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Theorem cncfmet 24823

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 774	. . . . . . . . . . . 12 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → 𝐴 ⊆ ℂ)
2		simprl 770	. . . . . . . . . . . 12 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → 𝑥 ∈ 𝐴)
3		simprr 772	. . . . . . . . . . . 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 7428	. . . . . . . . . . . . . . 15 ⊢ (𝑥𝐶𝑤) = (𝑥((abs ∘ − ) ↾ (𝐴 × 𝐴))𝑤)
6		ovres 7582	. . . . . . . . . . . . . . 15 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴) → (𝑥((abs ∘ − ) ↾ (𝐴 × 𝐴))𝑤) = (𝑥(abs ∘ − )𝑤))
7	5, 6	eqtrid 2780	. . . . . . . . . . . . . 14 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴) → (𝑥𝐶𝑤) = (𝑥(abs ∘ − )𝑤))
8	7	ad2ant2l 745	. . . . . . . . . . . . 13 ⊢ (((𝐴 ⊆ ℂ ∧ 𝑥 ∈ 𝐴) ∧ (𝐴 ⊆ ℂ ∧ 𝑤 ∈ 𝐴)) → (𝑥𝐶𝑤) = (𝑥(abs ∘ − )𝑤))
9		ssel2 3974	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ⊆ ℂ ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ ℂ)
10		ssel2 3974	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ⊆ ℂ ∧ 𝑤 ∈ 𝐴) → 𝑤 ∈ ℂ)
11		eqid 2728	. . . . . . . . . . . . . . 15 ⊢ (abs ∘ − ) = (abs ∘ − )
12	11	cnmetdval 24681	. . . . . . . . . . . . . 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 2768	. . . . . . . . . . . 12 ⊢ (((𝐴 ⊆ ℂ ∧ 𝑥 ∈ 𝐴) ∧ (𝐴 ⊆ ℂ ∧ 𝑤 ∈ 𝐴)) → (𝑥𝐶𝑤) = (abs‘(𝑥 − 𝑤)))
15	1, 2, 1, 3, 14	syl22anc 838	. . . . . . . . . . 11 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → (𝑥𝐶𝑤) = (abs‘(𝑥 − 𝑤)))
16	15	breq1d 5153	. . . . . . . . . 10 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → ((𝑥𝐶𝑤) < 𝑧 ↔ (abs‘(𝑥 − 𝑤)) < 𝑧))
17		ffvelcdm 7086	. . . . . . . . . . . . . 14 ⊢ ((𝑓:𝐴⟶𝐵 ∧ 𝑥 ∈ 𝐴) → (𝑓‘𝑥) ∈ 𝐵)
18	17	ad2ant2lr 747	. . . . . . . . . . . . 13 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → (𝑓‘𝑥) ∈ 𝐵)
19		ffvelcdm 7086	. . . . . . . . . . . . . 14 ⊢ ((𝑓:𝐴⟶𝐵 ∧ 𝑤 ∈ 𝐴) → (𝑓‘𝑤) ∈ 𝐵)
20	19	ad2ant2l 745	. . . . . . . . . . . . 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 7428	. . . . . . . . . . . . . 14 ⊢ ((𝑓‘𝑥)𝐷(𝑓‘𝑤)) = ((𝑓‘𝑥)((abs ∘ − ) ↾ (𝐵 × 𝐵))(𝑓‘𝑤))
23		ovres 7582	. . . . . . . . . . . . . 14 ⊢ (((𝑓‘𝑥) ∈ 𝐵 ∧ (𝑓‘𝑤) ∈ 𝐵) → ((𝑓‘𝑥)((abs ∘ − ) ↾ (𝐵 × 𝐵))(𝑓‘𝑤)) = ((𝑓‘𝑥)(abs ∘ − )(𝑓‘𝑤)))
24	22, 23	eqtrid 2780	. . . . . . . . . . . . 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 775	. . . . . . . . . . . . . 14 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → 𝐵 ⊆ ℂ)
27	26, 18	sseldd 3980	. . . . . . . . . . . . 13 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → (𝑓‘𝑥) ∈ ℂ)
28	26, 20	sseldd 3980	. . . . . . . . . . . . 13 ⊢ ((((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) ∧ 𝑓:𝐴⟶𝐵) ∧ (𝑥 ∈ 𝐴 ∧ 𝑤 ∈ 𝐴)) → (𝑓‘𝑤) ∈ ℂ)
29	11	cnmetdval 24681	. . . . . . . . . . . . 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 2768	. . . . . . . . . . 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 5153	. . . . . . . . . 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 3171	. . . . . . 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 3174	. . . . . 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 3173	. . . . 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 3171	. . . 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 24683	. . . . . 6 ⊢ (abs ∘ − ) ∈ (∞Met‘ℂ)
41		xmetres2 24261	. . . . . 6 ⊢ (((abs ∘ − ) ∈ (∞Met‘ℂ) ∧ 𝐴 ⊆ ℂ) → ((abs ∘ − ) ↾ (𝐴 × 𝐴)) ∈ (∞Met‘𝐴))
42	40, 41	mpan 689	. . . . 5 ⊢ (𝐴 ⊆ ℂ → ((abs ∘ − ) ↾ (𝐴 × 𝐴)) ∈ (∞Met‘𝐴))
43	4, 42	eqeltrid 2833	. . . 4 ⊢ (𝐴 ⊆ ℂ → 𝐶 ∈ (∞Met‘𝐴))
44		xmetres2 24261	. . . . . 6 ⊢ (((abs ∘ − ) ∈ (∞Met‘ℂ) ∧ 𝐵 ⊆ ℂ) → ((abs ∘ − ) ↾ (𝐵 × 𝐵)) ∈ (∞Met‘𝐵))
45	40, 44	mpan 689	. . . . 5 ⊢ (𝐵 ⊆ ℂ → ((abs ∘ − ) ↾ (𝐵 × 𝐵)) ∈ (∞Met‘𝐵))
46	21, 45	eqeltrid 2833	. . . 4 ⊢ (𝐵 ⊆ ℂ → 𝐷 ∈ (∞Met‘𝐵))
47		cncfmet.3	. . . . 5 ⊢ 𝐽 = (MetOpen‘𝐶)
48		cncfmet.4	. . . . 5 ⊢ 𝐾 = (MetOpen‘𝐷)
49	47, 48	metcn 24446	. . . 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 24803	. . 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 2726	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 1534 ∈ wcel 2099 ∀wral 3057 ∃wrex 3066 ⊆ wss 3945 class class class wbr 5143 × cxp 5671 ↾ cres 5675 ∘ ccom 5677 ⟶wf 6539 ‘cfv 6543 (class class class)co 7415 ℂcc 11131 < clt 11273 − cmin 11469 ℝ⁺crp 13001 abscabs 15208 ∞Metcxmet 21258 MetOpencmopn 21263 Cn ccn 23122 –cn→ccncf 24790

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2167 ax-ext 2699 ax-sep 5294 ax-nul 5301 ax-pow 5360 ax-pr 5424 ax-un 7735 ax-cnex 11189 ax-resscn 11190 ax-1cn 11191 ax-icn 11192 ax-addcl 11193 ax-addrcl 11194 ax-mulcl 11195 ax-mulrcl 11196 ax-mulcom 11197 ax-addass 11198 ax-mulass 11199 ax-distr 11200 ax-i2m1 11201 ax-1ne0 11202 ax-1rid 11203 ax-rnegex 11204 ax-rrecex 11205 ax-cnre 11206 ax-pre-lttri 11207 ax-pre-lttrn 11208 ax-pre-ltadd 11209 ax-pre-mulgt0 11210 ax-pre-sup 11211

This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2530 df-eu 2559 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2937 df-nel 3043 df-ral 3058 df-rex 3067 df-rmo 3372 df-reu 3373 df-rab 3429 df-v 3472 df-sbc 3776 df-csb 3891 df-dif 3948 df-un 3950 df-in 3952 df-ss 3962 df-pss 3964 df-nul 4320 df-if 4526 df-pw 4601 df-sn 4626 df-pr 4628 df-op 4632 df-uni 4905 df-iun 4994 df-br 5144 df-opab 5206 df-mpt 5227 df-tr 5261 df-id 5571 df-eprel 5577 df-po 5585 df-so 5586 df-fr 5628 df-we 5630 df-xp 5679 df-rel 5680 df-cnv 5681 df-co 5682 df-dm 5683 df-rn 5684 df-res 5685 df-ima 5686 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7371 df-ov 7418 df-oprab 7419 df-mpo 7420 df-om 7866 df-1st 7988 df-2nd 7989 df-frecs 8281 df-wrecs 8312 df-recs 8386 df-rdg 8425 df-er 8719 df-map 8841 df-en 8959 df-dom 8960 df-sdom 8961 df-sup 9460 df-inf 9461 df-pnf 11275 df-mnf 11276 df-xr 11277 df-ltxr 11278 df-le 11279 df-sub 11471 df-neg 11472 df-div 11897 df-nn 12238 df-2 12300 df-3 12301 df-n0 12498 df-z 12584 df-uz 12848 df-q 12958 df-rp 13002 df-xneg 13119 df-xadd 13120 df-xmul 13121 df-seq 13994 df-exp 14054 df-cj 15073 df-re 15074 df-im 15075 df-sqrt 15209 df-abs 15210 df-topgen 17419 df-psmet 21265 df-xmet 21266 df-met 21267 df-bl 21268 df-mopn 21269 df-top 22790 df-topon 22807 df-bases 22843 df-cn 23125 df-cnp 23126 df-cncf 24792

This theorem is referenced by: cncfcn 24824 evthicc 25382 cncfres 37233

W3C validator