On 11/01/2011 04:10 PM, Roy Stogner wrote: > > On Tue, 1 Nov 2011, David Knezevic wrote: > >> One thought is that I've always thought that ex17 was a bit strange >> since we're looking for >> >> sup_v a(v,v) / m(v,v) >> >> which is unbounded as h --> 0. Perhaps things are more fragile >> because of this high-frequency mode? Does ex17 work with complex >> numbers if you uncomment the line: >> >> eigen_system.eigen_solver->set_position_of_spectrum(SMALLEST_MAGNITUDE); > > Still fails for me. > > As I'd expect it to, I think. Even with an ill-defined > infinite-dimensional problem, we ought to be getting something vaguely > resembling the highest frequency mode capturable by the mesh for the > discretized problem.
OK, no big deal. Yeah, we do get an approximation to the highest frequency mode on the mesh in the real case. I just thought that changing to the lowest mode would make the problem "easier" and let us see if slepc is more fragile in the complex case... ------------------------------------------------------------------------------ RSA® Conference 2012 Save $700 by Nov 18 Register now! http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
