Divergence.derivative

Divergence.derivative(point=None)

Return the derivative operator.

The Divergence is usually linear, but in case the 'constant' pad_mode is used with nonzero pad_const, the derivative is given by the Divergence with pad_const=0.

Parameters:

pointdomain element, optional

The point to take the derivative in. Does not change the result since the operator is affine.