# IsotropicMixin¶

class probnum.randprocs.kernels.IsotropicMixin

Bases: abc.ABC

Mixin for isotropic kernels.

An isotropic kernel is a kernel which only depends on the Euclidean norm of the distance between the arguments, i.e.

$k(x_0, x_1) = k(\lVert x_0 - x_1 \rVert_2).$

Hence, all isotropic kernels are stationary.