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Delimiters are parentheses, braces, or other characters used to mark the start and end of subformulas. This formula has three sets of parentheses delimiting the three subformulas.

(z-z_0)^2 = (x-x_0)^2 + (y-y_0)^2

The delimiters do not need to match, so you can enter `\( [0,1) \)`

.

Here are the common delimiters:

Delimiter | Command | Name |
---|---|---|

( | `(` | Left parenthesis |

) | `)` | Right parenthesis |

\} | `{` or `\lbrace` | Left brace |

\{ | `}` or `\rbrace` | Right brace |

[ | `[` or `\lbrack` | Left bracket |

] | `]` or `\rbrack` | Right bracket |

⌊ | `\lfloor` | Left floor bracket |

⌋ | `\rfloor` | Right floor bracket |

⌈ | `\lceil` | Left ceiling bracket |

⌉ | `\rceil` | Right ceiling bracket |

⟨ | `\langle` | Left angle bracket |

⟩ | `\rangle` | Right angle bracket |

/ | `/` | Slash, or forward slash |

\ | `\backslash` | Reverse slash, or backslash |

| | `|` or `\vert` | Vertical bar |

‖ | `\|` or `\Vert` | Double vertical bar |

The `mathtools`

package allows you to create commands for paired
delimiters. For instance, if you put
`\DeclarePairedDelimiter\abs{\lvert}{\rvert}`

in your preamble
then you get two commands for single-line vertical bars (they only work
in math mode). The starred form, such as
`\abs*{\frac{22}{7}}`

, has the height of the vertical bars
match the height of the argument. The unstarred form, such as
`\abs{\frac{22}{7}}`

, has the bars fixed at a default height.
This form accepts an optional argument, as in `\abs[`

, where the height of the bars is given in
`size
command`]{\frac{22}{7}}`size command`, such as `\Bigg`

. Using instead `\lVert`

and `\rVert`

as the symbols will give you a norm symbol with the
same behavior.