Sparse Direct Solver

Open discussion for MAGMA library (Matrix Algebra on GPU and Multicore Architectures)
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dannnnn
Posts: 37
Joined: Tue Mar 03, 2015 3:41 pm

Sparse Direct Solver

Post by dannnnn » Fri Apr 03, 2015 4:33 pm

I would like to know which routine is for sparse LU direct solver? I would like to know whether the LU solve under Linear Systems in the documentation can be used for solving sparse matrices? Thank you!

hartwig anzt
Posts: 90
Joined: Tue Sep 02, 2014 5:44 pm

Re: Sparse Direct Solver

Post by hartwig anzt » Fri Apr 03, 2015 4:51 pm

The LU is an incomplete LU (ILU) this can be used as a preconditioner for iterative solvers.

dannnnn
Posts: 37
Joined: Tue Mar 03, 2015 3:41 pm

Re: Sparse Direct Solver

Post by dannnnn » Mon Apr 06, 2015 10:46 am

You mean function magma_dgesv() is ILU? Can I use it as direct solver for sparse matrix?

mgates3
Posts: 918
Joined: Fri Jan 06, 2012 2:13 pm

Re: Sparse Direct Solver

Post by mgates3 » Tue Apr 14, 2015 12:28 am

No, magma_dgesv is normal LU (direct method) for dense matrices.

For sparse methods, see the routines under Sparse-iter and in Modules > Sparse.
http://icl.cs.utk.edu/projectsfiles/mag ... rsesolvers
http://icl.cs.utk.edu/projectsfiles/mag ... _gesv.html

-mark

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