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Mirrors > Home > MPE Home > Th. List > df-ioo | Structured version Visualization version GIF version |
Description: Define the set of open intervals of extended reals. (Contributed by NM, 24-Dec-2006.) |
Ref | Expression |
---|---|
df-ioo | ⊢ (,) = (𝑥 ∈ ℝ*, 𝑦 ∈ ℝ* ↦ {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cioo 12726 | . 2 class (,) | |
2 | vx | . . 3 setvar 𝑥 | |
3 | vy | . . 3 setvar 𝑦 | |
4 | cxr 10663 | . . 3 class ℝ* | |
5 | 2 | cv 1537 | . . . . . 6 class 𝑥 |
6 | vz | . . . . . . 7 setvar 𝑧 | |
7 | 6 | cv 1537 | . . . . . 6 class 𝑧 |
8 | clt 10664 | . . . . . 6 class < | |
9 | 5, 7, 8 | wbr 5030 | . . . . 5 wff 𝑥 < 𝑧 |
10 | 3 | cv 1537 | . . . . . 6 class 𝑦 |
11 | 7, 10, 8 | wbr 5030 | . . . . 5 wff 𝑧 < 𝑦 |
12 | 9, 11 | wa 399 | . . . 4 wff (𝑥 < 𝑧 ∧ 𝑧 < 𝑦) |
13 | 12, 6, 4 | crab 3110 | . . 3 class {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)} |
14 | 2, 3, 4, 4, 13 | cmpo 7137 | . 2 class (𝑥 ∈ ℝ*, 𝑦 ∈ ℝ* ↦ {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)}) |
15 | 1, 14 | wceq 1538 | 1 wff (,) = (𝑥 ∈ ℝ*, 𝑦 ∈ ℝ* ↦ {𝑧 ∈ ℝ* ∣ (𝑥 < 𝑧 ∧ 𝑧 < 𝑦)}) |
Colors of variables: wff setvar class |
This definition is referenced by: iooex 12749 iooval 12750 ndmioo 12753 elioo3g 12755 iooin 12760 iooss1 12761 iooss2 12762 elioo1 12766 iccssioo 12794 ioossicc 12811 ioossico 12816 iocssioo 12817 icossioo 12818 ioossioo 12819 ioof 12825 ioounsn 12855 snunioo 12856 ioodisj 12860 ioojoin 12861 ioopnfsup 13227 leordtval 21818 icopnfcld 23373 iocmnfcld 23374 bndth 23563 ioombl 24169 ioorf 24177 ioorinv2 24179 ismbf3d 24258 dvfsumrlimge0 24633 dvfsumrlim2 24635 tanord1 25129 dvloglem 25239 rlimcnp 25551 rlimcnp2 25552 dchrisum0lem2a 26101 pnt 26198 joiniooico 30523 tpr2rico 31265 asindmre 35140 dvasin 35141 ioossioc 42129 snunioo1 42149 ioossioobi 42154 |
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