Dear all, I have a problem using BiCGStab with right preconditioning.
Solving my system using gmres everything looks ok: 0 KSP preconditioned resid norm 4.490868831255e-04 true resid norm 4.490868831255e-04 ||Ae||/||Ax|| 6.402973612108e-01 1 KSP preconditioned resid norm 2.641616638766e-04 true resid norm 2.641616638766e-04 ||Ae||/||Ax|| 3.766353965541e-01 Solving it with bcgs, however, I got: 0 KSP preconditioned resid norm 4.490868831255e-04 true resid norm 1.222737120188e+01 ||Ae||/||Ax|| 1.743349407273e+04 1 KSP preconditioned resid norm 1.801799542022e-04 true resid norm 1.222736696074e+01 ||Ae||/||Ax|| 1.743348802582e+04 What could be wrong? Looking forward to your help, Kathrin
