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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 13426 | . . . 4 ⊢ ((𝑥 ∈ ℝ* ∧ 𝑦 ∈ ℝ*) → (𝑥(,)𝑦) = {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)}) | |
| 2 | ioossre 13464 | . . . . 5 ⊢ (𝑥(,)𝑦) ⊆ ℝ | |
| 3 | ovex 7450 | . . . . . 6 ⊢ (𝑥(,)𝑦) ∈ V | |
| 4 | 3 | elpw 4564 | . . . . 5 ⊢ ((𝑥(,)𝑦) ∈ 𝒫 ℝ ↔ (𝑥(,)𝑦) ⊆ ℝ) |
| 5 | 2, 4 | mpbir 234 | . . . 4 ⊢ (𝑥(,)𝑦) ∈ 𝒫 ℝ |
| 6 | 1, 5 | eqeltrrdi 2871 | . . 3 ⊢ ((𝑥 ∈ ℝ* ∧ 𝑦 ∈ ℝ*) → {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)} ∈ 𝒫 ℝ) |
| 7 | 6 | rgen2 3204 | . 2 ⊢ ∀𝑥 ∈ ℝ* ∀𝑦 ∈ ℝ* {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)} ∈ 𝒫 ℝ |
| 8 | df-ioo 13406 | . . 3 ⊢ (,) = (𝑥 ∈ ℝ*, 𝑦 ∈ ℝ* ↦ {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)}) | |
| 9 | 8 | fmpo 8069 | . 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 3078 {crab 3414 ⊆ wss 3902 𝒫 cpw 4560 class class class wbr 5107 × cxp 5657 ⟶wf 6533 (class class class)co 7417 ℝcr 11127 ℝ*cxr 11270 < clt 11271 (,)cioo 13402 |
| 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 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7740 ax-cnex 11184 ax-resscn 11185 ax-pre-lttri 11202 ax-pre-lttrn 11203 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-id 5554 df-po 5567 df-so 5568 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-ov 7420 df-oprab 7421 df-mpo 7422 df-1st 7990 df-2nd 7991 df-er 8700 df-en 8957 df-dom 8958 df-sdom 8959 df-pnf 11273 df-mnf 11274 df-xr 11275 df-ltxr 11276 df-le 11277 df-ioo 13406 |
| This theorem is used by: unirnioo 13506 dfioo2 13507 ioorebas 13508 qtopbaslem 24990 retopbas 24992 qdensere 25001 blssioo 25027 tgioo 25028 tgqioo 25032 re2ndc 25033 xrtgioo 25039 xrge0tsms 25067 bndth 25192 ovolfioo 25701 ovollb 25713 ovolicc2 25756 ovolfs2 25805 ioorf 25807 ioorinv 25810 ioorcl 25811 uniiccdif 25812 uniioovol 25813 uniiccvol 25814 uniioombllem2 25817 uniioombllem3a 25818 uniioombllem3 25819 uniioombllem4 25820 uniioombllem5 25821 uniioombl 25823 opnmblALT 25837 mbfdm 25860 mbfima 25864 mbfid 25869 ismbfd 25873 mbfimaopnlem 25889 i1fd 25915 xrge0tsmsd 33521 iccllysconn 35837 rellysconn 35838 relowlssretop 38125 relowlpssretop 38126 ftc1anc 38458 ftc2nc 38459 ioofun 46389 islptre 46457 volioof 46823 fvvolioof 46825 ovolval3 47483 ovolval4lem1 47485 ovolval5lem2 47489 ovolval5lem3 47490 |
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