io1ii - Mathbox for Zhi Wang

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Theorem io1ii 47939

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 11292	. . . . . . . . . . 11 ⊢ 0 ∈ ℝ^*
2		lerelxr 11308	. . . . . . . . . . . . 13 ⊢ ≤ ⊆ (ℝ^* × ℝ^*)
3	2	brel 5743	. . . . . . . . . . . 12 ⊢ (0 ≤ 𝐴 → (0 ∈ ℝ^* ∧ 𝐴 ∈ ℝ^*))
4	3	simprd 495	. . . . . . . . . . 11 ⊢ (0 ≤ 𝐴 → 𝐴 ∈ ℝ^*)
5		rexr 11291	. . . . . . . . . . 11 ⊢ (𝑥 ∈ ℝ → 𝑥 ∈ ℝ^*)
6		xrlelttr 13168	. . . . . . . . . . . 12 ⊢ ((0 ∈ ℝ^* ∧ 𝐴 ∈ ℝ^* ∧ 𝑥 ∈ ℝ^*) → ((0 ≤ 𝐴 ∧ 𝐴 < 𝑥) → 0 < 𝑥))
7		xrltle 13161	. . . . . . . . . . . . 13 ⊢ ((0 ∈ ℝ^* ∧ 𝑥 ∈ ℝ^*) → (0 < 𝑥 → 0 ≤ 𝑥))
8	7	3adant2 1129	. . . . . . . . . . . 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 1464	. . . . . . . . . 10 ⊢ ((0 ≤ 𝐴 ∧ 𝑥 ∈ ℝ) → ((0 ≤ 𝐴 ∧ 𝐴 < 𝑥) → 0 ≤ 𝑥))
11	10	imp 406	. . . . . . . . 9 ⊢ (((0 ≤ 𝐴 ∧ 𝑥 ∈ ℝ) ∧ (0 ≤ 𝐴 ∧ 𝐴 < 𝑥)) → 0 ≤ 𝑥)
12	11	3impdi 1348	. . . . . . . 8 ⊢ ((0 ≤ 𝐴 ∧ 𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) → 0 ≤ 𝑥)
13	12	3expib 1120	. . . . . . 7 ⊢ (0 ≤ 𝐴 → ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) → 0 ≤ 𝑥))
14	13	pm4.71d 561	. . . . . 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 1087	. . . . 5 ⊢ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥 ∧ 𝑥 ≤ 1) ↔ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ 𝑥 ≤ 1))
17		3anass 1093	. . . . . . 7 ⊢ ((𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1) ↔ (𝑥 ∈ ℝ ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1)))
18	17	anbi2i 622	. . . . . 6 ⊢ (((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1)) ↔ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ (𝑥 ∈ ℝ ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1))))
19		anandi 675	. . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ (𝐴 < 𝑥 ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1))) ↔ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ (𝑥 ∈ ℝ ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1))))
20		anass 468	. . . . . . 7 ⊢ ((((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ 0 ≤ 𝑥) ∧ 𝑥 ≤ 1) ↔ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1)))
21		anass 468	. . . . . . 7 ⊢ (((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1)) ↔ (𝑥 ∈ ℝ ∧ (𝐴 < 𝑥 ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1))))
22	20, 21	bitr2i 276	. . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ (𝐴 < 𝑥 ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1))) ↔ (((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ 0 ≤ 𝑥) ∧ 𝑥 ≤ 1))
23	18, 19, 22	3bitr2i 299	. . . . 5 ⊢ (((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1)) ↔ (((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ 0 ≤ 𝑥) ∧ 𝑥 ≤ 1))
24	15, 16, 23	3bitr4g 314	. . . 4 ⊢ (0 ≤ 𝐴 → ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥 ∧ 𝑥 ≤ 1) ↔ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1))))
25		1re 11245	. . . . 5 ⊢ 1 ∈ ℝ
26		elioc2 13420	. . . . 5 ⊢ ((𝐴 ∈ ℝ^* ∧ 1 ∈ ℝ) → (𝑥 ∈ (𝐴(,]1) ↔ (𝑥 ∈ ℝ ∧ 𝐴 < 𝑥 ∧ 𝑥 ≤ 1)))
27	4, 25, 26	sylancl 585	. . . 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 13476	. . . . . . 7 ⊢ (𝑥 ∈ (0[,]1) ↔ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1))
30	29	anbi2i 622	. . . . . 6 ⊢ ((𝑥 ∈ (𝐴(,)+∞) ∧ 𝑥 ∈ (0[,]1)) ↔ (𝑥 ∈ (𝐴(,)+∞) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1)))
31	28, 30	bitri 275	. . . . 5 ⊢ (𝑥 ∈ ((𝐴(,)+∞) ∩ (0[,]1)) ↔ (𝑥 ∈ (𝐴(,)+∞) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1)))
32		elioopnf 13453	. . . . . . 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 283	. . . 4 ⊢ (0 ≤ 𝐴 → (𝑥 ∈ ((𝐴(,)+∞) ∩ (0[,]1)) ↔ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1))))
36	24, 27, 35	3bitr4rd 312	. . 3 ⊢ (0 ≤ 𝐴 → (𝑥 ∈ ((𝐴(,)+∞) ∩ (0[,]1)) ↔ 𝑥 ∈ (𝐴(,]1)))
37	36	eqrdv 2726	. 2 ⊢ (0 ≤ 𝐴 → ((𝐴(,)+∞) ∩ (0[,]1)) = (𝐴(,]1))
38		fvex 6910	. . . 4 ⊢ (topGen‘ran (,)) ∈ V
39		ovex 7453	. . . 4 ⊢ (0[,]1) ∈ V
40		iooretop 24695	. . . 4 ⊢ (𝐴(,)+∞) ∈ (topGen‘ran (,))
41		elrestr 17410	. . . 4 ⊢ (((topGen‘ran (,)) ∈ V ∧ (0[,]1) ∈ V ∧ (𝐴(,)+∞) ∈ (topGen‘ran (,))) → ((𝐴(,)+∞) ∩ (0[,]1)) ∈ ((topGen‘ran (,)) ↾_t (0[,]1)))
42	38, 39, 40, 41	mp3an 1458	. . 3 ⊢ ((𝐴(,)+∞) ∩ (0[,]1)) ∈ ((topGen‘ran (,)) ↾_t (0[,]1))
43		dfii2 24815	. . 3 ⊢ II = ((topGen‘ran (,)) ↾_t (0[,]1))
44	42, 43	eleqtrri 2828	. 2 ⊢ ((𝐴(,)+∞) ∩ (0[,]1)) ∈ II
45	37, 44	eqeltrrdi 2838	1 ⊢ (0 ≤ 𝐴 → (𝐴(,]1) ∈ II)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1085 ∈ wcel 2099 Vcvv 3471 ∩ cin 3946 class class class wbr 5148 ran crn 5679 ‘cfv 6548 (class class class)co 7420 ℝcr 11138 0cc0 11139 1c1 11140 +∞cpnf 11276 ℝ^*cxr 11278 < clt 11279 ≤ cle 11280 (,)cioo 13357 (,]cioc 13358 [,]cicc 13360 ↾_t crest 17402 topGenctg 17419 IIcii 24808

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-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5365 ax-pr 5429 ax-un 7740 ax-cnex 11195 ax-resscn 11196 ax-1cn 11197 ax-icn 11198 ax-addcl 11199 ax-addrcl 11200 ax-mulcl 11201 ax-mulrcl 11202 ax-mulcom 11203 ax-addass 11204 ax-mulass 11205 ax-distr 11206 ax-i2m1 11207 ax-1ne0 11208 ax-1rid 11209 ax-rnegex 11210 ax-rrecex 11211 ax-cnre 11212 ax-pre-lttri 11213 ax-pre-lttrn 11214 ax-pre-ltadd 11215 ax-pre-mulgt0 11216 ax-pre-sup 11217

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 2938 df-nel 3044 df-ral 3059 df-rex 3068 df-rmo 3373 df-reu 3374 df-rab 3430 df-v 3473 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4909 df-iun 4998 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5576 df-eprel 5582 df-po 5590 df-so 5591 df-fr 5633 df-we 5635 df-xp 5684 df-rel 5685 df-cnv 5686 df-co 5687 df-dm 5688 df-rn 5689 df-res 5690 df-ima 5691 df-pred 6305 df-ord 6372 df-on 6373 df-lim 6374 df-suc 6375 df-iota 6500 df-fun 6550 df-fn 6551 df-f 6552 df-f1 6553 df-fo 6554 df-f1o 6555 df-fv 6556 df-riota 7376 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7871 df-1st 7993 df-2nd 7994 df-frecs 8287 df-wrecs 8318 df-recs 8392 df-rdg 8431 df-er 8725 df-map 8847 df-en 8965 df-dom 8966 df-sdom 8967 df-sup 9466 df-inf 9467 df-pnf 11281 df-mnf 11282 df-xr 11283 df-ltxr 11284 df-le 11285 df-sub 11477 df-neg 11478 df-div 11903 df-nn 12244 df-2 12306 df-3 12307 df-n0 12504 df-z 12590 df-uz 12854 df-q 12964 df-rp 13008 df-xneg 13125 df-xadd 13126 df-xmul 13127 df-ioo 13361 df-ioc 13362 df-icc 13364 df-seq 14000 df-exp 14060 df-cj 15079 df-re 15080 df-im 15081 df-sqrt 15215 df-abs 15216 df-rest 17404 df-topgen 17425 df-psmet 21271 df-xmet 21272 df-met 21273 df-bl 21274 df-mopn 21275 df-top 22809 df-topon 22826 df-bases 22862 df-ii 24810

This theorem is referenced by: sepfsepc 47946

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