Re: Solving a large sparse system with a single dense row/column?

On May 9, 1:47 am, Alois Steindl <Alois.Stei...@xxxxxxxxxxxx> wrote:

Hello,
this case and the transposed one are quite trivial, but if there is a
full row and full column, then renumbering doesn't help much and you
need a different method.
Regards
Alois

Yes, I should have been more specific: my system has a dense column
*and* a dense row. I.e., the matrix looks somewhat like this:

/ \
| x x |
| x x |
| x x |
| x x |
| x x |
| x x |
| x x x x x x x |
\ /

(though in reality there are more off-diagonal entries and the system
may have blocks that are not symmetric).
Sorry for the confusion,

Trevor
.