\lbrace \rbraceCurly 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 \rbracePiecewise 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