⎰ ⎱The symbols ⎰ and ⎱ are used as delimiters in mathematical expressions, often to denote a specific type of grouping or enclosure, similar to parentheses or brackets. They are less common and can be used to visually distinguish certain parts of an equation or expression.
Integral with curly brackets as delimiters
\int_{a}^{b} \left\{ f(x) \, dx \right\}Set notation using curly brackets
\left\{ x \in \mathbb{R} \mid x^2 < 4 \right\}Piecewise function or system of equations using curly brackets
\left\{ \begin{array}{ll} x+y=10 \\ x-y=4 \end{array} \right.