Open ranocha opened 2 years ago
For corresponding second-derivative operators for general function spaces, see https://arxiv.org/abs/2306.16314 ("Summation-by-parts operators for general function spaces: The second derivative").
See also https://arxiv.org/abs/2405.08770 (An optimization-based construction procedure for function space based summation-by-parts operators on arbitrary grids)
There is some code online at https://github.com/phioeffn/SBP-Construction. However, it doesn't have a license, so we cannot do anything with it (and should avoid looking at it at all...)
See https://arxiv.org/abs/2203.05479
and https://arxiv.org/abs/2204.03291 ("Energy-stable global radial basis function methods on summation-by-parts form")