For the MatSetValuesStencil, should it always work in pair with DMCreateMatrix?
However, in some example, e.g., src/ksp/ksp/examples/tutorials/ex25.c, the DMCreateMatrix is never called. Is it because KspSetComputeOperators is used and DMCreateMatrix is called implicitly somewhere? Thank you. Xiangdong On Tue, Feb 25, 2014 at 2:35 PM, Jed Brown <[email protected]> wrote: > Matthew Knepley <[email protected]> writes: > > SNES ex19 uses 4 dof and is much simpler. > > Yes, but it doesn't insert matrix entries. >
