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| Mirrors > Home > MPE Home > Th. List > rlimi2 | Structured version Visualization version GIF version | ||
| Description: Convergence at infinity of a function on the reals. (Contributed by Mario Carneiro, 12-May-2016.) |
| Ref | Expression |
|---|---|
| rlimi.1 | ⊢ (𝜑 → ∀𝑧 ∈ 𝐴 𝐵 ∈ 𝑉) |
| rlimi.2 | ⊢ (𝜑 → 𝑅 ∈ ℝ+) |
| rlimi.3 | ⊢ (𝜑 → (𝑧 ∈ 𝐴 ↦ 𝐵) ⇝𝑟 𝐶) |
| rlimi.4 | ⊢ (𝜑 → 𝐷 ∈ ℝ) |
| Ref | Expression |
|---|---|
| rlimi2 | ⊢ (𝜑 → ∃𝑦 ∈ (𝐷[,)+∞)∀𝑧 ∈ 𝐴 (𝑦 ≤ 𝑧 → (abs‘(𝐵 − 𝐶)) < 𝑅)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rlimi.1 | . . 3 ⊢ (𝜑 → ∀𝑧 ∈ 𝐴 𝐵 ∈ 𝑉) | |
| 2 | rlimi.2 | . . 3 ⊢ (𝜑 → 𝑅 ∈ ℝ+) | |
| 3 | rlimi.3 | . . 3 ⊢ (𝜑 → (𝑧 ∈ 𝐴 ↦ 𝐵) ⇝𝑟 𝐶) | |
| 4 | 1, 2, 3 | rlimi 15420 | . 2 ⊢ (𝜑 → ∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 ≤ 𝑧 → (abs‘(𝐵 − 𝐶)) < 𝑅)) |
| 5 | eqid 2731 | . . . . . 6 ⊢ (𝑧 ∈ 𝐴 ↦ 𝐵) = (𝑧 ∈ 𝐴 ↦ 𝐵) | |
| 6 | 5 | fnmpt 6621 | . . . . 5 ⊢ (∀𝑧 ∈ 𝐴 𝐵 ∈ 𝑉 → (𝑧 ∈ 𝐴 ↦ 𝐵) Fn 𝐴) |
| 7 | fndm 6584 | . . . . 5 ⊢ ((𝑧 ∈ 𝐴 ↦ 𝐵) Fn 𝐴 → dom (𝑧 ∈ 𝐴 ↦ 𝐵) = 𝐴) | |
| 8 | 1, 6, 7 | 3syl 18 | . . . 4 ⊢ (𝜑 → dom (𝑧 ∈ 𝐴 ↦ 𝐵) = 𝐴) |
| 9 | rlimss 15409 | . . . . 5 ⊢ ((𝑧 ∈ 𝐴 ↦ 𝐵) ⇝𝑟 𝐶 → dom (𝑧 ∈ 𝐴 ↦ 𝐵) ⊆ ℝ) | |
| 10 | 3, 9 | syl 17 | . . . 4 ⊢ (𝜑 → dom (𝑧 ∈ 𝐴 ↦ 𝐵) ⊆ ℝ) |
| 11 | 8, 10 | eqsstrrd 3970 | . . 3 ⊢ (𝜑 → 𝐴 ⊆ ℝ) |
| 12 | rlimi.4 | . . 3 ⊢ (𝜑 → 𝐷 ∈ ℝ) | |
| 13 | rexico 15261 | . . 3 ⊢ ((𝐴 ⊆ ℝ ∧ 𝐷 ∈ ℝ) → (∃𝑦 ∈ (𝐷[,)+∞)∀𝑧 ∈ 𝐴 (𝑦 ≤ 𝑧 → (abs‘(𝐵 − 𝐶)) < 𝑅) ↔ ∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 ≤ 𝑧 → (abs‘(𝐵 − 𝐶)) < 𝑅))) | |
| 14 | 11, 12, 13 | syl2anc 584 | . 2 ⊢ (𝜑 → (∃𝑦 ∈ (𝐷[,)+∞)∀𝑧 ∈ 𝐴 (𝑦 ≤ 𝑧 → (abs‘(𝐵 − 𝐶)) < 𝑅) ↔ ∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 ≤ 𝑧 → (abs‘(𝐵 − 𝐶)) < 𝑅))) |
| 15 | 4, 14 | mpbird 257 | 1 ⊢ (𝜑 → ∃𝑦 ∈ (𝐷[,)+∞)∀𝑧 ∈ 𝐴 (𝑦 ≤ 𝑧 → (abs‘(𝐵 − 𝐶)) < 𝑅)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 = wceq 1541 ∈ wcel 2111 ∀wral 3047 ∃wrex 3056 ⊆ wss 3902 class class class wbr 5091 ↦ cmpt 5172 dom cdm 5616 Fn wfn 6476 ‘cfv 6481 (class class class)co 7346 ℝcr 11005 +∞cpnf 11143 < clt 11146 ≤ cle 11147 − cmin 11344 ℝ+crp 12890 [,)cico 13247 abscabs 15141 ⇝𝑟 crli 15392 |
| 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-sep 5234 ax-nul 5244 ax-pow 5303 ax-pr 5370 ax-un 7668 ax-cnex 11062 ax-resscn 11063 ax-pre-lttri 11080 ax-pre-lttrn 11081 |
| 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-rab 3396 df-v 3438 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4476 df-pw 4552 df-sn 4577 df-pr 4579 df-op 4583 df-uni 4860 df-br 5092 df-opab 5154 df-mpt 5173 df-id 5511 df-po 5524 df-so 5525 df-xp 5622 df-rel 5623 df-cnv 5624 df-co 5625 df-dm 5626 df-rn 5627 df-res 5628 df-ima 5629 df-iota 6437 df-fun 6483 df-fn 6484 df-f 6485 df-f1 6486 df-fo 6487 df-f1o 6488 df-fv 6489 df-ov 7349 df-oprab 7350 df-mpo 7351 df-er 8622 df-pm 8753 df-en 8870 df-dom 8871 df-sdom 8872 df-pnf 11148 df-mnf 11149 df-xr 11150 df-ltxr 11151 df-le 11152 df-ico 13251 df-rlim 15396 |
| This theorem is referenced by: (None) |
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