which solvers do you think I can examin and see if they can be used
instead of SolverCG?
That's the wrong question. If you know that the matrix you have *should be*
symmetric and positive definite, but the CG solver does not converge, then you
need to debug why the matrix *is not* s.p.d. Using a different solver might
allow you to solve the linear system, but since the linear system is
apparently not the correct one, the solution will also not be correct.
Best
W.
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Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
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