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Theorem divcn 23473

Description: Complex number division is a continuous function, when the second argument is nonzero. (Contributed by Mario Carneiro, 12-Aug-2014.)

**Hypotheses**
Ref	Expression
addcn.j	⊢ 𝐽 = (TopOpen‘ℂ_fld)
divcn.k	⊢ 𝐾 = (𝐽 ↾_t (ℂ ∖ {0}))

**Assertion**
Ref	Expression
divcn	⊢ / ∈ ((𝐽 ×_t 𝐾) Cn 𝐽)

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

Step	Hyp	Ref	Expression
1		df-div 11287	. . 3 ⊢ / = (𝑥 ∈ ℂ, 𝑦 ∈ (ℂ ∖ {0}) ↦ (℩𝑧 ∈ ℂ (𝑦 · 𝑧) = 𝑥))
2		eldifsn 4680	. . . . 5 ⊢ (𝑦 ∈ (ℂ ∖ {0}) ↔ (𝑦 ∈ ℂ ∧ 𝑦 ≠ 0))
3		divval 11289	. . . . . . 7 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ ∧ 𝑦 ≠ 0) → (𝑥 / 𝑦) = (℩𝑧 ∈ ℂ (𝑦 · 𝑧) = 𝑥))
4		divrec 11303	. . . . . . 7 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ ∧ 𝑦 ≠ 0) → (𝑥 / 𝑦) = (𝑥 · (1 / 𝑦)))
5	3, 4	eqtr3d 2835	. . . . . 6 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ ∧ 𝑦 ≠ 0) → (℩𝑧 ∈ ℂ (𝑦 · 𝑧) = 𝑥) = (𝑥 · (1 / 𝑦)))
6	5	3expb 1117	. . . . 5 ⊢ ((𝑥 ∈ ℂ ∧ (𝑦 ∈ ℂ ∧ 𝑦 ≠ 0)) → (℩𝑧 ∈ ℂ (𝑦 · 𝑧) = 𝑥) = (𝑥 · (1 / 𝑦)))
7	2, 6	sylan2b 596	. . . 4 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → (℩𝑧 ∈ ℂ (𝑦 · 𝑧) = 𝑥) = (𝑥 · (1 / 𝑦)))
8	7	mpoeq3ia 7211	. . 3 ⊢ (𝑥 ∈ ℂ, 𝑦 ∈ (ℂ ∖ {0}) ↦ (℩𝑧 ∈ ℂ (𝑦 · 𝑧) = 𝑥)) = (𝑥 ∈ ℂ, 𝑦 ∈ (ℂ ∖ {0}) ↦ (𝑥 · (1 / 𝑦)))
9	1, 8	eqtri 2821	. 2 ⊢ / = (𝑥 ∈ ℂ, 𝑦 ∈ (ℂ ∖ {0}) ↦ (𝑥 · (1 / 𝑦)))
10		addcn.j	. . . . . 6 ⊢ 𝐽 = (TopOpen‘ℂ_fld)
11	10	cnfldtopon 23388	. . . . 5 ⊢ 𝐽 ∈ (TopOn‘ℂ)
12	11	a1i 11	. . . 4 ⊢ (⊤ → 𝐽 ∈ (TopOn‘ℂ))
13		divcn.k	. . . . 5 ⊢ 𝐾 = (𝐽 ↾_t (ℂ ∖ {0}))
14		difss 4059	. . . . . 6 ⊢ (ℂ ∖ {0}) ⊆ ℂ
15		resttopon 21766	. . . . . 6 ⊢ ((𝐽 ∈ (TopOn‘ℂ) ∧ (ℂ ∖ {0}) ⊆ ℂ) → (𝐽 ↾_t (ℂ ∖ {0})) ∈ (TopOn‘(ℂ ∖ {0})))
16	12, 14, 15	sylancl 589	. . . . 5 ⊢ (⊤ → (𝐽 ↾_t (ℂ ∖ {0})) ∈ (TopOn‘(ℂ ∖ {0})))
17	13, 16	eqeltrid 2894	. . . 4 ⊢ (⊤ → 𝐾 ∈ (TopOn‘(ℂ ∖ {0})))
18	12, 17	cnmpt1st 22273	. . . 4 ⊢ (⊤ → (𝑥 ∈ ℂ, 𝑦 ∈ (ℂ ∖ {0}) ↦ 𝑥) ∈ ((𝐽 ×_t 𝐾) Cn 𝐽))
19	12, 17	cnmpt2nd 22274	. . . . 5 ⊢ (⊤ → (𝑥 ∈ ℂ, 𝑦 ∈ (ℂ ∖ {0}) ↦ 𝑦) ∈ ((𝐽 ×_t 𝐾) Cn 𝐾))
20		eqid 2798	. . . . . . . 8 ⊢ (𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧)) = (𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))
21		eldifsn 4680	. . . . . . . . 9 ⊢ (𝑧 ∈ (ℂ ∖ {0}) ↔ (𝑧 ∈ ℂ ∧ 𝑧 ≠ 0))
22		reccl 11294	. . . . . . . . 9 ⊢ ((𝑧 ∈ ℂ ∧ 𝑧 ≠ 0) → (1 / 𝑧) ∈ ℂ)
23	21, 22	sylbi 220	. . . . . . . 8 ⊢ (𝑧 ∈ (ℂ ∖ {0}) → (1 / 𝑧) ∈ ℂ)
24	20, 23	fmpti 6853	. . . . . . 7 ⊢ (𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧)):(ℂ ∖ {0})⟶ℂ
25		eqid 2798	. . . . . . . . . 10 ⊢ (if(1 ≤ ((abs‘𝑥) · 𝑦), 1, ((abs‘𝑥) · 𝑦)) · ((abs‘𝑥) / 2)) = (if(1 ≤ ((abs‘𝑥) · 𝑦), 1, ((abs‘𝑥) · 𝑦)) · ((abs‘𝑥) / 2))
26	25	reccn2 14945	. . . . . . . . 9 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ ℝ⁺) → ∃𝑢 ∈ ℝ⁺ ∀𝑤 ∈ (ℂ ∖ {0})((abs‘(𝑤 − 𝑥)) < 𝑢 → (abs‘((1 / 𝑤) − (1 / 𝑥))) < 𝑦))
27		ovres 7294	. . . . . . . . . . . . . . 15 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑤 ∈ (ℂ ∖ {0})) → (𝑥((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑤) = (𝑥(abs ∘ − )𝑤))
28		eldifi 4054	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 ∈ (ℂ ∖ {0}) → 𝑥 ∈ ℂ)
29		eldifi 4054	. . . . . . . . . . . . . . . 16 ⊢ (𝑤 ∈ (ℂ ∖ {0}) → 𝑤 ∈ ℂ)
30		eqid 2798	. . . . . . . . . . . . . . . . . 18 ⊢ (abs ∘ − ) = (abs ∘ − )
31	30	cnmetdval 23376	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑥 ∈ ℂ ∧ 𝑤 ∈ ℂ) → (𝑥(abs ∘ − )𝑤) = (abs‘(𝑥 − 𝑤)))
32		abssub 14678	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑥 ∈ ℂ ∧ 𝑤 ∈ ℂ) → (abs‘(𝑥 − 𝑤)) = (abs‘(𝑤 − 𝑥)))
33	31, 32	eqtrd 2833	. . . . . . . . . . . . . . . 16 ⊢ ((𝑥 ∈ ℂ ∧ 𝑤 ∈ ℂ) → (𝑥(abs ∘ − )𝑤) = (abs‘(𝑤 − 𝑥)))
34	28, 29, 33	syl2an 598	. . . . . . . . . . . . . . 15 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑤 ∈ (ℂ ∖ {0})) → (𝑥(abs ∘ − )𝑤) = (abs‘(𝑤 − 𝑥)))
35	27, 34	eqtrd 2833	. . . . . . . . . . . . . 14 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑤 ∈ (ℂ ∖ {0})) → (𝑥((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑤) = (abs‘(𝑤 − 𝑥)))
36	35	breq1d 5040	. . . . . . . . . . . . 13 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑤 ∈ (ℂ ∖ {0})) → ((𝑥((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑤) < 𝑢 ↔ (abs‘(𝑤 − 𝑥)) < 𝑢))
37		oveq2 7143	. . . . . . . . . . . . . . . . 17 ⊢ (𝑧 = 𝑥 → (1 / 𝑧) = (1 / 𝑥))
38		ovex 7168	. . . . . . . . . . . . . . . . 17 ⊢ (1 / 𝑥) ∈ V
39	37, 20, 38	fvmpt 6745	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 ∈ (ℂ ∖ {0}) → ((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑥) = (1 / 𝑥))
40		oveq2 7143	. . . . . . . . . . . . . . . . 17 ⊢ (𝑧 = 𝑤 → (1 / 𝑧) = (1 / 𝑤))
41		ovex 7168	. . . . . . . . . . . . . . . . 17 ⊢ (1 / 𝑤) ∈ V
42	40, 20, 41	fvmpt 6745	. . . . . . . . . . . . . . . 16 ⊢ (𝑤 ∈ (ℂ ∖ {0}) → ((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑤) = (1 / 𝑤))
43	39, 42	oveqan12d 7154	. . . . . . . . . . . . . . 15 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑤 ∈ (ℂ ∖ {0})) → (((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑥)(abs ∘ − )((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑤)) = ((1 / 𝑥)(abs ∘ − )(1 / 𝑤)))
44		eldifsn 4680	. . . . . . . . . . . . . . . . 17 ⊢ (𝑥 ∈ (ℂ ∖ {0}) ↔ (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0))
45		reccl 11294	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑥 ∈ ℂ ∧ 𝑥 ≠ 0) → (1 / 𝑥) ∈ ℂ)
46	44, 45	sylbi 220	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 ∈ (ℂ ∖ {0}) → (1 / 𝑥) ∈ ℂ)
47		eldifsn 4680	. . . . . . . . . . . . . . . . 17 ⊢ (𝑤 ∈ (ℂ ∖ {0}) ↔ (𝑤 ∈ ℂ ∧ 𝑤 ≠ 0))
48		reccl 11294	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑤 ∈ ℂ ∧ 𝑤 ≠ 0) → (1 / 𝑤) ∈ ℂ)
49	47, 48	sylbi 220	. . . . . . . . . . . . . . . 16 ⊢ (𝑤 ∈ (ℂ ∖ {0}) → (1 / 𝑤) ∈ ℂ)
50	30	cnmetdval 23376	. . . . . . . . . . . . . . . . 17 ⊢ (((1 / 𝑥) ∈ ℂ ∧ (1 / 𝑤) ∈ ℂ) → ((1 / 𝑥)(abs ∘ − )(1 / 𝑤)) = (abs‘((1 / 𝑥) − (1 / 𝑤))))
51		abssub 14678	. . . . . . . . . . . . . . . . 17 ⊢ (((1 / 𝑥) ∈ ℂ ∧ (1 / 𝑤) ∈ ℂ) → (abs‘((1 / 𝑥) − (1 / 𝑤))) = (abs‘((1 / 𝑤) − (1 / 𝑥))))
52	50, 51	eqtrd 2833	. . . . . . . . . . . . . . . 16 ⊢ (((1 / 𝑥) ∈ ℂ ∧ (1 / 𝑤) ∈ ℂ) → ((1 / 𝑥)(abs ∘ − )(1 / 𝑤)) = (abs‘((1 / 𝑤) − (1 / 𝑥))))
53	46, 49, 52	syl2an 598	. . . . . . . . . . . . . . 15 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑤 ∈ (ℂ ∖ {0})) → ((1 / 𝑥)(abs ∘ − )(1 / 𝑤)) = (abs‘((1 / 𝑤) − (1 / 𝑥))))
54	43, 53	eqtrd 2833	. . . . . . . . . . . . . 14 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑤 ∈ (ℂ ∖ {0})) → (((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑥)(abs ∘ − )((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑤)) = (abs‘((1 / 𝑤) − (1 / 𝑥))))
55	54	breq1d 5040	. . . . . . . . . . . . 13 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑤 ∈ (ℂ ∖ {0})) → ((((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑥)(abs ∘ − )((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑤)) < 𝑦 ↔ (abs‘((1 / 𝑤) − (1 / 𝑥))) < 𝑦))
56	36, 55	imbi12d 348	. . . . . . . . . . . 12 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑤 ∈ (ℂ ∖ {0})) → (((𝑥((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑤) < 𝑢 → (((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑥)(abs ∘ − )((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑤)) < 𝑦) ↔ ((abs‘(𝑤 − 𝑥)) < 𝑢 → (abs‘((1 / 𝑤) − (1 / 𝑥))) < 𝑦)))
57	56	ralbidva 3161	. . . . . . . . . . 11 ⊢ (𝑥 ∈ (ℂ ∖ {0}) → (∀𝑤 ∈ (ℂ ∖ {0})((𝑥((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑤) < 𝑢 → (((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑥)(abs ∘ − )((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑤)) < 𝑦) ↔ ∀𝑤 ∈ (ℂ ∖ {0})((abs‘(𝑤 − 𝑥)) < 𝑢 → (abs‘((1 / 𝑤) − (1 / 𝑥))) < 𝑦)))
58	57	rexbidv 3256	. . . . . . . . . 10 ⊢ (𝑥 ∈ (ℂ ∖ {0}) → (∃𝑢 ∈ ℝ⁺ ∀𝑤 ∈ (ℂ ∖ {0})((𝑥((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑤) < 𝑢 → (((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑥)(abs ∘ − )((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑤)) < 𝑦) ↔ ∃𝑢 ∈ ℝ⁺ ∀𝑤 ∈ (ℂ ∖ {0})((abs‘(𝑤 − 𝑥)) < 𝑢 → (abs‘((1 / 𝑤) − (1 / 𝑥))) < 𝑦)))
59	58	adantr 484	. . . . . . . . 9 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ ℝ⁺) → (∃𝑢 ∈ ℝ⁺ ∀𝑤 ∈ (ℂ ∖ {0})((𝑥((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑤) < 𝑢 → (((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑥)(abs ∘ − )((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑤)) < 𝑦) ↔ ∃𝑢 ∈ ℝ⁺ ∀𝑤 ∈ (ℂ ∖ {0})((abs‘(𝑤 − 𝑥)) < 𝑢 → (abs‘((1 / 𝑤) − (1 / 𝑥))) < 𝑦)))
60	26, 59	mpbird 260	. . . . . . . 8 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ ℝ⁺) → ∃𝑢 ∈ ℝ⁺ ∀𝑤 ∈ (ℂ ∖ {0})((𝑥((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑤) < 𝑢 → (((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑥)(abs ∘ − )((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑤)) < 𝑦))
61	60	rgen2 3168	. . . . . . 7 ⊢ ∀𝑥 ∈ (ℂ ∖ {0})∀𝑦 ∈ ℝ⁺ ∃𝑢 ∈ ℝ⁺ ∀𝑤 ∈ (ℂ ∖ {0})((𝑥((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑤) < 𝑢 → (((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑥)(abs ∘ − )((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑤)) < 𝑦)
62		cnxmet 23378	. . . . . . . . 9 ⊢ (abs ∘ − ) ∈ (∞Met‘ℂ)
63		xmetres2 22968	. . . . . . . . 9 ⊢ (((abs ∘ − ) ∈ (∞Met‘ℂ) ∧ (ℂ ∖ {0}) ⊆ ℂ) → ((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0}))) ∈ (∞Met‘(ℂ ∖ {0})))
64	62, 14, 63	mp2an 691	. . . . . . . 8 ⊢ ((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0}))) ∈ (∞Met‘(ℂ ∖ {0}))
65		eqid 2798	. . . . . . . . . . . 12 ⊢ ((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0}))) = ((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))
66	10	cnfldtopn 23387	. . . . . . . . . . . 12 ⊢ 𝐽 = (MetOpen‘(abs ∘ − ))
67		eqid 2798	. . . . . . . . . . . 12 ⊢ (MetOpen‘((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))) = (MetOpen‘((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0}))))
68	65, 66, 67	metrest 23131	. . . . . . . . . . 11 ⊢ (((abs ∘ − ) ∈ (∞Met‘ℂ) ∧ (ℂ ∖ {0}) ⊆ ℂ) → (𝐽 ↾_t (ℂ ∖ {0})) = (MetOpen‘((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))))
69	62, 14, 68	mp2an 691	. . . . . . . . . 10 ⊢ (𝐽 ↾_t (ℂ ∖ {0})) = (MetOpen‘((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0}))))
70	13, 69	eqtri 2821	. . . . . . . . 9 ⊢ 𝐾 = (MetOpen‘((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0}))))
71	70, 66	metcn 23150	. . . . . . . 8 ⊢ ((((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0}))) ∈ (∞Met‘(ℂ ∖ {0})) ∧ (abs ∘ − ) ∈ (∞Met‘ℂ)) → ((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧)) ∈ (𝐾 Cn 𝐽) ↔ ((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧)):(ℂ ∖ {0})⟶ℂ ∧ ∀𝑥 ∈ (ℂ ∖ {0})∀𝑦 ∈ ℝ⁺ ∃𝑢 ∈ ℝ⁺ ∀𝑤 ∈ (ℂ ∖ {0})((𝑥((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑤) < 𝑢 → (((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑥)(abs ∘ − )((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑤)) < 𝑦))))
72	64, 62, 71	mp2an 691	. . . . . . 7 ⊢ ((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧)) ∈ (𝐾 Cn 𝐽) ↔ ((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧)):(ℂ ∖ {0})⟶ℂ ∧ ∀𝑥 ∈ (ℂ ∖ {0})∀𝑦 ∈ ℝ⁺ ∃𝑢 ∈ ℝ⁺ ∀𝑤 ∈ (ℂ ∖ {0})((𝑥((abs ∘ − ) ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑤) < 𝑢 → (((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑥)(abs ∘ − )((𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧))‘𝑤)) < 𝑦)))
73	24, 61, 72	mpbir2an 710	. . . . . 6 ⊢ (𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧)) ∈ (𝐾 Cn 𝐽)
74	73	a1i 11	. . . . 5 ⊢ (⊤ → (𝑧 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑧)) ∈ (𝐾 Cn 𝐽))
75		oveq2 7143	. . . . 5 ⊢ (𝑧 = 𝑦 → (1 / 𝑧) = (1 / 𝑦))
76	12, 17, 19, 17, 74, 75	cnmpt21 22276	. . . 4 ⊢ (⊤ → (𝑥 ∈ ℂ, 𝑦 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑦)) ∈ ((𝐽 ×_t 𝐾) Cn 𝐽))
77	10	mulcn 23472	. . . . 5 ⊢ · ∈ ((𝐽 ×_t 𝐽) Cn 𝐽)
78	77	a1i 11	. . . 4 ⊢ (⊤ → · ∈ ((𝐽 ×_t 𝐽) Cn 𝐽))
79	12, 17, 18, 76, 78	cnmpt22f 22280	. . 3 ⊢ (⊤ → (𝑥 ∈ ℂ, 𝑦 ∈ (ℂ ∖ {0}) ↦ (𝑥 · (1 / 𝑦))) ∈ ((𝐽 ×_t 𝐾) Cn 𝐽))
80	79	mptru 1545	. 2 ⊢ (𝑥 ∈ ℂ, 𝑦 ∈ (ℂ ∖ {0}) ↦ (𝑥 · (1 / 𝑦))) ∈ ((𝐽 ×_t 𝐾) Cn 𝐽)
81	9, 80	eqeltri 2886	1 ⊢ / ∈ ((𝐽 ×_t 𝐾) Cn 𝐽)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 209 ∧ wa 399 ∧ w3a 1084 = wceq 1538 ⊤wtru 1539 ∈ wcel 2111 ≠ wne 2987 ∀wral 3106 ∃wrex 3107 ∖ cdif 3878 ⊆ wss 3881 ifcif 4425 {csn 4525 class class class wbr 5030 ↦ cmpt 5110 × cxp 5517 ↾ cres 5521 ∘ ccom 5523 ⟶wf 6320 ‘cfv 6324 ℩crio 7092 (class class class)co 7135 ∈ cmpo 7137 ℂcc 10524 0cc0 10526 1c1 10527 · cmul 10531 < clt 10664 ≤ cle 10665 − cmin 10859 / cdiv 11286 2c2 11680 ℝ⁺crp 12377 abscabs 14585 ↾_t crest 16686 TopOpenctopn 16687 ∞Metcxmet 20076 MetOpencmopn 20081 ℂ_fldccnfld 20091 TopOnctopon 21515 Cn ccn 21829 ×_t ctx 22165

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-rep 5154 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 ax-cnex 10582 ax-resscn 10583 ax-1cn 10584 ax-icn 10585 ax-addcl 10586 ax-addrcl 10587 ax-mulcl 10588 ax-mulrcl 10589 ax-mulcom 10590 ax-addass 10591 ax-mulass 10592 ax-distr 10593 ax-i2m1 10594 ax-1ne0 10595 ax-1rid 10596 ax-rnegex 10597 ax-rrecex 10598 ax-cnre 10599 ax-pre-lttri 10600 ax-pre-lttrn 10601 ax-pre-ltadd 10602 ax-pre-mulgt0 10603 ax-pre-sup 10604 ax-mulf 10606

This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-nel 3092 df-ral 3111 df-rex 3112 df-reu 3113 df-rmo 3114 df-rab 3115 df-v 3443 df-sbc 3721 df-csb 3829 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-pss 3900 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-tp 4530 df-op 4532 df-uni 4801 df-int 4839 df-iun 4883 df-iin 4884 df-br 5031 df-opab 5093 df-mpt 5111 df-tr 5137 df-id 5425 df-eprel 5430 df-po 5438 df-so 5439 df-fr 5478 df-se 5479 df-we 5480 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-pred 6116 df-ord 6162 df-on 6163 df-lim 6164 df-suc 6165 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-f1 6329 df-fo 6330 df-f1o 6331 df-fv 6332 df-isom 6333 df-riota 7093 df-ov 7138 df-oprab 7139 df-mpo 7140 df-of 7389 df-om 7561 df-1st 7671 df-2nd 7672 df-supp 7814 df-wrecs 7930 df-recs 7991 df-rdg 8029 df-1o 8085 df-2o 8086 df-oadd 8089 df-er 8272 df-map 8391 df-ixp 8445 df-en 8493 df-dom 8494 df-sdom 8495 df-fin 8496 df-fsupp 8818 df-fi 8859 df-sup 8890 df-inf 8891 df-oi 8958 df-card 9352 df-pnf 10666 df-mnf 10667 df-xr 10668 df-ltxr 10669 df-le 10670 df-sub 10861 df-neg 10862 df-div 11287 df-nn 11626 df-2 11688 df-3 11689 df-4 11690 df-5 11691 df-6 11692 df-7 11693 df-8 11694 df-9 11695 df-n0 11886 df-z 11970 df-dec 12087 df-uz 12232 df-q 12337 df-rp 12378 df-xneg 12495 df-xadd 12496 df-xmul 12497 df-icc 12733 df-fz 12886 df-fzo 13029 df-seq 13365 df-exp 13426 df-hash 13687 df-cj 14450 df-re 14451 df-im 14452 df-sqrt 14586 df-abs 14587 df-struct 16477 df-ndx 16478 df-slot 16479 df-base 16481 df-sets 16482 df-ress 16483 df-plusg 16570 df-mulr 16571 df-starv 16572 df-sca 16573 df-vsca 16574 df-ip 16575 df-tset 16576 df-ple 16577 df-ds 16579 df-unif 16580 df-hom 16581 df-cco 16582 df-rest 16688 df-topn 16689 df-0g 16707 df-gsum 16708 df-topgen 16709 df-pt 16710 df-prds 16713 df-xrs 16767 df-qtop 16772 df-imas 16773 df-xps 16775 df-mre 16849 df-mrc 16850 df-acs 16852 df-mgm 17844 df-sgrp 17893 df-mnd 17904 df-submnd 17949 df-mulg 18217 df-cntz 18439 df-cmn 18900 df-psmet 20083 df-xmet 20084 df-met 20085 df-bl 20086 df-mopn 20087 df-cnfld 20092 df-top 21499 df-topon 21516 df-topsp 21538 df-bases 21551 df-cn 21832 df-cnp 21833 df-tx 22167 df-hmeo 22360 df-xms 22927 df-ms 22928 df-tms 22929

This theorem is referenced by: cdivcncf 23526 evth 23564 dvcnvlem 24579 lhop1lem 24616

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