Macaulay brackets

Macaulay brackets are a notation used to describe the ramp function

$\{x\} = \begin{cases} 0, & x < 0 \\ x, & x \ge 0. \end{cases}$

Another commonly used notation is $x$ ₊ or $(x)$ ₊ for the positive part of $x$ , which avoids conflicts with $\{...\}$ for set notation.

See also