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| Mirrors > Home > MPE Home > Th. List > ioof | Structured version Visualization version 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 13387 | . . . 4 ⊢ ((𝑥 ∈ ℝ* ∧ 𝑦 ∈ ℝ*) → (𝑥(,)𝑦) = {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)}) | |
| 2 | ioossre 13425 | . . . . 5 ⊢ (𝑥(,)𝑦) ⊆ ℝ | |
| 3 | ovex 7433 | . . . . . 6 ⊢ (𝑥(,)𝑦) ∈ V | |
| 4 | 3 | elpw 4562 | . . . . 5 ⊢ ((𝑥(,)𝑦) ∈ 𝒫 ℝ ↔ (𝑥(,)𝑦) ⊆ ℝ) |
| 5 | 2, 4 | mpbir 234 | . . . 4 ⊢ (𝑥(,)𝑦) ∈ 𝒫 ℝ |
| 6 | 1, 5 | eqeltrrdi 2874 | . . 3 ⊢ ((𝑥 ∈ ℝ* ∧ 𝑦 ∈ ℝ*) → {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)} ∈ 𝒫 ℝ) |
| 7 | 6 | rgen2 3205 | . 2 ⊢ ∀𝑥 ∈ ℝ* ∀𝑦 ∈ ℝ* {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)} ∈ 𝒫 ℝ |
| 8 | df-ioo 13367 | . . 3 ⊢ (,) = (𝑥 ∈ ℝ*, 𝑦 ∈ ℝ* ↦ {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)}) | |
| 9 | 8 | fmpo 8053 | . 2 ⊢ (∀𝑥 ∈ ℝ* ∀𝑦 ∈ ℝ* {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)} ∈ 𝒫 ℝ ↔ (,):(ℝ* × ℝ*)⟶𝒫 ℝ) |
| 10 | 7, 9 | mpbi 233 | 1 ⊢ (,):(ℝ* × ℝ*)⟶𝒫 ℝ |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 400 ∈ wcel 2145 ∀wral 3079 {crab 3417 ⊆ wss 3907 𝒫 cpw 4558 class class class wbr 5105 × cxp 5650 ⟶wf 6521 (class class class)co 7400 ℝcr 11087 ℝ*cxr 11230 < clt 11231 (,)cioo 13363 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-sep 5251 ax-nul 5261 ax-pow 5327 ax-pr 5395 ax-un 7722 ax-cnex 11144 ax-resscn 11145 ax-pre-lttri 11162 ax-pre-lttrn 11163 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3065 df-ral 3080 df-rex 3090 df-rab 3418 df-v 3459 df-sbc 3748 df-csb 3856 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-nul 4289 df-if 4484 df-pw 4560 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4869 df-iun 4954 df-br 5106 df-opab 5168 df-mpt 5187 df-id 5547 df-po 5560 df-so 5561 df-xp 5658 df-rel 5659 df-cnv 5660 df-co 5661 df-dm 5662 df-rn 5663 df-res 5664 df-ima 5665 df-iota 6481 df-fun 6527 df-fn 6528 df-f 6529 df-f1 6530 df-fo 6531 df-f1o 6532 df-fv 6533 df-ov 7403 df-oprab 7404 df-mpo 7405 df-1st 7974 df-2nd 7975 df-er 8682 df-en 8932 df-dom 8933 df-sdom 8934 df-pnf 11233 df-mnf 11234 df-xr 11235 df-ltxr 11236 df-le 11237 df-ioo 13367 |
| This theorem is referenced by: unirnioo 13467 dfioo2 13468 ioorebas 13469 qtopbaslem 24876 retopbas 24878 qdensere 24887 blssioo 24913 tgioo 24914 tgqioo 24918 re2ndc 24919 xrtgioo 24925 xrge0tsms 24953 bndth 25078 ovolfioo 25587 ovollb 25599 ovolicc2 25642 ovolfs2 25691 ioorf 25693 ioorinv 25696 ioorcl 25697 uniiccdif 25698 uniioovol 25699 uniiccvol 25700 uniioombllem2 25703 uniioombllem3a 25704 uniioombllem3 25705 uniioombllem4 25706 uniioombllem5 25707 uniioombl 25709 opnmblALT 25723 mbfdm 25746 mbfima 25750 mbfid 25755 ismbfd 25759 mbfimaopnlem 25775 i1fd 25801 xrge0tsmsd 33306 iccllysconn 35613 rellysconn 35614 relowlssretop 37869 relowlpssretop 37870 ftc1anc 38212 ftc2nc 38213 ioofun 46125 islptre 46193 volioof 46559 fvvolioof 46561 ovolval3 47219 ovolval4lem1 47221 ovolval5lem2 47225 ovolval5lem3 47226 |
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