Exponential distribution
= Exponential distribution
{title2=$\operatorname{Exp}(\lambda)$}
{wiki}
= Exponential random variable
{synonym}
The exponential distribution with rate $c>0$ has density
$$
f(x)=ce^{-cx}\mathbf 1_{\{x\geq0\}}.
$$
It is the gamma distribution with shape one.