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| Mirrors > Home > MPE Home > Th. List > rlimcnp3 | Structured version Visualization version GIF version | ||
| Description: Relate a limit of a real-valued sequence at infinity to the continuity of the function 𝑆(𝑦) = 𝑅(1 / 𝑦) at zero. (Contributed by Mario Carneiro, 1-Mar-2015.) |
| Ref | Expression |
|---|---|
| rlimcnp3.c | ⊢ (𝜑 → 𝐶 ∈ ℂ) |
| rlimcnp3.r | ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ+) → 𝑆 ∈ ℂ) |
| rlimcnp3.s | ⊢ (𝑦 = (1 / 𝑥) → 𝑆 = 𝑅) |
| rlimcnp3.j | ⊢ 𝐽 = (TopOpen‘ℂfld) |
| rlimcnp3.k | ⊢ 𝐾 = (𝐽 ↾t (0[,)+∞)) |
| Ref | Expression |
|---|---|
| rlimcnp3 | ⊢ (𝜑 → ((𝑦 ∈ ℝ+ ↦ 𝑆) ⇝𝑟 𝐶 ↔ (𝑥 ∈ (0[,)+∞) ↦ if(𝑥 = 0, 𝐶, 𝑅)) ∈ ((𝐾 CnP 𝐽)‘0))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssidd 3936 | . 2 ⊢ (𝜑 → (0[,)+∞) ⊆ (0[,)+∞)) | |
| 2 | 0e0icopnf 13629 | . . 3 ⊢ 0 ∈ (0[,)+∞) | |
| 3 | 2 | a1i 11 | . 2 ⊢ (𝜑 → 0 ∈ (0[,)+∞)) |
| 4 | rpssre 13168 | . . 3 ⊢ ℝ+ ⊆ ℝ | |
| 5 | 4 | a1i 11 | . 2 ⊢ (𝜑 → ℝ+ ⊆ ℝ) |
| 6 | rlimcnp3.c | . 2 ⊢ (𝜑 → 𝐶 ∈ ℂ) | |
| 7 | rlimcnp3.r | . 2 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ+) → 𝑆 ∈ ℂ) | |
| 8 | simpr 490 | . . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ+) → 𝑦 ∈ ℝ+) | |
| 9 | rpreccl 13188 | . . . . . 6 ⊢ (𝑦 ∈ ℝ+ → (1 / 𝑦) ∈ ℝ+) | |
| 10 | 9 | adantl 487 | . . . . 5 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ+) → (1 / 𝑦) ∈ ℝ+) |
| 11 | 10 | rpred 13204 | . . . 4 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ+) → (1 / 𝑦) ∈ ℝ) |
| 12 | 10 | rpge0d 13208 | . . . 4 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ+) → 0 ≤ (1 / 𝑦)) |
| 13 | elrege0 13625 | . . . 4 ⊢ ((1 / 𝑦) ∈ (0[,)+∞) ↔ ((1 / 𝑦) ∈ ℝ ∧ 0 ≤ (1 / 𝑦))) | |
| 14 | 11, 12, 13 | sylanbrc 595 | . . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ+) → (1 / 𝑦) ∈ (0[,)+∞)) |
| 15 | 8, 14 | 2thd 268 | . 2 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ+) → (𝑦 ∈ ℝ+ ↔ (1 / 𝑦) ∈ (0[,)+∞))) |
| 16 | rlimcnp3.s | . 2 ⊢ (𝑦 = (1 / 𝑥) → 𝑆 = 𝑅) | |
| 17 | rlimcnp3.j | . 2 ⊢ 𝐽 = (TopOpen‘ℂfld) | |
| 18 | rlimcnp3.k | . 2 ⊢ 𝐾 = (𝐽 ↾t (0[,)+∞)) | |
| 19 | 1, 3, 5, 6, 7, 15, 16, 17, 18 | rlimcnp2 27351 | 1 ⊢ (𝜑 → ((𝑦 ∈ ℝ+ ↦ 𝑆) ⇝𝑟 𝐶 ↔ (𝑥 ∈ (0[,)+∞) ↦ if(𝑥 = 0, 𝐶, 𝑅)) ∈ ((𝐾 CnP 𝐽)‘0))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2147 ⊆ wss 3900 ifcif 4485 class class class wbr 5108 ↦ cmpt 5192 ‘cfv 6566 (class class class)co 7451 ℂcc 11237 ℝcr 11238 0cc0 11239 1c1 11240 +∞cpnf 11379 ≤ cle 11383 / cdiv 12013 ℝ+crp 13160 [,)cico 13518 ⇝𝑟 crli 15696 ↾t crest 17641 TopOpenctopn 17642 ℂfldccnfld 21729 CnP ccnp 23598 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5238 ax-sep 5255 ax-nul 5266 ax-pow 5334 ax-pr 5398 ax-un 7783 ax-cnex 11295 ax-resscn 11296 ax-1cn 11297 ax-icn 11298 ax-addcl 11299 ax-addrcl 11300 ax-mulcl 11301 ax-mulrcl 11302 ax-mulcom 11303 ax-addass 11304 ax-mulass 11305 ax-distr 11306 ax-i2m1 11307 ax-1ne0 11308 ax-1rid 11309 ax-rnegex 11310 ax-rrecex 11311 ax-cnre 11312 ax-pre-lttri 11313 ax-pre-lttrn 11314 ax-pre-ltadd 11315 ax-pre-mulgt0 11316 ax-pre-sup 11317 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-tp 4593 df-op 4841 df-uni 4873 df-iun 4958 df-br 5109 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-pred 6330 df-ord 6391 df-on 6392 df-lim 6393 df-suc 6394 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-riota 7408 df-ov 7454 df-oprab 7455 df-mpo 7456 df-om 7912 df-1st 8035 df-2nd 8036 df-frecs 8337 df-wrecs 8368 df-recs 8417 df-rdg 8456 df-1o 8514 df-er 8755 df-map 8887 df-pm 8888 df-en 9012 df-dom 9013 df-sdom 9014 df-fin 9015 df-sup 9471 df-inf 9472 df-pnf 11384 df-mnf 11385 df-xr 11386 df-ltxr 11387 df-le 11388 df-sub 11582 df-neg 11583 df-div 12014 df-nn 12376 df-2 12445 df-3 12446 df-4 12447 df-5 12448 df-6 12449 df-7 12450 df-8 12451 df-9 12452 df-n0 12647 df-z 12734 df-dec 12855 df-uz 13006 df-q 13116 df-rp 13161 df-xneg 13281 df-xadd 13282 df-xmul 13283 df-ioo 13520 df-ico 13522 df-fz 13680 df-seq 14185 df-exp 14245 df-cj 15309 df-re 15310 df-im 15311 df-sqrt 15445 df-abs 15446 df-rlim 15700 df-struct 17369 df-slot 17404 df-ndx 17416 df-base 17432 df-plusg 17486 df-mulr 17487 df-starv 17488 df-tset 17492 df-ple 17493 df-ds 17495 df-unif 17496 df-euf 17499 df-rest 17643 df-topn 17644 df-topgen 17664 df-psmet 21721 df-xmet 21722 df-met 21723 df-bl 21724 df-mopn 21725 df-cnfld 21730 df-top 23267 df-topon 23284 df-bases 23319 df-cnp 23601 |
| This theorem is used by: efrlim 27354 |
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