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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 15466 | . 2 ⊢ (𝜑 → ∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 ≤ 𝑧 → (abs‘(𝐵 − 𝐶)) < 𝑅)) |
| 5 | eqid 2737 | . . . . . 6 ⊢ (𝑧 ∈ 𝐴 ↦ 𝐵) = (𝑧 ∈ 𝐴 ↦ 𝐵) | |
| 6 | 5 | fnmpt 6632 | . . . . 5 ⊢ (∀𝑧 ∈ 𝐴 𝐵 ∈ 𝑉 → (𝑧 ∈ 𝐴 ↦ 𝐵) Fn 𝐴) |
| 7 | fndm 6595 | . . . . 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 15455 | . . . . 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 3958 | . . 3 ⊢ (𝜑 → 𝐴 ⊆ ℝ) |
| 12 | rlimi.4 | . . 3 ⊢ (𝜑 → 𝐷 ∈ ℝ) | |
| 13 | rexico 15307 | . . 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 585 | . 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 1542 ∈ wcel 2114 ∀wral 3052 ∃wrex 3062 ⊆ wss 3890 class class class wbr 5086 ↦ cmpt 5167 dom cdm 5624 Fn wfn 6487 ‘cfv 6492 (class class class)co 7360 ℝcr 11028 +∞cpnf 11167 < clt 11170 ≤ cle 11171 − cmin 11368 ℝ+crp 12933 [,)cico 13291 abscabs 15187 ⇝𝑟 crli 15438 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 ax-cnex 11085 ax-resscn 11086 ax-pre-lttri 11103 ax-pre-lttrn 11104 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5519 df-po 5532 df-so 5533 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-ov 7363 df-oprab 7364 df-mpo 7365 df-er 8636 df-pm 8769 df-en 8887 df-dom 8888 df-sdom 8889 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-ico 13295 df-rlim 15442 |
| This theorem is referenced by: (None) |
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