An important part of a FEM solver is choosing a nodal set that avoids Runge’s phenomenon. In Hesthaven and Warburton’s book “Nodal Discontinuous Galerkin Methods”, they use warp and blend points to find a nodal distribution that attempts to minimize the lebesque constant.

My question is, what nodal distribution is used in Fenics? I’m having trouble finding this information. In the book it states that “we hope to expand the collection of quadrature rules and provide more

advanced point distributions, such as Warburton’s warp-blend points”, but I don’t see where it is stated what point distributions are actually used.

Thank you!