[petsc-users] Determine the positive definiteness

[w_ang_temp]

Hello,

    I want to determine the positive definiteness. So I want to know

if it is a right way.

    I use "-ksp_type cg -pc_type none". You know, CG does not work for

indefinite matrices. I get "Linear solve did not converge due to

DIVERGED_INDEFINITE_MAT". From the information, I think it is indefinite.

Is it a right way?

    Thanks.

                                            Jim
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