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Theorem iscmet3lem2 24809

Description: Lemma for iscmet3 24810. (Contributed by Mario Carneiro, 15-Oct-2015.)

**Hypotheses**
Ref	Expression
iscmet3.1	⊢ 𝑍 = (ℤ_≥‘𝑀)
iscmet3.2	⊢ 𝐽 = (MetOpen‘𝐷)
iscmet3.3	⊢ (𝜑 → 𝑀 ∈ ℤ)
iscmet3.4	⊢ (𝜑 → 𝐷 ∈ (Met‘𝑋))
iscmet3.6	⊢ (𝜑 → 𝐹:𝑍⟶𝑋)
iscmet3.9	⊢ (𝜑 → ∀𝑘 ∈ ℤ ∀𝑢 ∈ (𝑆‘𝑘)∀𝑣 ∈ (𝑆‘𝑘)(𝑢𝐷𝑣) < ((1 / 2)↑𝑘))
iscmet3.10	⊢ (𝜑 → ∀𝑘 ∈ 𝑍 ∀𝑛 ∈ (𝑀...𝑘)(𝐹‘𝑘) ∈ (𝑆‘𝑛))
iscmet3.7	⊢ (𝜑 → 𝐺 ∈ (Fil‘𝑋))
iscmet3.8	⊢ (𝜑 → 𝑆:ℤ⟶𝐺)
iscmet3.5	⊢ (𝜑 → 𝐹 ∈ dom (⇝_𝑡‘𝐽))

**Assertion**
Ref	Expression
iscmet3lem2	⊢ (𝜑 → (𝐽 fLim 𝐺) ≠ ∅)

Distinct variable groups: 𝑘,𝑛,𝑢,𝑣,𝐷 𝑘,𝐺 𝑘,𝐹,𝑛,𝑢,𝑣 𝑘,𝑋,𝑛 𝑘,𝐽,𝑛 𝑆,𝑘,𝑛,𝑢,𝑣 𝑘,𝑍,𝑛 𝑘,𝑀,𝑛 𝜑,𝑘,𝑛 Allowed substitution hints: 𝜑(𝑣,𝑢) 𝐺(𝑣,𝑢,𝑛) 𝐽(𝑣,𝑢) 𝑀(𝑣,𝑢) 𝑋(𝑣,𝑢) 𝑍(𝑣,𝑢)

Proof of Theorem iscmet3lem2 Dummy variables 𝑗 𝑟 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		iscmet3.5	. . 3 ⊢ (𝜑 → 𝐹 ∈ dom (⇝_𝑡‘𝐽))
2		eldmg 5899	. . . 4 ⊢ (𝐹 ∈ dom (⇝_𝑡‘𝐽) → (𝐹 ∈ dom (⇝_𝑡‘𝐽) ↔ ∃𝑥 𝐹(⇝_𝑡‘𝐽)𝑥))
3	2	ibi 267	. . 3 ⊢ (𝐹 ∈ dom (⇝_𝑡‘𝐽) → ∃𝑥 𝐹(⇝_𝑡‘𝐽)𝑥)
4	1, 3	syl 17	. 2 ⊢ (𝜑 → ∃𝑥 𝐹(⇝_𝑡‘𝐽)𝑥)
5		iscmet3.4	. . . . . . 7 ⊢ (𝜑 → 𝐷 ∈ (Met‘𝑋))
6		metxmet 23840	. . . . . . 7 ⊢ (𝐷 ∈ (Met‘𝑋) → 𝐷 ∈ (∞Met‘𝑋))
7	5, 6	syl 17	. . . . . 6 ⊢ (𝜑 → 𝐷 ∈ (∞Met‘𝑋))
8		iscmet3.2	. . . . . . 7 ⊢ 𝐽 = (MetOpen‘𝐷)
9	8	mopntopon 23945	. . . . . 6 ⊢ (𝐷 ∈ (∞Met‘𝑋) → 𝐽 ∈ (TopOn‘𝑋))
10	7, 9	syl 17	. . . . 5 ⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑋))
11		lmcl 22801	. . . . 5 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) → 𝑥 ∈ 𝑋)
12	10, 11	sylan 581	. . . 4 ⊢ ((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) → 𝑥 ∈ 𝑋)
13	7	adantr 482	. . . . . . 7 ⊢ ((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) → 𝐷 ∈ (∞Met‘𝑋))
14	8	mopni2 24002	. . . . . . . 8 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑦 ∈ 𝐽 ∧ 𝑥 ∈ 𝑦) → ∃𝑟 ∈ ℝ⁺ (𝑥(ball‘𝐷)𝑟) ⊆ 𝑦)
15	14	3expia 1122	. . . . . . 7 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑦 ∈ 𝐽) → (𝑥 ∈ 𝑦 → ∃𝑟 ∈ ℝ⁺ (𝑥(ball‘𝐷)𝑟) ⊆ 𝑦))
16	13, 15	sylan 581	. . . . . 6 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑦 ∈ 𝐽) → (𝑥 ∈ 𝑦 → ∃𝑟 ∈ ℝ⁺ (𝑥(ball‘𝐷)𝑟) ⊆ 𝑦))
17		iscmet3.7	. . . . . . . . 9 ⊢ (𝜑 → 𝐺 ∈ (Fil‘𝑋))
18	17	ad3antrrr 729	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑦 ∈ 𝐽) ∧ (𝑟 ∈ ℝ⁺ ∧ (𝑥(ball‘𝐷)𝑟) ⊆ 𝑦)) → 𝐺 ∈ (Fil‘𝑋))
19		iscmet3.3	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑀 ∈ ℤ)
20	19	ad2antrr 725	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) → 𝑀 ∈ ℤ)
21		rphalfcl 13001	. . . . . . . . . . . 12 ⊢ (𝑟 ∈ ℝ⁺ → (𝑟 / 2) ∈ ℝ⁺)
22	21	adantl 483	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) → (𝑟 / 2) ∈ ℝ⁺)
23		iscmet3.1	. . . . . . . . . . . 12 ⊢ 𝑍 = (ℤ_≥‘𝑀)
24	23	iscmet3lem3 24807	. . . . . . . . . . 11 ⊢ ((𝑀 ∈ ℤ ∧ (𝑟 / 2) ∈ ℝ⁺) → ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ_≥‘𝑗)((1 / 2)↑𝑘) < (𝑟 / 2))
25	20, 22, 24	syl2anc 585	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) → ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ_≥‘𝑗)((1 / 2)↑𝑘) < (𝑟 / 2))
26	13	adantr 482	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) → 𝐷 ∈ (∞Met‘𝑋))
27	12	adantr 482	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) → 𝑥 ∈ 𝑋)
28		blcntr 23919	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑥 ∈ 𝑋 ∧ (𝑟 / 2) ∈ ℝ⁺) → 𝑥 ∈ (𝑥(ball‘𝐷)(𝑟 / 2)))
29	26, 27, 22, 28	syl3anc 1372	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) → 𝑥 ∈ (𝑥(ball‘𝐷)(𝑟 / 2)))
30		simplr 768	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) → 𝐹(⇝_𝑡‘𝐽)𝑥)
31	22	rpxrd 13017	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) → (𝑟 / 2) ∈ ℝ^*)
32	8	blopn 24009	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑥 ∈ 𝑋 ∧ (𝑟 / 2) ∈ ℝ^*) → (𝑥(ball‘𝐷)(𝑟 / 2)) ∈ 𝐽)
33	26, 27, 31, 32	syl3anc 1372	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) → (𝑥(ball‘𝐷)(𝑟 / 2)) ∈ 𝐽)
34	23, 29, 20, 30, 33	lmcvg 22766	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) → ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ_≥‘𝑗)(𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2)))
35	23	rexanuz2 15296	. . . . . . . . . . 11 ⊢ (∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ_≥‘𝑗)(((1 / 2)↑𝑘) < (𝑟 / 2) ∧ (𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))) ↔ (∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ_≥‘𝑗)((1 / 2)↑𝑘) < (𝑟 / 2) ∧ ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ_≥‘𝑗)(𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))))
36	23	r19.2uz 15298	. . . . . . . . . . . 12 ⊢ (∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ_≥‘𝑗)(((1 / 2)↑𝑘) < (𝑟 / 2) ∧ (𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))) → ∃𝑘 ∈ 𝑍 (((1 / 2)↑𝑘) < (𝑟 / 2) ∧ (𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))))
37	17	ad3antrrr 729	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ (𝑘 ∈ 𝑍 ∧ (((1 / 2)↑𝑘) < (𝑟 / 2) ∧ (𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))))) → 𝐺 ∈ (Fil‘𝑋))
38		iscmet3.8	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝑆:ℤ⟶𝐺)
39	38	ad3antrrr 729	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ (𝑘 ∈ 𝑍 ∧ (((1 / 2)↑𝑘) < (𝑟 / 2) ∧ (𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))))) → 𝑆:ℤ⟶𝐺)
40		eluzelz 12832	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ (ℤ_≥‘𝑀) → 𝑘 ∈ ℤ)
41	40, 23	eleq2s 2852	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ 𝑍 → 𝑘 ∈ ℤ)
42	41	ad2antrl 727	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ (𝑘 ∈ 𝑍 ∧ (((1 / 2)↑𝑘) < (𝑟 / 2) ∧ (𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))))) → 𝑘 ∈ ℤ)
43		ffvelcdm 7084	. . . . . . . . . . . . . . 15 ⊢ ((𝑆:ℤ⟶𝐺 ∧ 𝑘 ∈ ℤ) → (𝑆‘𝑘) ∈ 𝐺)
44	39, 42, 43	syl2anc 585	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ (𝑘 ∈ 𝑍 ∧ (((1 / 2)↑𝑘) < (𝑟 / 2) ∧ (𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))))) → (𝑆‘𝑘) ∈ 𝐺)
45		rpxr 12983	. . . . . . . . . . . . . . . . 17 ⊢ (𝑟 ∈ ℝ⁺ → 𝑟 ∈ ℝ^*)
46	45	adantl 483	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) → 𝑟 ∈ ℝ^*)
47		blssm 23924	. . . . . . . . . . . . . . . 16 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑥 ∈ 𝑋 ∧ 𝑟 ∈ ℝ^*) → (𝑥(ball‘𝐷)𝑟) ⊆ 𝑋)
48	26, 27, 46, 47	syl3anc 1372	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) → (𝑥(ball‘𝐷)𝑟) ⊆ 𝑋)
49	48	adantr 482	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ (𝑘 ∈ 𝑍 ∧ (((1 / 2)↑𝑘) < (𝑟 / 2) ∧ (𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))))) → (𝑥(ball‘𝐷)𝑟) ⊆ 𝑋)
50	41	adantl 483	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → 𝑘 ∈ ℤ)
51		1rp 12978	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ 1 ∈ ℝ⁺
52		rphalfcl 13001	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (1 ∈ ℝ⁺ → (1 / 2) ∈ ℝ⁺)
53	51, 52	ax-mp 5	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (1 / 2) ∈ ℝ⁺
54		rpexpcl 14046	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (((1 / 2) ∈ ℝ⁺ ∧ 𝑘 ∈ ℤ) → ((1 / 2)↑𝑘) ∈ ℝ⁺)
55	53, 54	mpan 689	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑘 ∈ ℤ → ((1 / 2)↑𝑘) ∈ ℝ⁺)
56	50, 55	syl 17	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → ((1 / 2)↑𝑘) ∈ ℝ⁺)
57	56	rpred 13016	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → ((1 / 2)↑𝑘) ∈ ℝ)
58	22	adantr 482	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → (𝑟 / 2) ∈ ℝ⁺)
59	58	rpred 13016	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → (𝑟 / 2) ∈ ℝ)
60		ltle 11302	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((1 / 2)↑𝑘) ∈ ℝ ∧ (𝑟 / 2) ∈ ℝ) → (((1 / 2)↑𝑘) < (𝑟 / 2) → ((1 / 2)↑𝑘) ≤ (𝑟 / 2)))
61	57, 59, 60	syl2anc 585	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → (((1 / 2)↑𝑘) < (𝑟 / 2) → ((1 / 2)↑𝑘) ≤ (𝑟 / 2)))
62		fveq2 6892	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (𝑛 = 𝑘 → (𝑆‘𝑛) = (𝑆‘𝑘))
63	62	eleq2d 2820	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (𝑛 = 𝑘 → ((𝐹‘𝑘) ∈ (𝑆‘𝑛) ↔ (𝐹‘𝑘) ∈ (𝑆‘𝑘)))
64		iscmet3.10	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (𝜑 → ∀𝑘 ∈ 𝑍 ∀𝑛 ∈ (𝑀...𝑘)(𝐹‘𝑘) ∈ (𝑆‘𝑛))
65	64	r19.21bi 3249	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → ∀𝑛 ∈ (𝑀...𝑘)(𝐹‘𝑘) ∈ (𝑆‘𝑛))
66		eluzfz2 13509	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (𝑘 ∈ (ℤ_≥‘𝑀) → 𝑘 ∈ (𝑀...𝑘))
67	66, 23	eleq2s 2852	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (𝑘 ∈ 𝑍 → 𝑘 ∈ (𝑀...𝑘))
68	67	adantl 483	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝑘 ∈ (𝑀...𝑘))
69	63, 65, 68	rspcdva 3614	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) ∈ (𝑆‘𝑘))
70	69	adantr 482	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑍) ∧ 𝑦 ∈ (𝑆‘𝑘)) → (𝐹‘𝑘) ∈ (𝑆‘𝑘))
71		simpr 486	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑍) ∧ 𝑦 ∈ (𝑆‘𝑘)) → 𝑦 ∈ (𝑆‘𝑘))
72		iscmet3.9	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (𝜑 → ∀𝑘 ∈ ℤ ∀𝑢 ∈ (𝑆‘𝑘)∀𝑣 ∈ (𝑆‘𝑘)(𝑢𝐷𝑣) < ((1 / 2)↑𝑘))
73	72	ad2antrr 725	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑍) ∧ 𝑦 ∈ (𝑆‘𝑘)) → ∀𝑘 ∈ ℤ ∀𝑢 ∈ (𝑆‘𝑘)∀𝑣 ∈ (𝑆‘𝑘)(𝑢𝐷𝑣) < ((1 / 2)↑𝑘))
74	41	ad2antlr 726	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑍) ∧ 𝑦 ∈ (𝑆‘𝑘)) → 𝑘 ∈ ℤ)
75		rsp 3245	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (∀𝑘 ∈ ℤ ∀𝑢 ∈ (𝑆‘𝑘)∀𝑣 ∈ (𝑆‘𝑘)(𝑢𝐷𝑣) < ((1 / 2)↑𝑘) → (𝑘 ∈ ℤ → ∀𝑢 ∈ (𝑆‘𝑘)∀𝑣 ∈ (𝑆‘𝑘)(𝑢𝐷𝑣) < ((1 / 2)↑𝑘)))
76	73, 74, 75	sylc 65	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑍) ∧ 𝑦 ∈ (𝑆‘𝑘)) → ∀𝑢 ∈ (𝑆‘𝑘)∀𝑣 ∈ (𝑆‘𝑘)(𝑢𝐷𝑣) < ((1 / 2)↑𝑘))
77		oveq1 7416	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (𝑢 = (𝐹‘𝑘) → (𝑢𝐷𝑣) = ((𝐹‘𝑘)𝐷𝑣))
78	77	breq1d 5159	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝑢 = (𝐹‘𝑘) → ((𝑢𝐷𝑣) < ((1 / 2)↑𝑘) ↔ ((𝐹‘𝑘)𝐷𝑣) < ((1 / 2)↑𝑘)))
79		oveq2 7417	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (𝑣 = 𝑦 → ((𝐹‘𝑘)𝐷𝑣) = ((𝐹‘𝑘)𝐷𝑦))
80	79	breq1d 5159	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝑣 = 𝑦 → (((𝐹‘𝑘)𝐷𝑣) < ((1 / 2)↑𝑘) ↔ ((𝐹‘𝑘)𝐷𝑦) < ((1 / 2)↑𝑘)))
81	78, 80	rspc2va 3624	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ ((((𝐹‘𝑘) ∈ (𝑆‘𝑘) ∧ 𝑦 ∈ (𝑆‘𝑘)) ∧ ∀𝑢 ∈ (𝑆‘𝑘)∀𝑣 ∈ (𝑆‘𝑘)(𝑢𝐷𝑣) < ((1 / 2)↑𝑘)) → ((𝐹‘𝑘)𝐷𝑦) < ((1 / 2)↑𝑘))
82	70, 71, 76, 81	syl21anc 837	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑍) ∧ 𝑦 ∈ (𝑆‘𝑘)) → ((𝐹‘𝑘)𝐷𝑦) < ((1 / 2)↑𝑘))
83	7	ad2antrr 725	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑍) ∧ 𝑦 ∈ (𝑆‘𝑘)) → 𝐷 ∈ (∞Met‘𝑋))
84	41, 55	syl 17	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (𝑘 ∈ 𝑍 → ((1 / 2)↑𝑘) ∈ ℝ⁺)
85	84	rpxrd 13017	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝑘 ∈ 𝑍 → ((1 / 2)↑𝑘) ∈ ℝ^*)
86	85	ad2antlr 726	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑍) ∧ 𝑦 ∈ (𝑆‘𝑘)) → ((1 / 2)↑𝑘) ∈ ℝ^*)
87		iscmet3.6	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (𝜑 → 𝐹:𝑍⟶𝑋)
88	87	ffvelcdmda 7087	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) ∈ 𝑋)
89	88	adantr 482	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑍) ∧ 𝑦 ∈ (𝑆‘𝑘)) → (𝐹‘𝑘) ∈ 𝑋)
90	17	adantr 482	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝐺 ∈ (Fil‘𝑋))
91	38, 41, 43	syl2an 597	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝑆‘𝑘) ∈ 𝐺)
92		filelss 23356	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝐺 ∈ (Fil‘𝑋) ∧ (𝑆‘𝑘) ∈ 𝐺) → (𝑆‘𝑘) ⊆ 𝑋)
93	90, 91, 92	syl2anc 585	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝑆‘𝑘) ⊆ 𝑋)
94	93	sselda 3983	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑍) ∧ 𝑦 ∈ (𝑆‘𝑘)) → 𝑦 ∈ 𝑋)
95		elbl2 23896	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ ((1 / 2)↑𝑘) ∈ ℝ^*) ∧ ((𝐹‘𝑘) ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) → (𝑦 ∈ ((𝐹‘𝑘)(ball‘𝐷)((1 / 2)↑𝑘)) ↔ ((𝐹‘𝑘)𝐷𝑦) < ((1 / 2)↑𝑘)))
96	83, 86, 89, 94, 95	syl22anc 838	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑍) ∧ 𝑦 ∈ (𝑆‘𝑘)) → (𝑦 ∈ ((𝐹‘𝑘)(ball‘𝐷)((1 / 2)↑𝑘)) ↔ ((𝐹‘𝑘)𝐷𝑦) < ((1 / 2)↑𝑘)))
97	82, 96	mpbird 257	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑍) ∧ 𝑦 ∈ (𝑆‘𝑘)) → 𝑦 ∈ ((𝐹‘𝑘)(ball‘𝐷)((1 / 2)↑𝑘)))
98	97	ex 414	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝑦 ∈ (𝑆‘𝑘) → 𝑦 ∈ ((𝐹‘𝑘)(ball‘𝐷)((1 / 2)↑𝑘))))
99	98	ssrdv 3989	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝑆‘𝑘) ⊆ ((𝐹‘𝑘)(ball‘𝐷)((1 / 2)↑𝑘)))
100	99	ad4ant14 751	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → (𝑆‘𝑘) ⊆ ((𝐹‘𝑘)(ball‘𝐷)((1 / 2)↑𝑘)))
101	26	adantr 482	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → 𝐷 ∈ (∞Met‘𝑋))
102	87	ad2antrr 725	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) → 𝐹:𝑍⟶𝑋)
103	102	ffvelcdmda 7087	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) ∈ 𝑋)
104	56	rpxrd 13017	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → ((1 / 2)↑𝑘) ∈ ℝ^*)
105	31	adantr 482	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → (𝑟 / 2) ∈ ℝ^*)
106		ssbl 23929	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ (𝐹‘𝑘) ∈ 𝑋) ∧ (((1 / 2)↑𝑘) ∈ ℝ^* ∧ (𝑟 / 2) ∈ ℝ^*) ∧ ((1 / 2)↑𝑘) ≤ (𝑟 / 2)) → ((𝐹‘𝑘)(ball‘𝐷)((1 / 2)↑𝑘)) ⊆ ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2)))
107	106	3expia 1122	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ (𝐹‘𝑘) ∈ 𝑋) ∧ (((1 / 2)↑𝑘) ∈ ℝ^* ∧ (𝑟 / 2) ∈ ℝ^*)) → (((1 / 2)↑𝑘) ≤ (𝑟 / 2) → ((𝐹‘𝑘)(ball‘𝐷)((1 / 2)↑𝑘)) ⊆ ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2))))
108	101, 103, 104, 105, 107	syl22anc 838	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → (((1 / 2)↑𝑘) ≤ (𝑟 / 2) → ((𝐹‘𝑘)(ball‘𝐷)((1 / 2)↑𝑘)) ⊆ ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2))))
109		sstr 3991	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝑆‘𝑘) ⊆ ((𝐹‘𝑘)(ball‘𝐷)((1 / 2)↑𝑘)) ∧ ((𝐹‘𝑘)(ball‘𝐷)((1 / 2)↑𝑘)) ⊆ ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2))) → (𝑆‘𝑘) ⊆ ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2)))
110	100, 108, 109	syl6an 683	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → (((1 / 2)↑𝑘) ≤ (𝑟 / 2) → (𝑆‘𝑘) ⊆ ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2))))
111	61, 110	syld 47	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → (((1 / 2)↑𝑘) < (𝑟 / 2) → (𝑆‘𝑘) ⊆ ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2))))
112	111	adantrd 493	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → ((((1 / 2)↑𝑘) < (𝑟 / 2) ∧ (𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))) → (𝑆‘𝑘) ⊆ ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2))))
113	112	impr 456	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ (𝑘 ∈ 𝑍 ∧ (((1 / 2)↑𝑘) < (𝑟 / 2) ∧ (𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))))) → (𝑆‘𝑘) ⊆ ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2)))
114	27	adantr 482	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → 𝑥 ∈ 𝑋)
115		blcom 23900	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ (𝑟 / 2) ∈ ℝ^*) ∧ (𝑥 ∈ 𝑋 ∧ (𝐹‘𝑘) ∈ 𝑋)) → ((𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2)) ↔ 𝑥 ∈ ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2))))
116	101, 105, 114, 103, 115	syl22anc 838	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → ((𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2)) ↔ 𝑥 ∈ ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2))))
117		rpre 12982	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑟 ∈ ℝ⁺ → 𝑟 ∈ ℝ)
118	117	ad2antlr 726	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → 𝑟 ∈ ℝ)
119		blhalf 23911	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ (𝐹‘𝑘) ∈ 𝑋) ∧ (𝑟 ∈ ℝ ∧ 𝑥 ∈ ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2)))) → ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2)) ⊆ (𝑥(ball‘𝐷)𝑟))
120	119	expr 458	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ (𝐹‘𝑘) ∈ 𝑋) ∧ 𝑟 ∈ ℝ) → (𝑥 ∈ ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2)) → ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2)) ⊆ (𝑥(ball‘𝐷)𝑟)))
121	101, 103, 118, 120	syl21anc 837	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → (𝑥 ∈ ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2)) → ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2)) ⊆ (𝑥(ball‘𝐷)𝑟)))
122	116, 121	sylbid 239	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → ((𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2)) → ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2)) ⊆ (𝑥(ball‘𝐷)𝑟)))
123	122	adantld 492	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ 𝑘 ∈ 𝑍) → ((((1 / 2)↑𝑘) < (𝑟 / 2) ∧ (𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))) → ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2)) ⊆ (𝑥(ball‘𝐷)𝑟)))
124	123	impr 456	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ (𝑘 ∈ 𝑍 ∧ (((1 / 2)↑𝑘) < (𝑟 / 2) ∧ (𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))))) → ((𝐹‘𝑘)(ball‘𝐷)(𝑟 / 2)) ⊆ (𝑥(ball‘𝐷)𝑟))
125	113, 124	sstrd 3993	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ (𝑘 ∈ 𝑍 ∧ (((1 / 2)↑𝑘) < (𝑟 / 2) ∧ (𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))))) → (𝑆‘𝑘) ⊆ (𝑥(ball‘𝐷)𝑟))
126		filss 23357	. . . . . . . . . . . . . 14 ⊢ ((𝐺 ∈ (Fil‘𝑋) ∧ ((𝑆‘𝑘) ∈ 𝐺 ∧ (𝑥(ball‘𝐷)𝑟) ⊆ 𝑋 ∧ (𝑆‘𝑘) ⊆ (𝑥(ball‘𝐷)𝑟))) → (𝑥(ball‘𝐷)𝑟) ∈ 𝐺)
127	37, 44, 49, 125, 126	syl13anc 1373	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) ∧ (𝑘 ∈ 𝑍 ∧ (((1 / 2)↑𝑘) < (𝑟 / 2) ∧ (𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))))) → (𝑥(ball‘𝐷)𝑟) ∈ 𝐺)
128	127	rexlimdvaa 3157	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) → (∃𝑘 ∈ 𝑍 (((1 / 2)↑𝑘) < (𝑟 / 2) ∧ (𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))) → (𝑥(ball‘𝐷)𝑟) ∈ 𝐺))
129	36, 128	syl5 34	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) → (∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ_≥‘𝑗)(((1 / 2)↑𝑘) < (𝑟 / 2) ∧ (𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))) → (𝑥(ball‘𝐷)𝑟) ∈ 𝐺))
130	35, 129	biimtrrid 242	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) → ((∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ_≥‘𝑗)((1 / 2)↑𝑘) < (𝑟 / 2) ∧ ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ_≥‘𝑗)(𝐹‘𝑘) ∈ (𝑥(ball‘𝐷)(𝑟 / 2))) → (𝑥(ball‘𝐷)𝑟) ∈ 𝐺))
131	25, 34, 130	mp2and 698	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑟 ∈ ℝ⁺) → (𝑥(ball‘𝐷)𝑟) ∈ 𝐺)
132	131	ad2ant2r 746	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑦 ∈ 𝐽) ∧ (𝑟 ∈ ℝ⁺ ∧ (𝑥(ball‘𝐷)𝑟) ⊆ 𝑦)) → (𝑥(ball‘𝐷)𝑟) ∈ 𝐺)
133	10	adantr 482	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) → 𝐽 ∈ (TopOn‘𝑋))
134		toponss 22429	. . . . . . . . . 10 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑦 ∈ 𝐽) → 𝑦 ⊆ 𝑋)
135	133, 134	sylan 581	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑦 ∈ 𝐽) → 𝑦 ⊆ 𝑋)
136	135	adantr 482	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑦 ∈ 𝐽) ∧ (𝑟 ∈ ℝ⁺ ∧ (𝑥(ball‘𝐷)𝑟) ⊆ 𝑦)) → 𝑦 ⊆ 𝑋)
137		simprr 772	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑦 ∈ 𝐽) ∧ (𝑟 ∈ ℝ⁺ ∧ (𝑥(ball‘𝐷)𝑟) ⊆ 𝑦)) → (𝑥(ball‘𝐷)𝑟) ⊆ 𝑦)
138		filss 23357	. . . . . . . 8 ⊢ ((𝐺 ∈ (Fil‘𝑋) ∧ ((𝑥(ball‘𝐷)𝑟) ∈ 𝐺 ∧ 𝑦 ⊆ 𝑋 ∧ (𝑥(ball‘𝐷)𝑟) ⊆ 𝑦)) → 𝑦 ∈ 𝐺)
139	18, 132, 136, 137, 138	syl13anc 1373	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑦 ∈ 𝐽) ∧ (𝑟 ∈ ℝ⁺ ∧ (𝑥(ball‘𝐷)𝑟) ⊆ 𝑦)) → 𝑦 ∈ 𝐺)
140	139	rexlimdvaa 3157	. . . . . 6 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑦 ∈ 𝐽) → (∃𝑟 ∈ ℝ⁺ (𝑥(ball‘𝐷)𝑟) ⊆ 𝑦 → 𝑦 ∈ 𝐺))
141	16, 140	syld 47	. . . . 5 ⊢ (((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) ∧ 𝑦 ∈ 𝐽) → (𝑥 ∈ 𝑦 → 𝑦 ∈ 𝐺))
142	141	ralrimiva 3147	. . . 4 ⊢ ((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) → ∀𝑦 ∈ 𝐽 (𝑥 ∈ 𝑦 → 𝑦 ∈ 𝐺))
143		flimopn 23479	. . . . . 6 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐺 ∈ (Fil‘𝑋)) → (𝑥 ∈ (𝐽 fLim 𝐺) ↔ (𝑥 ∈ 𝑋 ∧ ∀𝑦 ∈ 𝐽 (𝑥 ∈ 𝑦 → 𝑦 ∈ 𝐺))))
144	10, 17, 143	syl2anc 585	. . . . 5 ⊢ (𝜑 → (𝑥 ∈ (𝐽 fLim 𝐺) ↔ (𝑥 ∈ 𝑋 ∧ ∀𝑦 ∈ 𝐽 (𝑥 ∈ 𝑦 → 𝑦 ∈ 𝐺))))
145	144	adantr 482	. . . 4 ⊢ ((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) → (𝑥 ∈ (𝐽 fLim 𝐺) ↔ (𝑥 ∈ 𝑋 ∧ ∀𝑦 ∈ 𝐽 (𝑥 ∈ 𝑦 → 𝑦 ∈ 𝐺))))
146	12, 142, 145	mpbir2and 712	. . 3 ⊢ ((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) → 𝑥 ∈ (𝐽 fLim 𝐺))
147	146	ne0d 4336	. 2 ⊢ ((𝜑 ∧ 𝐹(⇝_𝑡‘𝐽)𝑥) → (𝐽 fLim 𝐺) ≠ ∅)
148	4, 147	exlimddv 1939	1 ⊢ (𝜑 → (𝐽 fLim 𝐺) ≠ ∅)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 = wceq 1542 ∃wex 1782 ∈ wcel 2107 ≠ wne 2941 ∀wral 3062 ∃wrex 3071 ⊆ wss 3949 ∅c0 4323 class class class wbr 5149 dom cdm 5677 ⟶wf 6540 ‘cfv 6544 (class class class)co 7409 ℝcr 11109 1c1 11111 ℝ^*cxr 11247 < clt 11248 ≤ cle 11249 / cdiv 11871 2c2 12267 ℤcz 12558 ℤ_≥cuz 12822 ℝ⁺crp 12974 ...cfz 13484 ↑cexp 14027 ∞Metcxmet 20929 Metcmet 20930 ballcbl 20931 MetOpencmopn 20934 TopOnctopon 22412 ⇝_𝑡clm 22730 Filcfil 23349 fLim cflim 23438

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 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 ax-pre-sup 11188

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 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-iun 5000 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-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-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7856 df-1st 7975 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-er 8703 df-map 8822 df-pm 8823 df-en 8940 df-dom 8941 df-sdom 8942 df-sup 9437 df-inf 9438 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-div 11872 df-nn 12213 df-2 12275 df-3 12276 df-n0 12473 df-z 12559 df-uz 12823 df-q 12933 df-rp 12975 df-xneg 13092 df-xadd 13093 df-xmul 13094 df-fz 13485 df-fl 13757 df-seq 13967 df-exp 14028 df-cj 15046 df-re 15047 df-im 15048 df-sqrt 15182 df-abs 15183 df-clim 15432 df-rlim 15433 df-topgen 17389 df-psmet 20936 df-xmet 20937 df-met 20938 df-bl 20939 df-mopn 20940 df-fbas 20941 df-top 22396 df-topon 22413 df-bases 22449 df-ntr 22524 df-nei 22602 df-lm 22733 df-fil 23350 df-flim 23443

This theorem is referenced by: iscmet3 24810

W3C validator