io1ii - Mathbox for Zhi Wang

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Theorem io1ii 47801

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 11260	. . . . . . . . . . 11 ⊢ 0 ∈ ℝ^*
2		lerelxr 11276	. . . . . . . . . . . . 13 ⊢ ≤ ⊆ (ℝ^* × ℝ^*)
3	2	brel 5732	. . . . . . . . . . . 12 ⊢ (0 ≤ 𝐴 → (0 ∈ ℝ^* ∧ 𝐴 ∈ ℝ^*))
4	3	simprd 495	. . . . . . . . . . 11 ⊢ (0 ≤ 𝐴 → 𝐴 ∈ ℝ^*)
5		rexr 11259	. . . . . . . . . . 11 ⊢ (𝑥 ∈ ℝ → 𝑥 ∈ ℝ^*)
6		xrlelttr 13136	. . . . . . . . . . . 12 ⊢ ((0 ∈ ℝ^* ∧ 𝐴 ∈ ℝ^* ∧ 𝑥 ∈ ℝ^*) → ((0 ≤ 𝐴 ∧ 𝐴 < 𝑥) → 0 < 𝑥))
7		xrltle 13129	. . . . . . . . . . . . 13 ⊢ ((0 ∈ ℝ^* ∧ 𝑥 ∈ ℝ^*) → (0 < 𝑥 → 0 ≤ 𝑥))
8	7	3adant2 1128	. . . . . . . . . . . 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 1463	. . . . . . . . . 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 1347	. . . . . . . 8 ⊢ ((0 ≤ 𝐴 ∧ 𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) → 0 ≤ 𝑥)
13	12	3expib 1119	. . . . . . 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 629	. . . . 5 ⊢ (0 ≤ 𝐴 → (((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ 𝑥 ≤ 1) ↔ (((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ 0 ≤ 𝑥) ∧ 𝑥 ≤ 1)))
16		df-3an 1086	. . . . 5 ⊢ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥 ∧ 𝑥 ≤ 1) ↔ ((𝑥 ∈ ℝ ∧ 𝐴 < 𝑥) ∧ 𝑥 ≤ 1))
17		3anass 1092	. . . . . . 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 673	. . . . . 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 11213	. . . . 5 ⊢ 1 ∈ ℝ
26		elioc2 13388	. . . . 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 3957	. . . . . 6 ⊢ (𝑥 ∈ ((𝐴(,)+∞) ∩ (0[,]1)) ↔ (𝑥 ∈ (𝐴(,)+∞) ∧ 𝑥 ∈ (0[,]1)))
29		elicc01 13444	. . . . . . 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 13421	. . . . . . 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 629	. . . . 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 2722	. 2 ⊢ (0 ≤ 𝐴 → ((𝐴(,)+∞) ∩ (0[,]1)) = (𝐴(,]1))
38		fvex 6895	. . . 4 ⊢ (topGen‘ran (,)) ∈ V
39		ovex 7435	. . . 4 ⊢ (0[,]1) ∈ V
40		iooretop 24626	. . . 4 ⊢ (𝐴(,)+∞) ∈ (topGen‘ran (,))
41		elrestr 17379	. . . 4 ⊢ (((topGen‘ran (,)) ∈ V ∧ (0[,]1) ∈ V ∧ (𝐴(,)+∞) ∈ (topGen‘ran (,))) → ((𝐴(,)+∞) ∩ (0[,]1)) ∈ ((topGen‘ran (,)) ↾_t (0[,]1)))
42	38, 39, 40, 41	mp3an 1457	. . 3 ⊢ ((𝐴(,)+∞) ∩ (0[,]1)) ∈ ((topGen‘ran (,)) ↾_t (0[,]1))
43		dfii2 24746	. . 3 ⊢ II = ((topGen‘ran (,)) ↾_t (0[,]1))
44	42, 43	eleqtrri 2824	. 2 ⊢ ((𝐴(,)+∞) ∩ (0[,]1)) ∈ II
45	37, 44	eqeltrrdi 2834	1 ⊢ (0 ≤ 𝐴 → (𝐴(,]1) ∈ II)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1084 ∈ wcel 2098 Vcvv 3466 ∩ cin 3940 class class class wbr 5139 ran crn 5668 ‘cfv 6534 (class class class)co 7402 ℝcr 11106 0cc0 11107 1c1 11108 +∞cpnf 11244 ℝ^*cxr 11246 < clt 11247 ≤ cle 11248 (,)cioo 13325 (,]cioc 13326 [,]cicc 13328 ↾_t crest 17371 topGenctg 17388 IIcii 24739

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2695 ax-rep 5276 ax-sep 5290 ax-nul 5297 ax-pow 5354 ax-pr 5418 ax-un 7719 ax-cnex 11163 ax-resscn 11164 ax-1cn 11165 ax-icn 11166 ax-addcl 11167 ax-addrcl 11168 ax-mulcl 11169 ax-mulrcl 11170 ax-mulcom 11171 ax-addass 11172 ax-mulass 11173 ax-distr 11174 ax-i2m1 11175 ax-1ne0 11176 ax-1rid 11177 ax-rnegex 11178 ax-rrecex 11179 ax-cnre 11180 ax-pre-lttri 11181 ax-pre-lttrn 11182 ax-pre-ltadd 11183 ax-pre-mulgt0 11184 ax-pre-sup 11185

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2526 df-eu 2555 df-clab 2702 df-cleq 2716 df-clel 2802 df-nfc 2877 df-ne 2933 df-nel 3039 df-ral 3054 df-rex 3063 df-rmo 3368 df-reu 3369 df-rab 3425 df-v 3468 df-sbc 3771 df-csb 3887 df-dif 3944 df-un 3946 df-in 3948 df-ss 3958 df-pss 3960 df-nul 4316 df-if 4522 df-pw 4597 df-sn 4622 df-pr 4624 df-op 4628 df-uni 4901 df-iun 4990 df-br 5140 df-opab 5202 df-mpt 5223 df-tr 5257 df-id 5565 df-eprel 5571 df-po 5579 df-so 5580 df-fr 5622 df-we 5624 df-xp 5673 df-rel 5674 df-cnv 5675 df-co 5676 df-dm 5677 df-rn 5678 df-res 5679 df-ima 5680 df-pred 6291 df-ord 6358 df-on 6359 df-lim 6360 df-suc 6361 df-iota 6486 df-fun 6536 df-fn 6537 df-f 6538 df-f1 6539 df-fo 6540 df-f1o 6541 df-fv 6542 df-riota 7358 df-ov 7405 df-oprab 7406 df-mpo 7407 df-om 7850 df-1st 7969 df-2nd 7970 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-er 8700 df-map 8819 df-en 8937 df-dom 8938 df-sdom 8939 df-sup 9434 df-inf 9435 df-pnf 11249 df-mnf 11250 df-xr 11251 df-ltxr 11252 df-le 11253 df-sub 11445 df-neg 11446 df-div 11871 df-nn 12212 df-2 12274 df-3 12275 df-n0 12472 df-z 12558 df-uz 12822 df-q 12932 df-rp 12976 df-xneg 13093 df-xadd 13094 df-xmul 13095 df-ioo 13329 df-ioc 13330 df-icc 13332 df-seq 13968 df-exp 14029 df-cj 15048 df-re 15049 df-im 15050 df-sqrt 15184 df-abs 15185 df-rest 17373 df-topgen 17394 df-psmet 21226 df-xmet 21227 df-met 21228 df-bl 21229 df-mopn 21230 df-top 22740 df-topon 22757 df-bases 22793 df-ii 24741

This theorem is referenced by: sepfsepc 47808

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