# Symbols:Brackets/Angle Brackets

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## Symbol

Angle brackets are symbols used in a number of specific contexts.

They comprise the left angle bracket $\langle$ and the right angle bracket $\rangle$.

The $\LaTeX$ code for $\langle$ is \langle .

The $\LaTeX$ code for $\rangle$ is \rangle .

## Usage

Angle brackets are used in the following contexts:

The specification of a point in polar coordinates: $\polar {r, \theta}$
To denote a sequence: $\sequence {s_n}$
To denote the set of images under an indexed family: $\family {x_i}_{i \mathop \in I}$
To denote a generator of a group or other algebraic structure: $\gen {a, b}$

The $\LaTeX$ code for $\polar {r, \theta}$ is \polar {r, \theta} .

The $\LaTeX$ code for $\sequence {s_n}$ is \sequence {s_n} .

The $\LaTeX$ code for $\family {x_i}_{i \mathop \in I}$ is \family {x_i}_{i \mathop \in I} .

The $\LaTeX$ code for $\gen {a, b}$ is \gen {a, b} .