Dear all,
I have a question on the PETSc option '-snes_mf_operator'.
I am reading thePETSc Users Manual Revision 3.3. On page 100, 2nd
paragraph, it says:
==
However, it allows us to check the analytic Jacobian we
On Thu, Sep 27, 2012 at 2:01 PM, Zou (Non-US), Ling ling.zou at inl.govwrote:
Dear all,
I have a question on the PETSc option '-snes_mf_operator'.
I am reading thePETSc Users Manual Revision 3.3. On page 100, 2nd
paragraph, it says:
Thank you Matt.
I've noticed that there is a different option '-snes_fd', and I guess PETSc
will use finite difference method for both Jacobian (action) and
Preconditioner?
By the way, do you have any comments on my another question?
One more question, if I pass '-snes' to
On Thu, Sep 27, 2012 at 2:13 PM, Zou (Non-US), Ling ling.zou at inl.govwrote:
Thank you Matt.
I've noticed that there is a different option '-snes_fd', and I guess
PETSc will use finite difference method for both Jacobian (action) and
Preconditioner?
-snes_fd uses FD to create the entire
On Thu, Sep 27, 2012 at 1:22 PM, Matthew Knepley knepley at gmail.com wrote:
On Thu, Sep 27, 2012 at 2:13 PM, Zou (Non-US), Ling ling.zou at
inl.govwrote:
Thank you Matt.
I've noticed that there is a different option '-snes_fd', and I guess
PETSc will use finite difference method for both
Thanks again, Matt. Your answers are really helpful to me.
Best,
Ling
On Thu, Sep 27, 2012 at 12:22 PM, Matthew Knepley knepley at gmail.com wrote:
On Thu, Sep 27, 2012 at 2:13 PM, Zou (Non-US), Ling ling.zou at
inl.govwrote:
Thank you Matt.
I've noticed that there is a different
Thank you Dmitry.
Yes, I am now fully understanding what '-snes_mf' and '-snes_mf_operator'
are doing. Got a bit confused by the '-snes' keyword used in Moose. As you
mentioned, this is for input completeness sake, so I guess there are
default options as this keyword is used. I will dig out what
