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Theorem cvg1nlemcau 11011

Description: Lemma for cvg1n 11013. By selecting spaced out terms for the modified sequence 𝐺, the terms are within 1 / 𝑛 (without the constant 𝐶). (Contributed by Jim Kingdon, 1-Aug-2021.)

**Hypotheses**
Ref	Expression
cvg1n.f	⊢ (𝜑 → 𝐹:ℕ⟶ℝ)
cvg1n.c	⊢ (𝜑 → 𝐶 ∈ ℝ⁺)
cvg1n.cau	⊢ (𝜑 → ∀𝑛 ∈ ℕ ∀𝑘 ∈ (ℤ_≥‘𝑛)((𝐹‘𝑛) < ((𝐹‘𝑘) + (𝐶 / 𝑛)) ∧ (𝐹‘𝑘) < ((𝐹‘𝑛) + (𝐶 / 𝑛))))
cvg1nlem.g	⊢ 𝐺 = (𝑗 ∈ ℕ ↦ (𝐹‘(𝑗 · 𝑍)))
cvg1nlem.z	⊢ (𝜑 → 𝑍 ∈ ℕ)
cvg1nlem.start	⊢ (𝜑 → 𝐶 < 𝑍)

**Assertion**
Ref	Expression
cvg1nlemcau	⊢ (𝜑 → ∀𝑛 ∈ ℕ ∀𝑘 ∈ (ℤ_≥‘𝑛)((𝐺‘𝑛) < ((𝐺‘𝑘) + (1 / 𝑛)) ∧ (𝐺‘𝑘) < ((𝐺‘𝑛) + (1 / 𝑛))))

Distinct variable groups: 𝐶,𝑛,𝑘 𝑛,𝐹,𝑗,𝑘 𝑗,𝑍 𝜑,𝑘,𝑛 Allowed substitution hints: 𝜑(𝑗) 𝐶(𝑗) 𝐺(𝑗,𝑘,𝑛) 𝑍(𝑘,𝑛)

Proof of Theorem cvg1nlemcau Dummy variables 𝑎 𝑏 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		simplr 528	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → 𝑛 ∈ ℕ)
2		cvg1n.f	. . . . . . . . 9 ⊢ (𝜑 → 𝐹:ℕ⟶ℝ)
3	2	ad2antrr 488	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → 𝐹:ℕ⟶ℝ)
4		cvg1nlem.z	. . . . . . . . . 10 ⊢ (𝜑 → 𝑍 ∈ ℕ)
5	4	ad2antrr 488	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → 𝑍 ∈ ℕ)
6	1, 5	nnmulcld 8986	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝑛 · 𝑍) ∈ ℕ)
7	3, 6	ffvelcdmd 5668	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝐹‘(𝑛 · 𝑍)) ∈ ℝ)
8		oveq1 5898	. . . . . . . . 9 ⊢ (𝑗 = 𝑛 → (𝑗 · 𝑍) = (𝑛 · 𝑍))
9	8	fveq2d 5534	. . . . . . . 8 ⊢ (𝑗 = 𝑛 → (𝐹‘(𝑗 · 𝑍)) = (𝐹‘(𝑛 · 𝑍)))
10		cvg1nlem.g	. . . . . . . 8 ⊢ 𝐺 = (𝑗 ∈ ℕ ↦ (𝐹‘(𝑗 · 𝑍)))
11	9, 10	fvmptg 5608	. . . . . . 7 ⊢ ((𝑛 ∈ ℕ ∧ (𝐹‘(𝑛 · 𝑍)) ∈ ℝ) → (𝐺‘𝑛) = (𝐹‘(𝑛 · 𝑍)))
12	1, 7, 11	syl2anc 411	. . . . . 6 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝐺‘𝑛) = (𝐹‘(𝑛 · 𝑍)))
13	12, 7	eqeltrd 2266	. . . . 5 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝐺‘𝑛) ∈ ℝ)
14		eluznn 9618	. . . . . . . . 9 ⊢ ((𝑛 ∈ ℕ ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → 𝑘 ∈ ℕ)
15	14	adantll 476	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → 𝑘 ∈ ℕ)
16	15, 5	nnmulcld 8986	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝑘 · 𝑍) ∈ ℕ)
17	3, 16	ffvelcdmd 5668	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝐹‘(𝑘 · 𝑍)) ∈ ℝ)
18		oveq1 5898	. . . . . . . . . 10 ⊢ (𝑗 = 𝑘 → (𝑗 · 𝑍) = (𝑘 · 𝑍))
19	18	fveq2d 5534	. . . . . . . . 9 ⊢ (𝑗 = 𝑘 → (𝐹‘(𝑗 · 𝑍)) = (𝐹‘(𝑘 · 𝑍)))
20	19, 10	fvmptg 5608	. . . . . . . 8 ⊢ ((𝑘 ∈ ℕ ∧ (𝐹‘(𝑘 · 𝑍)) ∈ ℝ) → (𝐺‘𝑘) = (𝐹‘(𝑘 · 𝑍)))
21	15, 17, 20	syl2anc 411	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝐺‘𝑘) = (𝐹‘(𝑘 · 𝑍)))
22	21, 17	eqeltrd 2266	. . . . . 6 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝐺‘𝑘) ∈ ℝ)
23		cvg1n.c	. . . . . . . . 9 ⊢ (𝜑 → 𝐶 ∈ ℝ⁺)
24	23	rpred 9714	. . . . . . . 8 ⊢ (𝜑 → 𝐶 ∈ ℝ)
25	24	ad2antrr 488	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → 𝐶 ∈ ℝ)
26	25, 6	nndivred 8987	. . . . . 6 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝐶 / (𝑛 · 𝑍)) ∈ ℝ)
27	22, 26	readdcld 8005	. . . . 5 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐺‘𝑘) + (𝐶 / (𝑛 · 𝑍))) ∈ ℝ)
28	1	nnrecred 8984	. . . . . 6 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (1 / 𝑛) ∈ ℝ)
29	22, 28	readdcld 8005	. . . . 5 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐺‘𝑘) + (1 / 𝑛)) ∈ ℝ)
30		fveq2 5530	. . . . . . . . . . . 12 ⊢ (𝑏 = (𝑘 · 𝑍) → (𝐹‘𝑏) = (𝐹‘(𝑘 · 𝑍)))
31	30	oveq1d 5906	. . . . . . . . . . 11 ⊢ (𝑏 = (𝑘 · 𝑍) → ((𝐹‘𝑏) + (𝐶 / (𝑛 · 𝑍))) = ((𝐹‘(𝑘 · 𝑍)) + (𝐶 / (𝑛 · 𝑍))))
32	31	breq2d 4030	. . . . . . . . . 10 ⊢ (𝑏 = (𝑘 · 𝑍) → ((𝐹‘(𝑛 · 𝑍)) < ((𝐹‘𝑏) + (𝐶 / (𝑛 · 𝑍))) ↔ (𝐹‘(𝑛 · 𝑍)) < ((𝐹‘(𝑘 · 𝑍)) + (𝐶 / (𝑛 · 𝑍)))))
33	30	breq1d 4028	. . . . . . . . . 10 ⊢ (𝑏 = (𝑘 · 𝑍) → ((𝐹‘𝑏) < ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍))) ↔ (𝐹‘(𝑘 · 𝑍)) < ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍)))))
34	32, 33	anbi12d 473	. . . . . . . . 9 ⊢ (𝑏 = (𝑘 · 𝑍) → (((𝐹‘(𝑛 · 𝑍)) < ((𝐹‘𝑏) + (𝐶 / (𝑛 · 𝑍))) ∧ (𝐹‘𝑏) < ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍)))) ↔ ((𝐹‘(𝑛 · 𝑍)) < ((𝐹‘(𝑘 · 𝑍)) + (𝐶 / (𝑛 · 𝑍))) ∧ (𝐹‘(𝑘 · 𝑍)) < ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍))))))
35		fveq2 5530	. . . . . . . . . . 11 ⊢ (𝑎 = (𝑛 · 𝑍) → (ℤ_≥‘𝑎) = (ℤ_≥‘(𝑛 · 𝑍)))
36		fveq2 5530	. . . . . . . . . . . . 13 ⊢ (𝑎 = (𝑛 · 𝑍) → (𝐹‘𝑎) = (𝐹‘(𝑛 · 𝑍)))
37		oveq2 5899	. . . . . . . . . . . . . 14 ⊢ (𝑎 = (𝑛 · 𝑍) → (𝐶 / 𝑎) = (𝐶 / (𝑛 · 𝑍)))
38	37	oveq2d 5907	. . . . . . . . . . . . 13 ⊢ (𝑎 = (𝑛 · 𝑍) → ((𝐹‘𝑏) + (𝐶 / 𝑎)) = ((𝐹‘𝑏) + (𝐶 / (𝑛 · 𝑍))))
39	36, 38	breq12d 4031	. . . . . . . . . . . 12 ⊢ (𝑎 = (𝑛 · 𝑍) → ((𝐹‘𝑎) < ((𝐹‘𝑏) + (𝐶 / 𝑎)) ↔ (𝐹‘(𝑛 · 𝑍)) < ((𝐹‘𝑏) + (𝐶 / (𝑛 · 𝑍)))))
40	36, 37	oveq12d 5909	. . . . . . . . . . . . 13 ⊢ (𝑎 = (𝑛 · 𝑍) → ((𝐹‘𝑎) + (𝐶 / 𝑎)) = ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍))))
41	40	breq2d 4030	. . . . . . . . . . . 12 ⊢ (𝑎 = (𝑛 · 𝑍) → ((𝐹‘𝑏) < ((𝐹‘𝑎) + (𝐶 / 𝑎)) ↔ (𝐹‘𝑏) < ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍)))))
42	39, 41	anbi12d 473	. . . . . . . . . . 11 ⊢ (𝑎 = (𝑛 · 𝑍) → (((𝐹‘𝑎) < ((𝐹‘𝑏) + (𝐶 / 𝑎)) ∧ (𝐹‘𝑏) < ((𝐹‘𝑎) + (𝐶 / 𝑎))) ↔ ((𝐹‘(𝑛 · 𝑍)) < ((𝐹‘𝑏) + (𝐶 / (𝑛 · 𝑍))) ∧ (𝐹‘𝑏) < ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍))))))
43	35, 42	raleqbidv 2698	. . . . . . . . . 10 ⊢ (𝑎 = (𝑛 · 𝑍) → (∀𝑏 ∈ (ℤ_≥‘𝑎)((𝐹‘𝑎) < ((𝐹‘𝑏) + (𝐶 / 𝑎)) ∧ (𝐹‘𝑏) < ((𝐹‘𝑎) + (𝐶 / 𝑎))) ↔ ∀𝑏 ∈ (ℤ_≥‘(𝑛 · 𝑍))((𝐹‘(𝑛 · 𝑍)) < ((𝐹‘𝑏) + (𝐶 / (𝑛 · 𝑍))) ∧ (𝐹‘𝑏) < ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍))))))
44		cvg1n.cau	. . . . . . . . . . . 12 ⊢ (𝜑 → ∀𝑛 ∈ ℕ ∀𝑘 ∈ (ℤ_≥‘𝑛)((𝐹‘𝑛) < ((𝐹‘𝑘) + (𝐶 / 𝑛)) ∧ (𝐹‘𝑘) < ((𝐹‘𝑛) + (𝐶 / 𝑛))))
45		fveq2 5530	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 = 𝑏 → (𝐹‘𝑘) = (𝐹‘𝑏))
46	45	oveq1d 5906	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 = 𝑏 → ((𝐹‘𝑘) + (𝐶 / 𝑛)) = ((𝐹‘𝑏) + (𝐶 / 𝑛)))
47	46	breq2d 4030	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 = 𝑏 → ((𝐹‘𝑛) < ((𝐹‘𝑘) + (𝐶 / 𝑛)) ↔ (𝐹‘𝑛) < ((𝐹‘𝑏) + (𝐶 / 𝑛))))
48	45	breq1d 4028	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 = 𝑏 → ((𝐹‘𝑘) < ((𝐹‘𝑛) + (𝐶 / 𝑛)) ↔ (𝐹‘𝑏) < ((𝐹‘𝑛) + (𝐶 / 𝑛))))
49	47, 48	anbi12d 473	. . . . . . . . . . . . . . 15 ⊢ (𝑘 = 𝑏 → (((𝐹‘𝑛) < ((𝐹‘𝑘) + (𝐶 / 𝑛)) ∧ (𝐹‘𝑘) < ((𝐹‘𝑛) + (𝐶 / 𝑛))) ↔ ((𝐹‘𝑛) < ((𝐹‘𝑏) + (𝐶 / 𝑛)) ∧ (𝐹‘𝑏) < ((𝐹‘𝑛) + (𝐶 / 𝑛)))))
50	49	cbvralv 2718	. . . . . . . . . . . . . 14 ⊢ (∀𝑘 ∈ (ℤ_≥‘𝑛)((𝐹‘𝑛) < ((𝐹‘𝑘) + (𝐶 / 𝑛)) ∧ (𝐹‘𝑘) < ((𝐹‘𝑛) + (𝐶 / 𝑛))) ↔ ∀𝑏 ∈ (ℤ_≥‘𝑛)((𝐹‘𝑛) < ((𝐹‘𝑏) + (𝐶 / 𝑛)) ∧ (𝐹‘𝑏) < ((𝐹‘𝑛) + (𝐶 / 𝑛))))
51	50	ralbii 2496	. . . . . . . . . . . . 13 ⊢ (∀𝑛 ∈ ℕ ∀𝑘 ∈ (ℤ_≥‘𝑛)((𝐹‘𝑛) < ((𝐹‘𝑘) + (𝐶 / 𝑛)) ∧ (𝐹‘𝑘) < ((𝐹‘𝑛) + (𝐶 / 𝑛))) ↔ ∀𝑛 ∈ ℕ ∀𝑏 ∈ (ℤ_≥‘𝑛)((𝐹‘𝑛) < ((𝐹‘𝑏) + (𝐶 / 𝑛)) ∧ (𝐹‘𝑏) < ((𝐹‘𝑛) + (𝐶 / 𝑛))))
52		fveq2 5530	. . . . . . . . . . . . . . 15 ⊢ (𝑛 = 𝑎 → (ℤ_≥‘𝑛) = (ℤ_≥‘𝑎))
53		fveq2 5530	. . . . . . . . . . . . . . . . 17 ⊢ (𝑛 = 𝑎 → (𝐹‘𝑛) = (𝐹‘𝑎))
54		oveq2 5899	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑛 = 𝑎 → (𝐶 / 𝑛) = (𝐶 / 𝑎))
55	54	oveq2d 5907	. . . . . . . . . . . . . . . . 17 ⊢ (𝑛 = 𝑎 → ((𝐹‘𝑏) + (𝐶 / 𝑛)) = ((𝐹‘𝑏) + (𝐶 / 𝑎)))
56	53, 55	breq12d 4031	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 = 𝑎 → ((𝐹‘𝑛) < ((𝐹‘𝑏) + (𝐶 / 𝑛)) ↔ (𝐹‘𝑎) < ((𝐹‘𝑏) + (𝐶 / 𝑎))))
57	53, 54	oveq12d 5909	. . . . . . . . . . . . . . . . 17 ⊢ (𝑛 = 𝑎 → ((𝐹‘𝑛) + (𝐶 / 𝑛)) = ((𝐹‘𝑎) + (𝐶 / 𝑎)))
58	57	breq2d 4030	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 = 𝑎 → ((𝐹‘𝑏) < ((𝐹‘𝑛) + (𝐶 / 𝑛)) ↔ (𝐹‘𝑏) < ((𝐹‘𝑎) + (𝐶 / 𝑎))))
59	56, 58	anbi12d 473	. . . . . . . . . . . . . . 15 ⊢ (𝑛 = 𝑎 → (((𝐹‘𝑛) < ((𝐹‘𝑏) + (𝐶 / 𝑛)) ∧ (𝐹‘𝑏) < ((𝐹‘𝑛) + (𝐶 / 𝑛))) ↔ ((𝐹‘𝑎) < ((𝐹‘𝑏) + (𝐶 / 𝑎)) ∧ (𝐹‘𝑏) < ((𝐹‘𝑎) + (𝐶 / 𝑎)))))
60	52, 59	raleqbidv 2698	. . . . . . . . . . . . . 14 ⊢ (𝑛 = 𝑎 → (∀𝑏 ∈ (ℤ_≥‘𝑛)((𝐹‘𝑛) < ((𝐹‘𝑏) + (𝐶 / 𝑛)) ∧ (𝐹‘𝑏) < ((𝐹‘𝑛) + (𝐶 / 𝑛))) ↔ ∀𝑏 ∈ (ℤ_≥‘𝑎)((𝐹‘𝑎) < ((𝐹‘𝑏) + (𝐶 / 𝑎)) ∧ (𝐹‘𝑏) < ((𝐹‘𝑎) + (𝐶 / 𝑎)))))
61	60	cbvralv 2718	. . . . . . . . . . . . 13 ⊢ (∀𝑛 ∈ ℕ ∀𝑏 ∈ (ℤ_≥‘𝑛)((𝐹‘𝑛) < ((𝐹‘𝑏) + (𝐶 / 𝑛)) ∧ (𝐹‘𝑏) < ((𝐹‘𝑛) + (𝐶 / 𝑛))) ↔ ∀𝑎 ∈ ℕ ∀𝑏 ∈ (ℤ_≥‘𝑎)((𝐹‘𝑎) < ((𝐹‘𝑏) + (𝐶 / 𝑎)) ∧ (𝐹‘𝑏) < ((𝐹‘𝑎) + (𝐶 / 𝑎))))
62	51, 61	bitri 184	. . . . . . . . . . . 12 ⊢ (∀𝑛 ∈ ℕ ∀𝑘 ∈ (ℤ_≥‘𝑛)((𝐹‘𝑛) < ((𝐹‘𝑘) + (𝐶 / 𝑛)) ∧ (𝐹‘𝑘) < ((𝐹‘𝑛) + (𝐶 / 𝑛))) ↔ ∀𝑎 ∈ ℕ ∀𝑏 ∈ (ℤ_≥‘𝑎)((𝐹‘𝑎) < ((𝐹‘𝑏) + (𝐶 / 𝑎)) ∧ (𝐹‘𝑏) < ((𝐹‘𝑎) + (𝐶 / 𝑎))))
63	44, 62	sylib 122	. . . . . . . . . . 11 ⊢ (𝜑 → ∀𝑎 ∈ ℕ ∀𝑏 ∈ (ℤ_≥‘𝑎)((𝐹‘𝑎) < ((𝐹‘𝑏) + (𝐶 / 𝑎)) ∧ (𝐹‘𝑏) < ((𝐹‘𝑎) + (𝐶 / 𝑎))))
64	63	ad2antrr 488	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ∀𝑎 ∈ ℕ ∀𝑏 ∈ (ℤ_≥‘𝑎)((𝐹‘𝑎) < ((𝐹‘𝑏) + (𝐶 / 𝑎)) ∧ (𝐹‘𝑏) < ((𝐹‘𝑎) + (𝐶 / 𝑎))))
65	43, 64, 6	rspcdva 2861	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ∀𝑏 ∈ (ℤ_≥‘(𝑛 · 𝑍))((𝐹‘(𝑛 · 𝑍)) < ((𝐹‘𝑏) + (𝐶 / (𝑛 · 𝑍))) ∧ (𝐹‘𝑏) < ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍)))))
66		eluzle 9558	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ (ℤ_≥‘𝑛) → 𝑛 ≤ 𝑘)
67	66	adantl 277	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → 𝑛 ≤ 𝑘)
68	1	nnred 8950	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → 𝑛 ∈ ℝ)
69	15	nnred 8950	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → 𝑘 ∈ ℝ)
70	5	nnrpd 9712	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → 𝑍 ∈ ℝ⁺)
71	68, 69, 70	lemul1d 9758	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝑛 ≤ 𝑘 ↔ (𝑛 · 𝑍) ≤ (𝑘 · 𝑍)))
72	67, 71	mpbid 147	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝑛 · 𝑍) ≤ (𝑘 · 𝑍))
73	6	nnzd 9392	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝑛 · 𝑍) ∈ ℤ)
74	16	nnzd 9392	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝑘 · 𝑍) ∈ ℤ)
75		eluz 9559	. . . . . . . . . . 11 ⊢ (((𝑛 · 𝑍) ∈ ℤ ∧ (𝑘 · 𝑍) ∈ ℤ) → ((𝑘 · 𝑍) ∈ (ℤ_≥‘(𝑛 · 𝑍)) ↔ (𝑛 · 𝑍) ≤ (𝑘 · 𝑍)))
76	73, 74, 75	syl2anc 411	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝑘 · 𝑍) ∈ (ℤ_≥‘(𝑛 · 𝑍)) ↔ (𝑛 · 𝑍) ≤ (𝑘 · 𝑍)))
77	72, 76	mpbird 167	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝑘 · 𝑍) ∈ (ℤ_≥‘(𝑛 · 𝑍)))
78	34, 65, 77	rspcdva 2861	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐹‘(𝑛 · 𝑍)) < ((𝐹‘(𝑘 · 𝑍)) + (𝐶 / (𝑛 · 𝑍))) ∧ (𝐹‘(𝑘 · 𝑍)) < ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍)))))
79	21	oveq1d 5906	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐺‘𝑘) + (𝐶 / (𝑛 · 𝑍))) = ((𝐹‘(𝑘 · 𝑍)) + (𝐶 / (𝑛 · 𝑍))))
80	79	breq2d 4030	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐹‘(𝑛 · 𝑍)) < ((𝐺‘𝑘) + (𝐶 / (𝑛 · 𝑍))) ↔ (𝐹‘(𝑛 · 𝑍)) < ((𝐹‘(𝑘 · 𝑍)) + (𝐶 / (𝑛 · 𝑍)))))
81	21	breq1d 4028	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐺‘𝑘) < ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍))) ↔ (𝐹‘(𝑘 · 𝑍)) < ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍)))))
82	80, 81	anbi12d 473	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (((𝐹‘(𝑛 · 𝑍)) < ((𝐺‘𝑘) + (𝐶 / (𝑛 · 𝑍))) ∧ (𝐺‘𝑘) < ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍)))) ↔ ((𝐹‘(𝑛 · 𝑍)) < ((𝐹‘(𝑘 · 𝑍)) + (𝐶 / (𝑛 · 𝑍))) ∧ (𝐹‘(𝑘 · 𝑍)) < ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍))))))
83	78, 82	mpbird 167	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐹‘(𝑛 · 𝑍)) < ((𝐺‘𝑘) + (𝐶 / (𝑛 · 𝑍))) ∧ (𝐺‘𝑘) < ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍)))))
84	12	breq1d 4028	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐺‘𝑛) < ((𝐺‘𝑘) + (𝐶 / (𝑛 · 𝑍))) ↔ (𝐹‘(𝑛 · 𝑍)) < ((𝐺‘𝑘) + (𝐶 / (𝑛 · 𝑍)))))
85	12	oveq1d 5906	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐺‘𝑛) + (𝐶 / (𝑛 · 𝑍))) = ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍))))
86	85	breq2d 4030	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐺‘𝑘) < ((𝐺‘𝑛) + (𝐶 / (𝑛 · 𝑍))) ↔ (𝐺‘𝑘) < ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍)))))
87	84, 86	anbi12d 473	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (((𝐺‘𝑛) < ((𝐺‘𝑘) + (𝐶 / (𝑛 · 𝑍))) ∧ (𝐺‘𝑘) < ((𝐺‘𝑛) + (𝐶 / (𝑛 · 𝑍)))) ↔ ((𝐹‘(𝑛 · 𝑍)) < ((𝐺‘𝑘) + (𝐶 / (𝑛 · 𝑍))) ∧ (𝐺‘𝑘) < ((𝐹‘(𝑛 · 𝑍)) + (𝐶 / (𝑛 · 𝑍))))))
88	83, 87	mpbird 167	. . . . . 6 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐺‘𝑛) < ((𝐺‘𝑘) + (𝐶 / (𝑛 · 𝑍))) ∧ (𝐺‘𝑘) < ((𝐺‘𝑛) + (𝐶 / (𝑛 · 𝑍)))))
89	88	simpld 112	. . . . 5 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝐺‘𝑛) < ((𝐺‘𝑘) + (𝐶 / (𝑛 · 𝑍))))
90	5	nnred 8950	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → 𝑍 ∈ ℝ)
91	1	nnrpd 9712	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → 𝑛 ∈ ℝ⁺)
92		cvg1nlem.start	. . . . . . . . 9 ⊢ (𝜑 → 𝐶 < 𝑍)
93	92	ad2antrr 488	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → 𝐶 < 𝑍)
94	25, 90, 91, 93	ltmul1dd 9770	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝐶 · 𝑛) < (𝑍 · 𝑛))
95	6	nncnd 8951	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝑛 · 𝑍) ∈ ℂ)
96	95	mulid2d 7994	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (1 · (𝑛 · 𝑍)) = (𝑛 · 𝑍))
97	96	breq2d 4030	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐶 · 𝑛) < (1 · (𝑛 · 𝑍)) ↔ (𝐶 · 𝑛) < (𝑛 · 𝑍)))
98		1red 7990	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → 1 ∈ ℝ)
99	6	nnrpd 9712	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝑛 · 𝑍) ∈ ℝ⁺)
100	25, 91, 98, 99	lt2mul2divd 9783	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐶 · 𝑛) < (1 · (𝑛 · 𝑍)) ↔ (𝐶 / (𝑛 · 𝑍)) < (1 / 𝑛)))
101	1	nncnd 8951	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → 𝑛 ∈ ℂ)
102	5	nncnd 8951	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → 𝑍 ∈ ℂ)
103	101, 102	mulcomd 7997	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝑛 · 𝑍) = (𝑍 · 𝑛))
104	103	breq2d 4030	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐶 · 𝑛) < (𝑛 · 𝑍) ↔ (𝐶 · 𝑛) < (𝑍 · 𝑛)))
105	97, 100, 104	3bitr3d 218	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐶 / (𝑛 · 𝑍)) < (1 / 𝑛) ↔ (𝐶 · 𝑛) < (𝑍 · 𝑛)))
106	94, 105	mpbird 167	. . . . . 6 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝐶 / (𝑛 · 𝑍)) < (1 / 𝑛))
107	26, 28, 22, 106	ltadd2dd 8397	. . . . 5 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐺‘𝑘) + (𝐶 / (𝑛 · 𝑍))) < ((𝐺‘𝑘) + (1 / 𝑛)))
108	13, 27, 29, 89, 107	lttrd 8101	. . . 4 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝐺‘𝑛) < ((𝐺‘𝑘) + (1 / 𝑛)))
109	13, 26	readdcld 8005	. . . . 5 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐺‘𝑛) + (𝐶 / (𝑛 · 𝑍))) ∈ ℝ)
110	13, 28	readdcld 8005	. . . . 5 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐺‘𝑛) + (1 / 𝑛)) ∈ ℝ)
111	88	simprd 114	. . . . 5 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝐺‘𝑘) < ((𝐺‘𝑛) + (𝐶 / (𝑛 · 𝑍))))
112	26, 28, 13, 106	ltadd2dd 8397	. . . . 5 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐺‘𝑛) + (𝐶 / (𝑛 · 𝑍))) < ((𝐺‘𝑛) + (1 / 𝑛)))
113	22, 109, 110, 111, 112	lttrd 8101	. . . 4 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → (𝐺‘𝑘) < ((𝐺‘𝑛) + (1 / 𝑛)))
114	108, 113	jca 306	. . 3 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ_≥‘𝑛)) → ((𝐺‘𝑛) < ((𝐺‘𝑘) + (1 / 𝑛)) ∧ (𝐺‘𝑘) < ((𝐺‘𝑛) + (1 / 𝑛))))
115	114	ralrimiva 2563	. 2 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → ∀𝑘 ∈ (ℤ_≥‘𝑛)((𝐺‘𝑛) < ((𝐺‘𝑘) + (1 / 𝑛)) ∧ (𝐺‘𝑘) < ((𝐺‘𝑛) + (1 / 𝑛))))
116	115	ralrimiva 2563	1 ⊢ (𝜑 → ∀𝑛 ∈ ℕ ∀𝑘 ∈ (ℤ_≥‘𝑛)((𝐺‘𝑛) < ((𝐺‘𝑘) + (1 / 𝑛)) ∧ (𝐺‘𝑘) < ((𝐺‘𝑛) + (1 / 𝑛))))

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1364 ∈ wcel 2160 ∀wral 2468 class class class wbr 4018 ↦ cmpt 4079 ⟶wf 5227 ‘cfv 5231 (class class class)co 5891 ℝcr 7828 1c1 7830 + caddc 7832 · cmul 7834 < clt 8010 ≤ cle 8011 / cdiv 8647 ℕcn 8937 ℤcz 9271 ℤ_≥cuz 9546 ℝ⁺crp 9671

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 615 ax-in2 616 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2162 ax-14 2163 ax-ext 2171 ax-sep 4136 ax-pow 4189 ax-pr 4224 ax-un 4448 ax-setind 4551 ax-cnex 7920 ax-resscn 7921 ax-1cn 7922 ax-1re 7923 ax-icn 7924 ax-addcl 7925 ax-addrcl 7926 ax-mulcl 7927 ax-mulrcl 7928 ax-addcom 7929 ax-mulcom 7930 ax-addass 7931 ax-mulass 7932 ax-distr 7933 ax-i2m1 7934 ax-0lt1 7935 ax-1rid 7936 ax-0id 7937 ax-rnegex 7938 ax-precex 7939 ax-cnre 7940 ax-pre-ltirr 7941 ax-pre-ltwlin 7942 ax-pre-lttrn 7943 ax-pre-apti 7944 ax-pre-ltadd 7945 ax-pre-mulgt0 7946 ax-pre-mulext 7947

This theorem depends on definitions: df-bi 117 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2041 df-mo 2042 df-clab 2176 df-cleq 2182 df-clel 2185 df-nfc 2321 df-ne 2361 df-nel 2456 df-ral 2473 df-rex 2474 df-reu 2475 df-rmo 2476 df-rab 2477 df-v 2754 df-sbc 2978 df-dif 3146 df-un 3148 df-in 3150 df-ss 3157 df-pw 3592 df-sn 3613 df-pr 3614 df-op 3616 df-uni 3825 df-int 3860 df-br 4019 df-opab 4080 df-mpt 4081 df-id 4308 df-po 4311 df-iso 4312 df-xp 4647 df-rel 4648 df-cnv 4649 df-co 4650 df-dm 4651 df-rn 4652 df-res 4653 df-ima 4654 df-iota 5193 df-fun 5233 df-fn 5234 df-f 5235 df-fv 5239 df-riota 5847 df-ov 5894 df-oprab 5895 df-mpo 5896 df-pnf 8012 df-mnf 8013 df-xr 8014 df-ltxr 8015 df-le 8016 df-sub 8148 df-neg 8149 df-reap 8550 df-ap 8557 df-div 8648 df-inn 8938 df-n0 9195 df-z 9272 df-uz 9547 df-rp 9672

This theorem is referenced by: cvg1nlemres 11012

W3C validator