Re: solvers for elliptic equations with dominant lower order terms

Unfortunately, James notified me offline of a breakage in PyTrilinos on Macs. I need to find time to debug. - Jon > On Jun 1, 2017, at 11:37 AM, Daniel Wheeler wrote: > > Hi James, > > I don't have any hints for preconditioners, but using Trilinos's GMRES > and

Re: solvers for elliptic equations with dominant lower order terms

James, can you perhaps send the FipY code for one of these equations, or a similar variant of it? Thanks! Sergio Sergio Manzetti [ http://www.fjordforsk.no/logo_hr2.jpg ] [ http://www.fjordforsk.no/ | Fjordforsk AS ] [ http://www.fjordforsk.no/ | ] Midtun 6894 Vangsnes Norge

Re: solvers for elliptic equations with dominant lower order terms

Hi James, I don't have any hints for preconditioners, but using Trilinos's GMRES and then systematically changing the GMRES parameters and preconditioners might help you find one that works. I have done this in the past, for example,