Hi Jed,
Thanks for your reply. The assembled matrix I have corresponds to the full
problem on the full mesh. There are no "Neumann" problems (or any sort of
domain decomposition) defined in the code generates the matrix. However, I
think assembling the full problem is equivalent to implicitly
Did you assemble "Neumann" problems that are compatible with your
definition of interior/interface degrees of freedom?
Abdullah Ali Sivas writes:
> Dear all,
>
> I have a series of linear systems coming from a PDE for which BDDC is an
> optimal preconditioner. These linear systems are assembled
Dear all,
I have a series of linear systems coming from a PDE for which BDDC is an
optimal preconditioner. These linear systems are assembled and I read them
from a file, then convert into MATIS as required (as in
The Institute of Arctic and Alpine Research (INSTAAR) and Community
Surface Dynamics Modeling System (CSDMS) at the University of Colorado
invite applications for a tenure-track assistant professor position in
Computational Earth-Surface Process Modeling, with an August 2019
start. CSDMS is an
Correction:
OBJFILES = \
class1.o \
class2.o \
myprogram.o
Matt Overholt
On Tue, Oct 23, 2018 at 2:29 PM Matthew Overholt
wrote:
> Here is a sample makefile, like what I use with the Intel MPI compilers
> (used during PETSc configuration) and MKL library.
>
> Matt Overholt
>
>
Here is a sample makefile, like what I use with the Intel MPI compilers
(used during PETSc configuration) and MKL library.
Matt Overholt
-
#
# makefile for Linux using the Intel C++ Compiler, MKL & MPI libraries +
OpenMP
# usage: make
# or: make
On Tue, Oct 23, 2018 at 11:37 AM Yingjie Wu wrote:
> Dear Petsc developer:
> Hi,
> Thank you very much for your continuous help, I recently encountered some
> difficulties in developing programs on Petsc.
>
> 1. I want to use my class definition (class1. h) and class functions
> (class1. cpp)
Dear Petsc developer:
Hi,
Thank you very much for your continuous help, I recently encountered some
difficulties in developing programs on Petsc.
1. I want to use my class definition (class1. h) and class functions
(class1. cpp) files in my Petsc program (myprogram. c) and compile my
program. I
On Tue, Oct 23, 2018 at 10:53 AM Manav Bhatia wrote:
> Really interesting!
>
> So this is a limitation of the algorithm and not the implementation.
>
> The challenge is that the eigenvalue solution in my workflow is a small
> component of a large computation done with real numbers in an
Really interesting!
So this is a limitation of the algorithm and not the implementation.
The challenge is that the eigenvalue solution in my workflow is a small
component of a large computation done with real numbers in an optimization
problem. I could do the whole thing with complex
> El 23 oct 2018, a las 15:46, Ale Foggia escribió:
>
>
>
> El mar., 23 oct. 2018 a las 15:33, Jose E. Roman ()
> escribió:
>
>
> > El 23 oct 2018, a las 15:17, Ale Foggia escribió:
> >
> > Hello Jose, thanks for your answer.
> >
> > El mar., 23 oct. 2018 a las 12:59, Jose E. Roman ()
> El 23 oct 2018, a las 16:10, Manav Bhatia escribió:
>
> Thanks for the clarification.
>
> Does this also apply to the standard non-hermitian eigenvalue problem? Do I
> need to compile with complex numbers if I want to capture the complex
> eigenvalues? Or does it work with real number
On Tue, Oct 23, 2018 at 3:12 AM Josh L wrote:
> Hi,
>
> My FEM codes calculate the stress field on gauss point, but when I output
> the stress field, I want it to on vertex. My old codes find the gauss
> points that surround a vertex and calculate the average.
> Is there any better way to do it
Thanks for the clarification.
Does this also apply to the standard non-hermitian eigenvalue problem? Do I
need to compile with complex numbers if I want to capture the complex
eigenvalues? Or does it work with real number support?
Thanks
Manav
Sent from my iPhone
> On Oct 23, 2018, at 3:43
El mar., 23 oct. 2018 a las 15:33, Jose E. Roman ()
escribió:
>
>
> > El 23 oct 2018, a las 15:17, Ale Foggia escribió:
> >
> > Hello Jose, thanks for your answer.
> >
> > El mar., 23 oct. 2018 a las 12:59, Jose E. Roman ()
> escribió:
> > There is an undocumented option:
> >
> >
> El 23 oct 2018, a las 15:17, Ale Foggia escribió:
>
> Hello Jose, thanks for your answer.
>
> El mar., 23 oct. 2018 a las 12:59, Jose E. Roman ()
> escribió:
> There is an undocumented option:
>
> -bv_reproducible_random
>
> It will force the initial vector of the Krylov subspace to
Hello Jose, thanks for your answer.
El mar., 23 oct. 2018 a las 12:59, Jose E. Roman ()
escribió:
> There is an undocumented option:
>
> -bv_reproducible_random
>
> It will force the initial vector of the Krylov subspace to be the same
> irrespective of the number of MPI processes. This should
On Tue, Oct 23, 2018 at 6:24 AM Ale Foggia wrote:
> Hello,
>
> I'm currently using Lanczos solver (EPSLANCZOS) to get the smallest real
> eigenvalue (EPS_SMALLEST_REAL) of a Hermitian problem (EPS_HEP). Those are
> the only options I set for the solver. My aim is to be able to
> predict/estimate
There is an undocumented option:
-bv_reproducible_random
It will force the initial vector of the Krylov subspace to be the same
irrespective of the number of MPI processes. This should be used for scaling
analyses as the one you are trying to do.
An additional comment is that we strongly
Hello,
I'm currently using Lanczos solver (EPSLANCZOS) to get the smallest real
eigenvalue (EPS_SMALLEST_REAL) of a Hermitian problem (EPS_HEP). Those are
the only options I set for the solver. My aim is to be able to
predict/estimate the time-to-solution. To do so, I was doing a scaling of
the
If eigenvalues are complex then NLEIGS also needs to work in complex arithmetic
because it needs a region of the complex plane containing the wanted
eigenvalues. It seems that complex arithmetic is the only change in your
problem.
Jose
> El 22 oct 2018, a las 22:01, Manav Bhatia escribió:
>
Hi,
You may want to look at :
https://www.mcs.anl.gov/petsc/petsc-current/include/petsc/private/petscfeimpl.h.html#PetscFEInterpolate_Static
It only gives the structure of what you are looking for.
In order to use it, you have to use the FE implementation of Petsc, by
looking at the examples.
On Tue, 23 Oct 2018 at 02:24, Matthew Knepley wrote:
> On Mon, Oct 22, 2018 at 7:44 PM Andrew Ho wrote:
>
>> I have a specialized matrix structure I'm trying to take advantage of for
>> solving large scale (non)linear systems. I think for this purpose using a
>> Shell matrix is sufficient for
Hi,
My FEM codes calculate the stress field on gauss point, but when I output
the stress field, I want it to on vertex. My old codes find the gauss
points that surround a vertex and calculate the average.
Is there any better way to do it with DMPlex?
The PetscSF given by DMPlexDistribute has
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