[petsc-users] Guidance on using Tao for unconstrained minimization

[Jed Brown]

Could you share output for your current configuration with -tao_monitor -tao_ls_monitor -tao_view?

"Ellen M. Price" <ellen.price at cfa.harvard.edu> writes:

> Hello PETSc users!
>
> I am using Tao for an unconstrained minimization problem. I have found
> that CG works better than the other types for this application. After
> about 85 iterations, I get an error about line search failure. I'm not
> clear on what this means, or how I could mitigate the problem, and
> neither the manual nor FAQ give any guidance. Can anyone suggest things
> I could try to help the method converge? I have function and gradient
> info, but no Hessian.
>
> Thanks,
> Ellen Price