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| Mirrors > Home > MPE Home > Th. List > limcmpt | Structured version Visualization version GIF version | ||
| Description: Express the limit operator for a function defined by a mapping. (Contributed by Mario Carneiro, 25-Dec-2016.) |
| Ref | Expression |
|---|---|
| limcmpt.a | ⊢ (𝜑 → 𝐴 ⊆ ℂ) |
| limcmpt.b | ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| limcmpt.f | ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐴) → 𝐷 ∈ ℂ) |
| limcmpt.j | ⊢ 𝐽 = (𝐾 ↾t (𝐴 ∪ {𝐵})) |
| limcmpt.k | ⊢ 𝐾 = (TopOpen‘ℂfld) |
| Ref | Expression |
|---|---|
| limcmpt | ⊢ (𝜑 → (𝐶 ∈ ((𝑧 ∈ 𝐴 ↦ 𝐷) limℂ 𝐵) ↔ (𝑧 ∈ (𝐴 ∪ {𝐵}) ↦ if(𝑧 = 𝐵, 𝐶, 𝐷)) ∈ ((𝐽 CnP 𝐾)‘𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | limcmpt.j | . . 3 ⊢ 𝐽 = (𝐾 ↾t (𝐴 ∪ {𝐵})) | |
| 2 | limcmpt.k | . . 3 ⊢ 𝐾 = (TopOpen‘ℂfld) | |
| 3 | nfcv 2925 | . . . 4 ⊢ Ⅎ𝑦if(𝑧 = 𝐵, 𝐶, ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧)) | |
| 4 | nfv 1944 | . . . . 5 ⊢ Ⅎ𝑧 𝑦 = 𝐵 | |
| 5 | nfcv 2925 | . . . . 5 ⊢ Ⅎ𝑧𝐶 | |
| 6 | nffvmpt1 6894 | . . . . 5 ⊢ Ⅎ𝑧((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑦) | |
| 7 | 4, 5, 6 | nfif 4519 | . . . 4 ⊢ Ⅎ𝑧if(𝑦 = 𝐵, 𝐶, ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑦)) |
| 8 | eqeq1 2767 | . . . . 5 ⊢ (𝑧 = 𝑦 → (𝑧 = 𝐵 ↔ 𝑦 = 𝐵)) | |
| 9 | fveq2 6883 | . . . . 5 ⊢ (𝑧 = 𝑦 → ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧) = ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑦)) | |
| 10 | 8, 9 | ifbieq2d 4515 | . . . 4 ⊢ (𝑧 = 𝑦 → if(𝑧 = 𝐵, 𝐶, ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧)) = if(𝑦 = 𝐵, 𝐶, ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑦))) |
| 11 | 3, 7, 10 | cbvmpt 5214 | . . 3 ⊢ (𝑧 ∈ (𝐴 ∪ {𝐵}) ↦ if(𝑧 = 𝐵, 𝐶, ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧))) = (𝑦 ∈ (𝐴 ∪ {𝐵}) ↦ if(𝑦 = 𝐵, 𝐶, ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑦))) |
| 12 | limcmpt.f | . . . 4 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐴) → 𝐷 ∈ ℂ) | |
| 13 | 12 | fmpttd 7112 | . . 3 ⊢ (𝜑 → (𝑧 ∈ 𝐴 ↦ 𝐷):𝐴⟶ℂ) |
| 14 | limcmpt.a | . . 3 ⊢ (𝜑 → 𝐴 ⊆ ℂ) | |
| 15 | limcmpt.b | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℂ) | |
| 16 | 1, 2, 11, 13, 14, 15 | ellimc 26013 | . 2 ⊢ (𝜑 → (𝐶 ∈ ((𝑧 ∈ 𝐴 ↦ 𝐷) limℂ 𝐵) ↔ (𝑧 ∈ (𝐴 ∪ {𝐵}) ↦ if(𝑧 = 𝐵, 𝐶, ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧))) ∈ ((𝐽 CnP 𝐾)‘𝐵))) |
| 17 | elun 4108 | . . . . . . . . 9 ⊢ (𝑧 ∈ (𝐴 ∪ {𝐵}) ↔ (𝑧 ∈ 𝐴 ∨ 𝑧 ∈ {𝐵})) | |
| 18 | velsn 4606 | . . . . . . . . . 10 ⊢ (𝑧 ∈ {𝐵} ↔ 𝑧 = 𝐵) | |
| 19 | 18 | orbi2i 925 | . . . . . . . . 9 ⊢ ((𝑧 ∈ 𝐴 ∨ 𝑧 ∈ {𝐵}) ↔ (𝑧 ∈ 𝐴 ∨ 𝑧 = 𝐵)) |
| 20 | 17, 19 | bitri 278 | . . . . . . . 8 ⊢ (𝑧 ∈ (𝐴 ∪ {𝐵}) ↔ (𝑧 ∈ 𝐴 ∨ 𝑧 = 𝐵)) |
| 21 | pm5.61 1016 | . . . . . . . . 9 ⊢ (((𝑧 ∈ 𝐴 ∨ 𝑧 = 𝐵) ∧ ¬ 𝑧 = 𝐵) ↔ (𝑧 ∈ 𝐴 ∧ ¬ 𝑧 = 𝐵)) | |
| 22 | 21 | simplbi 501 | . . . . . . . 8 ⊢ (((𝑧 ∈ 𝐴 ∨ 𝑧 = 𝐵) ∧ ¬ 𝑧 = 𝐵) → 𝑧 ∈ 𝐴) |
| 23 | 20, 22 | sylanb 592 | . . . . . . 7 ⊢ ((𝑧 ∈ (𝐴 ∪ {𝐵}) ∧ ¬ 𝑧 = 𝐵) → 𝑧 ∈ 𝐴) |
| 24 | 23, 12 | sylan2 604 | . . . . . . 7 ⊢ ((𝜑 ∧ (𝑧 ∈ (𝐴 ∪ {𝐵}) ∧ ¬ 𝑧 = 𝐵)) → 𝐷 ∈ ℂ) |
| 25 | eqid 2763 | . . . . . . . 8 ⊢ (𝑧 ∈ 𝐴 ↦ 𝐷) = (𝑧 ∈ 𝐴 ↦ 𝐷) | |
| 26 | 25 | fvmpt2 7003 | . . . . . . 7 ⊢ ((𝑧 ∈ 𝐴 ∧ 𝐷 ∈ ℂ) → ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧) = 𝐷) |
| 27 | 23, 24, 26 | syl2an2 698 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑧 ∈ (𝐴 ∪ {𝐵}) ∧ ¬ 𝑧 = 𝐵)) → ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧) = 𝐷) |
| 28 | 27 | anassrs 472 | . . . . 5 ⊢ (((𝜑 ∧ 𝑧 ∈ (𝐴 ∪ {𝐵})) ∧ ¬ 𝑧 = 𝐵) → ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧) = 𝐷) |
| 29 | 28 | ifeq2da 4521 | . . . 4 ⊢ ((𝜑 ∧ 𝑧 ∈ (𝐴 ∪ {𝐵})) → if(𝑧 = 𝐵, 𝐶, ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧)) = if(𝑧 = 𝐵, 𝐶, 𝐷)) |
| 30 | 29 | mpteq2dva 5205 | . . 3 ⊢ (𝜑 → (𝑧 ∈ (𝐴 ∪ {𝐵}) ↦ if(𝑧 = 𝐵, 𝐶, ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧))) = (𝑧 ∈ (𝐴 ∪ {𝐵}) ↦ if(𝑧 = 𝐵, 𝐶, 𝐷))) |
| 31 | 30 | eleq1d 2848 | . 2 ⊢ (𝜑 → ((𝑧 ∈ (𝐴 ∪ {𝐵}) ↦ if(𝑧 = 𝐵, 𝐶, ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧))) ∈ ((𝐽 CnP 𝐾)‘𝐵) ↔ (𝑧 ∈ (𝐴 ∪ {𝐵}) ↦ if(𝑧 = 𝐵, 𝐶, 𝐷)) ∈ ((𝐽 CnP 𝐾)‘𝐵))) |
| 32 | 16, 31 | bitrd 282 | 1 ⊢ (𝜑 → (𝐶 ∈ ((𝑧 ∈ 𝐴 ↦ 𝐷) limℂ 𝐵) ↔ (𝑧 ∈ (𝐴 ∪ {𝐵}) ↦ if(𝑧 = 𝐵, 𝐶, 𝐷)) ∈ ((𝐽 CnP 𝐾)‘𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 400 ∨ wo 860 = wceq 1570 ∈ wcel 2143 ∪ cun 3904 ⊆ wss 3906 ifcif 4488 {csn 4590 ↦ cmpt 5193 ‘cfv 6538 (class class class)co 7412 ℂcc 11099 ↾t crest 17474 TopOpenctopn 17475 ℂfldccnfld 21503 CnP ccnp 23363 limℂ climc 26002 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5239 ax-sep 5258 ax-nul 5270 ax-pow 5338 ax-pr 5406 ax-un 7734 ax-cnex 11157 ax-resscn 11158 ax-1cn 11159 ax-icn 11160 ax-addcl 11161 ax-addrcl 11162 ax-mulcl 11163 ax-mulrcl 11164 ax-mulcom 11165 ax-addass 11166 ax-mulass 11167 ax-distr 11168 ax-i2m1 11169 ax-1ne0 11170 ax-1rid 11171 ax-rnegex 11172 ax-rrecex 11173 ax-cnre 11174 ax-pre-lttri 11175 ax-pre-lttrn 11176 ax-pre-ltadd 11177 ax-pre-mulgt0 11178 ax-pre-sup 11179 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-tp 4595 df-op 4597 df-uni 4874 df-int 4914 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7864 df-1st 7987 df-2nd 7988 df-frecs 8279 df-wrecs 8310 df-recs 8359 df-rdg 8398 df-1o 8454 df-er 8695 df-map 8827 df-pm 8828 df-en 8945 df-dom 8946 df-sdom 8947 df-fin 8948 df-fi 9372 df-sup 9403 df-inf 9404 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11444 df-neg 11445 df-div 11873 df-nn 12235 df-2 12304 df-3 12305 df-4 12306 df-5 12307 df-6 12308 df-7 12309 df-8 12310 df-9 12311 df-n0 12506 df-z 12593 df-dec 12713 df-uz 12864 df-q 12974 df-rp 13018 df-xneg 13138 df-xadd 13139 df-xmul 13140 df-fz 13537 df-seq 14040 df-exp 14100 df-cj 15152 df-re 15153 df-im 15154 df-sqrt 15288 df-abs 15289 df-struct 17208 df-slot 17243 df-ndx 17255 df-base 17271 df-plusg 17324 df-mulr 17325 df-starv 17326 df-tset 17330 df-ple 17331 df-ds 17333 df-unif 17334 df-rest 17476 df-topn 17477 df-topgen 17497 df-psmet 21495 df-xmet 21496 df-met 21497 df-bl 21498 df-mopn 21499 df-cnfld 21504 df-top 23032 df-topon 23049 df-topsp 23071 df-bases 23084 df-cnp 23366 df-xms 24458 df-ms 24459 df-limc 26006 |
| This theorem is referenced by: limcmpt2 26024 limccnp2 26032 limcco 26033 |
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