All Questions
Tagged with fortran sparse-matrix
5 questions
2
votes
2
answers
715
views
Solve $AX=B$ where $A$ is a skyline matrix
Solve a matrix equation of the type $AX=B$, where $A$ is an $n \times n$ symmetric matrix stored in the form of symmetric skyline matrix.
With the solution given by Bill and some more research on ...
2
votes
4
answers
803
views
Constructing sparsity pattern of the Jacobian of a FORTRAN subroutine
I need to calculate the Jacobian matrix of a subroutine F(U). Both F and U are of size N(=O($10^5$)). Using Tapenade, I differentiated the routine in tangent mode. I cannot calculate the full Jacobian ...
- 531
2
votes
0
answers
87
views
Fortran solver for the Sparse LSE problem
I was wondering if there is a Fortran library that contains a solver for the Sparse LSE(linear equality-constrained least squares) problem
$$
min_{x}\|Cx-d\|^2 \text{ subject to } Ax=b
$$
where $A$ ...
- 21
2
votes
1
answer
250
views
Solving sparse linear equations with an iterative, out-of-core algorithm
Is there an iterative sparse parallel linear equation solver with out-of-core capabilities?
I need to solve a very large system of equations. I have implemented direct sparse parallel solvers in-core ...
- 139
8
votes
1
answer
3k
views
How to get sparse complex matrices from my code to PETSc efficiently
What is the most efficient way to get a complex sparse matrix from my Fortran code to PETSc? I understand that this is problem dependent, so I tried to give as many relevant details as possible below.
...
- 2,930