Stencil surrogate kernels
It would be a nice feature if we were able to generate a stencil surrogate kernel that at each DoF applies a stencil with weights that are computed from surrogate polynomials.
This issue shall collect the items that need to be checked such that we get a working implementation.
-
access to stencil neighborhood (as opposed to only having access to DoFs of a local element) -
(incremental) polynomial evaluation (e.g., Horner scheme) -
integration into generation pipeline (where to put the kernel?)