Dear all,
I have tried on some ill-conditioned(indefinite actually) matrices some
iterative solutions first with minres of Matlab. Matlab converged in
something like 30 iterations to some reasonable tolerances, say 1e-5,
without any preconditioner. However, the same matrices did not converge
Umut,
Send one of the matrices with this behavior to petsc-maint at mcs.anl.gov
and we'll see what is going on. Also in that email tell use exactly
how you run it in Matlab.
Barry
On Apr 7, 2010, at 5:58 PM, Umut Tabak wrote:
Dear all,
I have tried on some
