bfplem1 - Mathbox for Jeff Madsen

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Theorem bfplem1 37806

Description: Lemma for bfp 37808. The sequence 𝐺, which simply starts from any point in the space and iterates 𝐹, satisfies the property that the distance from 𝐺(𝑛) to 𝐺(𝑛 + 1) decreases by at least 𝐾 after each step. Thus, the total distance from any 𝐺(𝑖) to 𝐺(𝑗) is bounded by a geometric series, and the sequence is Cauchy. Therefore, it converges to a point ((⇝_𝑡‘𝐽)‘𝐺) since the space is complete. (Contributed by Jeff Madsen, 17-Jun-2014.)

**Hypotheses**
Ref	Expression
bfp.2	⊢ (𝜑 → 𝐷 ∈ (CMet‘𝑋))
bfp.3	⊢ (𝜑 → 𝑋 ≠ ∅)
bfp.4	⊢ (𝜑 → 𝐾 ∈ ℝ⁺)
bfp.5	⊢ (𝜑 → 𝐾 < 1)
bfp.6	⊢ (𝜑 → 𝐹:𝑋⟶𝑋)
bfp.7	⊢ ((𝜑 ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) → ((𝐹‘𝑥)𝐷(𝐹‘𝑦)) ≤ (𝐾 · (𝑥𝐷𝑦)))
bfp.8	⊢ 𝐽 = (MetOpen‘𝐷)
bfp.9	⊢ (𝜑 → 𝐴 ∈ 𝑋)
bfp.10	⊢ 𝐺 = seq1((𝐹 ∘ 1^st ), (ℕ × {𝐴}))

**Assertion**
Ref	Expression
bfplem1	⊢ (𝜑 → 𝐺(⇝_𝑡‘𝐽)((⇝_𝑡‘𝐽)‘𝐺))

Distinct variable groups: 𝑥,𝑦,𝐷 𝑥,𝐺,𝑦 𝑥,𝐽,𝑦 𝜑,𝑥,𝑦 𝑥,𝐹,𝑦 𝑥,𝐾,𝑦 𝑥,𝑋,𝑦 Allowed substitution hints: 𝐴(𝑥,𝑦)

Proof of Theorem bfplem1 Dummy variables 𝑗 𝑘 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		bfp.2	. . 3 ⊢ (𝜑 → 𝐷 ∈ (CMet‘𝑋))
2		cmetmet 25184	. . . . 5 ⊢ (𝐷 ∈ (CMet‘𝑋) → 𝐷 ∈ (Met‘𝑋))
3	1, 2	syl 17	. . . 4 ⊢ (𝜑 → 𝐷 ∈ (Met‘𝑋))
4		nnuz 12778	. . . . 5 ⊢ ℕ = (ℤ_≥‘1)
5		bfp.10	. . . . 5 ⊢ 𝐺 = seq1((𝐹 ∘ 1^st ), (ℕ × {𝐴}))
6		1zzd 12506	. . . . 5 ⊢ (𝜑 → 1 ∈ ℤ)
7		bfp.9	. . . . 5 ⊢ (𝜑 → 𝐴 ∈ 𝑋)
8		bfp.6	. . . . 5 ⊢ (𝜑 → 𝐹:𝑋⟶𝑋)
9	4, 5, 6, 7, 8	algrf 16484	. . . 4 ⊢ (𝜑 → 𝐺:ℕ⟶𝑋)
10	8, 7	ffvelcdmd 7019	. . . . . 6 ⊢ (𝜑 → (𝐹‘𝐴) ∈ 𝑋)
11		metcl 24218	. . . . . 6 ⊢ ((𝐷 ∈ (Met‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ (𝐹‘𝐴) ∈ 𝑋) → (𝐴𝐷(𝐹‘𝐴)) ∈ ℝ)
12	3, 7, 10, 11	syl3anc 1373	. . . . 5 ⊢ (𝜑 → (𝐴𝐷(𝐹‘𝐴)) ∈ ℝ)
13		bfp.4	. . . . 5 ⊢ (𝜑 → 𝐾 ∈ ℝ⁺)
14	12, 13	rerpdivcld 12968	. . . 4 ⊢ (𝜑 → ((𝐴𝐷(𝐹‘𝐴)) / 𝐾) ∈ ℝ)
15		bfp.5	. . . 4 ⊢ (𝜑 → 𝐾 < 1)
16		fveq2 6822	. . . . . . . . 9 ⊢ (𝑗 = 1 → (𝐺‘𝑗) = (𝐺‘1))
17		fvoveq1 7372	. . . . . . . . 9 ⊢ (𝑗 = 1 → (𝐺‘(𝑗 + 1)) = (𝐺‘(1 + 1)))
18	16, 17	oveq12d 7367	. . . . . . . 8 ⊢ (𝑗 = 1 → ((𝐺‘𝑗)𝐷(𝐺‘(𝑗 + 1))) = ((𝐺‘1)𝐷(𝐺‘(1 + 1))))
19		oveq2 7357	. . . . . . . . 9 ⊢ (𝑗 = 1 → (𝐾↑𝑗) = (𝐾↑1))
20	19	oveq2d 7365	. . . . . . . 8 ⊢ (𝑗 = 1 → (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑗)) = (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑1)))
21	18, 20	breq12d 5105	. . . . . . 7 ⊢ (𝑗 = 1 → (((𝐺‘𝑗)𝐷(𝐺‘(𝑗 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑗)) ↔ ((𝐺‘1)𝐷(𝐺‘(1 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑1))))
22	21	imbi2d 340	. . . . . 6 ⊢ (𝑗 = 1 → ((𝜑 → ((𝐺‘𝑗)𝐷(𝐺‘(𝑗 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑗))) ↔ (𝜑 → ((𝐺‘1)𝐷(𝐺‘(1 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑1)))))
23		fveq2 6822	. . . . . . . . 9 ⊢ (𝑗 = 𝑘 → (𝐺‘𝑗) = (𝐺‘𝑘))
24		fvoveq1 7372	. . . . . . . . 9 ⊢ (𝑗 = 𝑘 → (𝐺‘(𝑗 + 1)) = (𝐺‘(𝑘 + 1)))
25	23, 24	oveq12d 7367	. . . . . . . 8 ⊢ (𝑗 = 𝑘 → ((𝐺‘𝑗)𝐷(𝐺‘(𝑗 + 1))) = ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))))
26		oveq2 7357	. . . . . . . . 9 ⊢ (𝑗 = 𝑘 → (𝐾↑𝑗) = (𝐾↑𝑘))
27	26	oveq2d 7365	. . . . . . . 8 ⊢ (𝑗 = 𝑘 → (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑗)) = (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘)))
28	25, 27	breq12d 5105	. . . . . . 7 ⊢ (𝑗 = 𝑘 → (((𝐺‘𝑗)𝐷(𝐺‘(𝑗 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑗)) ↔ ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘))))
29	28	imbi2d 340	. . . . . 6 ⊢ (𝑗 = 𝑘 → ((𝜑 → ((𝐺‘𝑗)𝐷(𝐺‘(𝑗 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑗))) ↔ (𝜑 → ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘)))))
30		fveq2 6822	. . . . . . . . 9 ⊢ (𝑗 = (𝑘 + 1) → (𝐺‘𝑗) = (𝐺‘(𝑘 + 1)))
31		fvoveq1 7372	. . . . . . . . 9 ⊢ (𝑗 = (𝑘 + 1) → (𝐺‘(𝑗 + 1)) = (𝐺‘((𝑘 + 1) + 1)))
32	30, 31	oveq12d 7367	. . . . . . . 8 ⊢ (𝑗 = (𝑘 + 1) → ((𝐺‘𝑗)𝐷(𝐺‘(𝑗 + 1))) = ((𝐺‘(𝑘 + 1))𝐷(𝐺‘((𝑘 + 1) + 1))))
33		oveq2 7357	. . . . . . . . 9 ⊢ (𝑗 = (𝑘 + 1) → (𝐾↑𝑗) = (𝐾↑(𝑘 + 1)))
34	33	oveq2d 7365	. . . . . . . 8 ⊢ (𝑗 = (𝑘 + 1) → (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑗)) = (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1))))
35	32, 34	breq12d 5105	. . . . . . 7 ⊢ (𝑗 = (𝑘 + 1) → (((𝐺‘𝑗)𝐷(𝐺‘(𝑗 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑗)) ↔ ((𝐺‘(𝑘 + 1))𝐷(𝐺‘((𝑘 + 1) + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1)))))
36	35	imbi2d 340	. . . . . 6 ⊢ (𝑗 = (𝑘 + 1) → ((𝜑 → ((𝐺‘𝑗)𝐷(𝐺‘(𝑗 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑗))) ↔ (𝜑 → ((𝐺‘(𝑘 + 1))𝐷(𝐺‘((𝑘 + 1) + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1))))))
37	12	leidd 11686	. . . . . . 7 ⊢ (𝜑 → (𝐴𝐷(𝐹‘𝐴)) ≤ (𝐴𝐷(𝐹‘𝐴)))
38	4, 5, 6, 7	algr0 16483	. . . . . . . 8 ⊢ (𝜑 → (𝐺‘1) = 𝐴)
39		1nn 12139	. . . . . . . . . 10 ⊢ 1 ∈ ℕ
40	4, 5, 6, 7, 8	algrp1 16485	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 1 ∈ ℕ) → (𝐺‘(1 + 1)) = (𝐹‘(𝐺‘1)))
41	39, 40	mpan2 691	. . . . . . . . 9 ⊢ (𝜑 → (𝐺‘(1 + 1)) = (𝐹‘(𝐺‘1)))
42	38	fveq2d 6826	. . . . . . . . 9 ⊢ (𝜑 → (𝐹‘(𝐺‘1)) = (𝐹‘𝐴))
43	41, 42	eqtrd 2764	. . . . . . . 8 ⊢ (𝜑 → (𝐺‘(1 + 1)) = (𝐹‘𝐴))
44	38, 43	oveq12d 7367	. . . . . . 7 ⊢ (𝜑 → ((𝐺‘1)𝐷(𝐺‘(1 + 1))) = (𝐴𝐷(𝐹‘𝐴)))
45	13	rpred 12937	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐾 ∈ ℝ)
46	45	recnd 11143	. . . . . . . . . 10 ⊢ (𝜑 → 𝐾 ∈ ℂ)
47	46	exp1d 14048	. . . . . . . . 9 ⊢ (𝜑 → (𝐾↑1) = 𝐾)
48	47	oveq2d 7365	. . . . . . . 8 ⊢ (𝜑 → (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑1)) = (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · 𝐾))
49	12	recnd 11143	. . . . . . . . 9 ⊢ (𝜑 → (𝐴𝐷(𝐹‘𝐴)) ∈ ℂ)
50	13	rpne0d 12942	. . . . . . . . 9 ⊢ (𝜑 → 𝐾 ≠ 0)
51	49, 46, 50	divcan1d 11901	. . . . . . . 8 ⊢ (𝜑 → (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · 𝐾) = (𝐴𝐷(𝐹‘𝐴)))
52	48, 51	eqtrd 2764	. . . . . . 7 ⊢ (𝜑 → (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑1)) = (𝐴𝐷(𝐹‘𝐴)))
53	37, 44, 52	3brtr4d 5124	. . . . . 6 ⊢ (𝜑 → ((𝐺‘1)𝐷(𝐺‘(1 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑1)))
54	9	ffvelcdmda 7018	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐺‘𝑘) ∈ 𝑋)
55		peano2nn 12140	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ ℕ → (𝑘 + 1) ∈ ℕ)
56		ffvelcdm 7015	. . . . . . . . . . . . 13 ⊢ ((𝐺:ℕ⟶𝑋 ∧ (𝑘 + 1) ∈ ℕ) → (𝐺‘(𝑘 + 1)) ∈ 𝑋)
57	9, 55, 56	syl2an 596	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐺‘(𝑘 + 1)) ∈ 𝑋)
58	54, 57	jca 511	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝐺‘𝑘) ∈ 𝑋 ∧ (𝐺‘(𝑘 + 1)) ∈ 𝑋))
59		bfp.7	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) → ((𝐹‘𝑥)𝐷(𝐹‘𝑦)) ≤ (𝐾 · (𝑥𝐷𝑦)))
60	59	ralrimivva 3172	. . . . . . . . . . . 12 ⊢ (𝜑 → ∀𝑥 ∈ 𝑋 ∀𝑦 ∈ 𝑋 ((𝐹‘𝑥)𝐷(𝐹‘𝑦)) ≤ (𝐾 · (𝑥𝐷𝑦)))
61	60	adantr 480	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ∀𝑥 ∈ 𝑋 ∀𝑦 ∈ 𝑋 ((𝐹‘𝑥)𝐷(𝐹‘𝑦)) ≤ (𝐾 · (𝑥𝐷𝑦)))
62		fveq2 6822	. . . . . . . . . . . . . 14 ⊢ (𝑥 = (𝐺‘𝑘) → (𝐹‘𝑥) = (𝐹‘(𝐺‘𝑘)))
63	62	oveq1d 7364	. . . . . . . . . . . . 13 ⊢ (𝑥 = (𝐺‘𝑘) → ((𝐹‘𝑥)𝐷(𝐹‘𝑦)) = ((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘𝑦)))
64		oveq1 7356	. . . . . . . . . . . . . 14 ⊢ (𝑥 = (𝐺‘𝑘) → (𝑥𝐷𝑦) = ((𝐺‘𝑘)𝐷𝑦))
65	64	oveq2d 7365	. . . . . . . . . . . . 13 ⊢ (𝑥 = (𝐺‘𝑘) → (𝐾 · (𝑥𝐷𝑦)) = (𝐾 · ((𝐺‘𝑘)𝐷𝑦)))
66	63, 65	breq12d 5105	. . . . . . . . . . . 12 ⊢ (𝑥 = (𝐺‘𝑘) → (((𝐹‘𝑥)𝐷(𝐹‘𝑦)) ≤ (𝐾 · (𝑥𝐷𝑦)) ↔ ((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘𝑦)) ≤ (𝐾 · ((𝐺‘𝑘)𝐷𝑦))))
67		fveq2 6822	. . . . . . . . . . . . . 14 ⊢ (𝑦 = (𝐺‘(𝑘 + 1)) → (𝐹‘𝑦) = (𝐹‘(𝐺‘(𝑘 + 1))))
68	67	oveq2d 7365	. . . . . . . . . . . . 13 ⊢ (𝑦 = (𝐺‘(𝑘 + 1)) → ((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘𝑦)) = ((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘(𝐺‘(𝑘 + 1)))))
69		oveq2 7357	. . . . . . . . . . . . . 14 ⊢ (𝑦 = (𝐺‘(𝑘 + 1)) → ((𝐺‘𝑘)𝐷𝑦) = ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))))
70	69	oveq2d 7365	. . . . . . . . . . . . 13 ⊢ (𝑦 = (𝐺‘(𝑘 + 1)) → (𝐾 · ((𝐺‘𝑘)𝐷𝑦)) = (𝐾 · ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1)))))
71	68, 70	breq12d 5105	. . . . . . . . . . . 12 ⊢ (𝑦 = (𝐺‘(𝑘 + 1)) → (((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘𝑦)) ≤ (𝐾 · ((𝐺‘𝑘)𝐷𝑦)) ↔ ((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘(𝐺‘(𝑘 + 1)))) ≤ (𝐾 · ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))))))
72	66, 71	rspc2v 3588	. . . . . . . . . . 11 ⊢ (((𝐺‘𝑘) ∈ 𝑋 ∧ (𝐺‘(𝑘 + 1)) ∈ 𝑋) → (∀𝑥 ∈ 𝑋 ∀𝑦 ∈ 𝑋 ((𝐹‘𝑥)𝐷(𝐹‘𝑦)) ≤ (𝐾 · (𝑥𝐷𝑦)) → ((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘(𝐺‘(𝑘 + 1)))) ≤ (𝐾 · ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))))))
73	58, 61, 72	sylc 65	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘(𝐺‘(𝑘 + 1)))) ≤ (𝐾 · ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1)))))
74	3	adantr 480	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝐷 ∈ (Met‘𝑋))
75	8	adantr 480	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝐹:𝑋⟶𝑋)
76	75, 54	ffvelcdmd 7019	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐹‘(𝐺‘𝑘)) ∈ 𝑋)
77	75, 57	ffvelcdmd 7019	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐹‘(𝐺‘(𝑘 + 1))) ∈ 𝑋)
78		metcl 24218	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (Met‘𝑋) ∧ (𝐹‘(𝐺‘𝑘)) ∈ 𝑋 ∧ (𝐹‘(𝐺‘(𝑘 + 1))) ∈ 𝑋) → ((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘(𝐺‘(𝑘 + 1)))) ∈ ℝ)
79	74, 76, 77, 78	syl3anc 1373	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘(𝐺‘(𝑘 + 1)))) ∈ ℝ)
80	45	adantr 480	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝐾 ∈ ℝ)
81		metcl 24218	. . . . . . . . . . . . 13 ⊢ ((𝐷 ∈ (Met‘𝑋) ∧ (𝐺‘𝑘) ∈ 𝑋 ∧ (𝐺‘(𝑘 + 1)) ∈ 𝑋) → ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) ∈ ℝ)
82	74, 54, 57, 81	syl3anc 1373	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) ∈ ℝ)
83	80, 82	remulcld 11145	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐾 · ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1)))) ∈ ℝ)
84	14	adantr 480	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝐴𝐷(𝐹‘𝐴)) / 𝐾) ∈ ℝ)
85	55	adantl 481	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑘 + 1) ∈ ℕ)
86	85	nnnn0d 12445	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑘 + 1) ∈ ℕ₀)
87	80, 86	reexpcld 14070	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐾↑(𝑘 + 1)) ∈ ℝ)
88	84, 87	remulcld 11145	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1))) ∈ ℝ)
89		letr 11210	. . . . . . . . . . 11 ⊢ ((((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘(𝐺‘(𝑘 + 1)))) ∈ ℝ ∧ (𝐾 · ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1)))) ∈ ℝ ∧ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1))) ∈ ℝ) → ((((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘(𝐺‘(𝑘 + 1)))) ≤ (𝐾 · ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1)))) ∧ (𝐾 · ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1)))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1)))) → ((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘(𝐺‘(𝑘 + 1)))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1)))))
90	79, 83, 88, 89	syl3anc 1373	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘(𝐺‘(𝑘 + 1)))) ≤ (𝐾 · ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1)))) ∧ (𝐾 · ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1)))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1)))) → ((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘(𝐺‘(𝑘 + 1)))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1)))))
91	73, 90	mpand 695	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝐾 · ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1)))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1))) → ((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘(𝐺‘(𝑘 + 1)))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1)))))
92		nnnn0 12391	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ ℕ₀)
93		reexpcl 13985	. . . . . . . . . . . . 13 ⊢ ((𝐾 ∈ ℝ ∧ 𝑘 ∈ ℕ₀) → (𝐾↑𝑘) ∈ ℝ)
94	45, 92, 93	syl2an 596	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐾↑𝑘) ∈ ℝ)
95	84, 94	remulcld 11145	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘)) ∈ ℝ)
96	13	rpgt0d 12940	. . . . . . . . . . . 12 ⊢ (𝜑 → 0 < 𝐾)
97	96	adantr 480	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 0 < 𝐾)
98		lemul1 11976	. . . . . . . . . . 11 ⊢ ((((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) ∈ ℝ ∧ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘)) ∈ ℝ ∧ (𝐾 ∈ ℝ ∧ 0 < 𝐾)) → (((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘)) ↔ (((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) · 𝐾) ≤ ((((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘)) · 𝐾)))
99	82, 95, 80, 97, 98	syl112anc 1376	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘)) ↔ (((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) · 𝐾) ≤ ((((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘)) · 𝐾)))
100	82	recnd 11143	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) ∈ ℂ)
101	46	adantr 480	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝐾 ∈ ℂ)
102	100, 101	mulcomd 11136	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) · 𝐾) = (𝐾 · ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1)))))
103	84	recnd 11143	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝐴𝐷(𝐹‘𝐴)) / 𝐾) ∈ ℂ)
104	94	recnd 11143	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐾↑𝑘) ∈ ℂ)
105	103, 104, 101	mulassd 11138	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘)) · 𝐾) = (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · ((𝐾↑𝑘) · 𝐾)))
106		expp1 13975	. . . . . . . . . . . . . 14 ⊢ ((𝐾 ∈ ℂ ∧ 𝑘 ∈ ℕ₀) → (𝐾↑(𝑘 + 1)) = ((𝐾↑𝑘) · 𝐾))
107	46, 92, 106	syl2an 596	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐾↑(𝑘 + 1)) = ((𝐾↑𝑘) · 𝐾))
108	107	oveq2d 7365	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1))) = (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · ((𝐾↑𝑘) · 𝐾)))
109	105, 108	eqtr4d 2767	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘)) · 𝐾) = (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1))))
110	102, 109	breq12d 5105	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) · 𝐾) ≤ ((((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘)) · 𝐾) ↔ (𝐾 · ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1)))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1)))))
111	99, 110	bitrd 279	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘)) ↔ (𝐾 · ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1)))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1)))))
112	4, 5, 6, 7, 8	algrp1 16485	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐺‘(𝑘 + 1)) = (𝐹‘(𝐺‘𝑘)))
113	4, 5, 6, 7, 8	algrp1 16485	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑘 + 1) ∈ ℕ) → (𝐺‘((𝑘 + 1) + 1)) = (𝐹‘(𝐺‘(𝑘 + 1))))
114	55, 113	sylan2 593	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐺‘((𝑘 + 1) + 1)) = (𝐹‘(𝐺‘(𝑘 + 1))))
115	112, 114	oveq12d 7367	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝐺‘(𝑘 + 1))𝐷(𝐺‘((𝑘 + 1) + 1))) = ((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘(𝐺‘(𝑘 + 1)))))
116	115	breq1d 5102	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((𝐺‘(𝑘 + 1))𝐷(𝐺‘((𝑘 + 1) + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1))) ↔ ((𝐹‘(𝐺‘𝑘))𝐷(𝐹‘(𝐺‘(𝑘 + 1)))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1)))))
117	91, 111, 116	3imtr4d 294	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘)) → ((𝐺‘(𝑘 + 1))𝐷(𝐺‘((𝑘 + 1) + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1)))))
118	117	expcom 413	. . . . . . 7 ⊢ (𝑘 ∈ ℕ → (𝜑 → (((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘)) → ((𝐺‘(𝑘 + 1))𝐷(𝐺‘((𝑘 + 1) + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1))))))
119	118	a2d 29	. . . . . 6 ⊢ (𝑘 ∈ ℕ → ((𝜑 → ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘))) → (𝜑 → ((𝐺‘(𝑘 + 1))𝐷(𝐺‘((𝑘 + 1) + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑(𝑘 + 1))))))
120	22, 29, 36, 29, 53, 119	nnind 12146	. . . . 5 ⊢ (𝑘 ∈ ℕ → (𝜑 → ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘))))
121	120	impcom 407	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝐺‘𝑘)𝐷(𝐺‘(𝑘 + 1))) ≤ (((𝐴𝐷(𝐹‘𝐴)) / 𝐾) · (𝐾↑𝑘)))
122	3, 9, 14, 13, 15, 121	geomcau 37743	. . 3 ⊢ (𝜑 → 𝐺 ∈ (Cau‘𝐷))
123		bfp.8	. . . 4 ⊢ 𝐽 = (MetOpen‘𝐷)
124	123	cmetcau 25187	. . 3 ⊢ ((𝐷 ∈ (CMet‘𝑋) ∧ 𝐺 ∈ (Cau‘𝐷)) → 𝐺 ∈ dom (⇝_𝑡‘𝐽))
125	1, 122, 124	syl2anc 584	. 2 ⊢ (𝜑 → 𝐺 ∈ dom (⇝_𝑡‘𝐽))
126		metxmet 24220	. . . 4 ⊢ (𝐷 ∈ (Met‘𝑋) → 𝐷 ∈ (∞Met‘𝑋))
127	123	methaus 24406	. . . 4 ⊢ (𝐷 ∈ (∞Met‘𝑋) → 𝐽 ∈ Haus)
128	3, 126, 127	3syl 18	. . 3 ⊢ (𝜑 → 𝐽 ∈ Haus)
129		lmfun 23266	. . 3 ⊢ (𝐽 ∈ Haus → Fun (⇝_𝑡‘𝐽))
130		funfvbrb 6985	. . 3 ⊢ (Fun (⇝_𝑡‘𝐽) → (𝐺 ∈ dom (⇝_𝑡‘𝐽) ↔ 𝐺(⇝_𝑡‘𝐽)((⇝_𝑡‘𝐽)‘𝐺)))
131	128, 129, 130	3syl 18	. 2 ⊢ (𝜑 → (𝐺 ∈ dom (⇝_𝑡‘𝐽) ↔ 𝐺(⇝_𝑡‘𝐽)((⇝_𝑡‘𝐽)‘𝐺)))
132	125, 131	mpbid 232	1 ⊢ (𝜑 → 𝐺(⇝_𝑡‘𝐽)((⇝_𝑡‘𝐽)‘𝐺))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1540 ∈ wcel 2109 ≠ wne 2925 ∀wral 3044 ∅c0 4284 {csn 4577 class class class wbr 5092 × cxp 5617 dom cdm 5619 ∘ ccom 5623 Fun wfun 6476 ⟶wf 6478 ‘cfv 6482 (class class class)co 7349 1^st c1st 7922 ℂcc 11007 ℝcr 11008 0cc0 11009 1c1 11010 + caddc 11012 · cmul 11014 < clt 11149 ≤ cle 11150 / cdiv 11777 ℕcn 12128 ℕ₀cn0 12384 ℝ⁺crp 12893 seqcseq 13908 ↑cexp 13968 ∞Metcxmet 21246 Metcmet 21247 MetOpencmopn 21251 ⇝_𝑡clm 23111 Hauscha 23193 Cauccau 25151 CMetccmet 25152

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5218 ax-sep 5235 ax-nul 5245 ax-pow 5304 ax-pr 5371 ax-un 7671 ax-inf2 9537 ax-cnex 11065 ax-resscn 11066 ax-1cn 11067 ax-icn 11068 ax-addcl 11069 ax-addrcl 11070 ax-mulcl 11071 ax-mulrcl 11072 ax-mulcom 11073 ax-addass 11074 ax-mulass 11075 ax-distr 11076 ax-i2m1 11077 ax-1ne0 11078 ax-1rid 11079 ax-rnegex 11080 ax-rrecex 11081 ax-cnre 11082 ax-pre-lttri 11083 ax-pre-lttrn 11084 ax-pre-ltadd 11085 ax-pre-mulgt0 11086 ax-pre-sup 11087

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rmo 3343 df-reu 3344 df-rab 3395 df-v 3438 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4285 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4859 df-int 4897 df-iun 4943 df-br 5093 df-opab 5155 df-mpt 5174 df-tr 5200 df-id 5514 df-eprel 5519 df-po 5527 df-so 5528 df-fr 5572 df-se 5573 df-we 5574 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-pred 6249 df-ord 6310 df-on 6311 df-lim 6312 df-suc 6313 df-iota 6438 df-fun 6484 df-fn 6485 df-f 6486 df-f1 6487 df-fo 6488 df-f1o 6489 df-fv 6490 df-isom 6491 df-riota 7306 df-ov 7352 df-oprab 7353 df-mpo 7354 df-om 7800 df-1st 7924 df-2nd 7925 df-frecs 8214 df-wrecs 8245 df-recs 8294 df-rdg 8332 df-1o 8388 df-er 8625 df-map 8755 df-pm 8756 df-en 8873 df-dom 8874 df-sdom 8875 df-fin 8876 df-sup 9332 df-inf 9333 df-oi 9402 df-card 9835 df-pnf 11151 df-mnf 11152 df-xr 11153 df-ltxr 11154 df-le 11155 df-sub 11349 df-neg 11350 df-div 11778 df-nn 12129 df-2 12191 df-3 12192 df-n0 12385 df-z 12472 df-uz 12736 df-q 12850 df-rp 12894 df-xneg 13014 df-xadd 13015 df-xmul 13016 df-ico 13254 df-icc 13255 df-fz 13411 df-fzo 13558 df-fl 13696 df-seq 13909 df-exp 13969 df-hash 14238 df-cj 15006 df-re 15007 df-im 15008 df-sqrt 15142 df-abs 15143 df-clim 15395 df-rlim 15396 df-sum 15594 df-rest 17326 df-topgen 17347 df-psmet 21253 df-xmet 21254 df-met 21255 df-bl 21256 df-mopn 21257 df-fbas 21258 df-fg 21259 df-top 22779 df-topon 22796 df-bases 22831 df-ntr 22905 df-nei 22983 df-lm 23114 df-haus 23200 df-fil 23731 df-fm 23823 df-flim 23824 df-flf 23825 df-cfil 25153 df-cau 25154 df-cmet 25155

This theorem is referenced by: bfplem2 37807

W3C validator