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CULA • View topic - Solvers not working

Solvers not working

General CULA Dense (LAPACK & BLAS) support and troubleshooting. Use this forum if you are having a general problem or have encountered a bug.

Solvers not working

Postby deveight » Wed Jul 03, 2013 6:23 am

deveight
 
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Re: Solvers not working

Postby john » Wed Jul 03, 2013 10:02 am

These matrices have definitely been made dense, correct? And the symmetric portions have been populated? GESV assumes dense and fully filled, and the sparse MTX files are neither.

Keep in mind that GESV modifies the matrix and leaves the LU factorized matrix in its place, so if you call it twice with the same matrix it will not solve the second one properly. You need to use GETRS for subsequent solves against the same matrix.
john
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