Re: [deal.II] Re: Some changes in arpack.h (Functionality to compute only eigenvalues)

Animesh, Sorry for the slow reply. Le lun. 11 janv. 2021 à 12:40, Animesh Rastogi IIT Gandhinagar a écrit : >> Response - I am not using Trilinos vectors. I am using normal BlockVectors >> and BlockSparseMatrix from dealii Linear Algebra class. Is it possible for >> me to convert my

Re: [deal.II] Re: Some changes in arpack.h (Functionality to compute only eigenvalues)

Hi Bruno, Probably my above message got lost somewhere in the conversations of this group. Thought to remind you regarding my query in this thread. Let me know if you need more information regarding my queries. Thanks a lot! Animesh On Tuesday, December 29, 2020 at 6:44:35 PM UTC+5:30

Re: [deal.II] Re: Some changes in arpack.h (Functionality to compute only eigenvalues)

Hi Bruno, It's not in deal.II. Anasazi is part of Trilinos. If you are using > Trilinos vector, it's pretty straightforward. You just copy the code > from > https://github.com/ORNL-CEES/mfmg/blob/master/include/mfmg/dealii/anasazi.templates.hpp > > The solver is used here: > >

Re: [deal.II] Re: Some changes in arpack.h (Functionality to compute only eigenvalues)

Le mer. 16 déc. 2020 à 04:55, Animesh Rastogi IIT Gandhinagar a écrit : > > Thank you Bruno for your suggestion. I tried in regular mode and it doesn't > seem to improve the accuracy. The results are approximately the same as I was > getting using the shift-invert method. > > One thing that I

Re: [deal.II] Re: Some changes in arpack.h (Functionality to compute only eigenvalues)

Thank you Bruno for your suggestion. I tried in regular mode and it doesn't seem to improve the accuracy. The results are approximately the same as I was getting using the shift-invert method. One thing that I didn't understand is that I used the scipy function "eigs" in python

Re: [deal.II] Re: Some changes in arpack.h (Functionality to compute only eigenvalues)

Animesh, You need to download the patch to the deal.II directory. If you cloned deal.II, you can simply use git apply 0001-Enable-ARPACK-in-regular-mode.patch. If you didn't use git to get deal.II, I think patch -i 0001-Enable-ARPACK-in-regular-mode.patch should work. I have also noted that

[deal.II] Re: Some changes in arpack.h (Functionality to compute only eigenvalues)

Hi Bruno, I would like to use this patch to compute the smallest eigenvalues in my case. Could you please let me know how should I update my source code in the arpack.h header file to accommodate

[deal.II] Re: Some changes in arpack.h (Functionality to compute only eigenvalues)

Thank you Bruno, I was able to change the source code accordingly. I reinstalled dealii and it worked fine! Thanks again! Animesh On Friday, November 6, 2020 at 3:55:29 AM UTC+5:30 bruno.t...@gmail.com wrote: > Animesh, > > On Thursday, November 5, 2020 at 1:11:33 PM UTC-5 >

[deal.II] Re: Some changes in arpack.h (Functionality to compute only eigenvalues)

Animesh, On Thursday, November 5, 2020 at 1:11:33 PM UTC-5 animesh...@alumni.iitgn.ac.in wrote: > However, I have no way of passing it as a parameter to the solver > > > function. I was