On 01/12/2015 05:58 PM, Matthew Knepley wrote:
On Mon, Jan 12, 2015 at 10:57 AM, Umut Tabak <[email protected]
<mailto:[email protected]>> wrote:
On 01/12/2015 04:29 PM, Matthew Knepley wrote:
Fieldsplit block preconditioners can be used on this type of
matrix, but success obviously depends on the
analytic character of the operators. In particular, if we
assume that we have great PCs for the diagonal,
then B is the most important variable, and we need to know
what the Schur complement
Dear Matt,
Thanks, I have a bit of difficult time understanding what you mean
by ¨great PCs¨ for the diagonal? Could you please rephrase it?
My impression was that you knew how to solve the diagonal blocks, but
not the full system.
Thx for the swift reply, well, you mean directly or iteratively? I
looked a bit more but I am not sure if that is possible iteratively or
not, I guess it is not since the character of the blocks on the diagonal
are not well suited to iterative solution techniques. Maybe I should
look into field split documentation once more.
Thx,
Umut
