ory" title="Permalink"></a></h2><p>Equivariant linear operators are our building blocks. Equivariance means a rotation of the input results in the same rotation of the output thus preserving symmetry. Applying a linear operator convolves the input with the operator&#39;s kernel. If the operator is also equivariant, then its kernel must be radially symmetric. Differential operators and Green&#39;s functions are in fact equivariant linear operators. We provide built in constructors for these common operators.