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| Mirrors > Home > MPE Home > Th. List > limcmo | Structured version Visualization version GIF version | ||
| Description: If 𝐵 is a limit point of the domain of the function 𝐹, then there is at most one limit value of 𝐹 at 𝐵. (Contributed by Mario Carneiro, 25-Dec-2016.) |
| Ref | Expression |
|---|---|
| limcflf.f | ⊢ (𝜑 → 𝐹:𝐴⟶ℂ) |
| limcflf.a | ⊢ (𝜑 → 𝐴 ⊆ ℂ) |
| limcflf.b | ⊢ (𝜑 → 𝐵 ∈ ((limPt‘𝐾)‘𝐴)) |
| limcflf.k | ⊢ 𝐾 = (TopOpen‘ℂfld) |
| Ref | Expression |
|---|---|
| limcmo | ⊢ (𝜑 → ∃*𝑥 𝑥 ∈ (𝐹 limℂ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | limcflf.k | . . . 4 ⊢ 𝐾 = (TopOpen‘ℂfld) | |
| 2 | 1 | cnfldhaus 24694 | . . 3 ⊢ 𝐾 ∈ Haus |
| 3 | limcflf.f | . . . 4 ⊢ (𝜑 → 𝐹:𝐴⟶ℂ) | |
| 4 | limcflf.a | . . . 4 ⊢ (𝜑 → 𝐴 ⊆ ℂ) | |
| 5 | limcflf.b | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ((limPt‘𝐾)‘𝐴)) | |
| 6 | eqid 2731 | . . . 4 ⊢ (𝐴 ∖ {𝐵}) = (𝐴 ∖ {𝐵}) | |
| 7 | eqid 2731 | . . . 4 ⊢ (((nei‘𝐾)‘{𝐵}) ↾t (𝐴 ∖ {𝐵})) = (((nei‘𝐾)‘{𝐵}) ↾t (𝐴 ∖ {𝐵})) | |
| 8 | 3, 4, 5, 1, 6, 7 | limcflflem 25803 | . . 3 ⊢ (𝜑 → (((nei‘𝐾)‘{𝐵}) ↾t (𝐴 ∖ {𝐵})) ∈ (Fil‘(𝐴 ∖ {𝐵}))) |
| 9 | difss 4081 | . . . 4 ⊢ (𝐴 ∖ {𝐵}) ⊆ 𝐴 | |
| 10 | fssres 6684 | . . . 4 ⊢ ((𝐹:𝐴⟶ℂ ∧ (𝐴 ∖ {𝐵}) ⊆ 𝐴) → (𝐹 ↾ (𝐴 ∖ {𝐵})):(𝐴 ∖ {𝐵})⟶ℂ) | |
| 11 | 3, 9, 10 | sylancl 586 | . . 3 ⊢ (𝜑 → (𝐹 ↾ (𝐴 ∖ {𝐵})):(𝐴 ∖ {𝐵})⟶ℂ) |
| 12 | 1 | cnfldtopon 24692 | . . . . 5 ⊢ 𝐾 ∈ (TopOn‘ℂ) |
| 13 | 12 | toponunii 22826 | . . . 4 ⊢ ℂ = ∪ 𝐾 |
| 14 | 13 | hausflf 23907 | . . 3 ⊢ ((𝐾 ∈ Haus ∧ (((nei‘𝐾)‘{𝐵}) ↾t (𝐴 ∖ {𝐵})) ∈ (Fil‘(𝐴 ∖ {𝐵})) ∧ (𝐹 ↾ (𝐴 ∖ {𝐵})):(𝐴 ∖ {𝐵})⟶ℂ) → ∃*𝑥 𝑥 ∈ ((𝐾 fLimf (((nei‘𝐾)‘{𝐵}) ↾t (𝐴 ∖ {𝐵})))‘(𝐹 ↾ (𝐴 ∖ {𝐵})))) |
| 15 | 2, 8, 11, 14 | mp3an2i 1468 | . 2 ⊢ (𝜑 → ∃*𝑥 𝑥 ∈ ((𝐾 fLimf (((nei‘𝐾)‘{𝐵}) ↾t (𝐴 ∖ {𝐵})))‘(𝐹 ↾ (𝐴 ∖ {𝐵})))) |
| 16 | 3, 4, 5, 1, 6, 7 | limcflf 25804 | . . . 4 ⊢ (𝜑 → (𝐹 limℂ 𝐵) = ((𝐾 fLimf (((nei‘𝐾)‘{𝐵}) ↾t (𝐴 ∖ {𝐵})))‘(𝐹 ↾ (𝐴 ∖ {𝐵})))) |
| 17 | 16 | eleq2d 2817 | . . 3 ⊢ (𝜑 → (𝑥 ∈ (𝐹 limℂ 𝐵) ↔ 𝑥 ∈ ((𝐾 fLimf (((nei‘𝐾)‘{𝐵}) ↾t (𝐴 ∖ {𝐵})))‘(𝐹 ↾ (𝐴 ∖ {𝐵}))))) |
| 18 | 17 | mobidv 2544 | . 2 ⊢ (𝜑 → (∃*𝑥 𝑥 ∈ (𝐹 limℂ 𝐵) ↔ ∃*𝑥 𝑥 ∈ ((𝐾 fLimf (((nei‘𝐾)‘{𝐵}) ↾t (𝐴 ∖ {𝐵})))‘(𝐹 ↾ (𝐴 ∖ {𝐵}))))) |
| 19 | 15, 18 | mpbird 257 | 1 ⊢ (𝜑 → ∃*𝑥 𝑥 ∈ (𝐹 limℂ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2111 ∃*wmo 2533 ∖ cdif 3894 ⊆ wss 3897 {csn 4571 ↾ cres 5613 ⟶wf 6472 ‘cfv 6476 (class class class)co 7341 ℂcc 10999 ↾t crest 17319 TopOpenctopn 17320 ℂfldccnfld 21286 neicnei 23007 limPtclp 23044 Hauscha 23218 Filcfil 23755 fLimf cflf 23845 limℂ climc 25785 |
| 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 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-rep 5212 ax-sep 5229 ax-nul 5239 ax-pow 5298 ax-pr 5365 ax-un 7663 ax-cnex 11057 ax-resscn 11058 ax-1cn 11059 ax-icn 11060 ax-addcl 11061 ax-addrcl 11062 ax-mulcl 11063 ax-mulrcl 11064 ax-mulcom 11065 ax-addass 11066 ax-mulass 11067 ax-distr 11068 ax-i2m1 11069 ax-1ne0 11070 ax-1rid 11071 ax-rnegex 11072 ax-rrecex 11073 ax-cnre 11074 ax-pre-lttri 11075 ax-pre-lttrn 11076 ax-pre-ltadd 11077 ax-pre-mulgt0 11078 ax-pre-sup 11079 |
| 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 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-nel 3033 df-ral 3048 df-rex 3057 df-rmo 3346 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-csb 3846 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-pss 3917 df-nul 4279 df-if 4471 df-pw 4547 df-sn 4572 df-pr 4574 df-tp 4576 df-op 4578 df-uni 4855 df-int 4893 df-iun 4938 df-iin 4939 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5506 df-eprel 5511 df-po 5519 df-so 5520 df-fr 5564 df-we 5566 df-xp 5617 df-rel 5618 df-cnv 5619 df-co 5620 df-dm 5621 df-rn 5622 df-res 5623 df-ima 5624 df-pred 6243 df-ord 6304 df-on 6305 df-lim 6306 df-suc 6307 df-iota 6432 df-fun 6478 df-fn 6479 df-f 6480 df-f1 6481 df-fo 6482 df-f1o 6483 df-fv 6484 df-riota 7298 df-ov 7344 df-oprab 7345 df-mpo 7346 df-om 7792 df-1st 7916 df-2nd 7917 df-frecs 8206 df-wrecs 8237 df-recs 8286 df-rdg 8324 df-1o 8380 df-er 8617 df-map 8747 df-pm 8748 df-en 8865 df-dom 8866 df-sdom 8867 df-fin 8868 df-fi 9290 df-sup 9321 df-inf 9322 df-pnf 11143 df-mnf 11144 df-xr 11145 df-ltxr 11146 df-le 11147 df-sub 11341 df-neg 11342 df-div 11770 df-nn 12121 df-2 12183 df-3 12184 df-4 12185 df-5 12186 df-6 12187 df-7 12188 df-8 12189 df-9 12190 df-n0 12377 df-z 12464 df-dec 12584 df-uz 12728 df-q 12842 df-rp 12886 df-xneg 13006 df-xadd 13007 df-xmul 13008 df-icc 13247 df-fz 13403 df-seq 13904 df-exp 13964 df-cj 15001 df-re 15002 df-im 15003 df-sqrt 15137 df-abs 15138 df-struct 17053 df-slot 17088 df-ndx 17100 df-base 17116 df-plusg 17169 df-mulr 17170 df-starv 17171 df-tset 17175 df-ple 17176 df-ds 17178 df-unif 17179 df-rest 17321 df-topn 17322 df-topgen 17342 df-psmet 21278 df-xmet 21279 df-met 21280 df-bl 21281 df-mopn 21282 df-fbas 21283 df-fg 21284 df-cnfld 21287 df-top 22804 df-topon 22821 df-topsp 22843 df-bases 22856 df-cld 22929 df-ntr 22930 df-cls 22931 df-nei 23008 df-lp 23046 df-cnp 23138 df-haus 23225 df-fil 23756 df-fm 23848 df-flim 23849 df-flf 23850 df-xms 24230 df-ms 24231 df-limc 25789 |
| This theorem is referenced by: perfdvf 25826 ellimciota 45654 |
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