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Mirrors > Home > ILE Home > Th. List > cnlimcim | GIF version |
Description: If 𝐹 is a continuous function, the limit of the function at each point equals the value of the function. (Contributed by Mario Carneiro, 28-Dec-2016.) (Revised by Jim Kingdon, 16-Jun-2023.) |
Ref | Expression |
---|---|
cnlimcim | ⊢ (𝐴 ⊆ ℂ → (𝐹 ∈ (𝐴–cn→ℂ) → (𝐹:𝐴⟶ℂ ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ (𝐹 limℂ 𝑥)))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssid 3162 | . . . . 5 ⊢ ℂ ⊆ ℂ | |
2 | eqid 2165 | . . . . . 6 ⊢ (MetOpen‘(abs ∘ − )) = (MetOpen‘(abs ∘ − )) | |
3 | eqid 2165 | . . . . . 6 ⊢ ((MetOpen‘(abs ∘ − )) ↾t 𝐴) = ((MetOpen‘(abs ∘ − )) ↾t 𝐴) | |
4 | 2 | cntoptopon 13172 | . . . . . . 7 ⊢ (MetOpen‘(abs ∘ − )) ∈ (TopOn‘ℂ) |
5 | 4 | toponrestid 12659 | . . . . . 6 ⊢ (MetOpen‘(abs ∘ − )) = ((MetOpen‘(abs ∘ − )) ↾t ℂ) |
6 | 2, 3, 5 | cncfcncntop 13220 | . . . . 5 ⊢ ((𝐴 ⊆ ℂ ∧ ℂ ⊆ ℂ) → (𝐴–cn→ℂ) = (((MetOpen‘(abs ∘ − )) ↾t 𝐴) Cn (MetOpen‘(abs ∘ − )))) |
7 | 1, 6 | mpan2 422 | . . . 4 ⊢ (𝐴 ⊆ ℂ → (𝐴–cn→ℂ) = (((MetOpen‘(abs ∘ − )) ↾t 𝐴) Cn (MetOpen‘(abs ∘ − )))) |
8 | 7 | eleq2d 2236 | . . 3 ⊢ (𝐴 ⊆ ℂ → (𝐹 ∈ (𝐴–cn→ℂ) ↔ 𝐹 ∈ (((MetOpen‘(abs ∘ − )) ↾t 𝐴) Cn (MetOpen‘(abs ∘ − ))))) |
9 | resttopon 12811 | . . . . 5 ⊢ (((MetOpen‘(abs ∘ − )) ∈ (TopOn‘ℂ) ∧ 𝐴 ⊆ ℂ) → ((MetOpen‘(abs ∘ − )) ↾t 𝐴) ∈ (TopOn‘𝐴)) | |
10 | 4, 9 | mpan 421 | . . . 4 ⊢ (𝐴 ⊆ ℂ → ((MetOpen‘(abs ∘ − )) ↾t 𝐴) ∈ (TopOn‘𝐴)) |
11 | cncnp 12870 | . . . 4 ⊢ ((((MetOpen‘(abs ∘ − )) ↾t 𝐴) ∈ (TopOn‘𝐴) ∧ (MetOpen‘(abs ∘ − )) ∈ (TopOn‘ℂ)) → (𝐹 ∈ (((MetOpen‘(abs ∘ − )) ↾t 𝐴) Cn (MetOpen‘(abs ∘ − ))) ↔ (𝐹:𝐴⟶ℂ ∧ ∀𝑥 ∈ 𝐴 𝐹 ∈ ((((MetOpen‘(abs ∘ − )) ↾t 𝐴) CnP (MetOpen‘(abs ∘ − )))‘𝑥)))) | |
12 | 10, 4, 11 | sylancl 410 | . . 3 ⊢ (𝐴 ⊆ ℂ → (𝐹 ∈ (((MetOpen‘(abs ∘ − )) ↾t 𝐴) Cn (MetOpen‘(abs ∘ − ))) ↔ (𝐹:𝐴⟶ℂ ∧ ∀𝑥 ∈ 𝐴 𝐹 ∈ ((((MetOpen‘(abs ∘ − )) ↾t 𝐴) CnP (MetOpen‘(abs ∘ − )))‘𝑥)))) |
13 | 8, 12 | bitrd 187 | . 2 ⊢ (𝐴 ⊆ ℂ → (𝐹 ∈ (𝐴–cn→ℂ) ↔ (𝐹:𝐴⟶ℂ ∧ ∀𝑥 ∈ 𝐴 𝐹 ∈ ((((MetOpen‘(abs ∘ − )) ↾t 𝐴) CnP (MetOpen‘(abs ∘ − )))‘𝑥)))) |
14 | 2, 3 | cnplimcim 13276 | . . . . 5 ⊢ ((𝐴 ⊆ ℂ ∧ 𝑥 ∈ 𝐴) → (𝐹 ∈ ((((MetOpen‘(abs ∘ − )) ↾t 𝐴) CnP (MetOpen‘(abs ∘ − )))‘𝑥) → (𝐹:𝐴⟶ℂ ∧ (𝐹‘𝑥) ∈ (𝐹 limℂ 𝑥)))) |
15 | simpr 109 | . . . . 5 ⊢ ((𝐹:𝐴⟶ℂ ∧ (𝐹‘𝑥) ∈ (𝐹 limℂ 𝑥)) → (𝐹‘𝑥) ∈ (𝐹 limℂ 𝑥)) | |
16 | 14, 15 | syl6 33 | . . . 4 ⊢ ((𝐴 ⊆ ℂ ∧ 𝑥 ∈ 𝐴) → (𝐹 ∈ ((((MetOpen‘(abs ∘ − )) ↾t 𝐴) CnP (MetOpen‘(abs ∘ − )))‘𝑥) → (𝐹‘𝑥) ∈ (𝐹 limℂ 𝑥))) |
17 | 16 | ralimdva 2533 | . . 3 ⊢ (𝐴 ⊆ ℂ → (∀𝑥 ∈ 𝐴 𝐹 ∈ ((((MetOpen‘(abs ∘ − )) ↾t 𝐴) CnP (MetOpen‘(abs ∘ − )))‘𝑥) → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ (𝐹 limℂ 𝑥))) |
18 | 17 | anim2d 335 | . 2 ⊢ (𝐴 ⊆ ℂ → ((𝐹:𝐴⟶ℂ ∧ ∀𝑥 ∈ 𝐴 𝐹 ∈ ((((MetOpen‘(abs ∘ − )) ↾t 𝐴) CnP (MetOpen‘(abs ∘ − )))‘𝑥)) → (𝐹:𝐴⟶ℂ ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ (𝐹 limℂ 𝑥)))) |
19 | 13, 18 | sylbid 149 | 1 ⊢ (𝐴 ⊆ ℂ → (𝐹 ∈ (𝐴–cn→ℂ) → (𝐹:𝐴⟶ℂ ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ (𝐹 limℂ 𝑥)))) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 = wceq 1343 ∈ wcel 2136 ∀wral 2444 ⊆ wss 3116 ∘ ccom 4608 ⟶wf 5184 ‘cfv 5188 (class class class)co 5842 ℂcc 7751 − cmin 8069 abscabs 10939 ↾t crest 12556 MetOpencmopn 12625 TopOnctopon 12648 Cn ccn 12825 CnP ccnp 12826 –cn→ccncf 13197 limℂ climc 13263 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-coll 4097 ax-sep 4100 ax-nul 4108 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 ax-iinf 4565 ax-cnex 7844 ax-resscn 7845 ax-1cn 7846 ax-1re 7847 ax-icn 7848 ax-addcl 7849 ax-addrcl 7850 ax-mulcl 7851 ax-mulrcl 7852 ax-addcom 7853 ax-mulcom 7854 ax-addass 7855 ax-mulass 7856 ax-distr 7857 ax-i2m1 7858 ax-0lt1 7859 ax-1rid 7860 ax-0id 7861 ax-rnegex 7862 ax-precex 7863 ax-cnre 7864 ax-pre-ltirr 7865 ax-pre-ltwlin 7866 ax-pre-lttrn 7867 ax-pre-apti 7868 ax-pre-ltadd 7869 ax-pre-mulgt0 7870 ax-pre-mulext 7871 ax-arch 7872 ax-caucvg 7873 |
This theorem depends on definitions: df-bi 116 df-stab 821 df-dc 825 df-3or 969 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-nel 2432 df-ral 2449 df-rex 2450 df-reu 2451 df-rmo 2452 df-rab 2453 df-v 2728 df-sbc 2952 df-csb 3046 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-nul 3410 df-if 3521 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-int 3825 df-iun 3868 df-br 3983 df-opab 4044 df-mpt 4045 df-tr 4081 df-id 4271 df-po 4274 df-iso 4275 df-iord 4344 df-on 4346 df-ilim 4347 df-suc 4349 df-iom 4568 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-ima 4617 df-iota 5153 df-fun 5190 df-fn 5191 df-f 5192 df-f1 5193 df-fo 5194 df-f1o 5195 df-fv 5196 df-isom 5197 df-riota 5798 df-ov 5845 df-oprab 5846 df-mpo 5847 df-1st 6108 df-2nd 6109 df-recs 6273 df-frec 6359 df-map 6616 df-pm 6617 df-sup 6949 df-inf 6950 df-pnf 7935 df-mnf 7936 df-xr 7937 df-ltxr 7938 df-le 7939 df-sub 8071 df-neg 8072 df-reap 8473 df-ap 8480 df-div 8569 df-inn 8858 df-2 8916 df-3 8917 df-4 8918 df-n0 9115 df-z 9192 df-uz 9467 df-q 9558 df-rp 9590 df-xneg 9708 df-xadd 9709 df-seqfrec 10381 df-exp 10455 df-cj 10784 df-re 10785 df-im 10786 df-rsqrt 10940 df-abs 10941 df-rest 12558 df-topgen 12577 df-psmet 12627 df-xmet 12628 df-met 12629 df-bl 12630 df-mopn 12631 df-top 12636 df-topon 12649 df-bases 12681 df-cn 12828 df-cnp 12829 df-cncf 13198 df-limced 13265 |
This theorem is referenced by: cnlimci 13282 |
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