The homogeneous one-speed neutron transport equation in plane geometry can be solved using a separation of variables technique. In the case of isotropic scattering and a sub-critical system, it is well known [15,5] that there are exactly two discrete eigenvalues with opposite sign associated to...

Recent advances have shown that block recursive approximate factorizations provide among the best preconditioners for solving elasticity equations on large 3D meshes such as arising in geomechanical applications. However, to get full efficiency of these methods, a wide range of implementation...