| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 15424 | . 2 ⊢ (𝜑 → ∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 ≤ 𝑧 → (abs‘(𝐵 − 𝐶)) < 𝑅)) |
| 5 | eqid 2733 | . . . . . 6 ⊢ (𝑧 ∈ 𝐴 ↦ 𝐵) = (𝑧 ∈ 𝐴 ↦ 𝐵) | |
| 6 | 5 | fnmpt 6628 | . . . . 5 ⊢ (∀𝑧 ∈ 𝐴 𝐵 ∈ 𝑉 → (𝑧 ∈ 𝐴 ↦ 𝐵) Fn 𝐴) |
| 7 | fndm 6591 | . . . . 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 15413 | . . . . 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 3966 | . . 3 ⊢ (𝜑 → 𝐴 ⊆ ℝ) |
| 12 | rlimi.4 | . . 3 ⊢ (𝜑 → 𝐷 ∈ ℝ) | |
| 13 | rexico 15265 | . . 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 2113 ∀wral 3048 ∃wrex 3057 ⊆ wss 3898 class class class wbr 5095 ↦ cmpt 5176 dom cdm 5621 Fn wfn 6483 ‘cfv 6488 (class class class)co 7354 ℝcr 11014 +∞cpnf 11152 < clt 11155 ≤ cle 11156 − cmin 11353 ℝ+crp 12894 [,)cico 13251 abscabs 15145 ⇝𝑟 crli 15396 |
| 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 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7676 ax-cnex 11071 ax-resscn 11072 ax-pre-lttri 11089 ax-pre-lttrn 11090 |
| 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 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-nel 3034 df-ral 3049 df-rex 3058 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-nul 4283 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4861 df-br 5096 df-opab 5158 df-mpt 5177 df-id 5516 df-po 5529 df-so 5530 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-iota 6444 df-fun 6490 df-fn 6491 df-f 6492 df-f1 6493 df-fo 6494 df-f1o 6495 df-fv 6496 df-ov 7357 df-oprab 7358 df-mpo 7359 df-er 8630 df-pm 8761 df-en 8878 df-dom 8879 df-sdom 8880 df-pnf 11157 df-mnf 11158 df-xr 11159 df-ltxr 11160 df-le 11161 df-ico 13255 df-rlim 15400 |
| This theorem is referenced by: (None) |
| Copyright terms: Public domain | W3C validator |