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| Mirrors > Home > ILE Home > Th. List > ioof | GIF version | ||
| Description: The set of open intervals of extended reals maps to subsets of reals. (Contributed by NM, 7-Feb-2007.) (Revised by Mario Carneiro, 16-Nov-2013.) |
| Ref | Expression |
|---|---|
| ioof | ⊢ (,):(ℝ* × ℝ*)⟶𝒫 ℝ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | iooval 10136 | . . . 4 ⊢ ((𝑥 ∈ ℝ* ∧ 𝑦 ∈ ℝ*) → (𝑥(,)𝑦) = {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)}) | |
| 2 | ioossre 10163 | . . . . 5 ⊢ (𝑥(,)𝑦) ⊆ ℝ | |
| 3 | df-ov 6016 | . . . . . . 7 ⊢ (𝑥(,)𝑦) = ((,)‘〈𝑥, 𝑦〉) | |
| 4 | iooex 10135 | . . . . . . . 8 ⊢ (,) ∈ V | |
| 5 | vex 2803 | . . . . . . . . 9 ⊢ 𝑥 ∈ V | |
| 6 | vex 2803 | . . . . . . . . 9 ⊢ 𝑦 ∈ V | |
| 7 | 5, 6 | opex 4319 | . . . . . . . 8 ⊢ 〈𝑥, 𝑦〉 ∈ V |
| 8 | 4, 7 | fvex 5655 | . . . . . . 7 ⊢ ((,)‘〈𝑥, 𝑦〉) ∈ V |
| 9 | 3, 8 | eqeltri 2302 | . . . . . 6 ⊢ (𝑥(,)𝑦) ∈ V |
| 10 | 9 | elpw 3656 | . . . . 5 ⊢ ((𝑥(,)𝑦) ∈ 𝒫 ℝ ↔ (𝑥(,)𝑦) ⊆ ℝ) |
| 11 | 2, 10 | mpbir 146 | . . . 4 ⊢ (𝑥(,)𝑦) ∈ 𝒫 ℝ |
| 12 | 1, 11 | eqeltrrdi 2321 | . . 3 ⊢ ((𝑥 ∈ ℝ* ∧ 𝑦 ∈ ℝ*) → {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)} ∈ 𝒫 ℝ) |
| 13 | 12 | rgen2a 2584 | . 2 ⊢ ∀𝑥 ∈ ℝ* ∀𝑦 ∈ ℝ* {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)} ∈ 𝒫 ℝ |
| 14 | df-ioo 10120 | . . 3 ⊢ (,) = (𝑥 ∈ ℝ*, 𝑦 ∈ ℝ* ↦ {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)}) | |
| 15 | 14 | fmpo 6361 | . 2 ⊢ (∀𝑥 ∈ ℝ* ∀𝑦 ∈ ℝ* {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)} ∈ 𝒫 ℝ ↔ (,):(ℝ* × ℝ*)⟶𝒫 ℝ) |
| 16 | 13, 15 | mpbi 145 | 1 ⊢ (,):(ℝ* × ℝ*)⟶𝒫 ℝ |
| Colors of variables: wff set class |
| Syntax hints: ∧ wa 104 ∈ wcel 2200 ∀wral 2508 {crab 2512 Vcvv 2800 ⊆ wss 3198 𝒫 cpw 3650 〈cop 3670 class class class wbr 4086 × cxp 4721 ⟶wf 5320 ‘cfv 5324 (class class class)co 6013 ℝcr 8024 ℝ*cxr 8206 < clt 8207 (,)cioo 10116 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4205 ax-pow 4262 ax-pr 4297 ax-un 4528 ax-setind 4633 ax-cnex 8116 ax-resscn 8117 ax-pre-ltirr 8137 ax-pre-ltwlin 8138 ax-pre-lttrn 8139 |
| This theorem depends on definitions: df-bi 117 df-3or 1003 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-rab 2517 df-v 2802 df-sbc 3030 df-csb 3126 df-dif 3200 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-iun 3970 df-br 4087 df-opab 4149 df-mpt 4150 df-id 4388 df-po 4391 df-iso 4392 df-xp 4729 df-rel 4730 df-cnv 4731 df-co 4732 df-dm 4733 df-rn 4734 df-res 4735 df-ima 4736 df-iota 5284 df-fun 5326 df-fn 5327 df-f 5328 df-fv 5332 df-ov 6016 df-oprab 6017 df-mpo 6018 df-1st 6298 df-2nd 6299 df-pnf 8209 df-mnf 8210 df-xr 8211 df-ltxr 8212 df-le 8213 df-ioo 10120 |
| This theorem is referenced by: unirnioo 10201 dfioo2 10202 ioorebasg 10203 qtopbasss 15238 retopbas 15240 tgioo 15271 tgqioo 15272 |
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