io1ii - Mathbox for Zhi Wang

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Theorem io1ii 47506

Description: (𝐴(,]1) is open in II. (Contributed by Zhi Wang, 9-Sep-2024.)

**Assertion**
Ref	Expression
io1ii	⊢ (0 ≤ 𝐴 → (𝐴(,]1) ∈ II)

Proof of Theorem io1ii Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		0xr 11257	. . . . . . . . . . 11 ⊢ 0 ∈ ℝ^*
2		lerelxr 11273	. . . . . . . . . . . . 13 ⊢ ≤ ⊆ (ℝ^* × ℝ^*)
3	2	brel 5739	. . . . . . . . . . . 12 ⊢ (0 ≤ 𝐴 → (0 ∈ ℝ^* ∧ 𝐴 ∈ ℝ^*))
4	3	simprd 496	. . . . . . . . . . 11 ⊢ (0 ≤ 𝐴 → 𝐴 ∈ ℝ^*)
5		rexr 11256	. . . . . . . . . . 11 ⊢ (𝑥 ∈ ℝ → 𝑥 ∈ ℝ^*)
6		xrlelttr 13131	. . . . . . . . . . . 12 ⊢ ((0 ∈ ℝ^* ∧ 𝐴 ∈ ℝ^* ∧ 𝑥 ∈ ℝ^*) → ((0 ≤ 𝐴 ∧ 𝐴 < 𝑥) → 0 < 𝑥))
7		xrltle 13124	. . . . . . . . . . . . 13 ⊢ ((0 ∈ ℝ^* ∧ 𝑥 ∈ ℝ^*) → (0 < 𝑥 → 0 ≤ 𝑥))
8	7	3adant2 1131	. . . . . . . . . . . 12 ⊢ ((0 ∈ ℝ^* ∧ 𝐴 ∈ ℝ^* ∧ 𝑥 ∈ ℝ^*) → (0 < 𝑥 → 0 ≤ 𝑥))
9	6, 8	syld 47	. . . . . . . . . . 11 ⊢ ((0 ∈ ℝ^* ∧ 𝐴 ∈ ℝ^* ∧ 𝑥 ∈ ℝ^*) → ((0 ≤ 𝐴 ∧ 𝐴 < 𝑥) → 0 ≤ 𝑥))
10	1, 4, 5, 9	mp3an3an 1467	. . . . . . . . . 10 ⊢ ((0 ≤ 𝐴 ∧ 𝑥 ∈ ℝ) → ((0 ≤ 𝐴 ∧ 𝐴 < 𝑥) → 0 ≤ 𝑥))
11	10	imp 407	. . . . . . . . 9 ⊢ (((0 ≤ 𝐴 ∧ 𝑥 ∈ ℝ) ∧ (0 ≤ 𝐴 ∧ 𝐴 < 𝑥)) → 0 ≤ 𝑥)
12	11	3impdi 1350	. . . . . . . 8 ⊢ ((0 ≤ 𝐴 ∧ 𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) → 0 ≤ 𝑥)
13	12	3expib 1122	. . . . . . 7 ⊢ (0 ≤ 𝐴 → ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) → 0 ≤ 𝑥))
14	13	pm4.71d 562	. . . . . 6 ⊢ (0 ≤ 𝐴 → ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ↔ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ 0 ≤ 𝑥)))
15	14	anbi1d 630	. . . . 5 ⊢ (0 ≤ 𝐴 → (((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ 𝑥 ≤ 1) ↔ (((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ 0 ≤ 𝑥) ∧ 𝑥 ≤ 1)))
16		df-3an 1089	. . . . 5 ⊢ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥 ∧ 𝑥 ≤ 1) ↔ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ 𝑥 ≤ 1))
17		3anass 1095	. . . . . . 7 ⊢ ((𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1) ↔ (𝑥 ∈ ℝ ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1)))
18	17	anbi2i 623	. . . . . 6 ⊢ (((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1)) ↔ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ (𝑥 ∈ ℝ ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1))))
19		anandi 674	. . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ (𝐴 < 𝑥 ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1))) ↔ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ (𝑥 ∈ ℝ ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1))))
20		anass 469	. . . . . . 7 ⊢ ((((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ 0 ≤ 𝑥) ∧ 𝑥 ≤ 1) ↔ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1)))
21		anass 469	. . . . . . 7 ⊢ (((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1)) ↔ (𝑥 ∈ ℝ ∧ (𝐴 < 𝑥 ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1))))
22	20, 21	bitr2i 275	. . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ (𝐴 < 𝑥 ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1))) ↔ (((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ 0 ≤ 𝑥) ∧ 𝑥 ≤ 1))
23	18, 19, 22	3bitr2i 298	. . . . 5 ⊢ (((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1)) ↔ (((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ 0 ≤ 𝑥) ∧ 𝑥 ≤ 1))
24	15, 16, 23	3bitr4g 313	. . . 4 ⊢ (0 ≤ 𝐴 → ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥 ∧ 𝑥 ≤ 1) ↔ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1))))
25		1re 11210	. . . . 5 ⊢ 1 ∈ ℝ
26		elioc2 13383	. . . . 5 ⊢ ((𝐴 ∈ ℝ^* ∧ 1 ∈ ℝ) → (𝑥 ∈ (𝐴(,]1) ↔ (𝑥 ∈ ℝ ∧ 𝐴 < 𝑥 ∧ 𝑥 ≤ 1)))
27	4, 25, 26	sylancl 586	. . . 4 ⊢ (0 ≤ 𝐴 → (𝑥 ∈ (𝐴(,]1) ↔ (𝑥 ∈ ℝ ∧ 𝐴 < 𝑥 ∧ 𝑥 ≤ 1)))
28		elin 3963	. . . . . 6 ⊢ (𝑥 ∈ ((𝐴(,)+∞) ∩ (0[,]1)) ↔ (𝑥 ∈ (𝐴(,)+∞) ∧ 𝑥 ∈ (0[,]1)))
29		elicc01 13439	. . . . . . 7 ⊢ (𝑥 ∈ (0[,]1) ↔ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1))
30	29	anbi2i 623	. . . . . 6 ⊢ ((𝑥 ∈ (𝐴(,)+∞) ∧ 𝑥 ∈ (0[,]1)) ↔ (𝑥 ∈ (𝐴(,)+∞) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1)))
31	28, 30	bitri 274	. . . . 5 ⊢ (𝑥 ∈ ((𝐴(,)+∞) ∩ (0[,]1)) ↔ (𝑥 ∈ (𝐴(,)+∞) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1)))
32		elioopnf 13416	. . . . . . 7 ⊢ (𝐴 ∈ ℝ^* → (𝑥 ∈ (𝐴(,)+∞) ↔ (𝑥 ∈ ℝ ∧ 𝐴 < 𝑥)))
33	4, 32	syl 17	. . . . . 6 ⊢ (0 ≤ 𝐴 → (𝑥 ∈ (𝐴(,)+∞) ↔ (𝑥 ∈ ℝ ∧ 𝐴 < 𝑥)))
34	33	anbi1d 630	. . . . 5 ⊢ (0 ≤ 𝐴 → ((𝑥 ∈ (𝐴(,)+∞) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1)) ↔ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1))))
35	31, 34	bitrid 282	. . . 4 ⊢ (0 ≤ 𝐴 → (𝑥 ∈ ((𝐴(,)+∞) ∩ (0[,]1)) ↔ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1))))
36	24, 27, 35	3bitr4rd 311	. . 3 ⊢ (0 ≤ 𝐴 → (𝑥 ∈ ((𝐴(,)+∞) ∩ (0[,]1)) ↔ 𝑥 ∈ (𝐴(,]1)))
37	36	eqrdv 2730	. 2 ⊢ (0 ≤ 𝐴 → ((𝐴(,)+∞) ∩ (0[,]1)) = (𝐴(,]1))
38		fvex 6901	. . . 4 ⊢ (topGen‘ran (,)) ∈ V
39		ovex 7438	. . . 4 ⊢ (0[,]1) ∈ V
40		iooretop 24273	. . . 4 ⊢ (𝐴(,)+∞) ∈ (topGen‘ran (,))
41		elrestr 17370	. . . 4 ⊢ (((topGen‘ran (,)) ∈ V ∧ (0[,]1) ∈ V ∧ (𝐴(,)+∞) ∈ (topGen‘ran (,))) → ((𝐴(,)+∞) ∩ (0[,]1)) ∈ ((topGen‘ran (,)) ↾_t (0[,]1)))
42	38, 39, 40, 41	mp3an 1461	. . 3 ⊢ ((𝐴(,)+∞) ∩ (0[,]1)) ∈ ((topGen‘ran (,)) ↾_t (0[,]1))
43		dfii2 24389	. . 3 ⊢ II = ((topGen‘ran (,)) ↾_t (0[,]1))
44	42, 43	eleqtrri 2832	. 2 ⊢ ((𝐴(,)+∞) ∩ (0[,]1)) ∈ II
45	37, 44	eqeltrrdi 2842	1 ⊢ (0 ≤ 𝐴 → (𝐴(,]1) ∈ II)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 ∧ w3a 1087 ∈ wcel 2106 Vcvv 3474 ∩ cin 3946 class class class wbr 5147 ran crn 5676 ‘cfv 6540 (class class class)co 7405 ℝcr 11105 0cc0 11106 1c1 11107 +∞cpnf 11241 ℝ^*cxr 11243 < clt 11244 ≤ cle 11245 (,)cioo 13320 (,]cioc 13321 [,]cicc 13323 ↾_t crest 17362 topGenctg 17379 IIcii 24382

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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 ax-pre-sup 11184

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7852 df-1st 7971 df-2nd 7972 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-er 8699 df-map 8818 df-en 8936 df-dom 8937 df-sdom 8938 df-sup 9433 df-inf 9434 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-div 11868 df-nn 12209 df-2 12271 df-3 12272 df-n0 12469 df-z 12555 df-uz 12819 df-q 12929 df-rp 12971 df-xneg 13088 df-xadd 13089 df-xmul 13090 df-ioo 13324 df-ioc 13325 df-icc 13327 df-seq 13963 df-exp 14024 df-cj 15042 df-re 15043 df-im 15044 df-sqrt 15178 df-abs 15179 df-rest 17364 df-topgen 17385 df-psmet 20928 df-xmet 20929 df-met 20930 df-bl 20931 df-mopn 20932 df-top 22387 df-topon 22404 df-bases 22440 df-ii 24384

This theorem is referenced by: sepfsepc 47513

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