iooabslt - Mathbox for Glauco Siliprandi

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Theorem iooabslt 44884

Description: An upper bound for the distance from the center of an open interval. (Contributed by Glauco Siliprandi, 11-Dec-2019.)

**Hypotheses**
Ref	Expression
iooabslt.1	⊢ (𝜑 → 𝐴 ∈ ℝ)
iooabslt.2	⊢ (𝜑 → 𝐵 ∈ ℝ)
iooabslt.3	⊢ (𝜑 → 𝐶 ∈ ((𝐴 − 𝐵)(,)(𝐴 + 𝐵)))

**Assertion**
Ref	Expression
iooabslt	⊢ (𝜑 → (abs‘(𝐴 − 𝐶)) < 𝐵)

**Proof of Theorem iooabslt**
Step	Hyp	Ref	Expression
1		iooabslt.1	. . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ)
2	1	recnd 11273	. . 3 ⊢ (𝜑 → 𝐴 ∈ ℂ)
3		iooabslt.3	. . . . 5 ⊢ (𝜑 → 𝐶 ∈ ((𝐴 − 𝐵)(,)(𝐴 + 𝐵)))
4		elioore 13387	. . . . 5 ⊢ (𝐶 ∈ ((𝐴 − 𝐵)(,)(𝐴 + 𝐵)) → 𝐶 ∈ ℝ)
5	3, 4	syl 17	. . . 4 ⊢ (𝜑 → 𝐶 ∈ ℝ)
6	5	recnd 11273	. . 3 ⊢ (𝜑 → 𝐶 ∈ ℂ)
7		eqid 2728	. . . 4 ⊢ (abs ∘ − ) = (abs ∘ − )
8	7	cnmetdval 24700	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐴(abs ∘ − )𝐶) = (abs‘(𝐴 − 𝐶)))
9	2, 6, 8	syl2anc 583	. 2 ⊢ (𝜑 → (𝐴(abs ∘ − )𝐶) = (abs‘(𝐴 − 𝐶)))
10		iooabslt.2	. . . . . . . . 9 ⊢ (𝜑 → 𝐵 ∈ ℝ)
11		eqid 2728	. . . . . . . . . 10 ⊢ ((abs ∘ − ) ↾ (ℝ × ℝ)) = ((abs ∘ − ) ↾ (ℝ × ℝ))
12	11	bl2ioo 24721	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴(ball‘((abs ∘ − ) ↾ (ℝ × ℝ)))𝐵) = ((𝐴 − 𝐵)(,)(𝐴 + 𝐵)))
13	1, 10, 12	syl2anc 583	. . . . . . . 8 ⊢ (𝜑 → (𝐴(ball‘((abs ∘ − ) ↾ (ℝ × ℝ)))𝐵) = ((𝐴 − 𝐵)(,)(𝐴 + 𝐵)))
14	3, 13	eleqtrrd 2832	. . . . . . 7 ⊢ (𝜑 → 𝐶 ∈ (𝐴(ball‘((abs ∘ − ) ↾ (ℝ × ℝ)))𝐵))
15		cnxmet 24702	. . . . . . . . 9 ⊢ (abs ∘ − ) ∈ (∞Met‘ℂ)
16	15	a1i 11	. . . . . . . 8 ⊢ (𝜑 → (abs ∘ − ) ∈ (∞Met‘ℂ))
17	2, 1	elind 4194	. . . . . . . 8 ⊢ (𝜑 → 𝐴 ∈ (ℂ ∩ ℝ))
18	10	rexrd 11295	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ ℝ^*)
19	11	blres 24350	. . . . . . . 8 ⊢ (((abs ∘ − ) ∈ (∞Met‘ℂ) ∧ 𝐴 ∈ (ℂ ∩ ℝ) ∧ 𝐵 ∈ ℝ^*) → (𝐴(ball‘((abs ∘ − ) ↾ (ℝ × ℝ)))𝐵) = ((𝐴(ball‘(abs ∘ − ))𝐵) ∩ ℝ))
20	16, 17, 18, 19	syl3anc 1369	. . . . . . 7 ⊢ (𝜑 → (𝐴(ball‘((abs ∘ − ) ↾ (ℝ × ℝ)))𝐵) = ((𝐴(ball‘(abs ∘ − ))𝐵) ∩ ℝ))
21	14, 20	eleqtrd 2831	. . . . . 6 ⊢ (𝜑 → 𝐶 ∈ ((𝐴(ball‘(abs ∘ − ))𝐵) ∩ ℝ))
22		elin 3963	. . . . . 6 ⊢ (𝐶 ∈ ((𝐴(ball‘(abs ∘ − ))𝐵) ∩ ℝ) ↔ (𝐶 ∈ (𝐴(ball‘(abs ∘ − ))𝐵) ∧ 𝐶 ∈ ℝ))
23	21, 22	sylib 217	. . . . 5 ⊢ (𝜑 → (𝐶 ∈ (𝐴(ball‘(abs ∘ − ))𝐵) ∧ 𝐶 ∈ ℝ))
24	23	simpld 494	. . . 4 ⊢ (𝜑 → 𝐶 ∈ (𝐴(ball‘(abs ∘ − ))𝐵))
25		elbl 24307	. . . . 5 ⊢ (((abs ∘ − ) ∈ (∞Met‘ℂ) ∧ 𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ^*) → (𝐶 ∈ (𝐴(ball‘(abs ∘ − ))𝐵) ↔ (𝐶 ∈ ℂ ∧ (𝐴(abs ∘ − )𝐶) < 𝐵)))
26	16, 2, 18, 25	syl3anc 1369	. . . 4 ⊢ (𝜑 → (𝐶 ∈ (𝐴(ball‘(abs ∘ − ))𝐵) ↔ (𝐶 ∈ ℂ ∧ (𝐴(abs ∘ − )𝐶) < 𝐵)))
27	24, 26	mpbid 231	. . 3 ⊢ (𝜑 → (𝐶 ∈ ℂ ∧ (𝐴(abs ∘ − )𝐶) < 𝐵))
28	27	simprd 495	. 2 ⊢ (𝜑 → (𝐴(abs ∘ − )𝐶) < 𝐵)
29	9, 28	eqbrtrrd 5172	1 ⊢ (𝜑 → (abs‘(𝐴 − 𝐶)) < 𝐵)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1534 ∈ wcel 2099 ∩ cin 3946 class class class wbr 5148 × cxp 5676 ↾ cres 5680 ∘ ccom 5682 ‘cfv 6548 (class class class)co 7420 ℂcc 11137 ℝcr 11138 + caddc 11142 ℝ^*cxr 11278 < clt 11279 − cmin 11475 (,)cioo 13357 abscabs 15214 ∞Metcxmet 21264 ballcbl 21266

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-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-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-rp 13008 df-xadd 13126 df-ioo 13361 df-seq 14000 df-exp 14060 df-cj 15079 df-re 15080 df-im 15081 df-sqrt 15215 df-abs 15216 df-psmet 21271 df-xmet 21272 df-met 21273 df-bl 21274

This theorem is referenced by: lptre2pt 45028

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