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Patrick Sanan

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linear-algebra

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Summary Answers Questions Tags Badges Bookmarks Bounties Reputation All actions

21 Bookmarks

Votes Activity Newest Views Added
46
votes
4
answers
24k
views

What makes Fortran fast?

performance fortran languages
Dec 19 '15 at 13:06 aterrel 3,474
38
votes
4
answers
32k
views

How does the MATLAB backslash operator solve $Ax=b$ for square matrices?

linear-algebra performance matlab
Mar 2 '12 at 9:19 F'x 501
31
votes
9
answers
5k
views

Modern resources for learning FEM

finite-element reference-request
Sep 9 '16 at 18:22 Hosein Rahnama 111
28
votes
5
answers
4k
views

Are there any famous problems/algorithms in scientific computing that cannot be sped up by parallelisation

parallel-computing
May 27 '17 at 14:02 Jakub Klinkovský 442
27
votes
2
answers
13k
views

Why is my iterative linear solver not converging?

linear-algebra petsc preconditioning krylov-method iterative-method
Jan 7 '12 at 1:29 Community♦ 1
19
votes
2
answers
13k
views

What is pseudo time-stepping?

pde time-integration
May 7 '13 at 17:22 Shainath 449
17
votes
4
answers
5k
views

Portable multicore/NUMA memory allocation/initialization best practices

performance memory-management multicore
Dec 19 '13 at 10:13 eoinbrazil 111
17
votes
5
answers
3k
views

What is the advantage of multigrid over domain decomposition preconditioners, and vice versa?

pde multigrid preconditioning domain-decomposition
Jan 10 '12 at 9:31 Community♦ 1
15
votes
1
answer
2k
views

Can a Krylov subspace method be used as a smoother for multigrid?

linear-algebra multigrid iterative-method krylov-method
Jan 17 '12 at 15:13 Jed Brown 24.8k
15
votes
1
answer
676
views

What is the current state of polynomial preconditioners?

iterative-method preconditioning krylov-method
Dec 19 '12 at 13:59 shuhalo 3,350
13
votes
1
answer
1k
views

How is Krylov-accelerated Multigrid (using MG as a preconditioner) motivated?

linear-algebra linear-solver multigrid krylov-method
Mar 14 at 18:28 Patrick Sanan 808
13
votes
2
answers
975
views

Impose the compatibility conditions for mixed finite elements method in Stokes equation

finite-element
Sep 15 '12 at 15:51 shuhalo 3,350
11
votes
2
answers
2k
views

Understanding the cost of adjoint method for pde-constrained optimization

optimization pde
Jul 25 '14 at 20:43 Geoff Oxberry 29.2k
11
votes
1
answer
908
views

Smallest eigenvalue without inverse

linear-algebra eigensystem eigenvalues iterative-method
Jan 4 '16 at 18:08 Community♦ 1
10
votes
1
answer
3k
views

Raviart-Thomas elements on reference square

pde finite-element
Jun 11 '16 at 15:19 Christian Clason 11.6k
10
votes
3
answers
3k
views

How to construct a prolongation and restriction operator for an algebraic multigrid solver?

linear-algebra multigrid
Feb 13 '12 at 14:34 Community♦ 1
9
votes
1
answer
312
views

Iterative “solver” for $x^t \Sigma^{-1} x$

linear-algebra numerical-analysis iterative-method
Oct 13 '15 at 19:43 Wolfgang Bangerth 46.3k
8
votes
1
answer
877
views

MPI policy for multiple asynchronous transfers

parallel-computing software mpi
Aug 4 '13 at 15:17 Jed Brown 24.8k
4
votes
1
answer
415
views

$L^2$-error in FEM: how to compute integral over reference element?

finite-element error-estimation l2-norm
Dec 16 '16 at 18:52 wrong_path 394
4
votes
1
answer
265
views

Is PETSc's DMDA relying on undefined behavior?

petsc
Oct 4 '13 at 14:56 Jed Brown 24.8k
3
votes
1
answer
580
views

Numerical integration with singularities

quadrature scipy
Sep 10 '15 at 16:46 Kirill 11.2k
Computational Science
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