preconditioner for matrix-free linear system
yongcheng.zhou at gmail.com
Tue Apr 14 13:04:53 CDT 2009
I want to link my own package with PETSc in order to make use of its
various preconditioners. I am using
matrix free method, so that I can directly refer the large matrix
saved in my own format. The connection
works OK without preconditioners, but runs into trouble when most of
the preconditioners is called.
For example, I got this message when using PCICC preconditionder:
Matrix format shell does not have a built-in PETSc direct solver!
So my question is how to utilize PETSc's powerful preconditioners for
my matrix-free application.
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