i0oii - Mathbox for Zhi Wang

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Theorem i0oii 47552

Description: (0[,)𝐴) is open in II. (Contributed by Zhi Wang, 9-Sep-2024.)

**Assertion**
Ref	Expression
i0oii	⊢ (𝐴 ≤ 1 → (0[,)𝐴) ∈ II)

Proof of Theorem i0oii Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		anandi3r 1104	. . . . . . . . . 10 ⊢ ((𝑥 ∈ ℝ ∧ 𝐴 ≤ 1 ∧ 𝑥 < 𝐴) ↔ ((𝑥 ∈ ℝ ∧ 𝐴 ≤ 1) ∧ (𝑥 < 𝐴 ∧ 𝐴 ≤ 1)))
2		rexr 11260	. . . . . . . . . . . 12 ⊢ (𝑥 ∈ ℝ → 𝑥 ∈ ℝ^*)
3		lerelxr 11277	. . . . . . . . . . . . . 14 ⊢ ≤ ⊆ (ℝ^* × ℝ^*)
4	3	brel 5742	. . . . . . . . . . . . 13 ⊢ (𝐴 ≤ 1 → (𝐴 ∈ ℝ^* ∧ 1 ∈ ℝ^*))
5	4	simpld 496	. . . . . . . . . . . 12 ⊢ (𝐴 ≤ 1 → 𝐴 ∈ ℝ^*)
6		1xr 11273	. . . . . . . . . . . . 13 ⊢ 1 ∈ ℝ^*
7		xrltletr 13136	. . . . . . . . . . . . . 14 ⊢ ((𝑥 ∈ ℝ^* ∧ 𝐴 ∈ ℝ^* ∧ 1 ∈ ℝ^*) → ((𝑥 < 𝐴 ∧ 𝐴 ≤ 1) → 𝑥 < 1))
8		xrltle 13128	. . . . . . . . . . . . . . 15 ⊢ ((𝑥 ∈ ℝ^* ∧ 1 ∈ ℝ^*) → (𝑥 < 1 → 𝑥 ≤ 1))
9	8	3adant2 1132	. . . . . . . . . . . . . 14 ⊢ ((𝑥 ∈ ℝ^* ∧ 𝐴 ∈ ℝ^* ∧ 1 ∈ ℝ^*) → (𝑥 < 1 → 𝑥 ≤ 1))
10	7, 9	syld 47	. . . . . . . . . . . . 13 ⊢ ((𝑥 ∈ ℝ^* ∧ 𝐴 ∈ ℝ^* ∧ 1 ∈ ℝ^*) → ((𝑥 < 𝐴 ∧ 𝐴 ≤ 1) → 𝑥 ≤ 1))
11	6, 10	mp3an3 1451	. . . . . . . . . . . 12 ⊢ ((𝑥 ∈ ℝ^* ∧ 𝐴 ∈ ℝ^*) → ((𝑥 < 𝐴 ∧ 𝐴 ≤ 1) → 𝑥 ≤ 1))
12	2, 5, 11	syl2an 597	. . . . . . . . . . 11 ⊢ ((𝑥 ∈ ℝ ∧ 𝐴 ≤ 1) → ((𝑥 < 𝐴 ∧ 𝐴 ≤ 1) → 𝑥 ≤ 1))
13	12	imp 408	. . . . . . . . . 10 ⊢ (((𝑥 ∈ ℝ ∧ 𝐴 ≤ 1) ∧ (𝑥 < 𝐴 ∧ 𝐴 ≤ 1)) → 𝑥 ≤ 1)
14	1, 13	sylbi 216	. . . . . . . . 9 ⊢ ((𝑥 ∈ ℝ ∧ 𝐴 ≤ 1 ∧ 𝑥 < 𝐴) → 𝑥 ≤ 1)
15	14	3com12 1124	. . . . . . . 8 ⊢ ((𝐴 ≤ 1 ∧ 𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) → 𝑥 ≤ 1)
16	15	3expib 1123	. . . . . . 7 ⊢ (𝐴 ≤ 1 → ((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) → 𝑥 ≤ 1))
17	16	pm4.71d 563	. . . . . 6 ⊢ (𝐴 ≤ 1 → ((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ↔ ((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ 𝑥 ≤ 1)))
18	17	anbi1d 631	. . . . 5 ⊢ (𝐴 ≤ 1 → (((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ 0 ≤ 𝑥) ↔ (((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ 𝑥 ≤ 1) ∧ 0 ≤ 𝑥)))
19		3anan32 1098	. . . . 5 ⊢ ((𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 < 𝐴) ↔ ((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ 0 ≤ 𝑥))
20		3anass 1096	. . . . . . 7 ⊢ ((𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1) ↔ (𝑥 ∈ ℝ ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1)))
21	20	anbi2i 624	. . . . . 6 ⊢ (((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1)) ↔ ((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ (𝑥 ∈ ℝ ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1))))
22		anandi 675	. . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ (𝑥 < 𝐴 ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1))) ↔ ((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ (𝑥 ∈ ℝ ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1))))
23		3anass 1096	. . . . . . 7 ⊢ (((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1) ↔ ((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1)))
24		3anan32 1098	. . . . . . 7 ⊢ (((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1) ↔ (((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ 𝑥 ≤ 1) ∧ 0 ≤ 𝑥))
25		anass 470	. . . . . . 7 ⊢ (((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1)) ↔ (𝑥 ∈ ℝ ∧ (𝑥 < 𝐴 ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1))))
26	23, 24, 25	3bitr3ri 302	. . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ (𝑥 < 𝐴 ∧ (0 ≤ 𝑥 ∧ 𝑥 ≤ 1))) ↔ (((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ 𝑥 ≤ 1) ∧ 0 ≤ 𝑥))
27	21, 22, 26	3bitr2i 299	. . . . 5 ⊢ (((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1)) ↔ (((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ 𝑥 ≤ 1) ∧ 0 ≤ 𝑥))
28	18, 19, 27	3bitr4g 314	. . . 4 ⊢ (𝐴 ≤ 1 → ((𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 < 𝐴) ↔ ((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1))))
29		0re 11216	. . . . 5 ⊢ 0 ∈ ℝ
30		elico2 13388	. . . . 5 ⊢ ((0 ∈ ℝ ∧ 𝐴 ∈ ℝ^*) → (𝑥 ∈ (0[,)𝐴) ↔ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 < 𝐴)))
31	29, 5, 30	sylancr 588	. . . 4 ⊢ (𝐴 ≤ 1 → (𝑥 ∈ (0[,)𝐴) ↔ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 < 𝐴)))
32		elin 3965	. . . . . 6 ⊢ (𝑥 ∈ ((-∞(,)𝐴) ∩ (0[,]1)) ↔ (𝑥 ∈ (-∞(,)𝐴) ∧ 𝑥 ∈ (0[,]1)))
33		elicc01 13443	. . . . . . 7 ⊢ (𝑥 ∈ (0[,]1) ↔ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1))
34	33	anbi2i 624	. . . . . 6 ⊢ ((𝑥 ∈ (-∞(,)𝐴) ∧ 𝑥 ∈ (0[,]1)) ↔ (𝑥 ∈ (-∞(,)𝐴) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1)))
35	32, 34	bitri 275	. . . . 5 ⊢ (𝑥 ∈ ((-∞(,)𝐴) ∩ (0[,]1)) ↔ (𝑥 ∈ (-∞(,)𝐴) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1)))
36		elioomnf 13421	. . . . . . 7 ⊢ (𝐴 ∈ ℝ^* → (𝑥 ∈ (-∞(,)𝐴) ↔ (𝑥 ∈ ℝ ∧ 𝑥 < 𝐴)))
37	5, 36	syl 17	. . . . . 6 ⊢ (𝐴 ≤ 1 → (𝑥 ∈ (-∞(,)𝐴) ↔ (𝑥 ∈ ℝ ∧ 𝑥 < 𝐴)))
38	37	anbi1d 631	. . . . 5 ⊢ (𝐴 ≤ 1 → ((𝑥 ∈ (-∞(,)𝐴) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1)) ↔ ((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1))))
39	35, 38	bitrid 283	. . . 4 ⊢ (𝐴 ≤ 1 → (𝑥 ∈ ((-∞(,)𝐴) ∩ (0[,]1)) ↔ ((𝑥 ∈ ℝ ∧ 𝑥 < 𝐴) ∧ (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥 ∧ 𝑥 ≤ 1))))
40	28, 31, 39	3bitr4rd 312	. . 3 ⊢ (𝐴 ≤ 1 → (𝑥 ∈ ((-∞(,)𝐴) ∩ (0[,]1)) ↔ 𝑥 ∈ (0[,)𝐴)))
41	40	eqrdv 2731	. 2 ⊢ (𝐴 ≤ 1 → ((-∞(,)𝐴) ∩ (0[,]1)) = (0[,)𝐴))
42		fvex 6905	. . . 4 ⊢ (topGen‘ran (,)) ∈ V
43		ovex 7442	. . . 4 ⊢ (0[,]1) ∈ V
44		iooretop 24282	. . . 4 ⊢ (-∞(,)𝐴) ∈ (topGen‘ran (,))
45		elrestr 17374	. . . 4 ⊢ (((topGen‘ran (,)) ∈ V ∧ (0[,]1) ∈ V ∧ (-∞(,)𝐴) ∈ (topGen‘ran (,))) → ((-∞(,)𝐴) ∩ (0[,]1)) ∈ ((topGen‘ran (,)) ↾_t (0[,]1)))
46	42, 43, 44, 45	mp3an 1462	. . 3 ⊢ ((-∞(,)𝐴) ∩ (0[,]1)) ∈ ((topGen‘ran (,)) ↾_t (0[,]1))
47		dfii2 24398	. . 3 ⊢ II = ((topGen‘ran (,)) ↾_t (0[,]1))
48	46, 47	eleqtrri 2833	. 2 ⊢ ((-∞(,)𝐴) ∩ (0[,]1)) ∈ II
49	41, 48	eqeltrrdi 2843	1 ⊢ (𝐴 ≤ 1 → (0[,)𝐴) ∈ II)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 ∧ w3a 1088 ∈ wcel 2107 Vcvv 3475 ∩ cin 3948 class class class wbr 5149 ran crn 5678 ‘cfv 6544 (class class class)co 7409 ℝcr 11109 0cc0 11110 1c1 11111 -∞cmnf 11246 ℝ^*cxr 11247 < clt 11248 ≤ cle 11249 (,)cioo 13324 [,)cico 13326 [,]cicc 13327 ↾_t crest 17366 topGenctg 17383 IIcii 24391

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 ax-pre-sup 11188

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7856 df-1st 7975 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-er 8703 df-map 8822 df-en 8940 df-dom 8941 df-sdom 8942 df-sup 9437 df-inf 9438 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-div 11872 df-nn 12213 df-2 12275 df-3 12276 df-n0 12473 df-z 12559 df-uz 12823 df-q 12933 df-rp 12975 df-xneg 13092 df-xadd 13093 df-xmul 13094 df-ioo 13328 df-ico 13330 df-icc 13331 df-seq 13967 df-exp 14028 df-cj 15046 df-re 15047 df-im 15048 df-sqrt 15182 df-abs 15183 df-rest 17368 df-topgen 17389 df-psmet 20936 df-xmet 20937 df-met 20938 df-bl 20939 df-mopn 20940 df-top 22396 df-topon 22413 df-bases 22449 df-ii 24393

This theorem is referenced by: sepfsepc 47560

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