areacirclem2 - Mathbox for Brendan Leahy

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Theorem areacirclem2 38341

Description: Endpoint-inclusive continuity of Cartesian ordinate of circle. (Contributed by Brendan Leahy, 29-Aug-2017.) (Revised by Brendan Leahy, 11-Jul-2018.)

**Assertion**
Ref	Expression
areacirclem2	⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → (𝑡 ∈ (-𝑅[,]𝑅) ↦ (√‘((𝑅↑2) − (𝑡↑2)))) ∈ ((-𝑅[,]𝑅)–cn→ℂ))

Distinct variable group: 𝑡,𝑅

Proof of Theorem areacirclem2 Dummy variable 𝑢 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		resqcl 14162	. . . . . . . 8 ⊢ (𝑅 ∈ ℝ → (𝑅↑2) ∈ ℝ)
2	1	adantr 485	. . . . . . 7 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → (𝑅↑2) ∈ ℝ)
3	2	adantr 485	. . . . . 6 ⊢ (((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) ∧ 𝑡 ∈ (-𝑅[,]𝑅)) → (𝑅↑2) ∈ ℝ)
4		renegcl 11522	. . . . . . . . . 10 ⊢ (𝑅 ∈ ℝ → -𝑅 ∈ ℝ)
5		iccssre 13457	. . . . . . . . . 10 ⊢ ((-𝑅 ∈ ℝ ∧ 𝑅 ∈ ℝ) → (-𝑅[,]𝑅) ⊆ ℝ)
6	4, 5	mpancom 700	. . . . . . . . 9 ⊢ (𝑅 ∈ ℝ → (-𝑅[,]𝑅) ⊆ ℝ)
7	6	sselda 3938	. . . . . . . 8 ⊢ ((𝑅 ∈ ℝ ∧ 𝑡 ∈ (-𝑅[,]𝑅)) → 𝑡 ∈ ℝ)
8	7	resqcld 14163	. . . . . . 7 ⊢ ((𝑅 ∈ ℝ ∧ 𝑡 ∈ (-𝑅[,]𝑅)) → (𝑡↑2) ∈ ℝ)
9	8	adantlr 727	. . . . . 6 ⊢ (((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) ∧ 𝑡 ∈ (-𝑅[,]𝑅)) → (𝑡↑2) ∈ ℝ)
10	3, 9	resubcld 11643	. . . . 5 ⊢ (((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) ∧ 𝑡 ∈ (-𝑅[,]𝑅)) → ((𝑅↑2) − (𝑡↑2)) ∈ ℝ)
11		elicc2 13439	. . . . . . . . 9 ⊢ ((-𝑅 ∈ ℝ ∧ 𝑅 ∈ ℝ) → (𝑡 ∈ (-𝑅[,]𝑅) ↔ (𝑡 ∈ ℝ ∧ -𝑅 ≤ 𝑡 ∧ 𝑡 ≤ 𝑅)))
12	4, 11	mpancom 700	. . . . . . . 8 ⊢ (𝑅 ∈ ℝ → (𝑡 ∈ (-𝑅[,]𝑅) ↔ (𝑡 ∈ ℝ ∧ -𝑅 ≤ 𝑡 ∧ 𝑡 ≤ 𝑅)))
13	12	adantr 485	. . . . . . 7 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → (𝑡 ∈ (-𝑅[,]𝑅) ↔ (𝑡 ∈ ℝ ∧ -𝑅 ≤ 𝑡 ∧ 𝑡 ≤ 𝑅)))
14	1	3ad2ant1 1151	. . . . . . . . . . . . . 14 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅 ∧ 𝑡 ∈ ℝ) → (𝑅↑2) ∈ ℝ)
15		resqcl 14162	. . . . . . . . . . . . . . 15 ⊢ (𝑡 ∈ ℝ → (𝑡↑2) ∈ ℝ)
16	15	3ad2ant3 1153	. . . . . . . . . . . . . 14 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅 ∧ 𝑡 ∈ ℝ) → (𝑡↑2) ∈ ℝ)
17	14, 16	subge0d 11805	. . . . . . . . . . . . 13 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅 ∧ 𝑡 ∈ ℝ) → (0 ≤ ((𝑅↑2) − (𝑡↑2)) ↔ (𝑡↑2) ≤ (𝑅↑2)))
18		absresq 15355	. . . . . . . . . . . . . . 15 ⊢ (𝑡 ∈ ℝ → ((abs‘𝑡)↑2) = (𝑡↑2))
19	18	3ad2ant3 1153	. . . . . . . . . . . . . 14 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅 ∧ 𝑡 ∈ ℝ) → ((abs‘𝑡)↑2) = (𝑡↑2))
20	19	breq1d 5120	. . . . . . . . . . . . 13 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅 ∧ 𝑡 ∈ ℝ) → (((abs‘𝑡)↑2) ≤ (𝑅↑2) ↔ (𝑡↑2) ≤ (𝑅↑2)))
21	17, 20	bitr4d 285	. . . . . . . . . . . 12 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅 ∧ 𝑡 ∈ ℝ) → (0 ≤ ((𝑅↑2) − (𝑡↑2)) ↔ ((abs‘𝑡)↑2) ≤ (𝑅↑2)))
22		recn 11191	. . . . . . . . . . . . . . 15 ⊢ (𝑡 ∈ ℝ → 𝑡 ∈ ℂ)
23	22	abscld 15492	. . . . . . . . . . . . . 14 ⊢ (𝑡 ∈ ℝ → (abs‘𝑡) ∈ ℝ)
24	23	3ad2ant3 1153	. . . . . . . . . . . . 13 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅 ∧ 𝑡 ∈ ℝ) → (abs‘𝑡) ∈ ℝ)
25		simp1 1154	. . . . . . . . . . . . 13 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅 ∧ 𝑡 ∈ ℝ) → 𝑅 ∈ ℝ)
26	22	absge0d 15500	. . . . . . . . . . . . . 14 ⊢ (𝑡 ∈ ℝ → 0 ≤ (abs‘𝑡))
27	26	3ad2ant3 1153	. . . . . . . . . . . . 13 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅 ∧ 𝑡 ∈ ℝ) → 0 ≤ (abs‘𝑡))
28		simp2 1155	. . . . . . . . . . . . 13 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅 ∧ 𝑡 ∈ ℝ) → 0 ≤ 𝑅)
29	24, 25, 27, 28	le2sqd 14295	. . . . . . . . . . . 12 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅 ∧ 𝑡 ∈ ℝ) → ((abs‘𝑡) ≤ 𝑅 ↔ ((abs‘𝑡)↑2) ≤ (𝑅↑2)))
30		simp3 1156	. . . . . . . . . . . . 13 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅 ∧ 𝑡 ∈ ℝ) → 𝑡 ∈ ℝ)
31	30, 25	absled 15486	. . . . . . . . . . . 12 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅 ∧ 𝑡 ∈ ℝ) → ((abs‘𝑡) ≤ 𝑅 ↔ (-𝑅 ≤ 𝑡 ∧ 𝑡 ≤ 𝑅)))
32	21, 29, 31	3bitr2d 310	. . . . . . . . . . 11 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅 ∧ 𝑡 ∈ ℝ) → (0 ≤ ((𝑅↑2) − (𝑡↑2)) ↔ (-𝑅 ≤ 𝑡 ∧ 𝑡 ≤ 𝑅)))
33	32	biimprd 251	. . . . . . . . . 10 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅 ∧ 𝑡 ∈ ℝ) → ((-𝑅 ≤ 𝑡 ∧ 𝑡 ≤ 𝑅) → 0 ≤ ((𝑅↑2) − (𝑡↑2))))
34	33	3expa 1136	. . . . . . . . 9 ⊢ (((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) ∧ 𝑡 ∈ ℝ) → ((-𝑅 ≤ 𝑡 ∧ 𝑡 ≤ 𝑅) → 0 ≤ ((𝑅↑2) − (𝑡↑2))))
35	34	exp4b 435	. . . . . . . 8 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → (𝑡 ∈ ℝ → (-𝑅 ≤ 𝑡 → (𝑡 ≤ 𝑅 → 0 ≤ ((𝑅↑2) − (𝑡↑2))))))
36	35	3impd 1367	. . . . . . 7 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → ((𝑡 ∈ ℝ ∧ -𝑅 ≤ 𝑡 ∧ 𝑡 ≤ 𝑅) → 0 ≤ ((𝑅↑2) − (𝑡↑2))))
37	13, 36	sylbid 243	. . . . . 6 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → (𝑡 ∈ (-𝑅[,]𝑅) → 0 ≤ ((𝑅↑2) − (𝑡↑2))))
38	37	imp 411	. . . . 5 ⊢ (((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) ∧ 𝑡 ∈ (-𝑅[,]𝑅)) → 0 ≤ ((𝑅↑2) − (𝑡↑2)))
39		elrege0 13482	. . . . 5 ⊢ (((𝑅↑2) − (𝑡↑2)) ∈ (0[,)+∞) ↔ (((𝑅↑2) − (𝑡↑2)) ∈ ℝ ∧ 0 ≤ ((𝑅↑2) − (𝑡↑2))))
40	10, 38, 39	sylanbrc 594	. . . 4 ⊢ (((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) ∧ 𝑡 ∈ (-𝑅[,]𝑅)) → ((𝑅↑2) − (𝑡↑2)) ∈ (0[,)+∞))
41		fvres 6902	. . . 4 ⊢ (((𝑅↑2) − (𝑡↑2)) ∈ (0[,)+∞) → ((√ ↾ (0[,)+∞))‘((𝑅↑2) − (𝑡↑2))) = (√‘((𝑅↑2) − (𝑡↑2))))
42	40, 41	syl 18	. . 3 ⊢ (((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) ∧ 𝑡 ∈ (-𝑅[,]𝑅)) → ((√ ↾ (0[,)+∞))‘((𝑅↑2) − (𝑡↑2))) = (√‘((𝑅↑2) − (𝑡↑2))))
43	42	mpteq2dva 5205	. 2 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → (𝑡 ∈ (-𝑅[,]𝑅) ↦ ((√ ↾ (0[,)+∞))‘((𝑅↑2) − (𝑡↑2)))) = (𝑡 ∈ (-𝑅[,]𝑅) ↦ (√‘((𝑅↑2) − (𝑡↑2)))))
44		eqid 2763	. . . . . . 7 ⊢ (TopOpen‘ℂ_fld) = (TopOpen‘ℂ_fld)
45	44	cnfldtopon 24920	. . . . . 6 ⊢ (TopOpen‘ℂ_fld) ∈ (TopOn‘ℂ)
46		ax-resscn 11158	. . . . . . 7 ⊢ ℝ ⊆ ℂ
47	6, 46	sstrdi 3950	. . . . . 6 ⊢ (𝑅 ∈ ℝ → (-𝑅[,]𝑅) ⊆ ℂ)
48		resttopon 23299	. . . . . 6 ⊢ (((TopOpen‘ℂ_fld) ∈ (TopOn‘ℂ) ∧ (-𝑅[,]𝑅) ⊆ ℂ) → ((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅)) ∈ (TopOn‘(-𝑅[,]𝑅)))
49	45, 47, 48	sylancr 598	. . . . 5 ⊢ (𝑅 ∈ ℝ → ((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅)) ∈ (TopOn‘(-𝑅[,]𝑅)))
50	49	adantr 485	. . . 4 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → ((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅)) ∈ (TopOn‘(-𝑅[,]𝑅)))
51	47	resmptd 6044	. . . . . . 7 ⊢ (𝑅 ∈ ℝ → ((𝑡 ∈ ℂ ↦ ((𝑅↑2) − (𝑡↑2))) ↾ (-𝑅[,]𝑅)) = (𝑡 ∈ (-𝑅[,]𝑅) ↦ ((𝑅↑2) − (𝑡↑2))))
52	45	a1i 11	. . . . . . . . 9 ⊢ (𝑅 ∈ ℝ → (TopOpen‘ℂ_fld) ∈ (TopOn‘ℂ))
53		recn 11191	. . . . . . . . . . 11 ⊢ (𝑅 ∈ ℝ → 𝑅 ∈ ℂ)
54	53	sqcld 14182	. . . . . . . . . 10 ⊢ (𝑅 ∈ ℝ → (𝑅↑2) ∈ ℂ)
55	52, 52, 54	cnmptc 23800	. . . . . . . . 9 ⊢ (𝑅 ∈ ℝ → (𝑡 ∈ ℂ ↦ (𝑅↑2)) ∈ ((TopOpen‘ℂ_fld) Cn (TopOpen‘ℂ_fld)))
56	44	sqcn 25014	. . . . . . . . . 10 ⊢ (𝑡 ∈ ℂ ↦ (𝑡↑2)) ∈ ((TopOpen‘ℂ_fld) Cn (TopOpen‘ℂ_fld))
57	56	a1i 11	. . . . . . . . 9 ⊢ (𝑅 ∈ ℝ → (𝑡 ∈ ℂ ↦ (𝑡↑2)) ∈ ((TopOpen‘ℂ_fld) Cn (TopOpen‘ℂ_fld)))
58	44	subcn 25005	. . . . . . . . . 10 ⊢ − ∈ (((TopOpen‘ℂ_fld) ×_t (TopOpen‘ℂ_fld)) Cn (TopOpen‘ℂ_fld))
59	58	a1i 11	. . . . . . . . 9 ⊢ (𝑅 ∈ ℝ → − ∈ (((TopOpen‘ℂ_fld) ×_t (TopOpen‘ℂ_fld)) Cn (TopOpen‘ℂ_fld)))
60	52, 55, 57, 59	cnmpt12f 23804	. . . . . . . 8 ⊢ (𝑅 ∈ ℝ → (𝑡 ∈ ℂ ↦ ((𝑅↑2) − (𝑡↑2))) ∈ ((TopOpen‘ℂ_fld) Cn (TopOpen‘ℂ_fld)))
61	45	toponunii 23054	. . . . . . . . 9 ⊢ ℂ = ∪ (TopOpen‘ℂ_fld)
62	61	cnrest 23423	. . . . . . . 8 ⊢ (((𝑡 ∈ ℂ ↦ ((𝑅↑2) − (𝑡↑2))) ∈ ((TopOpen‘ℂ_fld) Cn (TopOpen‘ℂ_fld)) ∧ (-𝑅[,]𝑅) ⊆ ℂ) → ((𝑡 ∈ ℂ ↦ ((𝑅↑2) − (𝑡↑2))) ↾ (-𝑅[,]𝑅)) ∈ (((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅)) Cn (TopOpen‘ℂ_fld)))
63	60, 47, 62	syl2anc 595	. . . . . . 7 ⊢ (𝑅 ∈ ℝ → ((𝑡 ∈ ℂ ↦ ((𝑅↑2) − (𝑡↑2))) ↾ (-𝑅[,]𝑅)) ∈ (((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅)) Cn (TopOpen‘ℂ_fld)))
64	51, 63	eqeltrrd 2864	. . . . . 6 ⊢ (𝑅 ∈ ℝ → (𝑡 ∈ (-𝑅[,]𝑅) ↦ ((𝑅↑2) − (𝑡↑2))) ∈ (((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅)) Cn (TopOpen‘ℂ_fld)))
65	64	adantr 485	. . . . 5 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → (𝑡 ∈ (-𝑅[,]𝑅) ↦ ((𝑅↑2) − (𝑡↑2))) ∈ (((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅)) Cn (TopOpen‘ℂ_fld)))
66	45	a1i 11	. . . . . 6 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → (TopOpen‘ℂ_fld) ∈ (TopOn‘ℂ))
67		eqid 2763	. . . . . . . 8 ⊢ (𝑡 ∈ (-𝑅[,]𝑅) ↦ ((𝑅↑2) − (𝑡↑2))) = (𝑡 ∈ (-𝑅[,]𝑅) ↦ ((𝑅↑2) − (𝑡↑2)))
68	67	rnmpt 5949	. . . . . . 7 ⊢ ran (𝑡 ∈ (-𝑅[,]𝑅) ↦ ((𝑅↑2) − (𝑡↑2))) = {𝑢 ∣ ∃𝑡 ∈ (-𝑅[,]𝑅)𝑢 = ((𝑅↑2) − (𝑡↑2))}
69		simp3 1156	. . . . . . . . . 10 ⊢ (((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) ∧ 𝑡 ∈ (-𝑅[,]𝑅) ∧ 𝑢 = ((𝑅↑2) − (𝑡↑2))) → 𝑢 = ((𝑅↑2) − (𝑡↑2)))
70	40	3adant3 1150	. . . . . . . . . 10 ⊢ (((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) ∧ 𝑡 ∈ (-𝑅[,]𝑅) ∧ 𝑢 = ((𝑅↑2) − (𝑡↑2))) → ((𝑅↑2) − (𝑡↑2)) ∈ (0[,)+∞))
71	69, 70	eqeltrd 2863	. . . . . . . . 9 ⊢ (((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) ∧ 𝑡 ∈ (-𝑅[,]𝑅) ∧ 𝑢 = ((𝑅↑2) − (𝑡↑2))) → 𝑢 ∈ (0[,)+∞))
72	71	rexlimdv3a 3170	. . . . . . . 8 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → (∃𝑡 ∈ (-𝑅[,]𝑅)𝑢 = ((𝑅↑2) − (𝑡↑2)) → 𝑢 ∈ (0[,)+∞)))
73	72	abssdv 4022	. . . . . . 7 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → {𝑢 ∣ ∃𝑡 ∈ (-𝑅[,]𝑅)𝑢 = ((𝑅↑2) − (𝑡↑2))} ⊆ (0[,)+∞))
74	68, 73	eqsstrid 3976	. . . . . 6 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → ran (𝑡 ∈ (-𝑅[,]𝑅) ↦ ((𝑅↑2) − (𝑡↑2))) ⊆ (0[,)+∞))
75		rge0ssre 13484	. . . . . . . 8 ⊢ (0[,)+∞) ⊆ ℝ
76	75, 46	sstri 3947	. . . . . . 7 ⊢ (0[,)+∞) ⊆ ℂ
77	76	a1i 11	. . . . . 6 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → (0[,)+∞) ⊆ ℂ)
78		cnrest2 23424	. . . . . 6 ⊢ (((TopOpen‘ℂ_fld) ∈ (TopOn‘ℂ) ∧ ran (𝑡 ∈ (-𝑅[,]𝑅) ↦ ((𝑅↑2) − (𝑡↑2))) ⊆ (0[,)+∞) ∧ (0[,)+∞) ⊆ ℂ) → ((𝑡 ∈ (-𝑅[,]𝑅) ↦ ((𝑅↑2) − (𝑡↑2))) ∈ (((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅)) Cn (TopOpen‘ℂ_fld)) ↔ (𝑡 ∈ (-𝑅[,]𝑅) ↦ ((𝑅↑2) − (𝑡↑2))) ∈ (((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅)) Cn ((TopOpen‘ℂ_fld) ↾_t (0[,)+∞)))))
79	66, 74, 77, 78	syl3anc 1398	. . . . 5 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → ((𝑡 ∈ (-𝑅[,]𝑅) ↦ ((𝑅↑2) − (𝑡↑2))) ∈ (((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅)) Cn (TopOpen‘ℂ_fld)) ↔ (𝑡 ∈ (-𝑅[,]𝑅) ↦ ((𝑅↑2) − (𝑡↑2))) ∈ (((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅)) Cn ((TopOpen‘ℂ_fld) ↾_t (0[,)+∞)))))
80	65, 79	mpbid 235	. . . 4 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → (𝑡 ∈ (-𝑅[,]𝑅) ↦ ((𝑅↑2) − (𝑡↑2))) ∈ (((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅)) Cn ((TopOpen‘ℂ_fld) ↾_t (0[,)+∞))))
81		ssid 3960	. . . . . . . 8 ⊢ ℂ ⊆ ℂ
82		cncfss 25039	. . . . . . . 8 ⊢ ((ℝ ⊆ ℂ ∧ ℂ ⊆ ℂ) → ((0[,)+∞)–cn→ℝ) ⊆ ((0[,)+∞)–cn→ℂ))
83	46, 81, 82	mp2an 704	. . . . . . 7 ⊢ ((0[,)+∞)–cn→ℝ) ⊆ ((0[,)+∞)–cn→ℂ)
84		resqrtcn 26895	. . . . . . 7 ⊢ (√ ↾ (0[,)+∞)) ∈ ((0[,)+∞)–cn→ℝ)
85	83, 84	sselii 3935	. . . . . 6 ⊢ (√ ↾ (0[,)+∞)) ∈ ((0[,)+∞)–cn→ℂ)
86		eqid 2763	. . . . . . . 8 ⊢ ((TopOpen‘ℂ_fld) ↾_t (0[,)+∞)) = ((TopOpen‘ℂ_fld) ↾_t (0[,)+∞))
87		eqid 2763	. . . . . . . 8 ⊢ ((TopOpen‘ℂ_fld) ↾_t ℂ) = ((TopOpen‘ℂ_fld) ↾_t ℂ)
88	44, 86, 87	cncfcn 25050	. . . . . . 7 ⊢ (((0[,)+∞) ⊆ ℂ ∧ ℂ ⊆ ℂ) → ((0[,)+∞)–cn→ℂ) = (((TopOpen‘ℂ_fld) ↾_t (0[,)+∞)) Cn ((TopOpen‘ℂ_fld) ↾_t ℂ)))
89	76, 81, 88	mp2an 704	. . . . . 6 ⊢ ((0[,)+∞)–cn→ℂ) = (((TopOpen‘ℂ_fld) ↾_t (0[,)+∞)) Cn ((TopOpen‘ℂ_fld) ↾_t ℂ))
90	85, 89	eleqtri 2861	. . . . 5 ⊢ (√ ↾ (0[,)+∞)) ∈ (((TopOpen‘ℂ_fld) ↾_t (0[,)+∞)) Cn ((TopOpen‘ℂ_fld) ↾_t ℂ))
91	90	a1i 11	. . . 4 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → (√ ↾ (0[,)+∞)) ∈ (((TopOpen‘ℂ_fld) ↾_t (0[,)+∞)) Cn ((TopOpen‘ℂ_fld) ↾_t ℂ)))
92	50, 80, 91	cnmpt11f 23802	. . 3 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → (𝑡 ∈ (-𝑅[,]𝑅) ↦ ((√ ↾ (0[,)+∞))‘((𝑅↑2) − (𝑡↑2)))) ∈ (((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅)) Cn ((TopOpen‘ℂ_fld) ↾_t ℂ)))
93		eqid 2763	. . . . . 6 ⊢ ((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅)) = ((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅))
94	44, 93, 87	cncfcn 25050	. . . . 5 ⊢ (((-𝑅[,]𝑅) ⊆ ℂ ∧ ℂ ⊆ ℂ) → ((-𝑅[,]𝑅)–cn→ℂ) = (((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅)) Cn ((TopOpen‘ℂ_fld) ↾_t ℂ)))
95	47, 81, 94	sylancl 597	. . . 4 ⊢ (𝑅 ∈ ℝ → ((-𝑅[,]𝑅)–cn→ℂ) = (((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅)) Cn ((TopOpen‘ℂ_fld) ↾_t ℂ)))
96	95	adantr 485	. . 3 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → ((-𝑅[,]𝑅)–cn→ℂ) = (((TopOpen‘ℂ_fld) ↾_t (-𝑅[,]𝑅)) Cn ((TopOpen‘ℂ_fld) ↾_t ℂ)))
97	92, 96	eleqtrrd 2866	. 2 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → (𝑡 ∈ (-𝑅[,]𝑅) ↦ ((√ ↾ (0[,)+∞))‘((𝑅↑2) − (𝑡↑2)))) ∈ ((-𝑅[,]𝑅)–cn→ℂ))
98	43, 97	eqeltrrd 2864	1 ⊢ ((𝑅 ∈ ℝ ∧ 0 ≤ 𝑅) → (𝑡 ∈ (-𝑅[,]𝑅) ↦ (√‘((𝑅↑2) − (𝑡↑2)))) ∈ ((-𝑅[,]𝑅)–cn→ℂ))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 ∧ w3a 1103 = wceq 1570 ∈ wcel 2143 {cab 2741 ∃wrex 3089 ⊆ wss 3906 class class class wbr 5110 ↦ cmpt 5193 ran crn 5664 ↾ cres 5665 ‘cfv 6538 (class class class)co 7412 ℂcc 11099 ℝcr 11100 0cc0 11101 +∞cpnf 11241 ≤ cle 11245 − cmin 11442 -cneg 11443 2c2 12296 [,)cico 13375 [,]cicc 13376 ↑cexp 14099 √csqrt 15286 abscabs 15287 ↾_t crest 17474 TopOpenctopn 17475 ℂ_fldccnfld 21503 TopOnctopon 23048 Cn ccn 23362 ×_t ctx 23698 –cn→ccncf 25016

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5239 ax-sep 5258 ax-nul 5270 ax-pow 5338 ax-pr 5406 ax-un 7734 ax-inf2 9611 ax-cnex 11157 ax-resscn 11158 ax-1cn 11159 ax-icn 11160 ax-addcl 11161 ax-addrcl 11162 ax-mulcl 11163 ax-mulrcl 11164 ax-mulcom 11165 ax-addass 11166 ax-mulass 11167 ax-distr 11168 ax-i2m1 11169 ax-1ne0 11170 ax-1rid 11171 ax-rnegex 11172 ax-rrecex 11173 ax-cnre 11174 ax-pre-lttri 11175 ax-pre-lttrn 11176 ax-pre-ltadd 11177 ax-pre-mulgt0 11178 ax-pre-sup 11179 ax-addf 11180

This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-tp 4595 df-op 4597 df-uni 4874 df-int 4914 df-iun 4959 df-iin 4960 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-se 5617 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-isom 6547 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-of 7676 df-om 7864 df-1st 7987 df-2nd 7988 df-supp 8158 df-frecs 8279 df-wrecs 8310 df-recs 8359 df-rdg 8398 df-1o 8454 df-2o 8455 df-er 8695 df-map 8827 df-pm 8828 df-ixp 8897 df-en 8945 df-dom 8946 df-sdom 8947 df-fin 8948 df-fsupp 9323 df-fi 9372 df-sup 9403 df-inf 9404 df-oi 9473 df-card 9926 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11444 df-neg 11445 df-div 11873 df-nn 12235 df-2 12304 df-3 12305 df-4 12306 df-5 12307 df-6 12308 df-7 12309 df-8 12310 df-9 12311 df-n0 12506 df-z 12593 df-dec 12713 df-uz 12864 df-q 12974 df-rp 13018 df-xneg 13138 df-xadd 13139 df-xmul 13140 df-ioo 13377 df-ioc 13378 df-ico 13379 df-icc 13380 df-fz 13537 df-fzo 13685 df-fl 13827 df-mod 13905 df-seq 14040 df-exp 14100 df-fac 14312 df-bc 14341 df-hash 14369 df-shft 15106 df-cj 15152 df-re 15153 df-im 15154 df-sqrt 15288 df-abs 15289 df-limsup 15524 df-clim 15541 df-rlim 15542 df-sum 15740 df-ef 16122 df-sin 16124 df-cos 16125 df-tan 16126 df-pi 16127 df-struct 17208 df-sets 17225 df-slot 17243 df-ndx 17255 df-base 17271 df-ress 17292 df-plusg 17324 df-mulr 17325 df-starv 17326 df-sca 17327 df-vsca 17328 df-ip 17329 df-tset 17330 df-ple 17331 df-ds 17333 df-unif 17334 df-hom 17335 df-cco 17336 df-rest 17476 df-topn 17477 df-0g 17495 df-gsum 17496 df-topgen 17497 df-pt 17498 df-prds 17501 df-xrs 17557 df-qtop 17562 df-imas 17563 df-xps 17565 df-mre 17639 df-mrc 17640 df-acs 17642 df-mgm 18699 df-sgrp 18778 df-mnd 18794 df-submnd 18843 df-mulg 19135 df-cntz 19388 df-cmn 19853 df-psmet 21495 df-xmet 21496 df-met 21497 df-bl 21498 df-mopn 21499 df-fbas 21500 df-fg 21501 df-cnfld 21504 df-top 23032 df-topon 23049 df-topsp 23071 df-bases 23084 df-cld 23157 df-ntr 23158 df-cls 23159 df-nei 23236 df-lp 23274 df-perf 23275 df-cn 23365 df-cnp 23366 df-haus 23453 df-cmp 23525 df-tx 23700 df-hmeo 23893 df-fil 23984 df-fm 24076 df-flim 24077 df-flf 24078 df-xms 24458 df-ms 24459 df-tms 24460 df-cncf 25018 df-limc 26006 df-dv 26007 df-log 26702 df-cxp 26703

This theorem is referenced by: areacirclem3 38342 areacirclem4 38343 areacirc 38345

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