\begin{definition}[Definition:Distributional Derivative/Higher Derivatives]
The '''$n$th distributional derivative''' of a distribution $T \in \map \DD \R$ is defined as:
:$T^{\paren n} := \begin {cases}
\paren {T^{\paren {n - 1}}}' & : n > 0 \\
T & : n = 0 \end {cases}$
\end{definition}