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| Mirrors > Home > MPE Home > Th. List > Mathboxes > climliminflimsup3 | Structured version Visualization version GIF version | ||
| Description: A sequence of real numbers converges if and only if its inferior limit is real and equal to its superior limit. (Contributed by Glauco Siliprandi, 2-Jan-2022.) |
| Ref | Expression |
|---|---|
| climliminflimsup3.1 | ⊢ (𝜑 → 𝑀 ∈ ℤ) |
| climliminflimsup3.2 | ⊢ 𝑍 = (ℤ≥‘𝑀) |
| climliminflimsup3.3 | ⊢ (𝜑 → 𝐹:𝑍⟶ℝ) |
| Ref | Expression |
|---|---|
| climliminflimsup3 | ⊢ (𝜑 → (𝐹 ∈ dom ⇝ ↔ ((lim inf‘𝐹) ∈ ℝ ∧ (lim inf‘𝐹) = (lim sup‘𝐹)))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | climliminflimsup3.1 | . . 3 ⊢ (𝜑 → 𝑀 ∈ ℤ) | |
| 2 | climliminflimsup3.2 | . . 3 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
| 3 | climliminflimsup3.3 | . . 3 ⊢ (𝜑 → 𝐹:𝑍⟶ℝ) | |
| 4 | 1, 2, 3 | climliminflimsup 46474 | . 2 ⊢ (𝜑 → (𝐹 ∈ dom ⇝ ↔ ((lim inf‘𝐹) ∈ ℝ ∧ (lim sup‘𝐹) ≤ (lim inf‘𝐹)))) |
| 5 | 3 | frexr 46052 | . . . 4 ⊢ (𝜑 → 𝐹:𝑍⟶ℝ*) |
| 6 | 1, 2, 5 | liminfgelimsupuz 46454 | . . 3 ⊢ (𝜑 → ((lim sup‘𝐹) ≤ (lim inf‘𝐹) ↔ (lim inf‘𝐹) = (lim sup‘𝐹))) |
| 7 | 6 | anbi2d 641 | . 2 ⊢ (𝜑 → (((lim inf‘𝐹) ∈ ℝ ∧ (lim sup‘𝐹) ≤ (lim inf‘𝐹)) ↔ ((lim inf‘𝐹) ∈ ℝ ∧ (lim inf‘𝐹) = (lim sup‘𝐹)))) |
| 8 | 4, 7 | bitrd 282 | 1 ⊢ (𝜑 → (𝐹 ∈ dom ⇝ ↔ ((lim inf‘𝐹) ∈ ℝ ∧ (lim inf‘𝐹) = (lim sup‘𝐹)))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1568 ∈ wcel 2150 class class class wbr 5114 dom cdm 5665 ⟶wf 6536 ‘cfv 6540 ℝcr 11102 ≤ cle 11247 ℤcz 12594 ℤ≥cuz 12865 lim supclsp 15524 ⇝ cli 15538 lim infclsi 46417 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1823 ax-4 1837 ax-5 1938 ax-6 1995 ax-7 2036 ax-8 2152 ax-9 2160 ax-10 2183 ax-11 2199 ax-12 2220 ax-ext 2742 ax-rep 5243 ax-sep 5262 ax-nul 5274 ax-pow 5340 ax-pr 5408 ax-un 7736 ax-cnex 11159 ax-resscn 11160 ax-1cn 11161 ax-icn 11162 ax-addcl 11163 ax-addrcl 11164 ax-mulcl 11165 ax-mulrcl 11166 ax-mulcom 11167 ax-addass 11168 ax-mulass 11169 ax-distr 11170 ax-i2m1 11171 ax-1ne0 11172 ax-1rid 11173 ax-rnegex 11174 ax-rrecex 11175 ax-cnre 11176 ax-pre-lttri 11177 ax-pre-lttrn 11178 ax-pre-ltadd 11179 ax-pre-mulgt0 11180 ax-pre-sup 11181 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1571 df-fal 1581 df-ex 1808 df-nf 1812 df-sb 2099 df-mo 2574 df-eu 2604 df-clab 2749 df-cleq 2762 df-clel 2845 df-nfc 2919 df-ne 2966 df-nel 3072 df-ral 3087 df-rex 3097 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3464 df-sbc 3753 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5560 df-eprel 5565 df-po 5573 df-so 5574 df-fr 5618 df-we 5620 df-xp 5671 df-rel 5672 df-cnv 5673 df-co 5674 df-dm 5675 df-rn 5676 df-res 5677 df-ima 5678 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-isom 6549 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7866 df-1st 7989 df-2nd 7990 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-1o 8456 df-er 8697 df-pm 8830 df-en 8947 df-dom 8948 df-sdom 8949 df-fin 8950 df-sup 9405 df-inf 9406 df-pnf 11248 df-mnf 11249 df-xr 11250 df-ltxr 11251 df-le 11252 df-sub 11446 df-neg 11447 df-div 11875 df-nn 12237 df-2 12306 df-3 12307 df-n0 12508 df-z 12595 df-uz 12866 df-q 12976 df-rp 13020 df-xneg 13140 df-xadd 13141 df-ioo 13379 df-ico 13381 df-fz 13539 df-fzo 13686 df-fl 13828 df-ceil 13829 df-seq 14041 df-exp 14101 df-cj 15153 df-re 15154 df-im 15155 df-sqrt 15289 df-abs 15290 df-limsup 15525 df-clim 15542 df-rlim 15543 df-liminf 46418 |
| This theorem is referenced by: xlimliminflimsup 46528 |
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