Comment 9 for bug 927539

I don't like the look of this. It's mixing a linear algebra issue
(PETSc bug?) with the assembler. Moreover, it will be horrendously
slow if the diagonal has not been allocated during the initialisation
of the matrix.

There is a suggestion in the thread to make the sparsity pattern
contain the diagonal entry, which seems a reasonable option, but there
is not answer on whether this solves the problem. Would it solve the
problem?

Garth

On 9 May 2012 06:05, Cian Wilson <email address hidden> wrote:
> ** Patch added: "diag.diff"
>   https://bugs.launchpad.net/dolfin/+bug/927539/+attachment/3137879/+files/diag.diff
>
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> https://bugs.launchpad.net/bugs/927539
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> Title:
>  Missing diagonals after subdomain assembly
>
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