[petsc-users] A question on Schur complement

Jed Brown jed at jedbrown.org
Fri Jan 26 16:35:05 CST 2018

saturday luis <luis.saturday at gmail.com> writes:

> Thanks, Jed.
> It seems that MatCreateLRC requires two dense matrices for U and V
> according to the page
> http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Mat/MatCreateLRC.html
> Not sure if it is applicable to sparse matrices.

Oops, I thought the implementation did not rely on that property, but in
fact it does.

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