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Theorem cncfmet 24753

Description: Relate complex function continuity to metric space continuity. (Contributed by Paul Chapman, 26-Nov-2007.) (Revised by Mario Carneiro, 7-Sep-2015.)

**Hypotheses**
Ref	Expression
cncfmet.1	⊢ 𝐶 = ((abs ∘ − ) ↾ (𝐴 × 𝐴))
cncfmet.2	⊢ 𝐷 = ((abs ∘ − ) ↾ (𝐵 × 𝐵))
cncfmet.3	⊢ 𝐽 = (MetOpen‘𝐶)
cncfmet.4	⊢ 𝐾 = (MetOpen‘𝐷)

**Assertion**
Ref	Expression
cncfmet	⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → (𝐴–cn→𝐵) = (𝐽 Cn 𝐾))

Proof of Theorem cncfmet Dummy variables 𝑤 𝑓 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		simplll 772	. . . . . . . . . . . 12 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → 𝐴 ⊆ ℂ)
2		simprl 768	. . . . . . . . . . . 12 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → 𝑥 ∈ 𝐴)
3		simprr 770	. . . . . . . . . . . 12 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → 𝑤 ∈ 𝐴)
4		cncfmet.1	. . . . . . . . . . . . . . . 16 ⊢ 𝐶 = ((abs ∘ − ) ↾ (𝐴 × 𝐴))
5	4	oveqi 7415	. . . . . . . . . . . . . . 15 ⊢ (𝑥𝐶𝑤) = (𝑥((abs ∘ − ) ↾ (𝐴 × 𝐴))𝑤)
6		ovres 7567	. . . . . . . . . . . . . . 15 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴) → (𝑥((abs ∘ − ) ↾ (𝐴 × 𝐴))𝑤) = (𝑥(abs ∘ − )𝑤))
7	5, 6	eqtrid 2776	. . . . . . . . . . . . . 14 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴) → (𝑥𝐶𝑤) = (𝑥(abs ∘ − )𝑤))
8	7	ad2ant2l 743	. . . . . . . . . . . . 13 ⊢ (((𝐴 ⊆ ℂ ∧ 𝑥 ∈ 𝐴) ∧ (𝐴 ⊆ ℂ ∧ 𝑤 ∈ 𝐴)) → (𝑥𝐶𝑤) = (𝑥(abs ∘ − )𝑤))
9		ssel2 3970	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ⊆ ℂ ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ ℂ)
10		ssel2 3970	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ⊆ ℂ ∧ 𝑤 ∈ 𝐴) → 𝑤 ∈ ℂ)
11		eqid 2724	. . . . . . . . . . . . . . 15 ⊢ (abs ∘ − ) = (abs ∘ − )
12	11	cnmetdval 24611	. . . . . . . . . . . . . 14 ⊢ ((𝑥 ∈ ℂ ∧ 𝑤 ∈ ℂ) → (𝑥(abs ∘ − )𝑤) = (abs‘(𝑥 − 𝑤)))
13	9, 10, 12	syl2an 595	. . . . . . . . . . . . 13 ⊢ (((𝐴 ⊆ ℂ ∧ 𝑥 ∈ 𝐴) ∧ (𝐴 ⊆ ℂ ∧ 𝑤 ∈ 𝐴)) → (𝑥(abs ∘ − )𝑤) = (abs‘(𝑥 − 𝑤)))
14	8, 13	eqtrd 2764	. . . . . . . . . . . 12 ⊢ (((𝐴 ⊆ ℂ ∧ 𝑥 ∈ 𝐴) ∧ (𝐴 ⊆ ℂ ∧ 𝑤 ∈ 𝐴)) → (𝑥𝐶𝑤) = (abs‘(𝑥 − 𝑤)))
15	1, 2, 1, 3, 14	syl22anc 836	. . . . . . . . . . 11 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → (𝑥𝐶𝑤) = (abs‘(𝑥 − 𝑤)))
16	15	breq1d 5149	. . . . . . . . . 10 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → ((𝑥𝐶𝑤) < 𝑧 ↔ (abs‘(𝑥 − 𝑤)) < 𝑧))
17		ffvelcdm 7074	. . . . . . . . . . . . . 14 ⊢ ((𝑓:𝐴⟶𝐵 ∧ 𝑥 ∈ 𝐴) → (𝑓‘𝑥) ∈ 𝐵)
18	17	ad2ant2lr 745	. . . . . . . . . . . . 13 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → (𝑓‘𝑥) ∈ 𝐵)
19		ffvelcdm 7074	. . . . . . . . . . . . . 14 ⊢ ((𝑓:𝐴⟶𝐵 ∧ 𝑤 ∈ 𝐴) → (𝑓‘𝑤) ∈ 𝐵)
20	19	ad2ant2l 743	. . . . . . . . . . . . 13 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → (𝑓‘𝑤) ∈ 𝐵)
21		cncfmet.2	. . . . . . . . . . . . . . 15 ⊢ 𝐷 = ((abs ∘ − ) ↾ (𝐵 × 𝐵))
22	21	oveqi 7415	. . . . . . . . . . . . . 14 ⊢ ((𝑓‘𝑥)𝐷(𝑓‘𝑤)) = ((𝑓‘𝑥)((abs ∘ − ) ↾ (𝐵 × 𝐵))(𝑓‘𝑤))
23		ovres 7567	. . . . . . . . . . . . . 14 ⊢ (((𝑓‘𝑥) ∈ 𝐵 ∧ (𝑓‘𝑤) ∈ 𝐵) → ((𝑓‘𝑥)((abs ∘ − ) ↾ (𝐵 × 𝐵))(𝑓‘𝑤)) = ((𝑓‘𝑥)(abs ∘ − )(𝑓‘𝑤)))
24	22, 23	eqtrid 2776	. . . . . . . . . . . . 13 ⊢ (((𝑓‘𝑥) ∈ 𝐵 ∧ (𝑓‘𝑤) ∈ 𝐵) → ((𝑓‘𝑥)𝐷(𝑓‘𝑤)) = ((𝑓‘𝑥)(abs ∘ − )(𝑓‘𝑤)))
25	18, 20, 24	syl2anc 583	. . . . . . . . . . . 12 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → ((𝑓‘𝑥)𝐷(𝑓‘𝑤)) = ((𝑓‘𝑥)(abs ∘ − )(𝑓‘𝑤)))
26		simpllr 773	. . . . . . . . . . . . . 14 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → 𝐵 ⊆ ℂ)
27	26, 18	sseldd 3976	. . . . . . . . . . . . 13 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → (𝑓‘𝑥) ∈ ℂ)
28	26, 20	sseldd 3976	. . . . . . . . . . . . 13 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → (𝑓‘𝑤) ∈ ℂ)
29	11	cnmetdval 24611	. . . . . . . . . . . . 13 ⊢ (((𝑓‘𝑥) ∈ ℂ ∧ (𝑓‘𝑤) ∈ ℂ) → ((𝑓‘𝑥)(abs ∘ − )(𝑓‘𝑤)) = (abs‘((𝑓‘𝑥) − (𝑓‘𝑤))))
30	27, 28, 29	syl2anc 583	. . . . . . . . . . . 12 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → ((𝑓‘𝑥)(abs ∘ − )(𝑓‘𝑤)) = (abs‘((𝑓‘𝑥) − (𝑓‘𝑤))))
31	25, 30	eqtrd 2764	. . . . . . . . . . 11 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → ((𝑓‘𝑥)𝐷(𝑓‘𝑤)) = (abs‘((𝑓‘𝑥) − (𝑓‘𝑤))))
32	31	breq1d 5149	. . . . . . . . . 10 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → (((𝑓‘𝑥)𝐷(𝑓‘𝑤)) < 𝑦 ↔ (abs‘((𝑓‘𝑥) − (𝑓‘𝑤))) < 𝑦))
33	16, 32	imbi12d 344	. . . . . . . . 9 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → (((𝑥𝐶𝑤) < 𝑧 → ((𝑓‘𝑥)𝐷(𝑓‘𝑤)) < 𝑦) ↔ ((abs‘(𝑥 − 𝑤)) < 𝑧 → (abs‘((𝑓‘𝑥) − (𝑓‘𝑤))) < 𝑦)))
34	33	anassrs 467	. . . . . . . 8 ⊢ (((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ 𝑥 ∈ 𝐴) ∧ 𝑤 ∈ 𝐴) → (((𝑥𝐶𝑤) < 𝑧 → ((𝑓‘𝑥)𝐷(𝑓‘𝑤)) < 𝑦) ↔ ((abs‘(𝑥 − 𝑤)) < 𝑧 → (abs‘((𝑓‘𝑥) − (𝑓‘𝑤))) < 𝑦)))
35	34	ralbidva 3167	. . . . . . 7 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ 𝑥 ∈ 𝐴) → (∀𝑤 ∈ 𝐴 ((𝑥𝐶𝑤) < 𝑧 → ((𝑓‘𝑥)𝐷(𝑓‘𝑤)) < 𝑦) ↔ ∀𝑤 ∈ 𝐴 ((abs‘(𝑥 − 𝑤)) < 𝑧 → (abs‘((𝑓‘𝑥) − (𝑓‘𝑤))) < 𝑦)))
36	35	rexbidv 3170	. . . . . 6 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ 𝑥 ∈ 𝐴) → (∃𝑧 ∈ ℝ⁺ ∀𝑤 ∈ 𝐴 ((𝑥𝐶𝑤) < 𝑧 → ((𝑓‘𝑥)𝐷(𝑓‘𝑤)) < 𝑦) ↔ ∃𝑧 ∈ ℝ⁺ ∀𝑤 ∈ 𝐴 ((abs‘(𝑥 − 𝑤)) < 𝑧 → (abs‘((𝑓‘𝑥) − (𝑓‘𝑤))) < 𝑦)))
37	36	ralbidv 3169	. . . . 5 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ 𝑥 ∈ 𝐴) → (∀𝑦 ∈ ℝ⁺ ∃𝑧 ∈ ℝ⁺ ∀𝑤 ∈ 𝐴 ((𝑥𝐶𝑤) < 𝑧 → ((𝑓‘𝑥)𝐷(𝑓‘𝑤)) < 𝑦) ↔ ∀𝑦 ∈ ℝ⁺ ∃𝑧 ∈ ℝ⁺ ∀𝑤 ∈ 𝐴 ((abs‘(𝑥 − 𝑤)) < 𝑧 → (abs‘((𝑓‘𝑥) − (𝑓‘𝑤))) < 𝑦)))
38	37	ralbidva 3167	. . . 4 ⊢ (((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) → (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ ℝ⁺ ∃𝑧 ∈ ℝ⁺ ∀𝑤 ∈ 𝐴 ((𝑥𝐶𝑤) < 𝑧 → ((𝑓‘𝑥)𝐷(𝑓‘𝑤)) < 𝑦) ↔ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ ℝ⁺ ∃𝑧 ∈ ℝ⁺ ∀𝑤 ∈ 𝐴 ((abs‘(𝑥 − 𝑤)) < 𝑧 → (abs‘((𝑓‘𝑥) − (𝑓‘𝑤))) < 𝑦)))
39	38	pm5.32da 578	. . 3 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → ((𝑓:𝐴⟶𝐵 ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ ℝ⁺ ∃𝑧 ∈ ℝ⁺ ∀𝑤 ∈ 𝐴 ((𝑥𝐶𝑤) < 𝑧 → ((𝑓‘𝑥)𝐷(𝑓‘𝑤)) < 𝑦)) ↔ (𝑓:𝐴⟶𝐵 ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ ℝ⁺ ∃𝑧 ∈ ℝ⁺ ∀𝑤 ∈ 𝐴 ((abs‘(𝑥 − 𝑤)) < 𝑧 → (abs‘((𝑓‘𝑥) − (𝑓‘𝑤))) < 𝑦))))
40		cnxmet 24613	. . . . . 6 ⊢ (abs ∘ − ) ∈ (∞Met‘ℂ)
41		xmetres2 24191	. . . . . 6 ⊢ (((abs ∘ − ) ∈ (∞Met‘ℂ) ∧ 𝐴 ⊆ ℂ) → ((abs ∘ − ) ↾ (𝐴 × 𝐴)) ∈ (∞Met‘𝐴))
42	40, 41	mpan 687	. . . . 5 ⊢ (𝐴 ⊆ ℂ → ((abs ∘ − ) ↾ (𝐴 × 𝐴)) ∈ (∞Met‘𝐴))
43	4, 42	eqeltrid 2829	. . . 4 ⊢ (𝐴 ⊆ ℂ → 𝐶 ∈ (∞Met‘𝐴))
44		xmetres2 24191	. . . . . 6 ⊢ (((abs ∘ − ) ∈ (∞Met‘ℂ) ∧ 𝐵 ⊆ ℂ) → ((abs ∘ − ) ↾ (𝐵 × 𝐵)) ∈ (∞Met‘𝐵))
45	40, 44	mpan 687	. . . . 5 ⊢ (𝐵 ⊆ ℂ → ((abs ∘ − ) ↾ (𝐵 × 𝐵)) ∈ (∞Met‘𝐵))
46	21, 45	eqeltrid 2829	. . . 4 ⊢ (𝐵 ⊆ ℂ → 𝐷 ∈ (∞Met‘𝐵))
47		cncfmet.3	. . . . 5 ⊢ 𝐽 = (MetOpen‘𝐶)
48		cncfmet.4	. . . . 5 ⊢ 𝐾 = (MetOpen‘𝐷)
49	47, 48	metcn 24376	. . . 4 ⊢ ((𝐶 ∈ (∞Met‘𝐴) ∧ 𝐷 ∈ (∞Met‘𝐵)) → (𝑓 ∈ (𝐽 Cn 𝐾) ↔ (𝑓:𝐴⟶𝐵 ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ ℝ⁺ ∃𝑧 ∈ ℝ⁺ ∀𝑤 ∈ 𝐴 ((𝑥𝐶𝑤) < 𝑧 → ((𝑓‘𝑥)𝐷(𝑓‘𝑤)) < 𝑦))))
50	43, 46, 49	syl2an 595	. . 3 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → (𝑓 ∈ (𝐽 Cn 𝐾) ↔ (𝑓:𝐴⟶𝐵 ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ ℝ⁺ ∃𝑧 ∈ ℝ⁺ ∀𝑤 ∈ 𝐴 ((𝑥𝐶𝑤) < 𝑧 → ((𝑓‘𝑥)𝐷(𝑓‘𝑤)) < 𝑦))))
51		elcncf 24733	. . 3 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → (𝑓 ∈ (𝐴–cn→𝐵) ↔ (𝑓:𝐴⟶𝐵 ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ ℝ⁺ ∃𝑧 ∈ ℝ⁺ ∀𝑤 ∈ 𝐴 ((abs‘(𝑥 − 𝑤)) < 𝑧 → (abs‘((𝑓‘𝑥) − (𝑓‘𝑤))) < 𝑦))))
52	39, 50, 51	3bitr4rd 312	. 2 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → (𝑓 ∈ (𝐴–cn→𝐵) ↔ 𝑓 ∈ (𝐽 Cn 𝐾)))
53	52	eqrdv 2722	1 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → (𝐴–cn→𝐵) = (𝐽 Cn 𝐾))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1533 ∈ wcel 2098 ∀wral 3053 ∃wrex 3062 ⊆ wss 3941 class class class wbr 5139 × cxp 5665 ↾ cres 5669 ∘ ccom 5671 ⟶wf 6530 ‘cfv 6534 (class class class)co 7402 ℂcc 11105 < clt 11246 − cmin 11442 ℝ⁺crp 12972 abscabs 15179 ∞Metcxmet 21215 MetOpencmopn 21220 Cn ccn 23052 –cn→ccncf 24720

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2695 ax-sep 5290 ax-nul 5297 ax-pow 5354 ax-pr 5418 ax-un 7719 ax-cnex 11163 ax-resscn 11164 ax-1cn 11165 ax-icn 11166 ax-addcl 11167 ax-addrcl 11168 ax-mulcl 11169 ax-mulrcl 11170 ax-mulcom 11171 ax-addass 11172 ax-mulass 11173 ax-distr 11174 ax-i2m1 11175 ax-1ne0 11176 ax-1rid 11177 ax-rnegex 11178 ax-rrecex 11179 ax-cnre 11180 ax-pre-lttri 11181 ax-pre-lttrn 11182 ax-pre-ltadd 11183 ax-pre-mulgt0 11184 ax-pre-sup 11185

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2526 df-eu 2555 df-clab 2702 df-cleq 2716 df-clel 2802 df-nfc 2877 df-ne 2933 df-nel 3039 df-ral 3054 df-rex 3063 df-rmo 3368 df-reu 3369 df-rab 3425 df-v 3468 df-sbc 3771 df-csb 3887 df-dif 3944 df-un 3946 df-in 3948 df-ss 3958 df-pss 3960 df-nul 4316 df-if 4522 df-pw 4597 df-sn 4622 df-pr 4624 df-op 4628 df-uni 4901 df-iun 4990 df-br 5140 df-opab 5202 df-mpt 5223 df-tr 5257 df-id 5565 df-eprel 5571 df-po 5579 df-so 5580 df-fr 5622 df-we 5624 df-xp 5673 df-rel 5674 df-cnv 5675 df-co 5676 df-dm 5677 df-rn 5678 df-res 5679 df-ima 5680 df-pred 6291 df-ord 6358 df-on 6359 df-lim 6360 df-suc 6361 df-iota 6486 df-fun 6536 df-fn 6537 df-f 6538 df-f1 6539 df-fo 6540 df-f1o 6541 df-fv 6542 df-riota 7358 df-ov 7405 df-oprab 7406 df-mpo 7407 df-om 7850 df-1st 7969 df-2nd 7970 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-er 8700 df-map 8819 df-en 8937 df-dom 8938 df-sdom 8939 df-sup 9434 df-inf 9435 df-pnf 11248 df-mnf 11249 df-xr 11250 df-ltxr 11251 df-le 11252 df-sub 11444 df-neg 11445 df-div 11870 df-nn 12211 df-2 12273 df-3 12274 df-n0 12471 df-z 12557 df-uz 12821 df-q 12931 df-rp 12973 df-xneg 13090 df-xadd 13091 df-xmul 13092 df-seq 13965 df-exp 14026 df-cj 15044 df-re 15045 df-im 15046 df-sqrt 15180 df-abs 15181 df-topgen 17390 df-psmet 21222 df-xmet 21223 df-met 21224 df-bl 21225 df-mopn 21226 df-top 22720 df-topon 22737 df-bases 22773 df-cn 23055 df-cnp 23056 df-cncf 24722

This theorem is referenced by: cncfcn 24754 evthicc 25312 cncfres 37127

W3C validator