[petsc-users] Question on DMMGSetSNESLocal from snes/example/tutorials/ex19.c

[Jed Brown]

Barry Smith <bsmith at mcs.anl.gov> writes:
>So make all the “extra” equations be simply f.v[i][j] = x.v[i][j] (or
>x.p or x.u depending on where) and put a 1 on the diagonal of that
>row/column of the Jacobian).

This would typically be f[j][i].v = x[j][i].v, etc.
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