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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 13481 | . . . 4 ⊢ ((𝑥 ∈ ℝ* ∧ 𝑦 ∈ ℝ*) → (𝑥(,)𝑦) = {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)}) | |
| 2 | ioossre 13519 | . . . . 5 ⊢ (𝑥(,)𝑦) ⊆ ℝ | |
| 3 | ovex 7445 | . . . . . 6 ⊢ (𝑥(,)𝑦) ∈ V | |
| 4 | 3 | elpw 4561 | . . . . 5 ⊢ ((𝑥(,)𝑦) ∈ 𝒫 ℝ ↔ (𝑥(,)𝑦) ⊆ ℝ) |
| 5 | 2, 4 | mpbir 234 | . . . 4 ⊢ (𝑥(,)𝑦) ∈ 𝒫 ℝ |
| 6 | 1, 5 | eqeltrrdi 2870 | . . 3 ⊢ ((𝑥 ∈ ℝ* ∧ 𝑦 ∈ ℝ*) → {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)} ∈ 𝒫 ℝ) |
| 7 | 6 | rgen2 3203 | . 2 ⊢ ∀𝑥 ∈ ℝ* ∀𝑦 ∈ ℝ* {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)} ∈ 𝒫 ℝ |
| 8 | df-ioo 13461 | . . 3 ⊢ (,) = (𝑥 ∈ ℝ*, 𝑦 ∈ ℝ* ↦ {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)}) | |
| 9 | 8 | fmpo 8068 | . 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 |
| This proof depends on syntax axioms: ∧ wa 401 ∈ wcel 2145 ∀wral 3077 {crab 3413 ⊆ wss 3899 𝒫 cpw 4557 class class class wbr 5103 × cxp 5649 ⟶wf 6527 (class class class)co 7412 ℝcr 11180 ℝ*cxr 11323 < clt 11324 (,)cioo 13457 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7740 ax-cnex 11237 ax-resscn 11238 ax-pre-lttri 11255 ax-pre-lttrn 11256 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-po 5559 df-so 5560 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-ov 7415 df-oprab 7416 df-mpo 7417 df-1st 7990 df-2nd 7991 df-er 8701 df-en 8958 df-dom 8959 df-sdom 8960 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-ioo 13461 |
| This theorem is used by: unirnioo 13561 dfioo2 13562 ioorebas 13563 qtopbaslem 25057 retopbas 25059 qdensere 25068 blssioo 25094 tgioo 25095 tgqioo 25099 re2ndc 25100 xrtgioo 25106 xrge0tsms 25134 bndth 25259 ovolfioo 25768 ovollb 25780 ovolicc2 25823 ovolfs2 25872 ioorf 25874 ioorinv 25877 ioorcl 25878 uniiccdif 25879 uniioovol 25880 uniiccvol 25881 uniioombllem2 25884 uniioombllem3a 25885 uniioombllem3 25886 uniioombllem4 25887 uniioombllem5 25888 uniioombl 25890 opnmblALT 25904 mbfdm 25927 mbfima 25931 mbfid 25936 ismbfd 25940 mbfimaopnlem 25956 i1fd 25982 xrge0tsmsd 33616 iccllysconn 35984 rellysconn 35985 relowlssretop 38254 relowlpssretop 38255 ftc1anc 38587 ftc2nc 38588 ioofun 46507 islptre 46575 volioof 46941 fvvolioof 46943 ovolval3 47601 ovolval4lem1 47603 ovolval5lem2 47607 ovolval5lem3 47608 |
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