On Wed, Oct 10, 2018 at 8:41 PM Moritz Cygorek wrote:
> Thank you very much. Apparently, I've misunderstood what the filter
> actually does. I thought about the much simpler process, where you
> diagonalize
>
>
> -(A- tau*I)^2 +offset*I
>
>
> where tau is my target an offset is large enough so
Thank you very much. Apparently, I've misunderstood what the filter actually
does. I thought about the much simpler process, where you diagonalize
-(A- tau*I)^2 +offset*I
where tau is my target an offset is large enough so that the global maximum is
reached for eigenvalues around tau. Then
This type of method requires a very high degree polynomial; suggest using
degree=100 at least (this is the default value), but larger values may be
necessary. Also, for this particular filter the "range" must be approximately
equal to the numerical range; if you have no clue where your first
Thank you for the fast reply.
I've tried running my program (using the defaul Krylov-Schur method for sparse
MPI matrices) with the additional options:
-st_type filter -st_filter_degree 2 -st_filter_interval 2.,2.7
-st_filter_range -2000,2000
and I get the following error message:
> El 10 oct 2018, a las 19:54, Moritz Cygorek escribió:
>
> Hi,
>
> in the list of changes to SLEPc version 3.8, it is stated that there is a
> preliminary implementation of polynomial filtering using STFILTER.
>
> Because I am struggling to obtain interior eigenvalues and harmonic
>
Hi,
in the list of changes to SLEPc version 3.8, it is stated that there is a
preliminary implementation of polynomial filtering using STFILTER.
Because I am struggling to obtain interior eigenvalues and harmonic extraction
seems not to be stable enough in my case, I wanted to give it a try,
BTW, if I move the source file to:
petsc-3.10.2/src/dm/impls/plex/examples/tutorials
Using the makefile there, it compiles just fine.
Ling
From: petsc-users on behalf of Ling Zou
Sent: Wednesday, October 10, 2018 10:35:37 AM
To: PETSc users list
Subject:
Hi All,
I am starting playing with DMPlex, but get this error:
error: ‘DMSetSection’ was not declared in this scope
However, other DMPlex basic functions work just fine, e.g.,
DMPlexCreateFluentFromFile
DMPlexCheckSymmetry
DMPlexCheckSkeleton
DMPlexCheckFaces
DMPlexGetChart
On Wed, Oct 10, 2018 at 8:50 AM Yingjie Wu wrote:
> Thank you very much, Matt.
> I followed your advice and learned some MATMFFD related functions. Since
> I really wanted to use the Matrix-Free method, I learned the few examples
> of this method. I would like to enhance my understanding of the
Thank you very much, Matt.
I followed your advice and learned some MATMFFD related functions. Since I
really wanted to use the Matrix-Free method, I learned the few examples of
this method. I would like to enhance my understanding of the Matrix-Free
method in PETSc according to my questions about
On Wed, Oct 10, 2018 at 3:38 AM Ale Foggia wrote:
> Jed, Jose and Matthew,
> I've finally managed to make massif (it gives pretty detailed information,
> I like it) work in the correct way in the cluster and I'm able to track
> down the memory consumption, and what's more important (for me), I
Jed, Jose and Matthew,
I've finally managed to make massif (it gives pretty detailed information,
I like it) work in the correct way in the cluster and I'm able to track
down the memory consumption, and what's more important (for me), I think
now I'm able to make a more accurate prediction of the
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