lptioo2 - Mathbox for Glauco Siliprandi

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Theorem lptioo2 44337

Description: The upper bound of an open interval is a limit point of the interval. (Contributed by Glauco Siliprandi, 11-Dec-2019.)

**Hypotheses**
Ref	Expression
lptioo2.1	⊢ 𝐽 = (topGen‘ran (,))
lptioo2.2	⊢ (𝜑 → 𝐴 ∈ ℝ^*)
lptioo2.3	⊢ (𝜑 → 𝐵 ∈ ℝ)
lptioo2.4	⊢ (𝜑 → 𝐴 < 𝐵)

**Assertion**
Ref	Expression
lptioo2	⊢ (𝜑 → 𝐵 ∈ ((limPt‘𝐽)‘(𝐴(,)𝐵)))

Proof of Theorem lptioo2 Dummy variables 𝑎 𝑏 𝑥 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		difssd 4132	. . . . . . . 8 ⊢ (𝜑 → ((𝐴(,)𝐵) ∖ {𝐵}) ⊆ (𝐴(,)𝐵))
2		simpr 485	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → 𝑥 ∈ (𝐴(,)𝐵))
3		ubioo 13355	. . . . . . . . . . . 12 ⊢ ¬ 𝐵 ∈ (𝐴(,)𝐵)
4		eleq1 2821	. . . . . . . . . . . . 13 ⊢ (𝑥 = 𝐵 → (𝑥 ∈ (𝐴(,)𝐵) ↔ 𝐵 ∈ (𝐴(,)𝐵)))
5	4	biimpcd 248	. . . . . . . . . . . 12 ⊢ (𝑥 ∈ (𝐴(,)𝐵) → (𝑥 = 𝐵 → 𝐵 ∈ (𝐴(,)𝐵)))
6	3, 5	mtoi 198	. . . . . . . . . . 11 ⊢ (𝑥 ∈ (𝐴(,)𝐵) → ¬ 𝑥 = 𝐵)
7	6	adantl 482	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → ¬ 𝑥 = 𝐵)
8		velsn 4644	. . . . . . . . . 10 ⊢ (𝑥 ∈ {𝐵} ↔ 𝑥 = 𝐵)
9	7, 8	sylnibr 328	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → ¬ 𝑥 ∈ {𝐵})
10	2, 9	eldifd 3959	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → 𝑥 ∈ ((𝐴(,)𝐵) ∖ {𝐵}))
11	1, 10	eqelssd 4003	. . . . . . 7 ⊢ (𝜑 → ((𝐴(,)𝐵) ∖ {𝐵}) = (𝐴(,)𝐵))
12	11	ineq2d 4212	. . . . . 6 ⊢ (𝜑 → ((𝑎(,)𝑏) ∩ ((𝐴(,)𝐵) ∖ {𝐵})) = ((𝑎(,)𝑏) ∩ (𝐴(,)𝐵)))
13	12	ad2antrr 724	. . . . 5 ⊢ (((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^*)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) → ((𝑎(,)𝑏) ∩ ((𝐴(,)𝐵) ∖ {𝐵})) = ((𝑎(,)𝑏) ∩ (𝐴(,)𝐵)))
14		simplrl 775	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) → 𝑎 ∈ ℝ^)
15		simplrr 776	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) → 𝑏 ∈ ℝ^)
16		lptioo2.2	. . . . . . . 8 ⊢ (𝜑 → 𝐴 ∈ ℝ^*)
17	16	ad2antrr 724	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) → 𝐴 ∈ ℝ^)
18		elioo3g 13352	. . . . . . . . . . 11 ⊢ (𝐵 ∈ (𝑎(,)𝑏) ↔ ((𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^*) ∧ (𝑎 < 𝐵 ∧ 𝐵 < 𝑏)))
19	18	biimpi 215	. . . . . . . . . 10 ⊢ (𝐵 ∈ (𝑎(,)𝑏) → ((𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^*) ∧ (𝑎 < 𝐵 ∧ 𝐵 < 𝑏)))
20	19	simpld 495	. . . . . . . . 9 ⊢ (𝐵 ∈ (𝑎(,)𝑏) → (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^*))
21	20	simp3d 1144	. . . . . . . 8 ⊢ (𝐵 ∈ (𝑎(,)𝑏) → 𝐵 ∈ ℝ^*)
22	21	adantl 482	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) → 𝐵 ∈ ℝ^)
23		iooin 13357	. . . . . . 7 ⊢ (((𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^) ∧ (𝐴 ∈ ℝ^ ∧ 𝐵 ∈ ℝ^*)) → ((𝑎(,)𝑏) ∩ (𝐴(,)𝐵)) = (if(𝑎 ≤ 𝐴, 𝐴, 𝑎)(,)if(𝑏 ≤ 𝐵, 𝑏, 𝐵)))
24	14, 15, 17, 22, 23	syl22anc 837	. . . . . 6 ⊢ (((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^*)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) → ((𝑎(,)𝑏) ∩ (𝐴(,)𝐵)) = (if(𝑎 ≤ 𝐴, 𝐴, 𝑎)(,)if(𝑏 ≤ 𝐵, 𝑏, 𝐵)))
25		iftrue 4534	. . . . . . . . . . 11 ⊢ (𝑎 ≤ 𝐴 → if(𝑎 ≤ 𝐴, 𝐴, 𝑎) = 𝐴)
26	25	adantl 482	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^*)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) ∧ 𝑎 ≤ 𝐴) → if(𝑎 ≤ 𝐴, 𝐴, 𝑎) = 𝐴)
27		lptioo2.4	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐴 < 𝐵)
28	27	ad3antrrr 728	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^*)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) ∧ 𝑎 ≤ 𝐴) → 𝐴 < 𝐵)
29	26, 28	eqbrtrd 5170	. . . . . . . . 9 ⊢ ((((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^*)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) ∧ 𝑎 ≤ 𝐴) → if(𝑎 ≤ 𝐴, 𝐴, 𝑎) < 𝐵)
30		iffalse 4537	. . . . . . . . . . 11 ⊢ (¬ 𝑎 ≤ 𝐴 → if(𝑎 ≤ 𝐴, 𝐴, 𝑎) = 𝑎)
31	30	adantl 482	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^*)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) ∧ ¬ 𝑎 ≤ 𝐴) → if(𝑎 ≤ 𝐴, 𝐴, 𝑎) = 𝑎)
32	19	simprd 496	. . . . . . . . . . . 12 ⊢ (𝐵 ∈ (𝑎(,)𝑏) → (𝑎 < 𝐵 ∧ 𝐵 < 𝑏))
33	32	simpld 495	. . . . . . . . . . 11 ⊢ (𝐵 ∈ (𝑎(,)𝑏) → 𝑎 < 𝐵)
34	33	ad2antlr 725	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^*)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) ∧ ¬ 𝑎 ≤ 𝐴) → 𝑎 < 𝐵)
35	31, 34	eqbrtrd 5170	. . . . . . . . 9 ⊢ ((((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^*)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) ∧ ¬ 𝑎 ≤ 𝐴) → if(𝑎 ≤ 𝐴, 𝐴, 𝑎) < 𝐵)
36	29, 35	pm2.61dan 811	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^*)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) → if(𝑎 ≤ 𝐴, 𝐴, 𝑎) < 𝐵)
37	32	simprd 496	. . . . . . . . . . . 12 ⊢ (𝐵 ∈ (𝑎(,)𝑏) → 𝐵 < 𝑏)
38	20	simp2d 1143	. . . . . . . . . . . . 13 ⊢ (𝐵 ∈ (𝑎(,)𝑏) → 𝑏 ∈ ℝ^*)
39		xrltnle 11280	. . . . . . . . . . . . 13 ⊢ ((𝐵 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^*) → (𝐵 < 𝑏 ↔ ¬ 𝑏 ≤ 𝐵))
40	21, 38, 39	syl2anc 584	. . . . . . . . . . . 12 ⊢ (𝐵 ∈ (𝑎(,)𝑏) → (𝐵 < 𝑏 ↔ ¬ 𝑏 ≤ 𝐵))
41	37, 40	mpbid 231	. . . . . . . . . . 11 ⊢ (𝐵 ∈ (𝑎(,)𝑏) → ¬ 𝑏 ≤ 𝐵)
42		iffalse 4537	. . . . . . . . . . 11 ⊢ (¬ 𝑏 ≤ 𝐵 → if(𝑏 ≤ 𝐵, 𝑏, 𝐵) = 𝐵)
43	41, 42	syl 17	. . . . . . . . . 10 ⊢ (𝐵 ∈ (𝑎(,)𝑏) → if(𝑏 ≤ 𝐵, 𝑏, 𝐵) = 𝐵)
44	43	eqcomd 2738	. . . . . . . . 9 ⊢ (𝐵 ∈ (𝑎(,)𝑏) → 𝐵 = if(𝑏 ≤ 𝐵, 𝑏, 𝐵))
45	44	adantl 482	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^*)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) → 𝐵 = if(𝑏 ≤ 𝐵, 𝑏, 𝐵))
46	36, 45	breqtrd 5174	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^*)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) → if(𝑎 ≤ 𝐴, 𝐴, 𝑎) < if(𝑏 ≤ 𝐵, 𝑏, 𝐵))
47	17, 14	ifcld 4574	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) → if(𝑎 ≤ 𝐴, 𝐴, 𝑎) ∈ ℝ^)
48	45, 22	eqeltrrd 2834	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) → if(𝑏 ≤ 𝐵, 𝑏, 𝐵) ∈ ℝ^)
49		ioon0 13349	. . . . . . . 8 ⊢ ((if(𝑎 ≤ 𝐴, 𝐴, 𝑎) ∈ ℝ^* ∧ if(𝑏 ≤ 𝐵, 𝑏, 𝐵) ∈ ℝ^*) → ((if(𝑎 ≤ 𝐴, 𝐴, 𝑎)(,)if(𝑏 ≤ 𝐵, 𝑏, 𝐵)) ≠ ∅ ↔ if(𝑎 ≤ 𝐴, 𝐴, 𝑎) < if(𝑏 ≤ 𝐵, 𝑏, 𝐵)))
50	47, 48, 49	syl2anc 584	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^*)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) → ((if(𝑎 ≤ 𝐴, 𝐴, 𝑎)(,)if(𝑏 ≤ 𝐵, 𝑏, 𝐵)) ≠ ∅ ↔ if(𝑎 ≤ 𝐴, 𝐴, 𝑎) < if(𝑏 ≤ 𝐵, 𝑏, 𝐵)))
51	46, 50	mpbird 256	. . . . . 6 ⊢ (((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^*)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) → (if(𝑎 ≤ 𝐴, 𝐴, 𝑎)(,)if(𝑏 ≤ 𝐵, 𝑏, 𝐵)) ≠ ∅)
52	24, 51	eqnetrd 3008	. . . . 5 ⊢ (((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^*)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) → ((𝑎(,)𝑏) ∩ (𝐴(,)𝐵)) ≠ ∅)
53	13, 52	eqnetrd 3008	. . . 4 ⊢ (((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^*)) ∧ 𝐵 ∈ (𝑎(,)𝑏)) → ((𝑎(,)𝑏) ∩ ((𝐴(,)𝐵) ∖ {𝐵})) ≠ ∅)
54	53	ex 413	. . 3 ⊢ ((𝜑 ∧ (𝑎 ∈ ℝ^* ∧ 𝑏 ∈ ℝ^*)) → (𝐵 ∈ (𝑎(,)𝑏) → ((𝑎(,)𝑏) ∩ ((𝐴(,)𝐵) ∖ {𝐵})) ≠ ∅))
55	54	ralrimivva 3200	. 2 ⊢ (𝜑 → ∀𝑎 ∈ ℝ^* ∀𝑏 ∈ ℝ^* (𝐵 ∈ (𝑎(,)𝑏) → ((𝑎(,)𝑏) ∩ ((𝐴(,)𝐵) ∖ {𝐵})) ≠ ∅))
56		lptioo2.1	. . 3 ⊢ 𝐽 = (topGen‘ran (,))
57		ioossre 13384	. . . 4 ⊢ (𝐴(,)𝐵) ⊆ ℝ
58	57	a1i 11	. . 3 ⊢ (𝜑 → (𝐴(,)𝐵) ⊆ ℝ)
59		lptioo2.3	. . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ)
60	56, 58, 59	islptre 44325	. 2 ⊢ (𝜑 → (𝐵 ∈ ((limPt‘𝐽)‘(𝐴(,)𝐵)) ↔ ∀𝑎 ∈ ℝ^* ∀𝑏 ∈ ℝ^* (𝐵 ∈ (𝑎(,)𝑏) → ((𝑎(,)𝑏) ∩ ((𝐴(,)𝐵) ∖ {𝐵})) ≠ ∅)))
61	55, 60	mpbird 256	1 ⊢ (𝜑 → 𝐵 ∈ ((limPt‘𝐽)‘(𝐴(,)𝐵)))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 396 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ≠ wne 2940 ∀wral 3061 ∖ cdif 3945 ∩ cin 3947 ⊆ wss 3948 ∅c0 4322 ifcif 4528 {csn 4628 class class class wbr 5148 ran crn 5677 ‘cfv 6543 (class class class)co 7408 ℝcr 11108 ℝ^*cxr 11246 < clt 11247 ≤ cle 11248 (,)cioo 13323 topGenctg 17382 limPtclp 22637

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 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7724 ax-cnex 11165 ax-resscn 11166 ax-1cn 11167 ax-icn 11168 ax-addcl 11169 ax-addrcl 11170 ax-mulcl 11171 ax-mulrcl 11172 ax-mulcom 11173 ax-addass 11174 ax-mulass 11175 ax-distr 11176 ax-i2m1 11177 ax-1ne0 11178 ax-1rid 11179 ax-rnegex 11180 ax-rrecex 11181 ax-cnre 11182 ax-pre-lttri 11183 ax-pre-lttrn 11184 ax-pre-ltadd 11185 ax-pre-mulgt0 11186 ax-pre-sup 11187

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 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-iin 5000 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7364 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7855 df-1st 7974 df-2nd 7975 df-frecs 8265 df-wrecs 8296 df-recs 8370 df-rdg 8409 df-er 8702 df-en 8939 df-dom 8940 df-sdom 8941 df-sup 9436 df-inf 9437 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-n0 12472 df-z 12558 df-uz 12822 df-q 12932 df-ioo 13327 df-topgen 17388 df-top 22395 df-topon 22412 df-bases 22448 df-cld 22522 df-ntr 22523 df-cls 22524 df-nei 22601 df-lp 22639

This theorem is referenced by: lptioo2cn 44351 fouriersw 44937

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