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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 2922 | . . . 4 ⊢ Ⅎ𝑦if(𝑧 = 𝐵, 𝐶, ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧)) | |
| 4 | nfv 1946 | . . . . 5 ⊢ Ⅎ𝑧 𝑦 = 𝐵 | |
| 5 | nfcv 2922 | . . . . 5 ⊢ Ⅎ𝑧𝐶 | |
| 6 | nffvmpt1 6896 | . . . . 5 ⊢ Ⅎ𝑧((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑦) | |
| 7 | 4, 5, 6 | nfif 4512 | . . . 4 ⊢ Ⅎ𝑧if(𝑦 = 𝐵, 𝐶, ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑦)) |
| 8 | eqeq1 2764 | . . . . 5 ⊢ (𝑧 = 𝑦 → (𝑧 = 𝐵 ↔ 𝑦 = 𝐵)) | |
| 9 | fveq2 6885 | . . . . 5 ⊢ (𝑧 = 𝑦 → ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧) = ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑦)) | |
| 10 | 8, 9 | ifbieq2d 4508 | . . . 4 ⊢ (𝑧 = 𝑦 → if(𝑧 = 𝐵, 𝐶, ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧)) = if(𝑦 = 𝐵, 𝐶, ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑦))) |
| 11 | 3, 7, 10 | cbvmpt 5206 | . . 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 7115 | . . 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 26198 | . 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 4152 | . . . . . . . . 9 ⊢ (𝑧 ∈ (𝐴 ∪ {𝐵}) ↔ (𝑧 ∈ 𝐴 ∨ 𝑧 ∈ {𝐵})) | |
| 18 | velsn 4596 | . . . . . . . . . 10 ⊢ (𝑧 ∈ {𝐵} ↔ 𝑧 = 𝐵) | |
| 19 | 18 | orbi2i 926 | . . . . . . . . 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 502 | . . . . . . . 8 ⊢ (((𝑧 ∈ 𝐴 ∨ 𝑧 = 𝐵) ∧ ¬ 𝑧 = 𝐵) → 𝑧 ∈ 𝐴) |
| 23 | 20, 22 | sylanb 593 | . . . . . . 7 ⊢ ((𝑧 ∈ (𝐴 ∪ {𝐵}) ∧ ¬ 𝑧 = 𝐵) → 𝑧 ∈ 𝐴) |
| 24 | 23, 12 | sylan2 605 | . . . . . . 7 ⊢ ((𝜑 ∧ (𝑧 ∈ (𝐴 ∪ {𝐵}) ∧ ¬ 𝑧 = 𝐵)) → 𝐷 ∈ ℂ) |
| 25 | eqid 2760 | . . . . . . . 8 ⊢ (𝑧 ∈ 𝐴 ↦ 𝐷) = (𝑧 ∈ 𝐴 ↦ 𝐷) | |
| 26 | 25 | fvmpt2 7005 | . . . . . . 7 ⊢ ((𝑧 ∈ 𝐴 ∧ 𝐷 ∈ ℂ) → ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧) = 𝐷) |
| 27 | 23, 24, 26 | syl2an2 699 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑧 ∈ (𝐴 ∪ {𝐵}) ∧ ¬ 𝑧 = 𝐵)) → ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧) = 𝐷) |
| 28 | 27 | anassrs 473 | . . . . 5 ⊢ (((𝜑 ∧ 𝑧 ∈ (𝐴 ∪ {𝐵})) ∧ ¬ 𝑧 = 𝐵) → ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧) = 𝐷) |
| 29 | 28 | ifeq2da 4514 | . . . 4 ⊢ ((𝜑 ∧ 𝑧 ∈ (𝐴 ∪ {𝐵})) → if(𝑧 = 𝐵, 𝐶, ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧)) = if(𝑧 = 𝐵, 𝐶, 𝐷)) |
| 30 | 29 | mpteq2dva 5197 | . . 3 ⊢ (𝜑 → (𝑧 ∈ (𝐴 ∪ {𝐵}) ↦ if(𝑧 = 𝐵, 𝐶, ((𝑧 ∈ 𝐴 ↦ 𝐷)‘𝑧))) = (𝑧 ∈ (𝐴 ∪ {𝐵}) ↦ if(𝑧 = 𝐵, 𝐶, 𝐷))) |
| 31 | 30 | eleq1d 2845 | . 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 |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 401 ∨ wo 861 = wceq 1569 ∈ wcel 2144 ⊆ wss 3895 ∪ cun 4149 ifcif 4481 {csn 4584 ↦ cmpt 5185 ‘cfv 6538 (class class class)co 7420 ℂcc 11201 ↾t crest 17596 TopOpenctopn 17597 ℂfldccnfld 21683 CnP ccnp 23548 limℂ climc 26187 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-cnex 11259 ax-resscn 11260 ax-1cn 11261 ax-icn 11262 ax-addcl 11263 ax-addrcl 11264 ax-mulcl 11265 ax-mulrcl 11266 ax-mulcom 11267 ax-addass 11268 ax-mulass 11269 ax-distr 11270 ax-i2m1 11271 ax-1ne0 11272 ax-1rid 11273 ax-rnegex 11274 ax-rrecex 11275 ax-cnre 11276 ax-pre-lttri 11277 ax-pre-lttrn 11278 ax-pre-ltadd 11279 ax-pre-mulgt0 11280 ax-pre-sup 11281 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4835 df-uni 4867 df-int 4907 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 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 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-1st 8001 df-2nd 8002 df-frecs 8302 df-wrecs 8333 df-recs 8382 df-rdg 8421 df-1o 8479 df-er 8720 df-map 8852 df-pm 8853 df-en 8977 df-dom 8978 df-sdom 8979 df-fin 8980 df-fi 9406 df-sup 9437 df-inf 9438 df-pnf 11348 df-mnf 11349 df-xr 11350 df-ltxr 11351 df-le 11352 df-sub 11546 df-neg 11547 df-div 11977 df-nn 12339 df-2 12408 df-3 12409 df-4 12410 df-5 12411 df-6 12412 df-7 12413 df-8 12414 df-9 12415 df-n0 12610 df-z 12697 df-dec 12818 df-uz 12969 df-q 13079 df-rp 13124 df-xneg 13244 df-xadd 13245 df-xmul 13246 df-fz 13643 df-seq 14148 df-exp 14208 df-cj 15271 df-re 15272 df-im 15273 df-sqrt 15407 df-abs 15408 df-struct 17330 df-slot 17365 df-ndx 17377 df-base 17393 df-plusg 17446 df-mulr 17447 df-starv 17448 df-tset 17452 df-ple 17453 df-ds 17455 df-unif 17456 df-rest 17598 df-topn 17599 df-topgen 17619 df-psmet 21675 df-xmet 21676 df-met 21677 df-bl 21678 df-mopn 21679 df-cnfld 21684 df-top 23217 df-topon 23234 df-topsp 23256 df-bases 23269 df-cnp 23551 df-xms 24644 df-ms 24645 df-limc 26191 |
| This theorem is used by: limcmpt2 26209 limccnp2 26217 limcco 26218 |
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