---
tag: 6ZSKDQPN7E
kind: concept
name: Left-open
sources:
  - wikipedia: en:73634@r1376316324
    locator: Glossary of mathematical symbols, section Brackets > Other brackets
    note: adopted
    mention: wikipedia://en/73634#UM6Q
    sections: [Summary]
inventory: [HSXAEX4AA0]
---

## Summary

Both notations are used for a left-open interval.