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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 6882 | . . 3 ⊢ (𝑥 = 𝐵 → (𝐹‘𝑥) = (𝐹‘𝐵)) | |
| 2 | oveq2 7419 | . . 3 ⊢ (𝑥 = 𝐵 → (𝐹 limℂ 𝑥) = (𝐹 limℂ 𝐵)) | |
| 3 | 1, 2 | eleq12d 2863 | . 2 ⊢ (𝑥 = 𝐵 → ((𝐹‘𝑥) ∈ (𝐹 limℂ 𝑥) ↔ (𝐹‘𝐵) ∈ (𝐹 limℂ 𝐵))) |
| 4 | cnlimci.f | . . . 4 ⊢ (𝜑 → 𝐹 ∈ (𝐴–cn→𝐷)) | |
| 5 | cncfrss 25018 | . . . 4 ⊢ (𝐹 ∈ (𝐴–cn→𝐷) → 𝐴 ⊆ ℂ) | |
| 6 | 4, 5 | syl 18 | . . 3 ⊢ (𝜑 → 𝐴 ⊆ ℂ) |
| 7 | cncfrss2 25019 | . . . . . 6 ⊢ (𝐹 ∈ (𝐴–cn→𝐷) → 𝐷 ⊆ ℂ) | |
| 8 | 4, 7 | syl 18 | . . . . 5 ⊢ (𝜑 → 𝐷 ⊆ ℂ) |
| 9 | ssid 3967 | . . . . 5 ⊢ ℂ ⊆ ℂ | |
| 10 | cncfss 25026 | . . . . 5 ⊢ ((𝐷 ⊆ ℂ ∧ ℂ ⊆ ℂ) → (𝐴–cn→𝐷) ⊆ (𝐴–cn→ℂ)) | |
| 11 | 8, 9, 10 | sylancl 597 | . . . 4 ⊢ (𝜑 → (𝐴–cn→𝐷) ⊆ (𝐴–cn→ℂ)) |
| 12 | 11, 4 | sseldd 3946 | . . 3 ⊢ (𝜑 → 𝐹 ∈ (𝐴–cn→ℂ)) |
| 13 | cnlimc 26015 | . . . 4 ⊢ (𝐴 ⊆ ℂ → (𝐹 ∈ (𝐴–cn→ℂ) ↔ (𝐹:𝐴⟶ℂ ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ (𝐹 limℂ 𝑥)))) | |
| 14 | 13 | simplbda 504 | . . 3 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐹 ∈ (𝐴–cn→ℂ)) → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ (𝐹 limℂ 𝑥)) |
| 15 | 6, 12, 14 | syl2anc 595 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∈ (𝐹 limℂ 𝑥)) |
| 16 | cnlimci.c | . 2 ⊢ (𝜑 → 𝐵 ∈ 𝐴) | |
| 17 | 3, 15, 16 | rspcdva 3591 | 1 ⊢ (𝜑 → (𝐹‘𝐵) ∈ (𝐹 limℂ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1567 ∈ wcel 2149 ∀wral 3085 ⊆ wss 3913 ⟶wf 6533 ‘cfv 6537 (class class class)co 7411 ℂcc 11097 –cn→ccncf 25003 limℂ climc 25989 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5242 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 ax-cnex 11155 ax-resscn 11156 ax-1cn 11157 ax-icn 11158 ax-addcl 11159 ax-addrcl 11160 ax-mulcl 11161 ax-mulrcl 11162 ax-mulcom 11163 ax-addass 11164 ax-mulass 11165 ax-distr 11166 ax-i2m1 11167 ax-1ne0 11168 ax-1rid 11169 ax-rnegex 11170 ax-rrecex 11171 ax-cnre 11172 ax-pre-lttri 11173 ax-pre-lttrn 11174 ax-pre-ltadd 11175 ax-pre-mulgt0 11176 ax-pre-sup 11177 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 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-tp 4599 df-op 4601 df-uni 4877 df-int 4917 df-iun 4962 df-br 5114 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5557 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-we 5617 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7862 df-1st 7985 df-2nd 7986 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-rdg 8396 df-1o 8452 df-er 8693 df-map 8825 df-pm 8826 df-en 8943 df-dom 8944 df-sdom 8945 df-fin 8946 df-fi 9370 df-sup 9401 df-inf 9402 df-pnf 11244 df-mnf 11245 df-xr 11246 df-ltxr 11247 df-le 11248 df-sub 11442 df-neg 11443 df-div 11871 df-nn 12233 df-2 12302 df-3 12303 df-4 12304 df-5 12305 df-6 12306 df-7 12307 df-8 12308 df-9 12309 df-n0 12504 df-z 12591 df-dec 12711 df-uz 12862 df-q 12972 df-rp 13016 df-xneg 13136 df-xadd 13137 df-xmul 13138 df-fz 13535 df-seq 14037 df-exp 14097 df-cj 15149 df-re 15150 df-im 15151 df-sqrt 15285 df-abs 15286 df-struct 17206 df-slot 17241 df-ndx 17253 df-base 17269 df-plusg 17322 df-mulr 17323 df-starv 17324 df-tset 17328 df-ple 17329 df-ds 17331 df-unif 17332 df-rest 17474 df-topn 17475 df-topgen 17495 df-psmet 21482 df-xmet 21483 df-met 21484 df-bl 21485 df-mopn 21486 df-cnfld 21491 df-top 23019 df-topon 23036 df-topsp 23058 df-bases 23071 df-cn 23352 df-cnp 23353 df-xms 24445 df-ms 24446 df-cncf 25005 df-limc 25993 |
| This theorem is referenced by: cnmptlimc 26017 dvcnvlem 26103 ioccncflimc 46490 icocncflimc 46494 dirkercncflem2 46709 fourierdlem84 46795 fourierdlem85 46796 fourierdlem88 46799 fourierdlem111 46822 fouriercn 46837 |
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