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Theorem rlimo1 15557

Description: Any function with a finite limit is eventually bounded. (Contributed by Mario Carneiro, 18-Sep-2014.)

**Assertion**
Ref	Expression
rlimo1	⊢ (𝐹 ⇝_𝑟 𝐴 → 𝐹 ∈ 𝑂(1))

Proof of Theorem rlimo1 Dummy variables 𝑤 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		rlimf 15441	. . . . . 6 ⊢ (𝐹 ⇝_𝑟 𝐴 → 𝐹:dom 𝐹⟶ℂ)
2	1	ffvelcdmda 7083	. . . . 5 ⊢ ((𝐹 ⇝_𝑟 𝐴 ∧ 𝑧 ∈ dom 𝐹) → (𝐹‘𝑧) ∈ ℂ)
3	2	ralrimiva 3146	. . . 4 ⊢ (𝐹 ⇝_𝑟 𝐴 → ∀𝑧 ∈ dom 𝐹(𝐹‘𝑧) ∈ ℂ)
4		1rp 12974	. . . . 5 ⊢ 1 ∈ ℝ⁺
5	4	a1i 11	. . . 4 ⊢ (𝐹 ⇝_𝑟 𝐴 → 1 ∈ ℝ⁺)
6	1	feqmptd 6957	. . . . 5 ⊢ (𝐹 ⇝_𝑟 𝐴 → 𝐹 = (𝑧 ∈ dom 𝐹 ↦ (𝐹‘𝑧)))
7		id 22	. . . . 5 ⊢ (𝐹 ⇝_𝑟 𝐴 → 𝐹 ⇝_𝑟 𝐴)
8	6, 7	eqbrtrrd 5171	. . . 4 ⊢ (𝐹 ⇝_𝑟 𝐴 → (𝑧 ∈ dom 𝐹 ↦ (𝐹‘𝑧)) ⇝_𝑟 𝐴)
9	3, 5, 8	rlimi 15453	. . 3 ⊢ (𝐹 ⇝_𝑟 𝐴 → ∃𝑦 ∈ ℝ ∀𝑧 ∈ dom 𝐹(𝑦 ≤ 𝑧 → (abs‘((𝐹‘𝑧) − 𝐴)) < 1))
10		rlimcl 15443	. . . . . . . 8 ⊢ (𝐹 ⇝_𝑟 𝐴 → 𝐴 ∈ ℂ)
11	10	adantr 481	. . . . . . 7 ⊢ ((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) → 𝐴 ∈ ℂ)
12	11	abscld 15379	. . . . . 6 ⊢ ((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) → (abs‘𝐴) ∈ ℝ)
13		peano2re 11383	. . . . . 6 ⊢ ((abs‘𝐴) ∈ ℝ → ((abs‘𝐴) + 1) ∈ ℝ)
14	12, 13	syl 17	. . . . 5 ⊢ ((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) → ((abs‘𝐴) + 1) ∈ ℝ)
15	2	adantlr 713	. . . . . . . . . . 11 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → (𝐹‘𝑧) ∈ ℂ)
16	11	adantr 481	. . . . . . . . . . 11 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → 𝐴 ∈ ℂ)
17	15, 16	abs2difd 15400	. . . . . . . . . 10 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → ((abs‘(𝐹‘𝑧)) − (abs‘𝐴)) ≤ (abs‘((𝐹‘𝑧) − 𝐴)))
18	15	abscld 15379	. . . . . . . . . . . 12 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → (abs‘(𝐹‘𝑧)) ∈ ℝ)
19	12	adantr 481	. . . . . . . . . . . 12 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → (abs‘𝐴) ∈ ℝ)
20	18, 19	resubcld 11638	. . . . . . . . . . 11 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → ((abs‘(𝐹‘𝑧)) − (abs‘𝐴)) ∈ ℝ)
21	15, 16	subcld 11567	. . . . . . . . . . . 12 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → ((𝐹‘𝑧) − 𝐴) ∈ ℂ)
22	21	abscld 15379	. . . . . . . . . . 11 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → (abs‘((𝐹‘𝑧) − 𝐴)) ∈ ℝ)
23		1red 11211	. . . . . . . . . . 11 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → 1 ∈ ℝ)
24		lelttr 11300	. . . . . . . . . . 11 ⊢ ((((abs‘(𝐹‘𝑧)) − (abs‘𝐴)) ∈ ℝ ∧ (abs‘((𝐹‘𝑧) − 𝐴)) ∈ ℝ ∧ 1 ∈ ℝ) → ((((abs‘(𝐹‘𝑧)) − (abs‘𝐴)) ≤ (abs‘((𝐹‘𝑧) − 𝐴)) ∧ (abs‘((𝐹‘𝑧) − 𝐴)) < 1) → ((abs‘(𝐹‘𝑧)) − (abs‘𝐴)) < 1))
25	20, 22, 23, 24	syl3anc 1371	. . . . . . . . . 10 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → ((((abs‘(𝐹‘𝑧)) − (abs‘𝐴)) ≤ (abs‘((𝐹‘𝑧) − 𝐴)) ∧ (abs‘((𝐹‘𝑧) − 𝐴)) < 1) → ((abs‘(𝐹‘𝑧)) − (abs‘𝐴)) < 1))
26	17, 25	mpand 693	. . . . . . . . 9 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → ((abs‘((𝐹‘𝑧) − 𝐴)) < 1 → ((abs‘(𝐹‘𝑧)) − (abs‘𝐴)) < 1))
27	18, 19, 23	ltsubadd2d 11808	. . . . . . . . 9 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → (((abs‘(𝐹‘𝑧)) − (abs‘𝐴)) < 1 ↔ (abs‘(𝐹‘𝑧)) < ((abs‘𝐴) + 1)))
28	26, 27	sylibd 238	. . . . . . . 8 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → ((abs‘((𝐹‘𝑧) − 𝐴)) < 1 → (abs‘(𝐹‘𝑧)) < ((abs‘𝐴) + 1)))
29	14	adantr 481	. . . . . . . . 9 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → ((abs‘𝐴) + 1) ∈ ℝ)
30		ltle 11298	. . . . . . . . 9 ⊢ (((abs‘(𝐹‘𝑧)) ∈ ℝ ∧ ((abs‘𝐴) + 1) ∈ ℝ) → ((abs‘(𝐹‘𝑧)) < ((abs‘𝐴) + 1) → (abs‘(𝐹‘𝑧)) ≤ ((abs‘𝐴) + 1)))
31	18, 29, 30	syl2anc 584	. . . . . . . 8 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → ((abs‘(𝐹‘𝑧)) < ((abs‘𝐴) + 1) → (abs‘(𝐹‘𝑧)) ≤ ((abs‘𝐴) + 1)))
32	28, 31	syld 47	. . . . . . 7 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → ((abs‘((𝐹‘𝑧) − 𝐴)) < 1 → (abs‘(𝐹‘𝑧)) ≤ ((abs‘𝐴) + 1)))
33	32	imim2d 57	. . . . . 6 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → ((𝑦 ≤ 𝑧 → (abs‘((𝐹‘𝑧) − 𝐴)) < 1) → (𝑦 ≤ 𝑧 → (abs‘(𝐹‘𝑧)) ≤ ((abs‘𝐴) + 1))))
34	33	ralimdva 3167	. . . . 5 ⊢ ((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) → (∀𝑧 ∈ dom 𝐹(𝑦 ≤ 𝑧 → (abs‘((𝐹‘𝑧) − 𝐴)) < 1) → ∀𝑧 ∈ dom 𝐹(𝑦 ≤ 𝑧 → (abs‘(𝐹‘𝑧)) ≤ ((abs‘𝐴) + 1))))
35		breq2 5151	. . . . . . . 8 ⊢ (𝑤 = ((abs‘𝐴) + 1) → ((abs‘(𝐹‘𝑧)) ≤ 𝑤 ↔ (abs‘(𝐹‘𝑧)) ≤ ((abs‘𝐴) + 1)))
36	35	imbi2d 340	. . . . . . 7 ⊢ (𝑤 = ((abs‘𝐴) + 1) → ((𝑦 ≤ 𝑧 → (abs‘(𝐹‘𝑧)) ≤ 𝑤) ↔ (𝑦 ≤ 𝑧 → (abs‘(𝐹‘𝑧)) ≤ ((abs‘𝐴) + 1))))
37	36	ralbidv 3177	. . . . . 6 ⊢ (𝑤 = ((abs‘𝐴) + 1) → (∀𝑧 ∈ dom 𝐹(𝑦 ≤ 𝑧 → (abs‘(𝐹‘𝑧)) ≤ 𝑤) ↔ ∀𝑧 ∈ dom 𝐹(𝑦 ≤ 𝑧 → (abs‘(𝐹‘𝑧)) ≤ ((abs‘𝐴) + 1))))
38	37	rspcev 3612	. . . . 5 ⊢ ((((abs‘𝐴) + 1) ∈ ℝ ∧ ∀𝑧 ∈ dom 𝐹(𝑦 ≤ 𝑧 → (abs‘(𝐹‘𝑧)) ≤ ((abs‘𝐴) + 1))) → ∃𝑤 ∈ ℝ ∀𝑧 ∈ dom 𝐹(𝑦 ≤ 𝑧 → (abs‘(𝐹‘𝑧)) ≤ 𝑤))
39	14, 34, 38	syl6an 682	. . . 4 ⊢ ((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) → (∀𝑧 ∈ dom 𝐹(𝑦 ≤ 𝑧 → (abs‘((𝐹‘𝑧) − 𝐴)) < 1) → ∃𝑤 ∈ ℝ ∀𝑧 ∈ dom 𝐹(𝑦 ≤ 𝑧 → (abs‘(𝐹‘𝑧)) ≤ 𝑤)))
40	39	reximdva 3168	. . 3 ⊢ (𝐹 ⇝_𝑟 𝐴 → (∃𝑦 ∈ ℝ ∀𝑧 ∈ dom 𝐹(𝑦 ≤ 𝑧 → (abs‘((𝐹‘𝑧) − 𝐴)) < 1) → ∃𝑦 ∈ ℝ ∃𝑤 ∈ ℝ ∀𝑧 ∈ dom 𝐹(𝑦 ≤ 𝑧 → (abs‘(𝐹‘𝑧)) ≤ 𝑤)))
41	9, 40	mpd 15	. 2 ⊢ (𝐹 ⇝_𝑟 𝐴 → ∃𝑦 ∈ ℝ ∃𝑤 ∈ ℝ ∀𝑧 ∈ dom 𝐹(𝑦 ≤ 𝑧 → (abs‘(𝐹‘𝑧)) ≤ 𝑤))
42		rlimss 15442	. . 3 ⊢ (𝐹 ⇝_𝑟 𝐴 → dom 𝐹 ⊆ ℝ)
43		elo12 15467	. . 3 ⊢ ((𝐹:dom 𝐹⟶ℂ ∧ dom 𝐹 ⊆ ℝ) → (𝐹 ∈ 𝑂(1) ↔ ∃𝑦 ∈ ℝ ∃𝑤 ∈ ℝ ∀𝑧 ∈ dom 𝐹(𝑦 ≤ 𝑧 → (abs‘(𝐹‘𝑧)) ≤ 𝑤)))
44	1, 42, 43	syl2anc 584	. 2 ⊢ (𝐹 ⇝_𝑟 𝐴 → (𝐹 ∈ 𝑂(1) ↔ ∃𝑦 ∈ ℝ ∃𝑤 ∈ ℝ ∀𝑧 ∈ dom 𝐹(𝑦 ≤ 𝑧 → (abs‘(𝐹‘𝑧)) ≤ 𝑤)))
45	41, 44	mpbird 256	1 ⊢ (𝐹 ⇝_𝑟 𝐴 → 𝐹 ∈ 𝑂(1))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1541 ∈ wcel 2106 ∀wral 3061 ∃wrex 3070 ⊆ wss 3947 class class class wbr 5147 ↦ cmpt 5230 dom cdm 5675 ⟶wf 6536 ‘cfv 6540 (class class class)co 7405 ℂcc 11104 ℝcr 11105 1c1 11107 + caddc 11109 < clt 11244 ≤ cle 11245 − cmin 11440 ℝ⁺crp 12970 abscabs 15177 ⇝_𝑟 crli 15425 𝑂(1)co1 15426

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-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 ax-pre-sup 11184

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 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7852 df-2nd 7972 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-er 8699 df-pm 8819 df-en 8936 df-dom 8937 df-sdom 8938 df-sup 9433 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-div 11868 df-nn 12209 df-2 12271 df-3 12272 df-n0 12469 df-z 12555 df-uz 12819 df-rp 12971 df-ico 13326 df-seq 13963 df-exp 14024 df-cj 15042 df-re 15043 df-im 15044 df-sqrt 15178 df-abs 15179 df-rlim 15429 df-o1 15430

This theorem is referenced by: rlimdmo1 15558 o1const 15560 chebbnd2 26969 chto1lb 26970 chpo1ub 26972 vmadivsum 26974 dchrvmasumlem2 26990 dchrisum0lem1 27008 dchrisum0lem2a 27009 mudivsum 27022 mulog2sumlem2 27027 vmalogdivsum2 27030 2vmadivsumlem 27032 selberglem2 27038 selberg2lem 27042 selberg4lem1 27052 pntrsumo1 27057 pntrlog2bndlem2 27070 pntrlog2bndlem4 27072 pntrlog2bndlem5 27073

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