On Apr 4, 2011, at 10:16 PM, Gong Ding wrote: > Hi, > I'd like to scaling the jacobian matrix as if the condition number can be > improved. > That is scaling J by Dl*J*Dr. The scaling diagonal matrix will be changed in > each nonlinear iteration. > Would this be in addition to building a preconditioner from the resulting scaled matrix? Or do you just want to use a symmetric Jacobi preconditioner?
Barry > Does SNES already exist some interface to do this? > > > > >
