Am 03.02.2012 13:43, schrieb Jed Brown: > How did you order dofs? Node-wise, thus the first three unknows are the three dofs of the first mesh node, and so on. > > How are the blocks coupled? The system writes
L 0 M M L 0 L M L With L = discrete laplace, M = mass matrix, 0 = empty matrix > > AMG is more delicate and generally less robust for systems. Is this different with geometric multigrid? Thomas
