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| Mirrors > Home > MPE Home > Th. List > rlimi | Structured version Visualization version GIF version | ||
| Description: Convergence at infinity of a function on the reals. (Contributed by Mario Carneiro, 28-Feb-2015.) |
| Ref | Expression |
|---|---|
| rlimi.1 | ⊢ (𝜑 → ∀𝑧 ∈ 𝐴 𝐵 ∈ 𝑉) |
| rlimi.2 | ⊢ (𝜑 → 𝑅 ∈ ℝ+) |
| rlimi.3 | ⊢ (𝜑 → (𝑧 ∈ 𝐴 ↦ 𝐵) ⇝𝑟 𝐶) |
| Ref | Expression |
|---|---|
| rlimi | ⊢ (𝜑 → ∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 ≤ 𝑧 → (abs‘(𝐵 − 𝐶)) < 𝑅)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | breq2 5112 | . . . 4 ⊢ (𝑥 = 𝑅 → ((abs‘(𝐵 − 𝐶)) < 𝑥 ↔ (abs‘(𝐵 − 𝐶)) < 𝑅)) | |
| 2 | 1 | imbi2d 343 | . . 3 ⊢ (𝑥 = 𝑅 → ((𝑦 ≤ 𝑧 → (abs‘(𝐵 − 𝐶)) < 𝑥) ↔ (𝑦 ≤ 𝑧 → (abs‘(𝐵 − 𝐶)) < 𝑅))) |
| 3 | 2 | rexralbidv 3232 | . 2 ⊢ (𝑥 = 𝑅 → (∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 ≤ 𝑧 → (abs‘(𝐵 − 𝐶)) < 𝑥) ↔ ∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 ≤ 𝑧 → (abs‘(𝐵 − 𝐶)) < 𝑅))) |
| 4 | rlimi.3 | . . 3 ⊢ (𝜑 → (𝑧 ∈ 𝐴 ↦ 𝐵) ⇝𝑟 𝐶) | |
| 5 | rlimf 15712 | . . . . . . 7 ⊢ ((𝑧 ∈ 𝐴 ↦ 𝐵) ⇝𝑟 𝐶 → (𝑧 ∈ 𝐴 ↦ 𝐵):dom (𝑧 ∈ 𝐴 ↦ 𝐵)⟶ℂ) | |
| 6 | 4, 5 | syl 18 | . . . . . 6 ⊢ (𝜑 → (𝑧 ∈ 𝐴 ↦ 𝐵):dom (𝑧 ∈ 𝐴 ↦ 𝐵)⟶ℂ) |
| 7 | rlimi.1 | . . . . . . . . 9 ⊢ (𝜑 → ∀𝑧 ∈ 𝐴 𝐵 ∈ 𝑉) | |
| 8 | eqid 2763 | . . . . . . . . . 10 ⊢ (𝑧 ∈ 𝐴 ↦ 𝐵) = (𝑧 ∈ 𝐴 ↦ 𝐵) | |
| 9 | 8 | fmpt 7142 | . . . . . . . . 9 ⊢ (∀𝑧 ∈ 𝐴 𝐵 ∈ 𝑉 ↔ (𝑧 ∈ 𝐴 ↦ 𝐵):𝐴⟶𝑉) |
| 10 | 7, 9 | sylib 221 | . . . . . . . 8 ⊢ (𝜑 → (𝑧 ∈ 𝐴 ↦ 𝐵):𝐴⟶𝑉) |
| 11 | 10 | fdmd 6750 | . . . . . . 7 ⊢ (𝜑 → dom (𝑧 ∈ 𝐴 ↦ 𝐵) = 𝐴) |
| 12 | 11 | feq2d 6723 | . . . . . 6 ⊢ (𝜑 → ((𝑧 ∈ 𝐴 ↦ 𝐵):dom (𝑧 ∈ 𝐴 ↦ 𝐵)⟶ℂ ↔ (𝑧 ∈ 𝐴 ↦ 𝐵):𝐴⟶ℂ)) |
| 13 | 6, 12 | mpbid 235 | . . . . 5 ⊢ (𝜑 → (𝑧 ∈ 𝐴 ↦ 𝐵):𝐴⟶ℂ) |
| 14 | 8 | fmpt 7142 | . . . . 5 ⊢ (∀𝑧 ∈ 𝐴 𝐵 ∈ ℂ ↔ (𝑧 ∈ 𝐴 ↦ 𝐵):𝐴⟶ℂ) |
| 15 | 13, 14 | sylibr 237 | . . . 4 ⊢ (𝜑 → ∀𝑧 ∈ 𝐴 𝐵 ∈ ℂ) |
| 16 | rlimss 15713 | . . . . . 6 ⊢ ((𝑧 ∈ 𝐴 ↦ 𝐵) ⇝𝑟 𝐶 → dom (𝑧 ∈ 𝐴 ↦ 𝐵) ⊆ ℝ) | |
| 17 | 4, 16 | syl 18 | . . . . 5 ⊢ (𝜑 → dom (𝑧 ∈ 𝐴 ↦ 𝐵) ⊆ ℝ) |
| 18 | 11, 17 | eqsstrrd 3948 | . . . 4 ⊢ (𝜑 → 𝐴 ⊆ ℝ) |
| 19 | rlimcl 15714 | . . . . 5 ⊢ ((𝑧 ∈ 𝐴 ↦ 𝐵) ⇝𝑟 𝐶 → 𝐶 ∈ ℂ) | |
| 20 | 4, 19 | syl 18 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℂ) |
| 21 | 15, 18, 20 | rlim2 15707 | . . 3 ⊢ (𝜑 → ((𝑧 ∈ 𝐴 ↦ 𝐵) ⇝𝑟 𝐶 ↔ ∀𝑥 ∈ ℝ+ ∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 ≤ 𝑧 → (abs‘(𝐵 − 𝐶)) < 𝑥))) |
| 22 | 4, 21 | mpbid 235 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ ℝ+ ∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 ≤ 𝑧 → (abs‘(𝐵 − 𝐶)) < 𝑥)) |
| 23 | rlimi.2 | . 2 ⊢ (𝜑 → 𝑅 ∈ ℝ+) | |
| 24 | 3, 22, 23 | rspcdva 3581 | 1 ⊢ (𝜑 → ∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 ≤ 𝑧 → (abs‘(𝐵 − 𝐶)) < 𝑅)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2147 ∀wral 3080 ∃wrex 3090 ⊆ wss 3900 class class class wbr 5108 ↦ cmpt 5192 dom cdm 5658 ⟶wf 6562 ‘cfv 6566 (class class class)co 7451 ℂcc 11237 ℝcr 11238 < clt 11382 ≤ cle 11383 − cmin 11580 ℝ+crp 13160 abscabs 15444 ⇝𝑟 crli 15696 |
| 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-sep 5255 ax-nul 5266 ax-pow 5334 ax-pr 5398 ax-un 7783 ax-cnex 11295 ax-resscn 11296 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 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-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 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-op 4841 df-uni 4873 df-br 5109 df-opab 5174 df-mpt 5193 df-id 5553 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-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-fv 6574 df-ov 7454 df-oprab 7455 df-mpo 7456 df-pm 8888 df-rlim 15700 |
| This theorem is used by: rlimi2 15725 rlimclim1 15756 rlimuni 15761 rlimcld2 15789 rlimcn1 15799 rlimcn3 15801 rlimo1 15828 o1rlimmul 15830 rlimno1 15865 xrlimcnp 27353 rlimcxp 27358 chtppilimlem2 27858 dchrisumlem3 27875 |
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