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Theorem srgbinomlem3 20123

Description: Lemma 3 for srgbinomlem 20125. (Contributed by AV, 23-Aug-2019.) (Proof shortened by AV, 27-Oct-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
srgbinomlem3	⊢ ((𝜑 ∧ 𝜓) → ((𝑁 ↑ (𝐴 + 𝐵)) × 𝐴) = (𝑅 Σ_g (𝑘 ∈ (0...(𝑁 + 1)) ↦ ((𝑁C𝑘) · ((((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 srgbinomlem3**
Step	Hyp	Ref	Expression
1		srgbinomlem.i	. . . 4 ⊢ (𝜓 → (𝑁 ↑ (𝐴 + 𝐵)) = (𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))
2	1	adantl 481	. . 3 ⊢ ((𝜑 ∧ 𝜓) → (𝑁 ↑ (𝐴 + 𝐵)) = (𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))
3	2	oveq1d 7427	. 2 ⊢ ((𝜑 ∧ 𝜓) → ((𝑁 ↑ (𝐴 + 𝐵)) × 𝐴) = ((𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) × 𝐴))
4		srgbinom.s	. . . . . 6 ⊢ 𝑆 = (Base‘𝑅)
5		srgbinom.a	. . . . . 6 ⊢ + = (+_g‘𝑅)
6		srgbinomlem.r	. . . . . . 7 ⊢ (𝜑 → 𝑅 ∈ SRing)
7		srgcmn 20084	. . . . . . 7 ⊢ (𝑅 ∈ SRing → 𝑅 ∈ CMnd)
8	6, 7	syl 17	. . . . . 6 ⊢ (𝜑 → 𝑅 ∈ CMnd)
9		srgbinomlem.n	. . . . . 6 ⊢ (𝜑 → 𝑁 ∈ ℕ₀)
10		simpl 482	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 + 1))) → 𝜑)
11		elfzelz 13506	. . . . . . . 8 ⊢ (𝑘 ∈ (0...(𝑁 + 1)) → 𝑘 ∈ ℤ)
12		bccl 14287	. . . . . . . 8 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → (𝑁C𝑘) ∈ ℕ₀)
13	9, 11, 12	syl2an 595	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 + 1))) → (𝑁C𝑘) ∈ ℕ₀)
14		fznn0sub 13538	. . . . . . . 8 ⊢ (𝑘 ∈ (0...(𝑁 + 1)) → ((𝑁 + 1) − 𝑘) ∈ ℕ₀)
15	14	adantl 481	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 + 1))) → ((𝑁 + 1) − 𝑘) ∈ ℕ₀)
16		elfznn0 13599	. . . . . . . 8 ⊢ (𝑘 ∈ (0...(𝑁 + 1)) → 𝑘 ∈ ℕ₀)
17	16	adantl 481	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 + 1))) → 𝑘 ∈ ℕ₀)
18		srgbinom.m	. . . . . . . 8 ⊢ × = (._r‘𝑅)
19		srgbinom.t	. . . . . . . 8 ⊢ · = (._g‘𝑅)
20		srgbinom.g	. . . . . . . 8 ⊢ 𝐺 = (mulGrp‘𝑅)
21		srgbinom.e	. . . . . . . 8 ⊢ ↑ = (._g‘𝐺)
22		srgbinomlem.a	. . . . . . . 8 ⊢ (𝜑 → 𝐴 ∈ 𝑆)
23		srgbinomlem.b	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ 𝑆)
24		srgbinomlem.c	. . . . . . . 8 ⊢ (𝜑 → (𝐴 × 𝐵) = (𝐵 × 𝐴))
25	4, 18, 19, 5, 20, 21, 6, 22, 23, 24, 9	srgbinomlem2 20122	. . . . . . 7 ⊢ ((𝜑 ∧ ((𝑁C𝑘) ∈ ℕ₀ ∧ ((𝑁 + 1) − 𝑘) ∈ ℕ₀ ∧ 𝑘 ∈ ℕ₀)) → ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ 𝑆)
26	10, 13, 15, 17, 25	syl13anc 1371	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 + 1))) → ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ 𝑆)
27	4, 5, 8, 9, 26	gsummptfzsplit 19842	. . . . 5 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ (0...(𝑁 + 1)) ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) = ((𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) + (𝑅 Σ_g (𝑘 ∈ {(𝑁 + 1)} ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))))))
28		srgmnd 20085	. . . . . . . . 9 ⊢ (𝑅 ∈ SRing → 𝑅 ∈ Mnd)
29	6, 28	syl 17	. . . . . . . 8 ⊢ (𝜑 → 𝑅 ∈ Mnd)
30		ovexd 7447	. . . . . . . 8 ⊢ (𝜑 → (𝑁 + 1) ∈ V)
31		id 22	. . . . . . . . 9 ⊢ (𝜑 → 𝜑)
32	9	nn0zd 12589	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑁 ∈ ℤ)
33	32	peano2zd 12674	. . . . . . . . . 10 ⊢ (𝜑 → (𝑁 + 1) ∈ ℤ)
34		bccl 14287	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ₀ ∧ (𝑁 + 1) ∈ ℤ) → (𝑁C(𝑁 + 1)) ∈ ℕ₀)
35	9, 33, 34	syl2anc 583	. . . . . . . . 9 ⊢ (𝜑 → (𝑁C(𝑁 + 1)) ∈ ℕ₀)
36	9	nn0cnd 12539	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑁 ∈ ℂ)
37		peano2cn 11391	. . . . . . . . . . . 12 ⊢ (𝑁 ∈ ℂ → (𝑁 + 1) ∈ ℂ)
38	36, 37	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → (𝑁 + 1) ∈ ℂ)
39	38	subidd 11564	. . . . . . . . . 10 ⊢ (𝜑 → ((𝑁 + 1) − (𝑁 + 1)) = 0)
40		0nn0 12492	. . . . . . . . . 10 ⊢ 0 ∈ ℕ₀
41	39, 40	eqeltrdi 2840	. . . . . . . . 9 ⊢ (𝜑 → ((𝑁 + 1) − (𝑁 + 1)) ∈ ℕ₀)
42		peano2nn0 12517	. . . . . . . . . 10 ⊢ (𝑁 ∈ ℕ₀ → (𝑁 + 1) ∈ ℕ₀)
43	9, 42	syl 17	. . . . . . . . 9 ⊢ (𝜑 → (𝑁 + 1) ∈ ℕ₀)
44	4, 18, 19, 5, 20, 21, 6, 22, 23, 24, 9	srgbinomlem2 20122	. . . . . . . . 9 ⊢ ((𝜑 ∧ ((𝑁C(𝑁 + 1)) ∈ ℕ₀ ∧ ((𝑁 + 1) − (𝑁 + 1)) ∈ ℕ₀ ∧ (𝑁 + 1) ∈ ℕ₀)) → ((𝑁C(𝑁 + 1)) · ((((𝑁 + 1) − (𝑁 + 1)) ↑ 𝐴) × ((𝑁 + 1) ↑ 𝐵))) ∈ 𝑆)
45	31, 35, 41, 43, 44	syl13anc 1371	. . . . . . . 8 ⊢ (𝜑 → ((𝑁C(𝑁 + 1)) · ((((𝑁 + 1) − (𝑁 + 1)) ↑ 𝐴) × ((𝑁 + 1) ↑ 𝐵))) ∈ 𝑆)
46		oveq2 7420	. . . . . . . . . 10 ⊢ (𝑘 = (𝑁 + 1) → (𝑁C𝑘) = (𝑁C(𝑁 + 1)))
47		oveq2 7420	. . . . . . . . . . . 12 ⊢ (𝑘 = (𝑁 + 1) → ((𝑁 + 1) − 𝑘) = ((𝑁 + 1) − (𝑁 + 1)))
48	47	oveq1d 7427	. . . . . . . . . . 11 ⊢ (𝑘 = (𝑁 + 1) → (((𝑁 + 1) − 𝑘) ↑ 𝐴) = (((𝑁 + 1) − (𝑁 + 1)) ↑ 𝐴))
49		oveq1 7419	. . . . . . . . . . 11 ⊢ (𝑘 = (𝑁 + 1) → (𝑘 ↑ 𝐵) = ((𝑁 + 1) ↑ 𝐵))
50	48, 49	oveq12d 7430	. . . . . . . . . 10 ⊢ (𝑘 = (𝑁 + 1) → ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)) = ((((𝑁 + 1) − (𝑁 + 1)) ↑ 𝐴) × ((𝑁 + 1) ↑ 𝐵)))
51	46, 50	oveq12d 7430	. . . . . . . . 9 ⊢ (𝑘 = (𝑁 + 1) → ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) = ((𝑁C(𝑁 + 1)) · ((((𝑁 + 1) − (𝑁 + 1)) ↑ 𝐴) × ((𝑁 + 1) ↑ 𝐵))))
52	4, 51	gsumsn 19864	. . . . . . . 8 ⊢ ((𝑅 ∈ Mnd ∧ (𝑁 + 1) ∈ V ∧ ((𝑁C(𝑁 + 1)) · ((((𝑁 + 1) − (𝑁 + 1)) ↑ 𝐴) × ((𝑁 + 1) ↑ 𝐵))) ∈ 𝑆) → (𝑅 Σ_g (𝑘 ∈ {(𝑁 + 1)} ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) = ((𝑁C(𝑁 + 1)) · ((((𝑁 + 1) − (𝑁 + 1)) ↑ 𝐴) × ((𝑁 + 1) ↑ 𝐵))))
53	29, 30, 45, 52	syl3anc 1370	. . . . . . 7 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ {(𝑁 + 1)} ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) = ((𝑁C(𝑁 + 1)) · ((((𝑁 + 1) − (𝑁 + 1)) ↑ 𝐴) × ((𝑁 + 1) ↑ 𝐵))))
54	9	nn0red 12538	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑁 ∈ ℝ)
55	54	ltp1d 12149	. . . . . . . . . 10 ⊢ (𝜑 → 𝑁 < (𝑁 + 1))
56	55	olcd 871	. . . . . . . . 9 ⊢ (𝜑 → ((𝑁 + 1) < 0 ∨ 𝑁 < (𝑁 + 1)))
57		bcval4 14272	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ₀ ∧ (𝑁 + 1) ∈ ℤ ∧ ((𝑁 + 1) < 0 ∨ 𝑁 < (𝑁 + 1))) → (𝑁C(𝑁 + 1)) = 0)
58	9, 33, 56, 57	syl3anc 1370	. . . . . . . 8 ⊢ (𝜑 → (𝑁C(𝑁 + 1)) = 0)
59	58	oveq1d 7427	. . . . . . 7 ⊢ (𝜑 → ((𝑁C(𝑁 + 1)) · ((((𝑁 + 1) − (𝑁 + 1)) ↑ 𝐴) × ((𝑁 + 1) ↑ 𝐵))) = (0 · ((((𝑁 + 1) − (𝑁 + 1)) ↑ 𝐴) × ((𝑁 + 1) ↑ 𝐵))))
60	4, 18, 19, 5, 20, 21, 6, 22, 23, 24, 9	srgbinomlem1 20121	. . . . . . . . 9 ⊢ ((𝜑 ∧ (((𝑁 + 1) − (𝑁 + 1)) ∈ ℕ₀ ∧ (𝑁 + 1) ∈ ℕ₀)) → ((((𝑁 + 1) − (𝑁 + 1)) ↑ 𝐴) × ((𝑁 + 1) ↑ 𝐵)) ∈ 𝑆)
61	31, 41, 43, 60	syl12anc 834	. . . . . . . 8 ⊢ (𝜑 → ((((𝑁 + 1) − (𝑁 + 1)) ↑ 𝐴) × ((𝑁 + 1) ↑ 𝐵)) ∈ 𝑆)
62		eqid 2731	. . . . . . . . 9 ⊢ (0_g‘𝑅) = (0_g‘𝑅)
63	4, 62, 19	mulg0 18994	. . . . . . . 8 ⊢ (((((𝑁 + 1) − (𝑁 + 1)) ↑ 𝐴) × ((𝑁 + 1) ↑ 𝐵)) ∈ 𝑆 → (0 · ((((𝑁 + 1) − (𝑁 + 1)) ↑ 𝐴) × ((𝑁 + 1) ↑ 𝐵))) = (0_g‘𝑅))
64	61, 63	syl 17	. . . . . . 7 ⊢ (𝜑 → (0 · ((((𝑁 + 1) − (𝑁 + 1)) ↑ 𝐴) × ((𝑁 + 1) ↑ 𝐵))) = (0_g‘𝑅))
65	53, 59, 64	3eqtrd 2775	. . . . . 6 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ {(𝑁 + 1)} ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) = (0_g‘𝑅))
66	65	oveq2d 7428	. . . . 5 ⊢ (𝜑 → ((𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) + (𝑅 Σ_g (𝑘 ∈ {(𝑁 + 1)} ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))))) = ((𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) + (0_g‘𝑅)))
67		fzfid 13943	. . . . . . 7 ⊢ (𝜑 → (0...𝑁) ∈ Fin)
68		simpl 482	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → 𝜑)
69		bccl2 14288	. . . . . . . . . . 11 ⊢ (𝑘 ∈ (0...𝑁) → (𝑁C𝑘) ∈ ℕ)
70	69	nnnn0d 12537	. . . . . . . . . 10 ⊢ (𝑘 ∈ (0...𝑁) → (𝑁C𝑘) ∈ ℕ₀)
71	70	adantl 481	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → (𝑁C𝑘) ∈ ℕ₀)
72		fzelp1 13558	. . . . . . . . . 10 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ (0...(𝑁 + 1)))
73	72, 15	sylan2 592	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁 + 1) − 𝑘) ∈ ℕ₀)
74		elfznn0 13599	. . . . . . . . . 10 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ ℕ₀)
75	74	adantl 481	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → 𝑘 ∈ ℕ₀)
76	68, 71, 73, 75, 25	syl13anc 1371	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ 𝑆)
77	76	ralrimiva 3145	. . . . . . 7 ⊢ (𝜑 → ∀𝑘 ∈ (0...𝑁)((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ 𝑆)
78	4, 8, 67, 77	gsummptcl 19877	. . . . . 6 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) ∈ 𝑆)
79	4, 5, 62	mndrid 18681	. . . . . 6 ⊢ ((𝑅 ∈ Mnd ∧ (𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) ∈ 𝑆) → ((𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) + (0_g‘𝑅)) = (𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))
80	29, 78, 79	syl2anc 583	. . . . 5 ⊢ (𝜑 → ((𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) + (0_g‘𝑅)) = (𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))
81	27, 66, 80	3eqtrd 2775	. . . 4 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ (0...(𝑁 + 1)) ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) = (𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))
82	6	adantr 480	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → 𝑅 ∈ SRing)
83	22	adantr 480	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → 𝐴 ∈ 𝑆)
84	23	adantr 480	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → 𝐵 ∈ 𝑆)
85	24	adantr 480	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → (𝐴 × 𝐵) = (𝐵 × 𝐴))
86		fznn0sub 13538	. . . . . . . . 9 ⊢ (𝑘 ∈ (0...𝑁) → (𝑁 − 𝑘) ∈ ℕ₀)
87	86	adantl 481	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → (𝑁 − 𝑘) ∈ ℕ₀)
88	4, 18, 20, 21, 82, 83, 84, 75, 85, 87, 19, 71	srgpcomppsc 20115	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → (((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) × 𝐴) = ((𝑁C𝑘) · ((((𝑁 − 𝑘) + 1) ↑ 𝐴) × (𝑘 ↑ 𝐵))))
89	36	adantr 480	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → 𝑁 ∈ ℂ)
90		1cnd 11214	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → 1 ∈ ℂ)
91		elfzelz 13506	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ ℤ)
92	91	zcnd 12672	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ ℂ)
93	92	adantl 481	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → 𝑘 ∈ ℂ)
94	89, 90, 93	addsubd 11597	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁 + 1) − 𝑘) = ((𝑁 − 𝑘) + 1))
95	94	oveq1d 7427	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → (((𝑁 + 1) − 𝑘) ↑ 𝐴) = (((𝑁 − 𝑘) + 1) ↑ 𝐴))
96	95	oveq1d 7427	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)) = ((((𝑁 − 𝑘) + 1) ↑ 𝐴) × (𝑘 ↑ 𝐵)))
97	96	oveq2d 7428	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) = ((𝑁C𝑘) · ((((𝑁 − 𝑘) + 1) ↑ 𝐴) × (𝑘 ↑ 𝐵))))
98	88, 97	eqtr4d 2774	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → (((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) × 𝐴) = ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))
99	98	mpteq2dva 5249	. . . . 5 ⊢ (𝜑 → (𝑘 ∈ (0...𝑁) ↦ (((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) × 𝐴)) = (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))))
100	99	oveq2d 7428	. . . 4 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ (((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) × 𝐴))) = (𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))
101		ovexd 7447	. . . . 5 ⊢ (𝜑 → (0...𝑁) ∈ V)
102	4, 18, 19, 5, 20, 21, 6, 22, 23, 24, 9	srgbinomlem2 20122	. . . . . 6 ⊢ ((𝜑 ∧ ((𝑁C𝑘) ∈ ℕ₀ ∧ (𝑁 − 𝑘) ∈ ℕ₀ ∧ 𝑘 ∈ ℕ₀)) → ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ 𝑆)
103	68, 71, 87, 75, 102	syl13anc 1371	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ 𝑆)
104		eqid 2731	. . . . . 6 ⊢ (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))) = (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))
105		ovexd 7447	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) ∈ V)
106		fvexd 6907	. . . . . 6 ⊢ (𝜑 → (0_g‘𝑅) ∈ V)
107	104, 67, 105, 106	fsuppmptdm 9377	. . . . 5 ⊢ (𝜑 → (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵)))) finSupp (0_g‘𝑅))
108	4, 62, 5, 18, 6, 101, 22, 103, 107	srgsummulcr 20118	. . . 4 ⊢ (𝜑 → (𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ (((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))) × 𝐴))) = ((𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) × 𝐴))
109	81, 100, 108	3eqtr2rd 2778	. . 3 ⊢ (𝜑 → ((𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) × 𝐴) = (𝑅 Σ_g (𝑘 ∈ (0...(𝑁 + 1)) ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))
110	109	adantr 480	. 2 ⊢ ((𝜑 ∧ 𝜓) → ((𝑅 Σ_g (𝑘 ∈ (0...𝑁) ↦ ((𝑁C𝑘) · (((𝑁 − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))) × 𝐴) = (𝑅 Σ_g (𝑘 ∈ (0...(𝑁 + 1)) ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))
111	3, 110	eqtrd 2771	1 ⊢ ((𝜑 ∧ 𝜓) → ((𝑁 ↑ (𝐴 + 𝐵)) × 𝐴) = (𝑅 Σ_g (𝑘 ∈ (0...(𝑁 + 1)) ↦ ((𝑁C𝑘) · ((((𝑁 + 1) − 𝑘) ↑ 𝐴) × (𝑘 ↑ 𝐵))))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 ∨ wo 844 = wceq 1540 ∈ wcel 2105 Vcvv 3473 {csn 4629 class class class wbr 5149 ↦ cmpt 5232 ‘cfv 6544 (class class class)co 7412 ℂcc 11111 0cc0 11113 1c1 11114 + caddc 11116 < clt 11253 − cmin 11449 ℕ₀cn0 12477 ℤcz 12563 ...cfz 13489 Ccbc 14267 Basecbs 17149 +_gcplusg 17202 ._rcmulr 17203 0_gc0g 17390 Σ_g cgsu 17391 Mndcmnd 18660 ._gcmg 18987 CMndccmn 19690 mulGrpcmgp 20029 SRingcsrg 20081

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2702 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7728 ax-cnex 11169 ax-resscn 11170 ax-1cn 11171 ax-icn 11172 ax-addcl 11173 ax-addrcl 11174 ax-mulcl 11175 ax-mulrcl 11176 ax-mulcom 11177 ax-addass 11178 ax-mulass 11179 ax-distr 11180 ax-i2m1 11181 ax-1ne0 11182 ax-1rid 11183 ax-rnegex 11184 ax-rrecex 11185 ax-cnre 11186 ax-pre-lttri 11187 ax-pre-lttrn 11188 ax-pre-ltadd 11189 ax-pre-mulgt0 11190

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-nfc 2884 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3375 df-reu 3376 df-rab 3432 df-v 3475 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-int 4952 df-iun 5000 df-iin 5001 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-se 5633 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-isom 6553 df-riota 7368 df-ov 7415 df-oprab 7416 df-mpo 7417 df-of 7673 df-om 7859 df-1st 7978 df-2nd 7979 df-supp 8150 df-frecs 8269 df-wrecs 8300 df-recs 8374 df-rdg 8413 df-1o 8469 df-er 8706 df-map 8825 df-en 8943 df-dom 8944 df-sdom 8945 df-fin 8946 df-fsupp 9365 df-oi 9508 df-card 9937 df-pnf 11255 df-mnf 11256 df-xr 11257 df-ltxr 11258 df-le 11259 df-sub 11451 df-neg 11452 df-div 11877 df-nn 12218 df-2 12280 df-n0 12478 df-z 12564 df-uz 12828 df-rp 12980 df-fz 13490 df-fzo 13633 df-seq 13972 df-fac 14239 df-bc 14268 df-hash 14296 df-sets 17102 df-slot 17120 df-ndx 17132 df-base 17150 df-ress 17179 df-plusg 17215 df-0g 17392 df-gsum 17393 df-mre 17535 df-mrc 17536 df-acs 17538 df-mgm 18566 df-sgrp 18645 df-mnd 18661 df-mhm 18706 df-submnd 18707 df-mulg 18988 df-cntz 19223 df-cmn 19692 df-mgp 20030 df-ur 20077 df-srg 20082

This theorem is referenced by: srgbinomlem 20125

W3C validator