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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 13380 | . . . 4 ⊢ ((𝑥 ∈ ℝ* ∧ 𝑦 ∈ ℝ*) → (𝑥(,)𝑦) = {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)}) | |
2 | ioossre 13417 | . . . . 5 ⊢ (𝑥(,)𝑦) ⊆ ℝ | |
3 | ovex 7450 | . . . . . 6 ⊢ (𝑥(,)𝑦) ∈ V | |
4 | 3 | elpw 4607 | . . . . 5 ⊢ ((𝑥(,)𝑦) ∈ 𝒫 ℝ ↔ (𝑥(,)𝑦) ⊆ ℝ) |
5 | 2, 4 | mpbir 230 | . . . 4 ⊢ (𝑥(,)𝑦) ∈ 𝒫 ℝ |
6 | 1, 5 | eqeltrrdi 2834 | . . 3 ⊢ ((𝑥 ∈ ℝ* ∧ 𝑦 ∈ ℝ*) → {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)} ∈ 𝒫 ℝ) |
7 | 6 | rgen2 3188 | . 2 ⊢ ∀𝑥 ∈ ℝ* ∀𝑦 ∈ ℝ* {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)} ∈ 𝒫 ℝ |
8 | df-ioo 13360 | . . 3 ⊢ (,) = (𝑥 ∈ ℝ*, 𝑦 ∈ ℝ* ↦ {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)}) | |
9 | 8 | fmpo 8071 | . 2 ⊢ (∀𝑥 ∈ ℝ* ∀𝑦 ∈ ℝ* {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)} ∈ 𝒫 ℝ ↔ (,):(ℝ* × ℝ*)⟶𝒫 ℝ) |
10 | 7, 9 | mpbi 229 | 1 ⊢ (,):(ℝ* × ℝ*)⟶𝒫 ℝ |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 394 ∈ wcel 2098 ∀wral 3051 {crab 3419 ⊆ wss 3945 𝒫 cpw 4603 class class class wbr 5148 × cxp 5675 ⟶wf 6543 (class class class)co 7417 ℝcr 11137 ℝ*cxr 11277 < clt 11278 (,)cioo 13356 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2696 ax-sep 5299 ax-nul 5306 ax-pow 5364 ax-pr 5428 ax-un 7739 ax-cnex 11194 ax-resscn 11195 ax-pre-lttri 11212 ax-pre-lttrn 11213 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2703 df-cleq 2717 df-clel 2802 df-nfc 2877 df-ne 2931 df-nel 3037 df-ral 3052 df-rex 3061 df-rab 3420 df-v 3465 df-sbc 3775 df-csb 3891 df-dif 3948 df-un 3950 df-in 3952 df-ss 3962 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4909 df-iun 4998 df-br 5149 df-opab 5211 df-mpt 5232 df-id 5575 df-po 5589 df-so 5590 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-iota 6499 df-fun 6549 df-fn 6550 df-f 6551 df-f1 6552 df-fo 6553 df-f1o 6554 df-fv 6555 df-ov 7420 df-oprab 7421 df-mpo 7422 df-1st 7992 df-2nd 7993 df-er 8723 df-en 8963 df-dom 8964 df-sdom 8965 df-pnf 11280 df-mnf 11281 df-xr 11282 df-ltxr 11283 df-le 11284 df-ioo 13360 |
This theorem is referenced by: unirnioo 13458 dfioo2 13459 ioorebas 13460 qtopbaslem 24705 retopbas 24707 qdensere 24716 blssioo 24741 tgioo 24742 tgqioo 24746 re2ndc 24747 xrtgioo 24752 xrge0tsms 24780 bndth 24914 ovolfioo 25426 ovollb 25438 ovolicc2 25481 ovolfs2 25530 ioorf 25532 ioorinv 25535 ioorcl 25536 uniiccdif 25537 uniioovol 25538 uniiccvol 25539 uniioombllem2 25542 uniioombllem3a 25543 uniioombllem3 25544 uniioombllem4 25545 uniioombllem5 25546 uniioombl 25548 opnmblALT 25562 mbfdm 25585 mbfima 25589 mbfid 25594 ismbfd 25598 mbfimaopnlem 25614 i1fd 25640 xrge0tsmsd 32828 iccllysconn 34930 rellysconn 34931 relowlssretop 36912 relowlpssretop 36913 ftc1anc 37244 ftc2nc 37245 ioofun 44999 islptre 45070 volioof 45438 fvvolioof 45440 ovolval3 46098 ovolval4lem1 46100 ovolval5lem2 46104 ovolval5lem3 46105 |
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