[petsc-dev] Copy *SNES-struct deeply

[Jed Brown]

On Mon, Mar 4, 2013 at 10:13 AM, Barry Smith <bsmith at mcs.anl.gov> wrote:

>    I am still deeply puzzled, why would you solve the "exact" same system
> again, surely something must be changed for the next time you solve it?


When computing transient adjoints, the entire history cannot typically be
stored, so you checkpoint and incrementally recompute while following the
adjoint backward in time. However, the method used to solve the system
would not matter, provided that you have a scenario where if the solver
converges, it converges to a unique solution.
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