Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > climliminflimsupd | Structured version Visualization version GIF version |
Description: If a sequence of real numbers converges, its inferior limit and its superior limit are equal. (Contributed by Glauco Siliprandi, 2-Jan-2022.) |
Ref | Expression |
---|---|
climliminflimsupd.1 | ⊢ (𝜑 → 𝑀 ∈ ℤ) |
climliminflimsupd.2 | ⊢ 𝑍 = (ℤ≥‘𝑀) |
climliminflimsupd.3 | ⊢ (𝜑 → 𝐹:𝑍⟶ℝ) |
climliminflimsupd.4 | ⊢ (𝜑 → 𝐹 ∈ dom ⇝ ) |
Ref | Expression |
---|---|
climliminflimsupd | ⊢ (𝜑 → (lim inf‘𝐹) = (lim sup‘𝐹)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | climliminflimsupd.3 | . . . . . . 7 ⊢ (𝜑 → 𝐹:𝑍⟶ℝ) | |
2 | 1 | feqmptd 6740 | . . . . . 6 ⊢ (𝜑 → 𝐹 = (𝑘 ∈ 𝑍 ↦ (𝐹‘𝑘))) |
3 | 2 | fveq2d 6681 | . . . . 5 ⊢ (𝜑 → (lim inf‘𝐹) = (lim inf‘(𝑘 ∈ 𝑍 ↦ (𝐹‘𝑘)))) |
4 | climliminflimsupd.2 | . . . . . . . . 9 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
5 | 4 | fvexi 6691 | . . . . . . . 8 ⊢ 𝑍 ∈ V |
6 | 5 | mptex 6999 | . . . . . . 7 ⊢ (𝑘 ∈ 𝑍 ↦ (𝐹‘𝑘)) ∈ V |
7 | liminfcl 42869 | . . . . . . 7 ⊢ ((𝑘 ∈ 𝑍 ↦ (𝐹‘𝑘)) ∈ V → (lim inf‘(𝑘 ∈ 𝑍 ↦ (𝐹‘𝑘))) ∈ ℝ*) | |
8 | 6, 7 | ax-mp 5 | . . . . . 6 ⊢ (lim inf‘(𝑘 ∈ 𝑍 ↦ (𝐹‘𝑘))) ∈ ℝ* |
9 | 8 | a1i 11 | . . . . 5 ⊢ (𝜑 → (lim inf‘(𝑘 ∈ 𝑍 ↦ (𝐹‘𝑘))) ∈ ℝ*) |
10 | 3, 9 | eqeltrd 2834 | . . . 4 ⊢ (𝜑 → (lim inf‘𝐹) ∈ ℝ*) |
11 | nfv 1921 | . . . . . . 7 ⊢ Ⅎ𝑘𝜑 | |
12 | climliminflimsupd.1 | . . . . . . 7 ⊢ (𝜑 → 𝑀 ∈ ℤ) | |
13 | 1 | ffvelrnda 6864 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) ∈ ℝ) |
14 | 13 | renegcld 11148 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → -(𝐹‘𝑘) ∈ ℝ) |
15 | 11, 12, 4, 14 | limsupvaluz4 42906 | . . . . . 6 ⊢ (𝜑 → (lim sup‘(𝑘 ∈ 𝑍 ↦ -(𝐹‘𝑘))) = -𝑒(lim inf‘(𝑘 ∈ 𝑍 ↦ --(𝐹‘𝑘)))) |
16 | climrel 14942 | . . . . . . . . . 10 ⊢ Rel ⇝ | |
17 | 16 | a1i 11 | . . . . . . . . 9 ⊢ (𝜑 → Rel ⇝ ) |
18 | nfcv 2900 | . . . . . . . . . 10 ⊢ Ⅎ𝑘𝐹 | |
19 | climliminflimsupd.4 | . . . . . . . . . . 11 ⊢ (𝜑 → 𝐹 ∈ dom ⇝ ) | |
20 | 12, 4, 1 | climlimsup 42866 | . . . . . . . . . . 11 ⊢ (𝜑 → (𝐹 ∈ dom ⇝ ↔ 𝐹 ⇝ (lim sup‘𝐹))) |
21 | 19, 20 | mpbid 235 | . . . . . . . . . 10 ⊢ (𝜑 → 𝐹 ⇝ (lim sup‘𝐹)) |
22 | 13 | recnd 10750 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) ∈ ℂ) |
23 | 11, 18, 4, 12, 21, 22 | climneg 42716 | . . . . . . . . 9 ⊢ (𝜑 → (𝑘 ∈ 𝑍 ↦ -(𝐹‘𝑘)) ⇝ -(lim sup‘𝐹)) |
24 | releldm 5788 | . . . . . . . . 9 ⊢ ((Rel ⇝ ∧ (𝑘 ∈ 𝑍 ↦ -(𝐹‘𝑘)) ⇝ -(lim sup‘𝐹)) → (𝑘 ∈ 𝑍 ↦ -(𝐹‘𝑘)) ∈ dom ⇝ ) | |
25 | 17, 23, 24 | syl2anc 587 | . . . . . . . 8 ⊢ (𝜑 → (𝑘 ∈ 𝑍 ↦ -(𝐹‘𝑘)) ∈ dom ⇝ ) |
26 | 14 | fmpttd 6892 | . . . . . . . . 9 ⊢ (𝜑 → (𝑘 ∈ 𝑍 ↦ -(𝐹‘𝑘)):𝑍⟶ℝ) |
27 | 12, 4, 26 | climlimsup 42866 | . . . . . . . 8 ⊢ (𝜑 → ((𝑘 ∈ 𝑍 ↦ -(𝐹‘𝑘)) ∈ dom ⇝ ↔ (𝑘 ∈ 𝑍 ↦ -(𝐹‘𝑘)) ⇝ (lim sup‘(𝑘 ∈ 𝑍 ↦ -(𝐹‘𝑘))))) |
28 | 25, 27 | mpbid 235 | . . . . . . 7 ⊢ (𝜑 → (𝑘 ∈ 𝑍 ↦ -(𝐹‘𝑘)) ⇝ (lim sup‘(𝑘 ∈ 𝑍 ↦ -(𝐹‘𝑘)))) |
29 | climuni 15002 | . . . . . . 7 ⊢ (((𝑘 ∈ 𝑍 ↦ -(𝐹‘𝑘)) ⇝ (lim sup‘(𝑘 ∈ 𝑍 ↦ -(𝐹‘𝑘))) ∧ (𝑘 ∈ 𝑍 ↦ -(𝐹‘𝑘)) ⇝ -(lim sup‘𝐹)) → (lim sup‘(𝑘 ∈ 𝑍 ↦ -(𝐹‘𝑘))) = -(lim sup‘𝐹)) | |
30 | 28, 23, 29 | syl2anc 587 | . . . . . 6 ⊢ (𝜑 → (lim sup‘(𝑘 ∈ 𝑍 ↦ -(𝐹‘𝑘))) = -(lim sup‘𝐹)) |
31 | 22 | negnegd 11069 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → --(𝐹‘𝑘) = (𝐹‘𝑘)) |
32 | 31 | mpteq2dva 5126 | . . . . . . . . 9 ⊢ (𝜑 → (𝑘 ∈ 𝑍 ↦ --(𝐹‘𝑘)) = (𝑘 ∈ 𝑍 ↦ (𝐹‘𝑘))) |
33 | 32, 2 | eqtr4d 2777 | . . . . . . . 8 ⊢ (𝜑 → (𝑘 ∈ 𝑍 ↦ --(𝐹‘𝑘)) = 𝐹) |
34 | 33 | fveq2d 6681 | . . . . . . 7 ⊢ (𝜑 → (lim inf‘(𝑘 ∈ 𝑍 ↦ --(𝐹‘𝑘))) = (lim inf‘𝐹)) |
35 | 34 | xnegeqd 42538 | . . . . . 6 ⊢ (𝜑 → -𝑒(lim inf‘(𝑘 ∈ 𝑍 ↦ --(𝐹‘𝑘))) = -𝑒(lim inf‘𝐹)) |
36 | 15, 30, 35 | 3eqtr3d 2782 | . . . . 5 ⊢ (𝜑 → -(lim sup‘𝐹) = -𝑒(lim inf‘𝐹)) |
37 | 4, 12, 21, 13 | climrecl 15033 | . . . . . 6 ⊢ (𝜑 → (lim sup‘𝐹) ∈ ℝ) |
38 | 37 | renegcld 11148 | . . . . 5 ⊢ (𝜑 → -(lim sup‘𝐹) ∈ ℝ) |
39 | 36, 38 | eqeltrrd 2835 | . . . 4 ⊢ (𝜑 → -𝑒(lim inf‘𝐹) ∈ ℝ) |
40 | xnegrecl2 42563 | . . . 4 ⊢ (((lim inf‘𝐹) ∈ ℝ* ∧ -𝑒(lim inf‘𝐹) ∈ ℝ) → (lim inf‘𝐹) ∈ ℝ) | |
41 | 10, 39, 40 | syl2anc 587 | . . 3 ⊢ (𝜑 → (lim inf‘𝐹) ∈ ℝ) |
42 | 41 | recnd 10750 | . 2 ⊢ (𝜑 → (lim inf‘𝐹) ∈ ℂ) |
43 | 37 | recnd 10750 | . 2 ⊢ (𝜑 → (lim sup‘𝐹) ∈ ℂ) |
44 | 41 | rexnegd 42253 | . . 3 ⊢ (𝜑 → -𝑒(lim inf‘𝐹) = -(lim inf‘𝐹)) |
45 | 36, 44 | eqtr2d 2775 | . 2 ⊢ (𝜑 → -(lim inf‘𝐹) = -(lim sup‘𝐹)) |
46 | 42, 43, 45 | neg11d 11090 | 1 ⊢ (𝜑 → (lim inf‘𝐹) = (lim sup‘𝐹)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 = wceq 1542 ∈ wcel 2114 Vcvv 3399 class class class wbr 5031 ↦ cmpt 5111 dom cdm 5526 Rel wrel 5531 ⟶wf 6336 ‘cfv 6340 ℝcr 10617 ℝ*cxr 10755 -cneg 10952 ℤcz 12065 ℤ≥cuz 12327 -𝑒cxne 12590 lim supclsp 14920 ⇝ cli 14934 lim infclsi 42857 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2020 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2162 ax-12 2179 ax-ext 2711 ax-rep 5155 ax-sep 5168 ax-nul 5175 ax-pow 5233 ax-pr 5297 ax-un 7482 ax-cnex 10674 ax-resscn 10675 ax-1cn 10676 ax-icn 10677 ax-addcl 10678 ax-addrcl 10679 ax-mulcl 10680 ax-mulrcl 10681 ax-mulcom 10682 ax-addass 10683 ax-mulass 10684 ax-distr 10685 ax-i2m1 10686 ax-1ne0 10687 ax-1rid 10688 ax-rnegex 10689 ax-rrecex 10690 ax-cnre 10691 ax-pre-lttri 10692 ax-pre-lttrn 10693 ax-pre-ltadd 10694 ax-pre-mulgt0 10695 ax-pre-sup 10696 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2075 df-mo 2541 df-eu 2571 df-clab 2718 df-cleq 2731 df-clel 2812 df-nfc 2882 df-ne 2936 df-nel 3040 df-ral 3059 df-rex 3060 df-reu 3061 df-rmo 3062 df-rab 3063 df-v 3401 df-sbc 3682 df-csb 3792 df-dif 3847 df-un 3849 df-in 3851 df-ss 3861 df-pss 3863 df-nul 4213 df-if 4416 df-pw 4491 df-sn 4518 df-pr 4520 df-tp 4522 df-op 4524 df-uni 4798 df-iun 4884 df-br 5032 df-opab 5094 df-mpt 5112 df-tr 5138 df-id 5430 df-eprel 5435 df-po 5443 df-so 5444 df-fr 5484 df-we 5486 df-xp 5532 df-rel 5533 df-cnv 5534 df-co 5535 df-dm 5536 df-rn 5537 df-res 5538 df-ima 5539 df-pred 6130 df-ord 6176 df-on 6177 df-lim 6178 df-suc 6179 df-iota 6298 df-fun 6342 df-fn 6343 df-f 6344 df-f1 6345 df-fo 6346 df-f1o 6347 df-fv 6348 df-isom 6349 df-riota 7130 df-ov 7176 df-oprab 7177 df-mpo 7178 df-om 7603 df-1st 7717 df-2nd 7718 df-wrecs 7979 df-recs 8040 df-rdg 8078 df-er 8323 df-pm 8443 df-en 8559 df-dom 8560 df-sdom 8561 df-sup 8982 df-inf 8983 df-pnf 10758 df-mnf 10759 df-xr 10760 df-ltxr 10761 df-le 10762 df-sub 10953 df-neg 10954 df-div 11379 df-nn 11720 df-2 11782 df-3 11783 df-n0 11980 df-z 12066 df-uz 12328 df-q 12434 df-rp 12476 df-xneg 12593 df-ico 12830 df-fl 13256 df-seq 13464 df-exp 13525 df-cj 14551 df-re 14552 df-im 14553 df-sqrt 14687 df-abs 14688 df-limsup 14921 df-clim 14938 df-rlim 14939 df-liminf 42858 |
This theorem is referenced by: climliminf 42912 climliminflimsup 42914 climliminflimsup2 42915 xlimliminflimsup 42968 |
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