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| Mirrors > Home > MPE Home > Th. List > cnlimci | Structured version Visualization version GIF version | ||
| Description: If 𝐹 is a continuous function, then the limit of the function at any point equals its value. (Contributed by Mario Carneiro, 28-Dec-2016.) |
| Ref | Expression |
|---|---|
| cnlimci.f | ⊢ (𝜑 → 𝐹 ∈ (𝐴–cn→𝐷)) |
| cnlimci.c | ⊢ (𝜑 → 𝐵 ∈ 𝐴) |
| Ref | Expression |
|---|---|
| cnlimci | ⊢ (𝜑 → (𝐹‘𝐵) ∈ (𝐹 limℂ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fveq2 6832 | . . 3 ⊢ (𝑥 = 𝐵 → (𝐹‘𝑥) = (𝐹‘𝐵)) | |
| 2 | oveq2 7364 | . . 3 ⊢ (𝑥 = 𝐵 → (𝐹 limℂ 𝑥) = (𝐹 limℂ 𝐵)) | |
| 3 | 1, 2 | eleq12d 2828 | . 2 ⊢ (𝑥 = 𝐵 → ((𝐹‘𝑥) ∈ (𝐹 limℂ 𝑥) ↔ (𝐹‘𝐵) ∈ (𝐹 limℂ 𝐵))) |
| 4 | cnlimci.f | . . . 4 ⊢ (𝜑 → 𝐹 ∈ (𝐴–cn→𝐷)) | |
| 5 | cncfrss 24838 | . . . 4 ⊢ (𝐹 ∈ (𝐴–cn→𝐷) → 𝐴 ⊆ ℂ) | |
| 6 | 4, 5 | syl 17 | . . 3 ⊢ (𝜑 → 𝐴 ⊆ ℂ) |
| 7 | cncfrss2 24839 | . . . . . 6 ⊢ (𝐹 ∈ (𝐴–cn→𝐷) → 𝐷 ⊆ ℂ) | |
| 8 | 4, 7 | syl 17 | . . . . 5 ⊢ (𝜑 → 𝐷 ⊆ ℂ) |
| 9 | ssid 3954 | . . . . 5 ⊢ ℂ ⊆ ℂ | |
| 10 | cncfss 24846 | . . . . 5 ⊢ ((𝐷 ⊆ ℂ ∧ ℂ ⊆ ℂ) → (𝐴–cn→𝐷) ⊆ (𝐴–cn→ℂ)) | |
| 11 | 8, 9, 10 | sylancl 586 | . . . 4 ⊢ (𝜑 → (𝐴–cn→𝐷) ⊆ (𝐴–cn→ℂ)) |
| 12 | 11, 4 | sseldd 3932 | . . 3 ⊢ (𝜑 → 𝐹 ∈ (𝐴–cn→ℂ)) |
| 13 | cnlimc 25843 | . . . 4 ⊢ (𝐴 ⊆ ℂ → (𝐹 ∈ (𝐴–cn→ℂ) ↔ (𝐹:𝐴⟶ℂ ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ (𝐹 limℂ 𝑥)))) | |
| 14 | 13 | simplbda 499 | . . 3 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐹 ∈ (𝐴–cn→ℂ)) → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ (𝐹 limℂ 𝑥)) |
| 15 | 6, 12, 14 | syl2anc 584 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ (𝐹 limℂ 𝑥)) |
| 16 | cnlimci.c | . 2 ⊢ (𝜑 → 𝐵 ∈ 𝐴) | |
| 17 | 3, 15, 16 | rspcdva 3575 | 1 ⊢ (𝜑 → (𝐹‘𝐵) ∈ (𝐹 limℂ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 ∀wral 3049 ⊆ wss 3899 ⟶wf 6486 ‘cfv 6490 (class class class)co 7356 ℂcc 11022 –cn→ccncf 24823 limℂ climc 25817 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-rep 5222 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 ax-cnex 11080 ax-resscn 11081 ax-1cn 11082 ax-icn 11083 ax-addcl 11084 ax-addrcl 11085 ax-mulcl 11086 ax-mulrcl 11087 ax-mulcom 11088 ax-addass 11089 ax-mulass 11090 ax-distr 11091 ax-i2m1 11092 ax-1ne0 11093 ax-1rid 11094 ax-rnegex 11095 ax-rrecex 11096 ax-cnre 11097 ax-pre-lttri 11098 ax-pre-lttrn 11099 ax-pre-ltadd 11100 ax-pre-mulgt0 11101 ax-pre-sup 11102 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3059 df-rmo 3348 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-tp 4583 df-op 4585 df-uni 4862 df-int 4901 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-tr 5204 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7807 df-1st 7931 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-1o 8395 df-er 8633 df-map 8763 df-pm 8764 df-en 8882 df-dom 8883 df-sdom 8884 df-fin 8885 df-fi 9312 df-sup 9343 df-inf 9344 df-pnf 11166 df-mnf 11167 df-xr 11168 df-ltxr 11169 df-le 11170 df-sub 11364 df-neg 11365 df-div 11793 df-nn 12144 df-2 12206 df-3 12207 df-4 12208 df-5 12209 df-6 12210 df-7 12211 df-8 12212 df-9 12213 df-n0 12400 df-z 12487 df-dec 12606 df-uz 12750 df-q 12860 df-rp 12904 df-xneg 13024 df-xadd 13025 df-xmul 13026 df-fz 13422 df-seq 13923 df-exp 13983 df-cj 15020 df-re 15021 df-im 15022 df-sqrt 15156 df-abs 15157 df-struct 17072 df-slot 17107 df-ndx 17119 df-base 17135 df-plusg 17188 df-mulr 17189 df-starv 17190 df-tset 17194 df-ple 17195 df-ds 17197 df-unif 17198 df-rest 17340 df-topn 17341 df-topgen 17361 df-psmet 21299 df-xmet 21300 df-met 21301 df-bl 21302 df-mopn 21303 df-cnfld 21308 df-top 22836 df-topon 22853 df-topsp 22875 df-bases 22888 df-cn 23169 df-cnp 23170 df-xms 24262 df-ms 24263 df-cncf 24825 df-limc 25821 |
| This theorem is referenced by: cnmptlimc 25845 dvcnvlem 25934 ioccncflimc 46071 icocncflimc 46075 dirkercncflem2 46290 fourierdlem84 46376 fourierdlem85 46377 fourierdlem88 46380 fourierdlem111 46403 fouriercn 46418 |
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