[petsc-users] Spatial distribution of the residual after an implicit TS timestep

[Jed Brown]

Mani Chandra <mc0710 at gmail.com> writes:

> Is there anyway I can get the residual at the beginning of the time step? I
> tried TSSetPreStage and TSSetPreStep but they didn't work. Setting
> TSSetPreStage would crash the program even if there is nothing in the
> routine that I set and TSSetPreStep would give me the residual at the end
> of the previous time step. I want to take a look at the residual at the
> beginning of the new time step before the nonlinear solver starts.

Residual of what?  What are you going to do with it?
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