| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | open interval | mathematics | An open interval does not include its endpoints in its set of values. | 1 |
| 2 | open interval | mathematics | In mathematics, an open interval does not include its endpoints. | 1 |
| 3 | open interval | mathematics | In mathematics, an open interval is a set of real numbers between two distinct endpoints, not including the endpoints themselves. | 1 |
| 4 | open interval | mathematics | In mathematics, an open interval is a set of real numbers between two given numbers, excluding the endpoints. | 1 |