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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 9639 | . 2 | |
2 | vx | . . 3 | |
3 | vy | . . 3 | |
4 | cxr 7767 | . . 3 | |
5 | 2 | cv 1315 | . . . . . 6 |
6 | vz | . . . . . . 7 | |
7 | 6 | cv 1315 | . . . . . 6 |
8 | clt 7768 | . . . . . 6 | |
9 | 5, 7, 8 | wbr 3899 | . . . . 5 |
10 | 3 | cv 1315 | . . . . . 6 |
11 | 7, 10, 8 | wbr 3899 | . . . . 5 |
12 | 9, 11 | wa 103 | . . . 4 |
13 | 12, 6, 4 | crab 2397 | . . 3 |
14 | 2, 3, 4, 4, 13 | cmpo 5744 | . 2 |
15 | 1, 14 | wceq 1316 | 1 |
Colors of variables: wff set class |
This definition is referenced by: iooex 9658 iooval 9659 elioo3g 9661 elioo1 9662 iooss1 9667 iooss2 9668 eliooxr 9678 iccssioo 9693 ioossicc 9710 ioossico 9713 iocssioo 9714 icossioo 9715 ioossioo 9716 ioof 9722 ioodisj 9744 |
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