This paper analyzes a two-level algorithm for the weak Galerkin (WG) finite element methods based on local Raviart-Thomas (RT) and Brezzi-Douglas-Marini (BDM) mixed elements for twoand three-dimensional diffusion problems with Dirichlet condition. We first show the condition numbers of the stiffness matrices arising from the WG methods are of O(h−2). We use an extended version of the Xu-Zikatan...

Users can also choose from a multitude of optimization objectives, reaching from minimizing average runtime to maximizing median approximation qualities. ParamILS then executes algorithm A with different combinations of parameters on instances sampled from S, searching for the configuration that yields overall best performance across the benchmark problems. For details, see Frank Hutter, Holger...