Adding a diagonal matrix to the sytrf (Bunch-Kaufman factorization) function output

Intel® oneAPI Math Kernel Library

Ask questions and share information with other developers who use Intel® Math Kernel Library.

Adding a diagonal matrix to the sytrf (Bunch-Kaufman factorization) function output

263 Views

I need to apply ?sytrf to a Matrix (A) then add a diagonal Matrix (λ I) to the output of the sytrf and after that use ?sytrs to solve a system of linear equations. However I can’t understand how output sytrf is written and what is the right way to add the diagonal matrix to get the Bunch-Kaufman factorization of the sum sytrf ( A + λ I) of the matrices. Adding the diagonal matrix before the using the function sytrf is not possible in the algorithm that we are using.

sytrf ( A + λ I) = sytrf ( A ) + C

Can't find the right way to add C to the sytrf ( A ).

I would be very grateful if someone can help me with this.

Thank you again,

David

Link Copied

0 Replies

Community support is provided during standard business hours (Monday to Friday 7AM - 5PM PST). Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.