Patrick Sanan
  • Member for 8 years, 11 months
  • Last seen more than a month ago
4 answers
50 votes
26k views
24 bookmarks
What makes Fortran fast?
4 answers
40 votes
33k views
33 bookmarks
How does the MATLAB backslash operator solve $Ax=b$ for square matrices?
9 answers
33 votes
5k views
34 bookmarks
Modern resources for learning FEM
5 answers
28 votes
5k views
12 bookmarks
Are there any famous problems/algorithms in scientific computing that cannot be sped up by parallelisation
2 answers
28 votes
14k views
24 bookmarks
Why is my iterative linear solver not converging?
2 answers
20 votes
13k views
6 bookmarks
What is pseudo time-stepping?
4 answers
18 votes
5k views
7 bookmarks
Portable multicore/NUMA memory allocation/initialization best practices
5 answers
18 votes
3k views
12 bookmarks
What is the advantage of multigrid over domain decomposition preconditioners, and vice versa?
1 answers
17 votes
2k views
10 bookmarks
Can a Krylov subspace method be used as a smoother for multigrid?
1 answers
15 votes
733 views
4 bookmarks
What is the current state of polynomial preconditioners?
1 answers
14 votes
1k views
5 bookmarks
How is Krylov-accelerated Multigrid (using MG as a preconditioner) motivated?
2 answers
14 votes
1k views
5 bookmarks
Impose the compatibility conditions for mixed finite elements method in Stokes equation
2 answers
11 votes
3k views
5 bookmarks
Understanding the cost of adjoint method for pde-constrained optimization
1 answers
11 votes
3k views
6 bookmarks
Raviart-Thomas elements on reference square
1 answers
11 votes
1k views
3 bookmarks
Smallest eigenvalue without inverse
3 answers
10 votes
3k views
4 bookmarks
How to construct a prolongation and restriction operator for an algebraic multigrid solver?
1 answers
9 votes
343 views
1 bookmarks
Iterative "solver" for $x^t \Sigma^{-1} x$
1 answers
8 votes
949 views
1 bookmarks
MPI policy for multiple asynchronous transfers
1 answers
7 votes
1k views
1 bookmarks
How does a Sparse Direct Solver know about dimensionality of a problem being solved?
1 answers
5 votes
272 views
1 bookmarks
Is PETSc's DMDA relying on undefined behavior?
1 answers
4 votes
582 views
1 bookmarks
$L^2$-error in FEM: how to compute integral over reference element?
1 answers
3 votes
765 views
2 bookmarks
Numerical integration with singularities