| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > limcmpt2 | 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 |
|---|---|
| limcmpt2.a | ⊢ (𝜑 → 𝐴 ⊆ ℂ) |
| limcmpt2.b | ⊢ (𝜑 → 𝐵 ∈ 𝐴) |
| limcmpt2.f | ⊢ ((𝜑 ∧ (𝑧 ∈ 𝐴 ∧ 𝑧 ≠ 𝐵)) → 𝐷 ∈ ℂ) |
| limcmpt2.j | ⊢ 𝐽 = (𝐾 ↾t 𝐴) |
| limcmpt2.k | ⊢ 𝐾 = (TopOpen‘ℂfld) |
| Ref | Expression |
|---|---|
| limcmpt2 | ⊢ (𝜑 → (𝐶 ∈ ((𝑧 ∈ (𝐴 ∖ {𝐵}) ↦ 𝐷) limℂ 𝐵) ↔ (𝑧 ∈ 𝐴 ↦ if(𝑧 = 𝐵, 𝐶, 𝐷)) ∈ ((𝐽 CnP 𝐾)‘𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | limcmpt2.a | . . . 4 ⊢ (𝜑 → 𝐴 ⊆ ℂ) | |
| 2 | 1 | ssdifssd 4094 | . . 3 ⊢ (𝜑 → (𝐴 ∖ {𝐵}) ⊆ ℂ) |
| 3 | limcmpt2.b | . . . 4 ⊢ (𝜑 → 𝐵 ∈ 𝐴) | |
| 4 | 1, 3 | sseldd 3932 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| 5 | eldifsn 4748 | . . . 4 ⊢ (𝑧 ∈ (𝐴 ∖ {𝐵}) ↔ (𝑧 ∈ 𝐴 ∧ 𝑧 ≠ 𝐵)) | |
| 6 | limcmpt2.f | . . . 4 ⊢ ((𝜑 ∧ (𝑧 ∈ 𝐴 ∧ 𝑧 ≠ 𝐵)) → 𝐷 ∈ ℂ) | |
| 7 | 5, 6 | sylan2b 606 | . . 3 ⊢ ((𝜑 ∧ 𝑧 ∈ (𝐴 ∖ {𝐵})) → 𝐷 ∈ ℂ) |
| 8 | eqid 2761 | . . 3 ⊢ (𝐾 ↾t ((𝐴 ∖ {𝐵}) ∪ {𝐵})) = (𝐾 ↾t ((𝐴 ∖ {𝐵}) ∪ {𝐵})) | |
| 9 | limcmpt2.k | . . 3 ⊢ 𝐾 = (TopOpen‘ℂfld) | |
| 10 | 2, 4, 7, 8, 9 | limcmpt 26183 | . 2 ⊢ (𝜑 → (𝐶 ∈ ((𝑧 ∈ (𝐴 ∖ {𝐵}) ↦ 𝐷) limℂ 𝐵) ↔ (𝑧 ∈ ((𝐴 ∖ {𝐵}) ∪ {𝐵}) ↦ if(𝑧 = 𝐵, 𝐶, 𝐷)) ∈ (((𝐾 ↾t ((𝐴 ∖ {𝐵}) ∪ {𝐵})) CnP 𝐾)‘𝐵))) |
| 11 | undif1 4430 | . . . . 5 ⊢ ((𝐴 ∖ {𝐵}) ∪ {𝐵}) = (𝐴 ∪ {𝐵}) | |
| 12 | 3 | snssd 4747 | . . . . . 6 ⊢ (𝜑 → {𝐵} ⊆ 𝐴) |
| 13 | ssequn2 4135 | . . . . . 6 ⊢ ({𝐵} ⊆ 𝐴 ↔ (𝐴 ∪ {𝐵}) = 𝐴) | |
| 14 | 12, 13 | sylib 221 | . . . . 5 ⊢ (𝜑 → (𝐴 ∪ {𝐵}) = 𝐴) |
| 15 | 11, 14 | eqtrid 2808 | . . . 4 ⊢ (𝜑 → ((𝐴 ∖ {𝐵}) ∪ {𝐵}) = 𝐴) |
| 16 | 15 | mpteq1d 5195 | . . 3 ⊢ (𝜑 → (𝑧 ∈ ((𝐴 ∖ {𝐵}) ∪ {𝐵}) ↦ if(𝑧 = 𝐵, 𝐶, 𝐷)) = (𝑧 ∈ 𝐴 ↦ if(𝑧 = 𝐵, 𝐶, 𝐷))) |
| 17 | 15 | oveq2d 7428 | . . . . . 6 ⊢ (𝜑 → (𝐾 ↾t ((𝐴 ∖ {𝐵}) ∪ {𝐵})) = (𝐾 ↾t 𝐴)) |
| 18 | limcmpt2.j | . . . . . 6 ⊢ 𝐽 = (𝐾 ↾t 𝐴) | |
| 19 | 17, 18 | eqtr4di 2814 | . . . . 5 ⊢ (𝜑 → (𝐾 ↾t ((𝐴 ∖ {𝐵}) ∪ {𝐵})) = 𝐽) |
| 20 | 19 | oveq1d 7427 | . . . 4 ⊢ (𝜑 → ((𝐾 ↾t ((𝐴 ∖ {𝐵}) ∪ {𝐵})) CnP 𝐾) = (𝐽 CnP 𝐾)) |
| 21 | 20 | fveq1d 6879 | . . 3 ⊢ (𝜑 → (((𝐾 ↾t ((𝐴 ∖ {𝐵}) ∪ {𝐵})) CnP 𝐾)‘𝐵) = ((𝐽 CnP 𝐾)‘𝐵)) |
| 22 | 16, 21 | eleq12d 2855 | . 2 ⊢ (𝜑 → ((𝑧 ∈ ((𝐴 ∖ {𝐵}) ∪ {𝐵}) ↦ if(𝑧 = 𝐵, 𝐶, 𝐷)) ∈ (((𝐾 ↾t ((𝐴 ∖ {𝐵}) ∪ {𝐵})) CnP 𝐾)‘𝐵) ↔ (𝑧 ∈ 𝐴 ↦ if(𝑧 = 𝐵, 𝐶, 𝐷)) ∈ ((𝐽 CnP 𝐾)‘𝐵))) |
| 23 | 10, 22 | bitrd 282 | 1 ⊢ (𝜑 → (𝐶 ∈ ((𝑧 ∈ (𝐴 ∖ {𝐵}) ↦ 𝐷) limℂ 𝐵) ↔ (𝑧 ∈ 𝐴 ↦ if(𝑧 = 𝐵, 𝐶, 𝐷)) ∈ ((𝐽 CnP 𝐾)‘𝐵))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ≠ wne 2956 ∖ cdif 3896 ∪ cun 3897 ⊆ wss 3899 ifcif 4482 {csn 4584 ↦ cmpt 5186 ‘cfv 6531 (class class class)co 7412 ℂcc 11179 ↾t crest 17571 TopOpenctopn 17572 ℂfldccnfld 21658 CnP ccnp 23523 limℂ climc 26162 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7740 ax-cnex 11237 ax-resscn 11238 ax-1cn 11239 ax-icn 11240 ax-addcl 11241 ax-addrcl 11242 ax-mulcl 11243 ax-mulrcl 11244 ax-mulcom 11245 ax-addass 11246 ax-mulass 11247 ax-distr 11248 ax-i2m1 11249 ax-1ne0 11250 ax-1rid 11251 ax-rnegex 11252 ax-rrecex 11253 ax-cnre 11254 ax-pre-lttri 11255 ax-pre-lttrn 11256 ax-pre-ltadd 11257 ax-pre-mulgt0 11258 ax-pre-sup 11259 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6297 df-ord 6358 df-on 6359 df-lim 6360 df-suc 6361 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7867 df-1st 7990 df-2nd 7991 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-1o 8460 df-er 8701 df-map 8833 df-pm 8834 df-en 8958 df-dom 8959 df-sdom 8960 df-fin 8961 df-fi 9387 df-sup 9418 df-inf 9419 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-sub 11524 df-neg 11525 df-div 11955 df-nn 12317 df-2 12386 df-3 12387 df-4 12388 df-5 12389 df-6 12390 df-7 12391 df-8 12392 df-9 12393 df-n0 12588 df-z 12675 df-dec 12796 df-uz 12947 df-q 13057 df-rp 13102 df-xneg 13222 df-xadd 13223 df-xmul 13224 df-fz 13621 df-seq 14125 df-exp 14185 df-cj 15246 df-re 15247 df-im 15248 df-sqrt 15382 df-abs 15383 df-struct 17305 df-slot 17340 df-ndx 17352 df-base 17368 df-plusg 17421 df-mulr 17422 df-starv 17423 df-tset 17427 df-ple 17428 df-ds 17430 df-unif 17431 df-rest 17573 df-topn 17574 df-topgen 17594 df-psmet 21650 df-xmet 21651 df-met 21652 df-bl 21653 df-mopn 21654 df-cnfld 21659 df-top 23192 df-topon 23209 df-topsp 23231 df-bases 23244 df-cnp 23526 df-xms 24619 df-ms 24620 df-limc 26166 |
| This theorem is used by: dvcnp 26219 |
| Copyright terms: Public domain | W3C validator |