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Paras Kumar
, …
Bruno Turcksin
5
2/26/20
Q&A
Shared Memory Parallel Linear Solver
Paras, Le mer. 26 févr. 2020 à 12:27, Paras Kumar <parasku...@gmail.com> a écrit : >
unread,
linear_algebra
multithreading
Q&A
Shared Memory Parallel Linear Solver
Paras, Le mer. 26 févr. 2020 à 12:27, Paras Kumar <parasku...@gmail.com> a écrit : >
2/26/20
Prashant Singh
,
Wolfgang Bangerth
3
12/17/19
Q&A
DOF Renumbering & Creation of Block Matrices
Dear Bangerth, Thank you very much. Regards Prashant On Monday, December 16, 2019 at 11:29:12 PM UTC+
unread,
linear_algebra
Q&A
DOF Renumbering & Creation of Block Matrices
Dear Bangerth, Thank you very much. Regards Prashant On Monday, December 16, 2019 at 11:29:12 PM UTC+
12/17/19
Doug Shi-Dong
2
12/24/19
Q&A
Converting LinearAlgebra::distributed::Vector to TrilinosWrappers::MPI::Vector
Replying to my own post since I found the solution in case someone else ever encounters this. It was
unread,
linear_algebra
trilinos
Q&A
Converting LinearAlgebra::distributed::Vector to TrilinosWrappers::MPI::Vector
Replying to my own post since I found the solution in case someone else ever encounters this. It was
12/24/19
vachan potluri
, …
Matthias Maier
5
11/25/19
Q&A
Is a call to compress() required after scale()?
On Mon, Nov 25, 2019, at 00:23 CST, vachan potluri <vachanpo...@gmail.com> wrote: > I
unread,
linear_algebra
mpi
Q&A
Is a call to compress() required after scale()?
On Mon, Nov 25, 2019, at 00:23 CST, vachan potluri <vachanpo...@gmail.com> wrote: > I
11/25/19
Bruno Blais
,
Wolfgang Bangerth
5
9/4/19
Q&A
Difference between BlockDynamicSparsityPattern and TrilinosWrappers::BlockSparsityPattern
Dear Wolfgang, Thank you, everything is clear now and i managed to accomplish what I wanted. Thanks!
unread,
linear_algebra
mpi
trilinos
Q&A
Difference between BlockDynamicSparsityPattern and TrilinosWrappers::BlockSparsityPattern
Dear Wolfgang, Thank you, everything is clear now and i managed to accomplish what I wanted. Thanks!
9/4/19
Bruno Blais
,
Daniel Arndt
2
8/29/19
Q&A
Solving a TrilinosWrappers::BlockSparseMatrix using Trilinos iterative solver (step-57)
Bruno, I am currently trying to work on a "HPC-ready with Trilinos" version of step-57 for
unread,
fluid_mechanics
linear_algebra
trilinos
Q&A
Solving a TrilinosWrappers::BlockSparseMatrix using Trilinos iterative solver (step-57)
Bruno, I am currently trying to work on a "HPC-ready with Trilinos" version of step-57 for
8/29/19
Franco Milicchio
,
Wolfgang Bangerth
3
8/1/19
Q&A
Step 31: Preconditioner correspondence
Preconditioner design is hard -- which is why I've recorded 4 or so lectures on the topic ;-)
unread,
linear_algebra
tutorials
Q&A
Step 31: Preconditioner correspondence
Preconditioner design is hard -- which is why I've recorded 4 or so lectures on the topic ;-)
8/1/19
Andreas Hegendörfer
, …
Anton Ermakov
6
9/17/21
Q&A
Eigenproblem and creating a preconditioner out of a linear operator, Eigensolver Selection
Dear Daniel, I am working on a similar problem (planetary acoustic oscillations). I am interested in
unread,
eigen_problem
linear_algebra
multigrid
Q&A
Eigenproblem and creating a preconditioner out of a linear operator, Eigensolver Selection
Dear Daniel, I am working on a similar problem (planetary acoustic oscillations). I am interested in
9/17/21
Félix Bunel
,
Wolfgang Bangerth
4
6/29/19
Q&A
Augmented Lagrangian Method for Asymetric Stokes Problem
On 6/28/19 6:36 AM, Félix Bunel wrote: > > I tried a direct solver and it sucessfully solved my
unread,
fe_spaces
fluid_mechanics
linear_algebra
time_integration
tutorials
Q&A
Augmented Lagrangian Method for Asymetric Stokes Problem
On 6/28/19 6:36 AM, Félix Bunel wrote: > > I tried a direct solver and it sucessfully solved my
6/29/19
Dhananjay Phansalkar
,
Jean-Paul Pelteret
2
6/11/19
Q&A
libraries for line search
Dear Dhananjay, We have a family of line search algorithms implemented in the LineMinimization
unread,
linear_algebra
Q&A
libraries for line search
Dear Dhananjay, We have a family of line search algorithms implemented in the LineMinimization
6/11/19
Bruno Blais
, …
Jean-Paul Pelteret
12
4/3/19
Q&A
Controllins fill-in, abs. tol and rel. tol or smoother and coarse solver of TrilinosWrappers::PreconditionAMG
Dear Bruno, Thanks a lot for the positive feedback! I'm really glad to know that those changes
unread,
linear_algebra
trilinos
Q&A
Controllins fill-in, abs. tol and rel. tol or smoother and coarse solver of TrilinosWrappers::PreconditionAMG
Dear Bruno, Thanks a lot for the positive feedback! I'm really glad to know that those changes
4/3/19
Bruno Blais
, …
Wolfgang Bangerth
9
3/8/19
Q&A
Solving a system defined up to a constant (stabilized Navier-Stokes pressure definition)
On Thursday, 7 March 2019 23:35:15 UTC-5, Wolfgang Bangerth wrote: On 3/7/19 7:45 AM, Bruno Blais
unread,
fluid_mechanics
laplace_poisson
linear_algebra
Q&A
Solving a system defined up to a constant (stabilized Navier-Stokes pressure definition)
On Thursday, 7 March 2019 23:35:15 UTC-5, Wolfgang Bangerth wrote: On 3/7/19 7:45 AM, Bruno Blais
3/8/19
Bruno Blais
,
Wolfgang Bangerth
2
2/12/19
Q&A
Choosing the appropriate parameters for TrilinosWrappers::PreconditionILU for GLS stabilized Navier-Stokes
On 2/12/19 6:01 AM, Bruno Blais wrote: > > The documentation suggest an atol between 1e-2 and
unread,
fluid_mechanics
linear_algebra
trilinos
Q&A
Choosing the appropriate parameters for TrilinosWrappers::PreconditionILU for GLS stabilized Navier-Stokes
On 2/12/19 6:01 AM, Bruno Blais wrote: > > The documentation suggest an atol between 1e-2 and
2/12/19
giovann...@hotmail.it
,
Bruno Turcksin
5
1/3/19
Q&A
Operations between sparse matrices with incompatible IndexSets
The version I am using is the developeing one, maybe a couple of days old, so it should work...Thank
unread,
linear_algebra
mpi
multigrid
multithreading
trilinos
Q&A
Operations between sparse matrices with incompatible IndexSets
The version I am using is the developeing one, maybe a couple of days old, so it should work...Thank
1/3/19
RAUNAK
, …
Denis Davydov
3
6/8/18
Q&A
Exception Encountered in sparse_direct.cc [screen shot attached]
Hi Raunak, Did you by any chance forgot to apply Dirichlet boundary conditions (this will influence
unread,
basics
bug
linear_algebra
Q&A
Exception Encountered in sparse_direct.cc [screen shot attached]
Hi Raunak, Did you by any chance forgot to apply Dirichlet boundary conditions (this will influence
6/8/18
David Emerson
,
Wolfgang Bangerth
3
4/21/18
Q&A
Accessing Q in Householder Decomposition
Hi Wolfgang, Thank you for the response and taking a look at the algorithm. I'll see if I can use
unread,
linear_algebra
Q&A
Accessing Q in Householder Decomposition
Hi Wolfgang, Thank you for the response and taking a look at the algorithm. I'll see if I can use
4/21/18
Feimi Yu
, …
Weixiong Zheng
8
4/8/18
Q&A
Reason for SolverGMRES being slower in parallel?
Hi Weixiong, I did consider this problem so I wanted to avoid using a fake ILU like BlockJacobi. As I
unread,
linear_algebra
petsc
Q&A
Reason for SolverGMRES being slower in parallel?
Hi Weixiong, I did consider this problem so I wanted to avoid using a fake ILU like BlockJacobi. As I
4/8/18
Feimi Yu
,
Wolfgang Bangerth
13
3/21/18
Q&A
Iterating over all the entries in a PETScWrapper::MPI::SparseMatrix in parallel
Got it. Thank you so much! Thanks, Feimi On Wednesday, March 21, 2018 at 10:51:24 AM UTC-4, Wolfgang
unread,
linear_algebra
mpi
petsc
Q&A
Iterating over all the entries in a PETScWrapper::MPI::SparseMatrix in parallel
Got it. Thank you so much! Thanks, Feimi On Wednesday, March 21, 2018 at 10:51:24 AM UTC-4, Wolfgang
3/21/18
Lucas Campos
,
Wolfgang Bangerth
7
2/25/18
Q&A
Improvement of solver documentation
One addendum to my previous post. By Linear Solver module, I mean this page: https://www.dealii.org/
unread,
linear_algebra
suggestion
Q&A
Improvement of solver documentation
One addendum to my previous post. By Linear Solver module, I mean this page: https://www.dealii.org/
2/25/18
Marek Čapek
,
Bruno Turcksin
2
1/10/18
Q&A
dof renumbering on distributed meshes
Marek, Take a look here https://github.com/dealii/dealii/issues/5407 and here https://github.com/
unread,
linear_algebra
Q&A
dof renumbering on distributed meshes
Marek, Take a look here https://github.com/dealii/dealii/issues/5407 and here https://github.com/
1/10/18
Lucas Campos
, …
Jie Cheng
10
12/17/17
Q&A
PETSc Sparse LU Preallocation
Hi Lucas and Wolfgang I have something to say on this issue because I think it might be helpful to
unread,
linear_algebra
mpi
petsc
Q&A
PETSc Sparse LU Preallocation
Hi Lucas and Wolfgang I have something to say on this issue because I think it might be helpful to
12/17/17
Peimeng Yin
,
Wolfgang Bangerth
3
12/4/17
Q&A
sparse matrix multiplication
On 12/04/2017 12:43 PM, Wolfgang Bangerth wrote: > >> Can I figure out the pattern of B*B or
unread,
linear_algebra
Q&A
sparse matrix multiplication
On 12/04/2017 12:43 PM, Wolfgang Bangerth wrote: > >> Can I figure out the pattern of B*B or
12/4/17
Dimitris Ntogkas
,
Bruno Turcksin
5
11/28/17
Q&A
Conjugate Gradient for Schur complement, serial vs parallel discrepancy in solution and effect of tolerance.
Bruno, Yeah, this makes sense. Numerically that's what I observe too, some difference in the
unread,
linear_algebra
mpi
Q&A
Conjugate Gradient for Schur complement, serial vs parallel discrepancy in solution and effect of tolerance.
Bruno, Yeah, this makes sense. Numerically that's what I observe too, some difference in the
11/28/17
SebG
, …
Wolfgang Bangerth
9
12/5/17
Q&A
error in SolverFGMRES related destructor
On 12/05/2017 11:01 AM, SebG wrote: > > It works quite well for very low Reynolds number flows.
unread,
fluid_mechanics
linear_algebra
Q&A
error in SolverFGMRES related destructor
On 12/05/2017 11:01 AM, SebG wrote: > > It works quite well for very low Reynolds number flows.
12/5/17
Lucas Campos
, …
Timo Heister
9
11/30/17
Q&A
Errors when using MUMPS/PETSc LU
>> Then you have to simplify your problem as much as possible until we >> can reproduce
unread,
linear_algebra
mpi
multithreading
petsc
Q&A
Errors when using MUMPS/PETSc LU
>> Then you have to simplify your problem as much as possible until we >> can reproduce
11/30/17
Jie Cheng
, …
Wolfgang Bangerth
13
11/9/17
Q&A
A_inverse in step-57
Jie, > It turns out the SparseILU needs to be tuned very carefully. I set the > AdditioalData
unread,
linear_algebra
Q&A
A_inverse in step-57
Jie, > It turns out the SparseILU needs to be tuned very carefully. I set the > AdditioalData
11/9/17
Anna Avdeeva
,
Timo Heister
8
9/25/17
Q&A
PETScWrappers::SparseDirectMUMPS use in parallel version of step-22
Dear Timo, Sorry, I did not mean to write to your personal e-mail. Just pressed the wrong reply
unread,
linear_algebra
petsc
tutorials
Q&A
PETScWrappers::SparseDirectMUMPS use in parallel version of step-22
Dear Timo, Sorry, I did not mean to write to your personal e-mail. Just pressed the wrong reply
9/25/17
Nitish Anand
,
Jean-Paul Pelteret
4
8/24/17
Q&A
Multiply SparseMatrix and a Vector
In fact, that was the issue.. Works well now. :) Thanks ! On Thursday, August 24, 2017 at 4:21:59 PM
unread,
basics
linear_algebra
Q&A
Multiply SparseMatrix and a Vector
In fact, that was the issue.. Works well now. :) Thanks ! On Thursday, August 24, 2017 at 4:21:59 PM
8/24/17
Julian A
,
Jean-Paul Pelteret
7
5/30/17
Q&A
Expecting verbose output from AztecOO when using AdditionalData::output_solver_details
Hi Julian, Great! We're looking forward to your contribution :-) Best, JP On Tuesday, May 30,
unread,
linear_algebra
Q&A
Expecting verbose output from AztecOO when using AdditionalData::output_solver_details
Hi Julian, Great! We're looking forward to your contribution :-) Best, JP On Tuesday, May 30,
5/30/17
Jesse
,
Jean-Paul Pelteret
3
4/26/17
Q&A
How to provide the VectorMemory<BlockVector<double> > for the class SchurMatrix?
Dear Jean-Paul, Thank you very much for your help. This is exactly what I needed. My compiler support
unread,
linear_algebra
Q&A
How to provide the VectorMemory<BlockVector<double> > for the class SchurMatrix?
Dear Jean-Paul, Thank you very much for your help. This is exactly what I needed. My compiler support
4/26/17