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Theorem rlimo1 15561

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 15445	. . . . . 6 ⊢ (𝐹 ⇝_𝑟 𝐴 → 𝐹:dom 𝐹⟶ℂ)
2	1	ffvelcdmda 7087	. . . . 5 ⊢ ((𝐹 ⇝_𝑟 𝐴 ∧ 𝑧 ∈ dom 𝐹) → (𝐹‘𝑧) ∈ ℂ)
3	2	ralrimiva 3147	. . . 4 ⊢ (𝐹 ⇝_𝑟 𝐴 → ∀𝑧 ∈ dom 𝐹(𝐹‘𝑧) ∈ ℂ)
4		1rp 12978	. . . . 5 ⊢ 1 ∈ ℝ⁺
5	4	a1i 11	. . . 4 ⊢ (𝐹 ⇝_𝑟 𝐴 → 1 ∈ ℝ⁺)
6	1	feqmptd 6961	. . . . 5 ⊢ (𝐹 ⇝_𝑟 𝐴 → 𝐹 = (𝑧 ∈ dom 𝐹 ↦ (𝐹‘𝑧)))
7		id 22	. . . . 5 ⊢ (𝐹 ⇝_𝑟 𝐴 → 𝐹 ⇝_𝑟 𝐴)
8	6, 7	eqbrtrrd 5173	. . . 4 ⊢ (𝐹 ⇝_𝑟 𝐴 → (𝑧 ∈ dom 𝐹 ↦ (𝐹‘𝑧)) ⇝_𝑟 𝐴)
9	3, 5, 8	rlimi 15457	. . 3 ⊢ (𝐹 ⇝_𝑟 𝐴 → ∃𝑦 ∈ ℝ ∀𝑧 ∈ dom 𝐹(𝑦 ≤ 𝑧 → (abs‘((𝐹‘𝑧) − 𝐴)) < 1))
10		rlimcl 15447	. . . . . . . 8 ⊢ (𝐹 ⇝_𝑟 𝐴 → 𝐴 ∈ ℂ)
11	10	adantr 482	. . . . . . 7 ⊢ ((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) → 𝐴 ∈ ℂ)
12	11	abscld 15383	. . . . . 6 ⊢ ((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) → (abs‘𝐴) ∈ ℝ)
13		peano2re 11387	. . . . . 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 714	. . . . . . . . . . 11 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → (𝐹‘𝑧) ∈ ℂ)
16	11	adantr 482	. . . . . . . . . . 11 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → 𝐴 ∈ ℂ)
17	15, 16	abs2difd 15404	. . . . . . . . . 10 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → ((abs‘(𝐹‘𝑧)) − (abs‘𝐴)) ≤ (abs‘((𝐹‘𝑧) − 𝐴)))
18	15	abscld 15383	. . . . . . . . . . . 12 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → (abs‘(𝐹‘𝑧)) ∈ ℝ)
19	12	adantr 482	. . . . . . . . . . . 12 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → (abs‘𝐴) ∈ ℝ)
20	18, 19	resubcld 11642	. . . . . . . . . . 11 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → ((abs‘(𝐹‘𝑧)) − (abs‘𝐴)) ∈ ℝ)
21	15, 16	subcld 11571	. . . . . . . . . . . 12 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → ((𝐹‘𝑧) − 𝐴) ∈ ℂ)
22	21	abscld 15383	. . . . . . . . . . 11 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → (abs‘((𝐹‘𝑧) − 𝐴)) ∈ ℝ)
23		1red 11215	. . . . . . . . . . 11 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → 1 ∈ ℝ)
24		lelttr 11304	. . . . . . . . . . 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 1372	. . . . . . . . . 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 694	. . . . . . . . 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 11812	. . . . . . . . 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 482	. . . . . . . . 9 ⊢ (((𝐹 ⇝_𝑟 𝐴 ∧ 𝑦 ∈ ℝ) ∧ 𝑧 ∈ dom 𝐹) → ((abs‘𝐴) + 1) ∈ ℝ)
30		ltle 11302	. . . . . . . . 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 585	. . . . . . . 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 3168	. . . . 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 5153	. . . . . . . 8 ⊢ (𝑤 = ((abs‘𝐴) + 1) → ((abs‘(𝐹‘𝑧)) ≤ 𝑤 ↔ (abs‘(𝐹‘𝑧)) ≤ ((abs‘𝐴) + 1)))
36	35	imbi2d 341	. . . . . . 7 ⊢ (𝑤 = ((abs‘𝐴) + 1) → ((𝑦 ≤ 𝑧 → (abs‘(𝐹‘𝑧)) ≤ 𝑤) ↔ (𝑦 ≤ 𝑧 → (abs‘(𝐹‘𝑧)) ≤ ((abs‘𝐴) + 1))))
37	36	ralbidv 3178	. . . . . 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 3613	. . . . 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 683	. . . 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 3169	. . 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 15446	. . 3 ⊢ (𝐹 ⇝_𝑟 𝐴 → dom 𝐹 ⊆ ℝ)
43		elo12 15471	. . 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 585	. 2 ⊢ (𝐹 ⇝_𝑟 𝐴 → (𝐹 ∈ 𝑂(1) ↔ ∃𝑦 ∈ ℝ ∃𝑤 ∈ ℝ ∀𝑧 ∈ dom 𝐹(𝑦 ≤ 𝑧 → (abs‘(𝐹‘𝑧)) ≤ 𝑤)))
45	41, 44	mpbird 257	1 ⊢ (𝐹 ⇝_𝑟 𝐴 → 𝐹 ∈ 𝑂(1))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 = wceq 1542 ∈ wcel 2107 ∀wral 3062 ∃wrex 3071 ⊆ wss 3949 class class class wbr 5149 ↦ cmpt 5232 dom cdm 5677 ⟶wf 6540 ‘cfv 6544 (class class class)co 7409 ℂcc 11108 ℝcr 11109 1c1 11111 + caddc 11113 < clt 11248 ≤ cle 11249 − cmin 11444 ℝ⁺crp 12974 abscabs 15181 ⇝_𝑟 crli 15429 𝑂(1)co1 15430

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-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-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-er 8703 df-pm 8823 df-en 8940 df-dom 8941 df-sdom 8942 df-sup 9437 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-rp 12975 df-ico 13330 df-seq 13967 df-exp 14028 df-cj 15046 df-re 15047 df-im 15048 df-sqrt 15182 df-abs 15183 df-rlim 15433 df-o1 15434

This theorem is referenced by: rlimdmo1 15562 o1const 15564 chebbnd2 26980 chto1lb 26981 chpo1ub 26983 vmadivsum 26985 dchrvmasumlem2 27001 dchrisum0lem1 27019 dchrisum0lem2a 27020 mudivsum 27033 mulog2sumlem2 27038 vmalogdivsum2 27041 2vmadivsumlem 27043 selberglem2 27049 selberg2lem 27053 selberg4lem1 27063 pntrsumo1 27068 pntrlog2bndlem2 27081 pntrlog2bndlem4 27083 pntrlog2bndlem5 27084

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