[petsc-users] MatSetValues: reorder the values

[Mohammad Mirzadeh]

> Of course, this new function sounds unnecessary because reordering v is equivalent to reordering
> idxm[] and idxn[].  But the second method seems not an easy task to me, is it?


Why not use a single AO object to hold the mapping between PETSc mapping
and your maping? Seems to me that the indecies used in v[]
are completely arbitrary; they should always go in [0,1,...,m*n], don't
they?
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