┌ ┐The symbols ┌ and ┐ are used as delimiters in mathematical expressions to denote the top corners of a matrix or a specific type of bracket. They are often used in conjunction with other symbols to form a complete set of brackets, such as ┌ ┐ for the top and └ ┘ for the bottom, to enclose matrices or other mathematical constructs.
A 2x2 matrix enclosed by ┌ ┐ and └ ┘ symbols.
\begin{pmatrix} a & b \\ c & d \end{pmatrix}Ceiling function using ┌ and ┐ as part of the notation.
\left\lceil x \right\rceilInner product or angle brackets using ┌ and ┐ as part of the notation.
\left\langle a, b \right\rangle