\begin{definition}[Definition:Differential Equation/Distributional]
A '''differential equation''' is classified as '''distributional''' if, in addition to ordinary and partial derivatives and functions, they also involve at least one of the following notions:
*Distributional ordinary derivative
*Distributional partial derivative
*Distribution and/or its derivatives
Note that every standard differential equation can be written as a distributional one, but not the other way around.
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\end{definition}