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Theorem srgbinomlem4 20045

Description: Lemma 4 for srgbinomlem 20046. (Contributed by AV, 24-Aug-2019.) (Proof shortened by AV, 19-Nov-2019.)

**Hypotheses**
Ref	Expression
srgbinom.s	⊢ 𝑆 = (Base‘𝑅)
srgbinom.m	⊢ × = (._r‘𝑅)
srgbinom.t	⊢ · = (._g‘𝑅)
srgbinom.a	⊢ + = (+_g‘𝑅)
srgbinom.g	⊢ 𝐺 = (mulGrp‘𝑅)
srgbinom.e	⊢ ↑ = (._g‘𝐺)
srgbinomlem.r	⊢ (𝜑 → 𝑅 ∈ SRing)
srgbinomlem.a	⊢ (𝜑 → 𝐴 ∈ 𝑆)
srgbinomlem.b	⊢ (𝜑 → 𝐵 ∈ 𝑆)
srgbinomlem.c	⊢ (𝜑 → (𝐴 × 𝐵) = (𝐵 × 𝐴))
srgbinomlem.n	⊢ (𝜑 → 𝑁 ∈ ℕ₀)
srgbinomlem.i	⊢ (𝜓 → (𝑁 ↑ (𝐴 + 𝐵)) = (𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))

**Assertion**
Ref	Expression
srgbinomlem4	⊢ ((𝜑 ∧ 𝜓) → ((𝑁 ↑ (𝐴 + 𝐵)) × 𝐵) = (𝑅 Σ_g (𝑘 ∈ (0...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))

Distinct variable groups: 𝐴,𝑘 𝐵,𝑘 𝑘,𝑁 𝑅,𝑘 𝑆,𝑘 · ,𝑘 × ,𝑘 ↑ ,𝑘 𝜑,𝑘 Allowed substitution hints: 𝜓(𝑘) + (𝑘) 𝐺(𝑘)

Proof of Theorem srgbinomlem4 Dummy variable 𝑗 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		srgbinomlem.i	. . 3 ⊢ (𝜓 → (𝑁 ↑ (𝐴 + 𝐵)) = (𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))
2	1	oveq1d 7420	. 2 ⊢ (𝜓 → ((𝑁 ↑ (𝐴 + 𝐵)) × 𝐵) = ((𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) × 𝐵))
3		srgbinom.s	. . . 4 ⊢ 𝑆 = (Base‘𝑅)
4		eqid 2732	. . . 4 ⊢ (0_g‘𝑅) = (0_g‘𝑅)
5		srgbinom.a	. . . 4 ⊢ + = (+_g‘𝑅)
6		srgbinom.m	. . . 4 ⊢ × = (._r‘𝑅)
7		srgbinomlem.r	. . . 4 ⊢ (𝜑 → 𝑅 ∈ SRing)
8		ovexd 7440	. . . 4 ⊢ (𝜑 → (0...𝑁) ∈ V)
9		srgbinomlem.b	. . . 4 ⊢ (𝜑 → 𝐵 ∈ 𝑆)
10		simpl 483	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → 𝜑)
11		srgbinomlem.n	. . . . . 6 ⊢ (𝜑 → 𝑁 ∈ ℕ₀)
12		elfzelz 13497	. . . . . 6 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ ℤ)
13		bccl 14278	. . . . . 6 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → (𝑁C𝑘) ∈ ℕ₀)
14	11, 12, 13	syl2an 596	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → (𝑁C𝑘) ∈ ℕ₀)
15		fznn0sub 13529	. . . . . 6 ⊢ (𝑘 ∈ (0...𝑁) → (𝑁 − 𝑘) ∈ ℕ₀)
16	15	adantl 482	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → (𝑁 − 𝑘) ∈ ℕ₀)
17		elfznn0 13590	. . . . . 6 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ ℕ₀)
18	17	adantl 482	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → 𝑘 ∈ ℕ₀)
19		srgbinom.t	. . . . . 6 ⊢ · = (._g‘𝑅)
20		srgbinom.g	. . . . . 6 ⊢ 𝐺 = (mulGrp‘𝑅)
21		srgbinom.e	. . . . . 6 ⊢ ↑ = (._g‘𝐺)
22		srgbinomlem.a	. . . . . 6 ⊢ (𝜑 → 𝐴 ∈ 𝑆)
23		srgbinomlem.c	. . . . . 6 ⊢ (𝜑 → (𝐴 × 𝐵) = (𝐵 × 𝐴))
24	3, 6, 19, 5, 20, 21, 7, 22, 9, 23, 11	srgbinomlem2 20043	. . . . 5 ⊢ ((𝜑 ∧ ((𝑁C𝑘) ∈ ℕ₀ ∧ (𝑁 − 𝑘) ∈ ℕ₀ ∧ 𝑘 ∈ ℕ₀)) → ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ 𝑆)
25	10, 14, 16, 18, 24	syl13anc 1372	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ 𝑆)
26		eqid 2732	. . . . 5 ⊢ (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))) = (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))
27		fzfid 13934	. . . . 5 ⊢ (𝜑 → (0...𝑁) ∈ Fin)
28		ovexd 7440	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ V)
29		fvexd 6903	. . . . 5 ⊢ (𝜑 → (0_g‘𝑅) ∈ V)
30	26, 27, 28, 29	fsuppmptdm 9370	. . . 4 ⊢ (𝜑 → (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))) finSupp (0_g‘𝑅))
31	3, 4, 5, 6, 7, 8, 9, 25, 30	srgsummulcr 20039	. . 3 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ (((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) × 𝐵))) = ((𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) × 𝐵))
32		srgcmn 20005	. . . . . 6 ⊢ (𝑅 ∈ SRing → 𝑅 ∈ CMnd)
33	7, 32	syl 17	. . . . 5 ⊢ (𝜑 → 𝑅 ∈ CMnd)
34		1z 12588	. . . . . 6 ⊢ 1 ∈ ℤ
35	34	a1i 11	. . . . 5 ⊢ (𝜑 → 1 ∈ ℤ)
36		0zd 12566	. . . . 5 ⊢ (𝜑 → 0 ∈ ℤ)
37	11	nn0zd 12580	. . . . 5 ⊢ (𝜑 → 𝑁 ∈ ℤ)
38	7	adantr 481	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → 𝑅 ∈ SRing)
39	9	adantr 481	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → 𝐵 ∈ 𝑆)
40	3, 6	srgcl 20009	. . . . . 6 ⊢ ((𝑅 ∈ SRing ∧ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → (((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) × 𝐵) ∈ 𝑆)
41	38, 25, 39, 40	syl3anc 1371	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → (((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) × 𝐵) ∈ 𝑆)
42		oveq2 7413	. . . . . . 7 ⊢ (𝑘 = (𝑗 − 1) → (𝑁C𝑘) = (𝑁C(𝑗 − 1)))
43		oveq2 7413	. . . . . . . . 9 ⊢ (𝑘 = (𝑗 − 1) → (𝑁 − 𝑘) = (𝑁 − (𝑗 − 1)))
44	43	oveq1d 7420	. . . . . . . 8 ⊢ (𝑘 = (𝑗 − 1) → ((𝑁 − 𝑘) ↑ 𝐴) = ((𝑁 − (𝑗 − 1)) ↑ 𝐴))
45		oveq1 7412	. . . . . . . 8 ⊢ (𝑘 = (𝑗 − 1) → (𝑘 ↑ 𝐵) = ((𝑗 − 1) ↑ 𝐵))
46	44, 45	oveq12d 7423	. . . . . . 7 ⊢ (𝑘 = (𝑗 − 1) → (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)) = (((𝑁 − (𝑗 − 1)) ↑ 𝐴) × ((𝑗 − 1) ↑ 𝐵)))
47	42, 46	oveq12d 7423	. . . . . 6 ⊢ (𝑘 = (𝑗 − 1) → ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) = ((𝑁C(𝑗 − 1)) · (((𝑁 − (𝑗 − 1)) ↑ 𝐴) × ((𝑗 − 1) ↑ 𝐵))))
48	47	oveq1d 7420	. . . . 5 ⊢ (𝑘 = (𝑗 − 1) → (((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) × 𝐵) = (((𝑁C(𝑗 − 1)) · (((𝑁 − (𝑗 − 1)) ↑ 𝐴) × ((𝑗 − 1) ↑ 𝐵))) × 𝐵))
49	3, 4, 33, 35, 36, 37, 41, 48	gsummptshft 19798	. . . 4 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ (((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) × 𝐵))) = (𝑅 Σ_g (𝑗 ∈ ((0 + 1)...(𝑁 + 1)) ↦ (((𝑁C(𝑗 − 1)) · (((𝑁 − (𝑗 − 1)) ↑ 𝐴) × ((𝑗 − 1) ↑ 𝐵))) × 𝐵))))
50	11	nn0cnd 12530	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑁 ∈ ℂ)
51	50	adantr 481	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → 𝑁 ∈ ℂ)
52		elfzelz 13497	. . . . . . . . . . . . . 14 ⊢ (𝑗 ∈ ((0 + 1)...(𝑁 + 1)) → 𝑗 ∈ ℤ)
53	52	adantl 482	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → 𝑗 ∈ ℤ)
54	53	zcnd 12663	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → 𝑗 ∈ ℂ)
55		1cnd 11205	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → 1 ∈ ℂ)
56	51, 54, 55	subsub3d 11597	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → (𝑁 − (𝑗 − 1)) = ((𝑁 + 1) − 𝑗))
57	56	oveq1d 7420	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → ((𝑁 − (𝑗 − 1)) ↑ 𝐴) = (((𝑁 + 1) − 𝑗) ↑ 𝐴))
58	57	oveq1d 7420	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → (((𝑁 − (𝑗 − 1)) ↑ 𝐴) × ((𝑗 − 1) ↑ 𝐵)) = ((((𝑁 + 1) − 𝑗) ↑ 𝐴) × ((𝑗 − 1) ↑ 𝐵)))
59	58	oveq2d 7421	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → ((𝑁C(𝑗 − 1)) · (((𝑁 − (𝑗 − 1)) ↑ 𝐴) × ((𝑗 − 1) ↑ 𝐵))) = ((𝑁C(𝑗 − 1)) · ((((𝑁 + 1) − 𝑗) ↑ 𝐴) × ((𝑗 − 1) ↑ 𝐵))))
60	59	oveq1d 7420	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → (((𝑁C(𝑗 − 1)) · (((𝑁 − (𝑗 − 1)) ↑ 𝐴) × ((𝑗 − 1) ↑ 𝐵))) × 𝐵) = (((𝑁C(𝑗 − 1)) · ((((𝑁 + 1) − 𝑗) ↑ 𝐴) × ((𝑗 − 1) ↑ 𝐵))) × 𝐵))
61	7	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → 𝑅 ∈ SRing)
62		peano2zm 12601	. . . . . . . . . . . 12 ⊢ (𝑗 ∈ ℤ → (𝑗 − 1) ∈ ℤ)
63	52, 62	syl 17	. . . . . . . . . . 11 ⊢ (𝑗 ∈ ((0 + 1)...(𝑁 + 1)) → (𝑗 − 1) ∈ ℤ)
64		bccl 14278	. . . . . . . . . . 11 ⊢ ((𝑁 ∈ ℕ₀ ∧ (𝑗 − 1) ∈ ℤ) → (𝑁C(𝑗 − 1)) ∈ ℕ₀)
65	11, 63, 64	syl2an 596	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → (𝑁C(𝑗 − 1)) ∈ ℕ₀)
66	20, 3	mgpbas 19987	. . . . . . . . . . 11 ⊢ 𝑆 = (Base‘𝐺)
67	20	srgmgp 20007	. . . . . . . . . . . . 13 ⊢ (𝑅 ∈ SRing → 𝐺 ∈ Mnd)
68	7, 67	syl 17	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐺 ∈ Mnd)
69	68	adantr 481	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → 𝐺 ∈ Mnd)
70		0p1e1 12330	. . . . . . . . . . . . . . 15 ⊢ (0 + 1) = 1
71	70	oveq1i 7415	. . . . . . . . . . . . . 14 ⊢ ((0 + 1)...(𝑁 + 1)) = (1...(𝑁 + 1))
72	71	eleq2i 2825	. . . . . . . . . . . . 13 ⊢ (𝑗 ∈ ((0 + 1)...(𝑁 + 1)) ↔ 𝑗 ∈ (1...(𝑁 + 1)))
73		fznn0sub 13529	. . . . . . . . . . . . . 14 ⊢ (𝑗 ∈ (1...(𝑁 + 1)) → ((𝑁 + 1) − 𝑗) ∈ ℕ₀)
74	73	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑗 ∈ (1...(𝑁 + 1)) → ((𝑁 + 1) − 𝑗) ∈ ℕ₀))
75	72, 74	biimtrid 241	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝑗 ∈ ((0 + 1)...(𝑁 + 1)) → ((𝑁 + 1) − 𝑗) ∈ ℕ₀))
76	75	imp 407	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → ((𝑁 + 1) − 𝑗) ∈ ℕ₀)
77	22	adantr 481	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → 𝐴 ∈ 𝑆)
78	66, 21, 69, 76, 77	mulgnn0cld 18969	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → (((𝑁 + 1) − 𝑗) ↑ 𝐴) ∈ 𝑆)
79		elfznn 13526	. . . . . . . . . . . . . 14 ⊢ (𝑗 ∈ (1...(𝑁 + 1)) → 𝑗 ∈ ℕ)
80		nnm1nn0 12509	. . . . . . . . . . . . . 14 ⊢ (𝑗 ∈ ℕ → (𝑗 − 1) ∈ ℕ₀)
81	79, 80	syl 17	. . . . . . . . . . . . 13 ⊢ (𝑗 ∈ (1...(𝑁 + 1)) → (𝑗 − 1) ∈ ℕ₀)
82	72, 81	sylbi 216	. . . . . . . . . . . 12 ⊢ (𝑗 ∈ ((0 + 1)...(𝑁 + 1)) → (𝑗 − 1) ∈ ℕ₀)
83	82	adantl 482	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → (𝑗 − 1) ∈ ℕ₀)
84	9	adantr 481	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → 𝐵 ∈ 𝑆)
85	66, 21, 69, 83, 84	mulgnn0cld 18969	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → ((𝑗 − 1) ↑ 𝐵) ∈ 𝑆)
86	3, 19, 6	srgmulgass 20033	. . . . . . . . . 10 ⊢ ((𝑅 ∈ SRing ∧ ((𝑁C(𝑗 − 1)) ∈ ℕ₀ ∧ (((𝑁 + 1) − 𝑗) ↑ 𝐴) ∈ 𝑆 ∧ ((𝑗 − 1) ↑ 𝐵) ∈ 𝑆)) → (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × ((𝑗 − 1) ↑ 𝐵)) = ((𝑁C(𝑗 − 1)) · ((((𝑁 + 1) − 𝑗) ↑ 𝐴) × ((𝑗 − 1) ↑ 𝐵))))
87	61, 65, 78, 85, 86	syl13anc 1372	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × ((𝑗 − 1) ↑ 𝐵)) = ((𝑁C(𝑗 − 1)) · ((((𝑁 + 1) − 𝑗) ↑ 𝐴) × ((𝑗 − 1) ↑ 𝐵))))
88	87	eqcomd 2738	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → ((𝑁C(𝑗 − 1)) · ((((𝑁 + 1) − 𝑗) ↑ 𝐴) × ((𝑗 − 1) ↑ 𝐵))) = (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × ((𝑗 − 1) ↑ 𝐵)))
89	88	oveq1d 7420	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → (((𝑁C(𝑗 − 1)) · ((((𝑁 + 1) − 𝑗) ↑ 𝐴) × ((𝑗 − 1) ↑ 𝐵))) × 𝐵) = ((((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × ((𝑗 − 1) ↑ 𝐵)) × 𝐵))
90		srgmnd 20006	. . . . . . . . . . . 12 ⊢ (𝑅 ∈ SRing → 𝑅 ∈ Mnd)
91	7, 90	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑅 ∈ Mnd)
92	91	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → 𝑅 ∈ Mnd)
93	3, 19, 92, 65, 78	mulgnn0cld 18969	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → ((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) ∈ 𝑆)
94	3, 6	srgass 20010	. . . . . . . . 9 ⊢ ((𝑅 ∈ SRing ∧ (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) ∈ 𝑆 ∧ ((𝑗 − 1) ↑ 𝐵) ∈ 𝑆 ∧ 𝐵 ∈ 𝑆)) → ((((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × ((𝑗 − 1) ↑ 𝐵)) × 𝐵) = (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × (((𝑗 − 1) ↑ 𝐵) × 𝐵)))
95	61, 93, 85, 84, 94	syl13anc 1372	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → ((((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × ((𝑗 − 1) ↑ 𝐵)) × 𝐵) = (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × (((𝑗 − 1) ↑ 𝐵) × 𝐵)))
96	20, 6	mgpplusg 19985	. . . . . . . . . . . 12 ⊢ × = (+_g‘𝐺)
97	66, 21, 96	mulgnn0p1 18959	. . . . . . . . . . 11 ⊢ ((𝐺 ∈ Mnd ∧ (𝑗 − 1) ∈ ℕ₀ ∧ 𝐵 ∈ 𝑆) → (((𝑗 − 1) + 1) ↑ 𝐵) = (((𝑗 − 1) ↑ 𝐵) × 𝐵))
98	97	eqcomd 2738	. . . . . . . . . 10 ⊢ ((𝐺 ∈ Mnd ∧ (𝑗 − 1) ∈ ℕ₀ ∧ 𝐵 ∈ 𝑆) → (((𝑗 − 1) ↑ 𝐵) × 𝐵) = (((𝑗 − 1) + 1) ↑ 𝐵))
99	69, 83, 84, 98	syl3anc 1371	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → (((𝑗 − 1) ↑ 𝐵) × 𝐵) = (((𝑗 − 1) + 1) ↑ 𝐵))
100	99	oveq2d 7421	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × (((𝑗 − 1) ↑ 𝐵) × 𝐵)) = (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × (((𝑗 − 1) + 1) ↑ 𝐵)))
101	52	zcnd 12663	. . . . . . . . . . . 12 ⊢ (𝑗 ∈ ((0 + 1)...(𝑁 + 1)) → 𝑗 ∈ ℂ)
102		1cnd 11205	. . . . . . . . . . . 12 ⊢ (𝑗 ∈ ((0 + 1)...(𝑁 + 1)) → 1 ∈ ℂ)
103	101, 102	npcand 11571	. . . . . . . . . . 11 ⊢ (𝑗 ∈ ((0 + 1)...(𝑁 + 1)) → ((𝑗 − 1) + 1) = 𝑗)
104	103	adantl 482	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → ((𝑗 − 1) + 1) = 𝑗)
105	104	oveq1d 7420	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → (((𝑗 − 1) + 1) ↑ 𝐵) = (𝑗 ↑ 𝐵))
106	105	oveq2d 7421	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × (((𝑗 − 1) + 1) ↑ 𝐵)) = (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × (𝑗 ↑ 𝐵)))
107	95, 100, 106	3eqtrd 2776	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → ((((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × ((𝑗 − 1) ↑ 𝐵)) × 𝐵) = (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × (𝑗 ↑ 𝐵)))
108	60, 89, 107	3eqtrd 2776	. . . . . 6 ⊢ ((𝜑 ∧ 𝑗 ∈ ((0 + 1)...(𝑁 + 1))) → (((𝑁C(𝑗 − 1)) · (((𝑁 − (𝑗 − 1)) ↑ 𝐴) × ((𝑗 − 1) ↑ 𝐵))) × 𝐵) = (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × (𝑗 ↑ 𝐵)))
109	108	mpteq2dva 5247	. . . . 5 ⊢ (𝜑 → (𝑗 ∈ ((0 + 1)...(𝑁 + 1)) ↦ (((𝑁C(𝑗 − 1)) · (((𝑁 − (𝑗 − 1)) ↑ 𝐴) × ((𝑗 − 1) ↑ 𝐵))) × 𝐵)) = (𝑗 ∈ ((0 + 1)...(𝑁 + 1)) ↦ (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × (𝑗 ↑ 𝐵))))
110	109	oveq2d 7421	. . . 4 ⊢ (𝜑 → (𝑅 Σ_g (𝑗 ∈ ((0 + 1)...(𝑁 + 1)) ↦ (((𝑁C(𝑗 − 1)) · (((𝑁 − (𝑗 − 1)) ↑ 𝐴) × ((𝑗 − 1) ↑ 𝐵))) × 𝐵))) = (𝑅 Σ_g (𝑗 ∈ ((0 + 1)...(𝑁 + 1)) ↦ (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × (𝑗 ↑ 𝐵)))))
111	71	mpteq1i 5243	. . . . . . 7 ⊢ (𝑗 ∈ ((0 + 1)...(𝑁 + 1)) ↦ (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × (𝑗 ↑ 𝐵))) = (𝑗 ∈ (1...(𝑁 + 1)) ↦ (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × (𝑗 ↑ 𝐵)))
112		oveq1 7412	. . . . . . . . . . 11 ⊢ (𝑗 = 𝑘 → (𝑗 − 1) = (𝑘 − 1))
113	112	oveq2d 7421	. . . . . . . . . 10 ⊢ (𝑗 = 𝑘 → (𝑁C(𝑗 − 1)) = (𝑁C(𝑘 − 1)))
114		oveq2 7413	. . . . . . . . . . 11 ⊢ (𝑗 = 𝑘 → ((𝑁 + 1) − 𝑗) = ((𝑁 + 1) − 𝑘))
115	114	oveq1d 7420	. . . . . . . . . 10 ⊢ (𝑗 = 𝑘 → (((𝑁 + 1) − 𝑗) ↑ 𝐴) = (((𝑁 + 1) − 𝑘) ↑ 𝐴))
116	113, 115	oveq12d 7423	. . . . . . . . 9 ⊢ (𝑗 = 𝑘 → ((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) = ((𝑁C(𝑘 − 1)) · (((𝑁 + 1) − 𝑘) ↑ 𝐴)))
117		oveq1 7412	. . . . . . . . 9 ⊢ (𝑗 = 𝑘 → (𝑗 ↑ 𝐵) = (𝑘 ↑ 𝐵))
118	116, 117	oveq12d 7423	. . . . . . . 8 ⊢ (𝑗 = 𝑘 → (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × (𝑗 ↑ 𝐵)) = (((𝑁C(𝑘 − 1)) · (((𝑁 + 1) − 𝑘) ↑ 𝐴)) × (𝑘 ↑ 𝐵)))
119	118	cbvmptv 5260	. . . . . . 7 ⊢ (𝑗 ∈ (1...(𝑁 + 1)) ↦ (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × (𝑗 ↑ 𝐵))) = (𝑘 ∈ (1...(𝑁 + 1)) ↦ (((𝑁C(𝑘 − 1)) · (((𝑁 + 1) − 𝑘) ↑ 𝐴)) × (𝑘 ↑ 𝐵)))
120	111, 119	eqtri 2760	. . . . . 6 ⊢ (𝑗 ∈ ((0 + 1)...(𝑁 + 1)) ↦ (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × (𝑗 ↑ 𝐵))) = (𝑘 ∈ (1...(𝑁 + 1)) ↦ (((𝑁C(𝑘 − 1)) · (((𝑁 + 1) − 𝑘) ↑ 𝐴)) × (𝑘 ↑ 𝐵)))
121	120	oveq2i 7416	. . . . 5 ⊢ (𝑅 Σ_g (𝑗 ∈ ((0 + 1)...(𝑁 + 1)) ↦ (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × (𝑗 ↑ 𝐵)))) = (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ (((𝑁C(𝑘 − 1)) · (((𝑁 + 1) − 𝑘) ↑ 𝐴)) × (𝑘 ↑ 𝐵))))
122		fzfid 13934	. . . . . . . . 9 ⊢ (𝜑 → (1...(𝑁 + 1)) ∈ Fin)
123		simpl 483	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...(𝑁 + 1))) → 𝜑)
124		elfzelz 13497	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ (1...(𝑁 + 1)) → 𝑘 ∈ ℤ)
125		peano2zm 12601	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ ℤ → (𝑘 − 1) ∈ ℤ)
126	124, 125	syl 17	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ (1...(𝑁 + 1)) → (𝑘 − 1) ∈ ℤ)
127		bccl 14278	. . . . . . . . . . . 12 ⊢ ((𝑁 ∈ ℕ₀ ∧ (𝑘 − 1) ∈ ℤ) → (𝑁C(𝑘 − 1)) ∈ ℕ₀)
128	11, 126, 127	syl2an 596	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...(𝑁 + 1))) → (𝑁C(𝑘 − 1)) ∈ ℕ₀)
129		fznn0sub 13529	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ (1...(𝑁 + 1)) → ((𝑁 + 1) − 𝑘) ∈ ℕ₀)
130	129	adantl 482	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...(𝑁 + 1))) → ((𝑁 + 1) − 𝑘) ∈ ℕ₀)
131		elfznn 13526	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ (1...(𝑁 + 1)) → 𝑘 ∈ ℕ)
132	131	nnnn0d 12528	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ (1...(𝑁 + 1)) → 𝑘 ∈ ℕ₀)
133	132	adantl 482	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...(𝑁 + 1))) → 𝑘 ∈ ℕ₀)
134	3, 6, 19, 5, 20, 21, 7, 22, 9, 23, 11	srgbinomlem2 20043	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ ((𝑁C(𝑘 − 1)) ∈ ℕ₀ ∧ ((𝑁 + 1) − 𝑘) ∈ ℕ₀ ∧ 𝑘 ∈ ℕ₀)) → ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ 𝑆)
135	123, 128, 130, 133, 134	syl13anc 1372	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...(𝑁 + 1))) → ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ 𝑆)
136	135	ralrimiva 3146	. . . . . . . . 9 ⊢ (𝜑 → ∀𝑘 ∈ (1...(𝑁 + 1))((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ 𝑆)
137	3, 33, 122, 136	gsummptcl 19829	. . . . . . . 8 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) ∈ 𝑆)
138	3, 5, 4	mndlid 18641	. . . . . . . 8 ⊢ ((𝑅 ∈ Mnd ∧ (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) ∈ 𝑆) → ((0_g‘𝑅) + (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))))) = (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))
139	91, 137, 138	syl2anc 584	. . . . . . 7 ⊢ (𝜑 → ((0_g‘𝑅) + (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))))) = (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))
140		0nn0 12483	. . . . . . . . . . 11 ⊢ 0 ∈ ℕ₀
141	140	a1i 11	. . . . . . . . . 10 ⊢ (𝜑 → 0 ∈ ℕ₀)
142		id 22	. . . . . . . . . . 11 ⊢ (𝜑 → 𝜑)
143		0z 12565	. . . . . . . . . . . . . 14 ⊢ 0 ∈ ℤ
144	143, 34	pm3.2i 471	. . . . . . . . . . . . 13 ⊢ (0 ∈ ℤ ∧ 1 ∈ ℤ)
145		zsubcl 12600	. . . . . . . . . . . . 13 ⊢ ((0 ∈ ℤ ∧ 1 ∈ ℤ) → (0 − 1) ∈ ℤ)
146	144, 145	mp1i 13	. . . . . . . . . . . 12 ⊢ (𝜑 → (0 − 1) ∈ ℤ)
147		bccl 14278	. . . . . . . . . . . 12 ⊢ ((𝑁 ∈ ℕ₀ ∧ (0 − 1) ∈ ℤ) → (𝑁C(0 − 1)) ∈ ℕ₀)
148	11, 146, 147	syl2anc 584	. . . . . . . . . . 11 ⊢ (𝜑 → (𝑁C(0 − 1)) ∈ ℕ₀)
149		nn0cn 12478	. . . . . . . . . . . . . . 15 ⊢ (𝑁 ∈ ℕ₀ → 𝑁 ∈ ℂ)
150		peano2cn 11382	. . . . . . . . . . . . . . 15 ⊢ (𝑁 ∈ ℂ → (𝑁 + 1) ∈ ℂ)
151	149, 150	syl 17	. . . . . . . . . . . . . 14 ⊢ (𝑁 ∈ ℕ₀ → (𝑁 + 1) ∈ ℂ)
152	151	subid1d 11556	. . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℕ₀ → ((𝑁 + 1) − 0) = (𝑁 + 1))
153		peano2nn0 12508	. . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℕ₀ → (𝑁 + 1) ∈ ℕ₀)
154	152, 153	eqeltrd 2833	. . . . . . . . . . . 12 ⊢ (𝑁 ∈ ℕ₀ → ((𝑁 + 1) − 0) ∈ ℕ₀)
155	11, 154	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → ((𝑁 + 1) − 0) ∈ ℕ₀)
156	3, 6, 19, 5, 20, 21, 7, 22, 9, 23, 11	srgbinomlem2 20043	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ ((𝑁C(0 − 1)) ∈ ℕ₀ ∧ ((𝑁 + 1) − 0) ∈ ℕ₀ ∧ 0 ∈ ℕ₀)) → ((𝑁C(0 − 1)) · ((((𝑁 + 1) − 0) ↑ 𝐴) × (0 ↑ 𝐵))) ∈ 𝑆)
157	142, 148, 155, 141, 156	syl13anc 1372	. . . . . . . . . 10 ⊢ (𝜑 → ((𝑁C(0 − 1)) · ((((𝑁 + 1) − 0) ↑ 𝐴) × (0 ↑ 𝐵))) ∈ 𝑆)
158		oveq1 7412	. . . . . . . . . . . . 13 ⊢ (𝑘 = 0 → (𝑘 − 1) = (0 − 1))
159	158	oveq2d 7421	. . . . . . . . . . . 12 ⊢ (𝑘 = 0 → (𝑁C(𝑘 − 1)) = (𝑁C(0 − 1)))
160		oveq2 7413	. . . . . . . . . . . . . 14 ⊢ (𝑘 = 0 → ((𝑁 + 1) − 𝑘) = ((𝑁 + 1) − 0))
161	160	oveq1d 7420	. . . . . . . . . . . . 13 ⊢ (𝑘 = 0 → (((𝑁 + 1) − 𝑘) ↑ 𝐴) = (((𝑁 + 1) − 0) ↑ 𝐴))
162		oveq1 7412	. . . . . . . . . . . . 13 ⊢ (𝑘 = 0 → (𝑘 ↑ 𝐵) = (0 ↑ 𝐵))
163	161, 162	oveq12d 7423	. . . . . . . . . . . 12 ⊢ (𝑘 = 0 → ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)) = ((((𝑁 + 1) − 0) ↑ 𝐴) × (0 ↑ 𝐵)))
164	159, 163	oveq12d 7423	. . . . . . . . . . 11 ⊢ (𝑘 = 0 → ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) = ((𝑁C(0 − 1)) · ((((𝑁 + 1) − 0) ↑ 𝐴) × (0 ↑ 𝐵))))
165	3, 164	gsumsn 19816	. . . . . . . . . 10 ⊢ ((𝑅 ∈ Mnd ∧ 0 ∈ ℕ₀ ∧ ((𝑁C(0 − 1)) · ((((𝑁 + 1) − 0) ↑ 𝐴) × (0 ↑ 𝐵))) ∈ 𝑆) → (𝑅 Σ_g (𝑘 ∈ {0} ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) = ((𝑁C(0 − 1)) · ((((𝑁 + 1) − 0) ↑ 𝐴) × (0 ↑ 𝐵))))
166	91, 141, 157, 165	syl3anc 1371	. . . . . . . . 9 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ {0} ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) = ((𝑁C(0 − 1)) · ((((𝑁 + 1) − 0) ↑ 𝐴) × (0 ↑ 𝐵))))
167		0lt1 11732	. . . . . . . . . . . . . . 15 ⊢ 0 < 1
168	167	a1i 11	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 0 < 1)
169	168, 70	breqtrrdi 5189	. . . . . . . . . . . . 13 ⊢ (𝜑 → 0 < (0 + 1))
170		0re 11212	. . . . . . . . . . . . . . 15 ⊢ 0 ∈ ℝ
171		1re 11210	. . . . . . . . . . . . . . 15 ⊢ 1 ∈ ℝ
172	170, 171, 170	3pm3.2i 1339	. . . . . . . . . . . . . 14 ⊢ (0 ∈ ℝ ∧ 1 ∈ ℝ ∧ 0 ∈ ℝ)
173		ltsubadd 11680	. . . . . . . . . . . . . 14 ⊢ ((0 ∈ ℝ ∧ 1 ∈ ℝ ∧ 0 ∈ ℝ) → ((0 − 1) < 0 ↔ 0 < (0 + 1)))
174	172, 173	mp1i 13	. . . . . . . . . . . . 13 ⊢ (𝜑 → ((0 − 1) < 0 ↔ 0 < (0 + 1)))
175	169, 174	mpbird 256	. . . . . . . . . . . 12 ⊢ (𝜑 → (0 − 1) < 0)
176	175	orcd 871	. . . . . . . . . . 11 ⊢ (𝜑 → ((0 − 1) < 0 ∨ 𝑁 < (0 − 1)))
177		bcval4 14263	. . . . . . . . . . 11 ⊢ ((𝑁 ∈ ℕ₀ ∧ (0 − 1) ∈ ℤ ∧ ((0 − 1) < 0 ∨ 𝑁 < (0 − 1))) → (𝑁C(0 − 1)) = 0)
178	11, 146, 176, 177	syl3anc 1371	. . . . . . . . . 10 ⊢ (𝜑 → (𝑁C(0 − 1)) = 0)
179	178	oveq1d 7420	. . . . . . . . 9 ⊢ (𝜑 → ((𝑁C(0 − 1)) · ((((𝑁 + 1) − 0) ↑ 𝐴) × (0 ↑ 𝐵))) = (0 · ((((𝑁 + 1) − 0) ↑ 𝐴) × (0 ↑ 𝐵))))
180	66, 21, 68, 155, 22	mulgnn0cld 18969	. . . . . . . . . . 11 ⊢ (𝜑 → (((𝑁 + 1) − 0) ↑ 𝐴) ∈ 𝑆)
181	66, 21, 68, 141, 9	mulgnn0cld 18969	. . . . . . . . . . 11 ⊢ (𝜑 → (0 ↑ 𝐵) ∈ 𝑆)
182	3, 6	srgcl 20009	. . . . . . . . . . 11 ⊢ ((𝑅 ∈ SRing ∧ (((𝑁 + 1) − 0) ↑ 𝐴) ∈ 𝑆 ∧ (0 ↑ 𝐵) ∈ 𝑆) → ((((𝑁 + 1) − 0) ↑ 𝐴) × (0 ↑ 𝐵)) ∈ 𝑆)
183	7, 180, 181, 182	syl3anc 1371	. . . . . . . . . 10 ⊢ (𝜑 → ((((𝑁 + 1) − 0) ↑ 𝐴) × (0 ↑ 𝐵)) ∈ 𝑆)
184	3, 4, 19	mulg0 18951	. . . . . . . . . 10 ⊢ (((((𝑁 + 1) − 0) ↑ 𝐴) × (0 ↑ 𝐵)) ∈ 𝑆 → (0 · ((((𝑁 + 1) − 0) ↑ 𝐴) × (0 ↑ 𝐵))) = (0_g‘𝑅))
185	183, 184	syl 17	. . . . . . . . 9 ⊢ (𝜑 → (0 · ((((𝑁 + 1) − 0) ↑ 𝐴) × (0 ↑ 𝐵))) = (0_g‘𝑅))
186	166, 179, 185	3eqtrrd 2777	. . . . . . . 8 ⊢ (𝜑 → (0_g‘𝑅) = (𝑅 Σ_g (𝑘 ∈ {0} ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))
187	186	oveq1d 7420	. . . . . . 7 ⊢ (𝜑 → ((0_g‘𝑅) + (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))))) = ((𝑅 Σ_g (𝑘 ∈ {0} ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) + (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))))))
188	139, 187	eqtr3d 2774	. . . . . 6 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) = ((𝑅 Σ_g (𝑘 ∈ {0} ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) + (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))))))
189	7	adantr 481	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...(𝑁 + 1))) → 𝑅 ∈ SRing)
190	68	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...(𝑁 + 1))) → 𝐺 ∈ Mnd)
191	22	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...(𝑁 + 1))) → 𝐴 ∈ 𝑆)
192	66, 21, 190, 130, 191	mulgnn0cld 18969	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...(𝑁 + 1))) → (((𝑁 + 1) − 𝑘) ↑ 𝐴) ∈ 𝑆)
193	9	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...(𝑁 + 1))) → 𝐵 ∈ 𝑆)
194	66, 21, 190, 133, 193	mulgnn0cld 18969	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...(𝑁 + 1))) → (𝑘 ↑ 𝐵) ∈ 𝑆)
195	3, 19, 6	srgmulgass 20033	. . . . . . . . 9 ⊢ ((𝑅 ∈ SRing ∧ ((𝑁C(𝑘 − 1)) ∈ ℕ₀ ∧ (((𝑁 + 1) − 𝑘) ↑ 𝐴) ∈ 𝑆 ∧ (𝑘 ↑ 𝐵) ∈ 𝑆)) → (((𝑁C(𝑘 − 1)) · (((𝑁 + 1) − 𝑘) ↑ 𝐴)) × (𝑘 ↑ 𝐵)) = ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))
196	189, 128, 192, 194, 195	syl13anc 1372	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...(𝑁 + 1))) → (((𝑁C(𝑘 − 1)) · (((𝑁 + 1) − 𝑘) ↑ 𝐴)) × (𝑘 ↑ 𝐵)) = ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))
197	196	mpteq2dva 5247	. . . . . . 7 ⊢ (𝜑 → (𝑘 ∈ (1...(𝑁 + 1)) ↦ (((𝑁C(𝑘 − 1)) · (((𝑁 + 1) − 𝑘) ↑ 𝐴)) × (𝑘 ↑ 𝐵))) = (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))))
198	197	oveq2d 7421	. . . . . 6 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ (((𝑁C(𝑘 − 1)) · (((𝑁 + 1) − 𝑘) ↑ 𝐴)) × (𝑘 ↑ 𝐵)))) = (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))
199	11, 153	syl 17	. . . . . . . 8 ⊢ (𝜑 → (𝑁 + 1) ∈ ℕ₀)
200		simpl 483	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 + 1))) → 𝜑)
201		elfzelz 13497	. . . . . . . . . . 11 ⊢ (𝑘 ∈ (0...(𝑁 + 1)) → 𝑘 ∈ ℤ)
202	201, 125	syl 17	. . . . . . . . . 10 ⊢ (𝑘 ∈ (0...(𝑁 + 1)) → (𝑘 − 1) ∈ ℤ)
203	11, 202, 127	syl2an 596	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 + 1))) → (𝑁C(𝑘 − 1)) ∈ ℕ₀)
204		fznn0sub 13529	. . . . . . . . . 10 ⊢ (𝑘 ∈ (0...(𝑁 + 1)) → ((𝑁 + 1) − 𝑘) ∈ ℕ₀)
205	204	adantl 482	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 + 1))) → ((𝑁 + 1) − 𝑘) ∈ ℕ₀)
206		elfznn0 13590	. . . . . . . . . 10 ⊢ (𝑘 ∈ (0...(𝑁 + 1)) → 𝑘 ∈ ℕ₀)
207	206	adantl 482	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 + 1))) → 𝑘 ∈ ℕ₀)
208	200, 203, 205, 207, 134	syl13anc 1372	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 + 1))) → ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ 𝑆)
209	3, 5, 33, 199, 208	gsummptfzsplitl 19795	. . . . . . 7 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ (0...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) = ((𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) + (𝑅 Σ_g (𝑘 ∈ {0} ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))))))
210		snfi 9040	. . . . . . . . . 10 ⊢ {0} ∈ Fin
211	210	a1i 11	. . . . . . . . 9 ⊢ (𝜑 → {0} ∈ Fin)
212	164	eleq1d 2818	. . . . . . . . . . . 12 ⊢ (𝑘 = 0 → (((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ 𝑆 ↔ ((𝑁C(0 − 1)) · ((((𝑁 + 1) − 0) ↑ 𝐴) × (0 ↑ 𝐵))) ∈ 𝑆))
213	212	ralsng 4676	. . . . . . . . . . 11 ⊢ (0 ∈ ℕ₀ → (∀𝑘 ∈ {0} ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ 𝑆 ↔ ((𝑁C(0 − 1)) · ((((𝑁 + 1) − 0) ↑ 𝐴) × (0 ↑ 𝐵))) ∈ 𝑆))
214	140, 213	ax-mp 5	. . . . . . . . . 10 ⊢ (∀𝑘 ∈ {0} ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ 𝑆 ↔ ((𝑁C(0 − 1)) · ((((𝑁 + 1) − 0) ↑ 𝐴) × (0 ↑ 𝐵))) ∈ 𝑆)
215	157, 214	sylibr 233	. . . . . . . . 9 ⊢ (𝜑 → ∀𝑘 ∈ {0} ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ 𝑆)
216	3, 33, 211, 215	gsummptcl 19829	. . . . . . . 8 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ {0} ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) ∈ 𝑆)
217	3, 5	cmncom 19660	. . . . . . . 8 ⊢ ((𝑅 ∈ CMnd ∧ (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) ∈ 𝑆 ∧ (𝑅 Σ_g (𝑘 ∈ {0} ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) ∈ 𝑆) → ((𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) + (𝑅 Σ_g (𝑘 ∈ {0} ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))))) = ((𝑅 Σ_g (𝑘 ∈ {0} ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) + (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))))))
218	33, 137, 216, 217	syl3anc 1371	. . . . . . 7 ⊢ (𝜑 → ((𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) + (𝑅 Σ_g (𝑘 ∈ {0} ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))))) = ((𝑅 Σ_g (𝑘 ∈ {0} ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) + (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))))))
219	209, 218	eqtrd 2772	. . . . . 6 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ (0...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) = ((𝑅 Σ_g (𝑘 ∈ {0} ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) + (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))))))
220	188, 198, 219	3eqtr4d 2782	. . . . 5 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ (1...(𝑁 + 1)) ↦ (((𝑁C(𝑘 − 1)) · (((𝑁 + 1) − 𝑘) ↑ 𝐴)) × (𝑘 ↑ 𝐵)))) = (𝑅 Σ_g (𝑘 ∈ (0...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))
221	121, 220	eqtrid 2784	. . . 4 ⊢ (𝜑 → (𝑅 Σ_g (𝑗 ∈ ((0 + 1)...(𝑁 + 1)) ↦ (((𝑁C(𝑗 − 1)) · (((𝑁 + 1) − 𝑗) ↑ 𝐴)) × (𝑗 ↑ 𝐵)))) = (𝑅 Σ_g (𝑘 ∈ (0...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))
222	49, 110, 221	3eqtrd 2776	. . 3 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ (((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) × 𝐵))) = (𝑅 Σ_g (𝑘 ∈ (0...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))
223	31, 222	eqtr3d 2774	. 2 ⊢ (𝜑 → ((𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) × 𝐵) = (𝑅 Σ_g (𝑘 ∈ (0...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))
224	2, 223	sylan9eqr 2794	1 ⊢ ((𝜑 ∧ 𝜓) → ((𝑁 ↑ (𝐴 + 𝐵)) × 𝐵) = (𝑅 Σ_g (𝑘 ∈ (0...(𝑁 + 1)) ↦ ((𝑁C(𝑘 − 1)) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 ∨ wo 845 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ∀wral 3061 Vcvv 3474 {csn 4627 class class class wbr 5147 ↦ cmpt 5230 ‘cfv 6540 (class class class)co 7405 Fincfn 8935 ℂcc 11104 ℝcr 11105 0cc0 11106 1c1 11107 + caddc 11109 < clt 11244 − cmin 11440 ℕcn 12208 ℕ₀cn0 12468 ℤcz 12554 ...cfz 13480 Ccbc 14258 Basecbs 17140 +_gcplusg 17193 ._rcmulr 17194 0_gc0g 17381 Σ_g cgsu 17382 Mndcmnd 18621 ._gcmg 18944 CMndccmn 19642 mulGrpcmgp 19981 SRingcsrg 20002

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-iin 4999 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-se 5631 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-isom 6549 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-of 7666 df-om 7852 df-1st 7971 df-2nd 7972 df-supp 8143 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-1o 8462 df-er 8699 df-map 8818 df-en 8936 df-dom 8937 df-sdom 8938 df-fin 8939 df-fsupp 9358 df-oi 9501 df-card 9930 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-div 11868 df-nn 12209 df-2 12271 df-n0 12469 df-z 12555 df-uz 12819 df-rp 12971 df-fz 13481 df-fzo 13624 df-seq 13963 df-fac 14230 df-bc 14259 df-hash 14287 df-sets 17093 df-slot 17111 df-ndx 17123 df-base 17141 df-ress 17170 df-plusg 17206 df-0g 17383 df-gsum 17384 df-mre 17526 df-mrc 17527 df-acs 17529 df-mgm 18557 df-sgrp 18606 df-mnd 18622 df-mhm 18667 df-submnd 18668 df-mulg 18945 df-cntz 19175 df-cmn 19644 df-mgp 19982 df-srg 20003

This theorem is referenced by: srgbinomlem 20046

W3C validator