℂ
183	135, 182	nfel 2918	. . . . . . . . . . 11 ⊢ Ⅎ𝑗⦋𝑐 / 𝑗⦌𝐶 ∈ ℂ
184	181, 183	nfim 1900	. . . . . . . . . 10 ⊢ Ⅎ𝑗((𝜑 ∧ 𝑐 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) → ⦋𝑐 / 𝑗⦌𝐶 ∈ ℂ)
185		eleq1w 2817	. . . . . . . . . . . 12 ⊢ (𝑗 = 𝑐 → (𝑗 ∈ 𝐼 ↔ 𝑐 ∈ 𝐼))
186	185	3anbi2d 1442	. . . . . . . . . . 11 ⊢ (𝑗 = 𝑐 → ((𝜑 ∧ 𝑗 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) ↔ (𝜑 ∧ 𝑐 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋)))
187		csbeq1a 3907	. . . . . . . . . . . 12 ⊢ (𝑗 = 𝑐 → 𝐶 = ⦋𝑐 / 𝑗⦌𝐶)
188	187	eleq1d 2819	. . . . . . . . . . 11 ⊢ (𝑗 = 𝑐 → (𝐶 ∈ ℂ ↔ ⦋𝑐 / 𝑗⦌𝐶 ∈ ℂ))
189	186, 188	imbi12d 345	. . . . . . . . . 10 ⊢ (𝑗 = 𝑐 → (((𝜑 ∧ 𝑗 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) → 𝐶 ∈ ℂ) ↔ ((𝜑 ∧ 𝑐 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) → ⦋𝑐 / 𝑗⦌𝐶 ∈ ℂ)))
190	184, 189, 167	chvarfv 2234	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑐 ∈ 𝐼 ∧ 𝑥 ∈ 𝑋) → ⦋𝑐 / 𝑗⦌𝐶 ∈ ℂ)
191	170, 177, 178, 190	syl3anc 1372	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ 𝑥 ∈ 𝑋) → ⦋𝑐 / 𝑗⦌𝐶 ∈ ℂ)
192	191	adantlr 714	. . . . . . 7 ⊢ ((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ 𝑥 ∈ 𝑋) → ⦋𝑐 / 𝑗⦌𝐶 ∈ ℂ)
193	192	adantlr 714	. . . . . 6 ⊢ (((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ 𝑥 ∈ 𝑋) → ⦋𝑐 / 𝑗⦌𝐶 ∈ ℂ)
194	122, 179	nfan 1903	. . . . . . . . . 10 ⊢ Ⅎ𝑗(𝜑 ∧ 𝑐 ∈ 𝐼)
195		nfcv 2904	. . . . . . . . . . 11 ⊢ Ⅎ𝑗(𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑖⦌𝐴))
196	128, 135	nfmpt 5255	. . . . . . . . . . 11 ⊢ Ⅎ𝑗(𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑗⦌𝐶)
197	195, 196	nfeq 2917	. . . . . . . . . 10 ⊢ Ⅎ𝑗(𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑖⦌𝐴)) = (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑗⦌𝐶)
198	194, 197	nfim 1900	. . . . . . . . 9 ⊢ Ⅎ𝑗((𝜑 ∧ 𝑐 ∈ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑖⦌𝐴)) = (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑗⦌𝐶))
199	185	anbi2d 630	. . . . . . . . . 10 ⊢ (𝑗 = 𝑐 → ((𝜑 ∧ 𝑗 ∈ 𝐼) ↔ (𝜑 ∧ 𝑐 ∈ 𝐼)))
200		csbeq1a 3907	. . . . . . . . . . . . . 14 ⊢ (𝑗 = 𝑐 → ⦋𝑗 / 𝑖⦌𝐴 = ⦋𝑐 / 𝑗⦌⦋𝑗 / 𝑖⦌𝐴)
201		csbcow 3908	. . . . . . . . . . . . . . 15 ⊢ ⦋𝑐 / 𝑗⦌⦋𝑗 / 𝑖⦌𝐴 = ⦋𝑐 / 𝑖⦌𝐴
202	201	a1i 11	. . . . . . . . . . . . . 14 ⊢ (𝑗 = 𝑐 → ⦋𝑐 / 𝑗⦌⦋𝑗 / 𝑖⦌𝐴 = ⦋𝑐 / 𝑖⦌𝐴)
203	200, 202	eqtrd 2773	. . . . . . . . . . . . 13 ⊢ (𝑗 = 𝑐 → ⦋𝑗 / 𝑖⦌𝐴 = ⦋𝑐 / 𝑖⦌𝐴)
204	203	mpteq2dv 5250	. . . . . . . . . . . 12 ⊢ (𝑗 = 𝑐 → (𝑥 ∈ 𝑋 ↦ ⦋𝑗 / 𝑖⦌𝐴) = (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑖⦌𝐴))
205	204	oveq2d 7422	. . . . . . . . . . 11 ⊢ (𝑗 = 𝑐 → (𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑗 / 𝑖⦌𝐴)) = (𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑖⦌𝐴)))
206	187	mpteq2dv 5250	. . . . . . . . . . 11 ⊢ (𝑗 = 𝑐 → (𝑥 ∈ 𝑋 ↦ 𝐶) = (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑗⦌𝐶))
207	205, 206	eqeq12d 2749	. . . . . . . . . 10 ⊢ (𝑗 = 𝑐 → ((𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑗 / 𝑖⦌𝐴)) = (𝑥 ∈ 𝑋 ↦ 𝐶) ↔ (𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑖⦌𝐴)) = (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑗⦌𝐶)))
208	199, 207	imbi12d 345	. . . . . . . . 9 ⊢ (𝑗 = 𝑐 → (((𝜑 ∧ 𝑗 ∈ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑗 / 𝑖⦌𝐴)) = (𝑥 ∈ 𝑋 ↦ 𝐶)) ↔ ((𝜑 ∧ 𝑐 ∈ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑖⦌𝐴)) = (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑗⦌𝐶))))
209	101, 156	nfan 1903	. . . . . . . . . . 11 ⊢ Ⅎ𝑖(𝜑 ∧ 𝑗 ∈ 𝐼)
210		nfcsb1v 3918	. . . . . . . . . . . . . 14 ⊢ Ⅎ𝑖⦋𝑗 / 𝑖⦌𝐴
211	108, 210	nfmpt 5255	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑖(𝑥 ∈ 𝑋 ↦ ⦋𝑗 / 𝑖⦌𝐴)
212	106, 107, 211	nfov 7436	. . . . . . . . . . . 12 ⊢ Ⅎ𝑖(𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑗 / 𝑖⦌𝐴))
213		nfcv 2904	. . . . . . . . . . . 12 ⊢ Ⅎ𝑖(𝑥 ∈ 𝑋 ↦ 𝐶)
214	212, 213	nfeq 2917	. . . . . . . . . . 11 ⊢ Ⅎ𝑖(𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑗 / 𝑖⦌𝐴)) = (𝑥 ∈ 𝑋 ↦ 𝐶)
215	209, 214	nfim 1900	. . . . . . . . . 10 ⊢ Ⅎ𝑖((𝜑 ∧ 𝑗 ∈ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑗 / 𝑖⦌𝐴)) = (𝑥 ∈ 𝑋 ↦ 𝐶))
216	161	anbi2d 630	. . . . . . . . . . 11 ⊢ (𝑖 = 𝑗 → ((𝜑 ∧ 𝑖 ∈ 𝐼) ↔ (𝜑 ∧ 𝑗 ∈ 𝐼)))
217		csbeq1a 3907	. . . . . . . . . . . . . 14 ⊢ (𝑖 = 𝑗 → 𝐴 = ⦋𝑗 / 𝑖⦌𝐴)
218	217	mpteq2dv 5250	. . . . . . . . . . . . 13 ⊢ (𝑖 = 𝑗 → (𝑥 ∈ 𝑋 ↦ 𝐴) = (𝑥 ∈ 𝑋 ↦ ⦋𝑗 / 𝑖⦌𝐴))
219	218	oveq2d 7422	. . . . . . . . . . . 12 ⊢ (𝑖 = 𝑗 → (𝑆 D (𝑥 ∈ 𝑋 ↦ 𝐴)) = (𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑗 / 𝑖⦌𝐴)))
220	163	idi 1	. . . . . . . . . . . . 13 ⊢ (𝑖 = 𝑗 → 𝐵 = 𝐶)
221	220	mpteq2dv 5250	. . . . . . . . . . . 12 ⊢ (𝑖 = 𝑗 → (𝑥 ∈ 𝑋 ↦ 𝐵) = (𝑥 ∈ 𝑋 ↦ 𝐶))
222	219, 221	eqeq12d 2749	. . . . . . . . . . 11 ⊢ (𝑖 = 𝑗 → ((𝑆 D (𝑥 ∈ 𝑋 ↦ 𝐴)) = (𝑥 ∈ 𝑋 ↦ 𝐵) ↔ (𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑗 / 𝑖⦌𝐴)) = (𝑥 ∈ 𝑋 ↦ 𝐶)))
223	216, 222	imbi12d 345	. . . . . . . . . 10 ⊢ (𝑖 = 𝑗 → (((𝜑 ∧ 𝑖 ∈ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ 𝐴)) = (𝑥 ∈ 𝑋 ↦ 𝐵)) ↔ ((𝜑 ∧ 𝑗 ∈ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑗 / 𝑖⦌𝐴)) = (𝑥 ∈ 𝑋 ↦ 𝐶))))
224		dvmptfprod.d	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ 𝐴)) = (𝑥 ∈ 𝑋 ↦ 𝐵))
225	215, 223, 224	chvarfv 2234	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑗 / 𝑖⦌𝐴)) = (𝑥 ∈ 𝑋 ↦ 𝐶))
226	198, 208, 225	chvarfv 2234	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑐 ∈ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑖⦌𝐴)) = (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑗⦌𝐶))
227	176, 226	sylan2 594	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑖⦌𝐴)) = (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑗⦌𝐶))
228	227	ad2antrr 725	. . . . . 6 ⊢ ((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑖⦌𝐴)) = (𝑥 ∈ 𝑋 ↦ ⦋𝑐 / 𝑗⦌𝐶))
229		csbeq1a 3907	. . . . . 6 ⊢ (𝑖 = 𝑐 → 𝐴 = ⦋𝑐 / 𝑖⦌𝐴)
230	100, 121, 133, 134, 135, 141, 145, 147, 148, 149, 150, 168, 169, 193, 228, 229, 187	dvmptfprodlem 44647	. . . . 5 ⊢ ((((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) ∧ ¬ 𝑐 ∈ 𝑏) ∧ (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ (𝑏 ∪ {𝑐})𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ (𝑏 ∪ {𝑐})(𝐶 · ∏𝑖 ∈ ((𝑏 ∪ {𝑐}) ∖ {𝑗})𝐴)))
231	81, 82, 92, 230	syl21anc 837	. . . 4 ⊢ (((𝑏 ∈ Fin ∧ ¬ 𝑐 ∈ 𝑏) ∧ ((𝜑 ∧ 𝑏 ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) ∧ (𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼)) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ (𝑏 ∪ {𝑐})𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ (𝑏 ∪ {𝑐})(𝐶 · ∏𝑖 ∈ ((𝑏 ∪ {𝑐}) ∖ {𝑗})𝐴)))
232	231	3exp 1120	. . 3 ⊢ ((𝑏 ∈ Fin ∧ ¬ 𝑐 ∈ 𝑏) → (((𝜑 ∧ 𝑏 ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝑏 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝑏 (𝐶 · ∏𝑖 ∈ (𝑏 ∖ {𝑗})𝐴))) → ((𝜑 ∧ (𝑏 ∪ {𝑐}) ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ (𝑏 ∪ {𝑐})𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ (𝑏 ∪ {𝑐})(𝐶 · ∏𝑖 ∈ ((𝑏 ∪ {𝑐}) ∖ {𝑗})𝐴)))))
233	17, 31, 45, 61, 80, 232	findcard2s 9162	. 2 ⊢ (𝐼 ∈ Fin → ((𝜑 ∧ 𝐼 ⊆ 𝐼) → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝐼 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝐼 (𝐶 · ∏𝑖 ∈ (𝐼 ∖ {𝑗})𝐴))))
234	1, 3, 233	sylc 65	1 ⊢ (𝜑 → (𝑆 D (𝑥 ∈ 𝑋 ↦ ∏𝑖 ∈ 𝐼 𝐴)) = (𝑥 ∈ 𝑋 ↦ Σ𝑗 ∈ 𝐼 (𝐶 · ∏𝑖 ∈ (𝐼 ∖ {𝑗})𝐴)))

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 397   ∧ w3a 1088   = wceq 1542  Ⅎwnf 1786   ∈ wcel 2107  Vcvv 3475  ⦋csb 3893   ∖ cdif 3945   ∪ cun 3946   ⊆ wss 3948  ∅c0 4322  {csn 4628  {cpr 4630   ↦ cmpt 5231  ‘cfv 6541  (class class class)co 7406  Fincfn 8936  ℂcc 11105  ℝcr 11106  0cc0 11107  1c1 11108   · cmul 11112  Σcsu 15629  ∏cprod 15846   ↾_t crest 17363  TopOpenctopn 17364  ℂ_fldccnfld 20937   D cdv 25372

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2155  ax-12 2172  ax-ext 2704  ax-rep 5285  ax-sep 5299  ax-nul 5306  ax-pow 5363  ax-pr 5427  ax-un 7722  ax-inf2 9633  ax-cnex 11163  ax-resscn 11164  ax-1cn 11165  ax-icn 11166  ax-addcl 11167  ax-addrcl 11168  ax-mulcl 11169  ax-mulrcl 11170  ax-mulcom 11171  ax-addass 11172  ax-mulass 11173  ax-distr 11174  ax-i2m1 11175  ax-1ne0 11176  ax-1rid 11177  ax-rnegex 11178  ax-rrecex 11179  ax-cnre 11180  ax-pre-lttri 11181  ax-pre-lttrn 11182  ax-pre-ltadd 11183  ax-pre-mulgt0 11184  ax-pre-sup 11185  ax-addf 11186  ax-mulf 11187

This theorem depends on definitions:  df-bi 206  df-an 398  df-or 847  df-3or 1089  df-3an 1090  df-tru 1545  df-fal 1555  df-ex 1783  df-nf 1787  df-sb 2069  df-mo 2535  df-eu 2564  df-clab 2711  df-cleq 2725  df-clel 2811  df-nfc 2886  df-ne 2942  df-nel 3048  df-ral 3063  df-rex 3072  df-rmo 3377  df-reu 3378  df-rab 3434  df-v 3477  df-sbc 3778  df-csb 3894  df-dif 3951  df-un 3953  df-in 3955  df-ss 3965  df-pss 3967  df-nul 4323  df-if 4529  df-pw 4604  df-sn 4629  df-pr 4631  df-tp 4633  df-op 4635  df-uni 4909  df-int 4951  df-iun 4999  df-iin 5000  df-br 5149  df-opab 5211  df-mpt 5232  df-tr 5266  df-id 5574  df-eprel 5580  df-po 5588  df-so 5589  df-fr 5631  df-se 5632  df-we 5633  df-xp 5682  df-rel 5683  df-cnv 5684  df-co 5685  df-dm 5686  df-rn 5687  df-res 5688  df-ima 5689  df-pred 6298  df-ord 6365  df-on 6366  df-lim 6367  df-suc 6368  df-iota 6493  df-fun 6543  df-fn 6544  df-f 6545  df-f1 6546  df-fo 6547  df-f1o 6548  df-fv 6549  df-isom 6550  df-riota 7362  df-ov 7409  df-oprab 7410  df-mpo 7411  df-of 7667  df-om 7853  df-1st 7972  df-2nd 7973  df-supp 8144  df-frecs 8263  df-wrecs 8294  df-recs 8368  df-rdg 8407  df-1o 8463  df-2o 8464  df-er 8700  df-map 8819  df-pm 8820  df-ixp 8889  df-en 8937  df-dom 8938  df-sdom 8939  df-fin 8940  df-fsupp 9359  df-fi 9403  df-sup 9434  df-inf 9435  df-oi 9502  df-card 9931  df-pnf 11247  df-mnf 11248  df-xr 11249  df-ltxr 11250  df-le 11251  df-sub 11443  df-neg 11444  df-div 11869  df-nn 12210  df-2 12272  df-3 12273  df-4 12274  df-5 12275  df-6 12276  df-7 12277  df-8 12278  df-9 12279  df-n0 12470  df-z 12556  df-dec 12675  df-uz 12820  df-q 12930  df-rp 12972  df-xneg 13089  df-xadd 13090  df-xmul 13091  df-icc 13328  df-fz 13482  df-fzo 13625  df-seq 13964  df-exp 14025  df-hash 14288  df-cj 15043  df-re 15044  df-im 15045  df-sqrt 15179  df-abs 15180  df-clim 15429  df-sum 15630  df-prod 15847  df-struct 17077  df-sets 17094  df-slot 17112  df-ndx 17124  df-base 17142  df-ress 17171  df-plusg 17207  df-mulr 17208  df-starv 17209  df-sca 17210  df-vsca 17211  df-ip 17212  df-tset 17213  df-ple 17214  df-ds 17216  df-unif 17217  df-hom 17218  df-cco 17219  df-rest 17365  df-topn 17366  df-0g 17384  df-gsum 17385  df-topgen 17386  df-pt 17387  df-prds 17390  df-xrs 17445  df-qtop 17450  df-imas 17451  df-xps 17453  df-mre 17527  df-mrc 17528  df-acs 17530  df-mgm 18558  df-sgrp 18607  df-mnd 18623  df-submnd 18669  df-mulg 18946  df-cntz 19176  df-cmn 19645  df-psmet 20929  df-xmet 20930  df-met 20931  df-bl 20932  df-mopn 20933  df-fbas 20934  df-fg 20935  df-cnfld 20938  df-top 22388  df-topon 22405  df-topsp 22427  df-bases 22441  df-cld 22515  df-ntr 22516  df-cls 22517  df-nei 22594  df-lp 22632  df-perf 22633  df-cn 22723  df-cnp 22724  df-haus 22811  df-tx 23058  df-hmeo 23251  df-fil 23342  df-fm 23434  df-flim 23435  df-flf 23436  df-xms 23818  df-ms 23819  df-tms 23820  df-cncf 24386  df-limc 25375  df-dv 25376

This theorem is referenced by: (None)