\lbrace \rbrace
Curly braces are used as delimiters in mathematical expressions to group terms or to denote sets. They are often used in set notation, piecewise functions, and to group terms in equations.
Set notation for all real numbers x such that x squared is less than 4.
\lbrace x \in \mathbb{R} \mid x^2 < 4 \rbrace
Piecewise function using curly braces to define different expressions based on conditions.
f(x) = \begin{cases} x^2, & \text{if } x \geq 0 \\ -x, & \text{if } x < 0 \end{cases}
A set containing elements a, b, and c.
\lbrace a, b, c \rbrace