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Mirrors > Home > ILE Home > Th. List > df-ioo | Unicode version |
Description: Define the set of open intervals of extended reals. (Contributed by NM, 24-Dec-2006.) |
Ref | Expression |
---|---|
df-ioo |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cioo 8757 | . 2 | |
2 | vx | . . 3 | |
3 | vy | . . 3 | |
4 | cxr 7059 | . . 3 | |
5 | 2 | cv 1242 | . . . . . 6 |
6 | vz | . . . . . . 7 | |
7 | 6 | cv 1242 | . . . . . 6 |
8 | clt 7060 | . . . . . 6 | |
9 | 5, 7, 8 | wbr 3764 | . . . . 5 |
10 | 3 | cv 1242 | . . . . . 6 |
11 | 7, 10, 8 | wbr 3764 | . . . . 5 |
12 | 9, 11 | wa 97 | . . . 4 |
13 | 12, 6, 4 | crab 2310 | . . 3 |
14 | 2, 3, 4, 4, 13 | cmpt2 5514 | . 2 |
15 | 1, 14 | wceq 1243 | 1 |
Colors of variables: wff set class |
This definition is referenced by: iooex 8776 iooval 8777 elioo3g 8779 elioo1 8780 iooss1 8785 iooss2 8786 eliooxr 8796 iccssioo 8811 ioossicc 8828 ioossico 8831 iocssioo 8832 icossioo 8833 ioossioo 8834 ioof 8840 ioodisj 8861 |
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