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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 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cioo 9886 |
. 2
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2 | vx |
. . 3
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3 | vy |
. . 3
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4 | cxr 7989 |
. . 3
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5 | 2 | cv 1352 |
. . . . . 6
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6 | vz |
. . . . . . 7
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7 | 6 | cv 1352 |
. . . . . 6
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8 | clt 7990 |
. . . . . 6
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9 | 5, 7, 8 | wbr 4003 |
. . . . 5
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10 | 3 | cv 1352 |
. . . . . 6
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11 | 7, 10, 8 | wbr 4003 |
. . . . 5
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12 | 9, 11 | wa 104 |
. . . 4
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13 | 12, 6, 4 | crab 2459 |
. . 3
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14 | 2, 3, 4, 4, 13 | cmpo 5876 |
. 2
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15 | 1, 14 | wceq 1353 |
1
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Colors of variables: wff set class |
This definition is referenced by: iooex 9905 iooval 9906 elioo3g 9908 elioo1 9909 iooss1 9914 iooss2 9915 eliooxr 9925 iccssioo 9940 ioossicc 9957 ioossico 9960 iocssioo 9961 icossioo 9962 ioossioo 9963 ioof 9969 ioodisj 9991 |
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