On Thu, Jun 23, 2011 at 12:18, Juha J?ykk? <juhaj at iki.fi> wrote: > I was expecting that, but the equation is rather long to write in ascii. I > do > have a latex version somewhere that I can send if necessary. It is horribly > nonlinear, though, including a term like (d/dx f) * (d^2/dx^2) f. >
What physical system does it represent and what sort of discretization are you using? Do you know that the equations have a solution for all values of the parameter? Even simple problems may not have solutions for all values of a parameter, or they may be non-unique. For example, see the diagram for the Bratu problem on page 2 here: http://www.nada.kth.se/kurser/kth/2D1290/comp03_3.pdf -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20110623/cee69d03/attachment.htm>
