Missing triangle functionality (Laplacian, restriction)

[TSGut]

Am I correct in believing that the Laplacian and edge restriction operators on the triangle have not been implemented in the ClassicalOPs version? I distinctly remember that functionality working in ApproxFun.

[TSGut]

Essentially the functionality in https://github.com/JuliaApproximation/MultivariateOrthogonalPolynomials.jl/blob/master/test/test_dirichlettriangle.jl which still is in ApproxFun form.

[dlfivefifty]

I don’t think DirichletTriangle has been implemented

I think I’m hoping to make it defined in terms of Sobolev or negative parameters…