topic problem with ggevx eigenvalues in Intel® oneAPI Math Kernel Library

problem with ggevx eigenvalues

Brian_Murphy — Thu, 01 Mar 2018 05:11:32 GMT

I am using ggevx with asymmetric real matrices, and complex roots which should be exactly conjugate are only approximately conjugate. Is there a way to get ggesv to return roots which are exactly conjugate?

Hi Brian,

Konstantin_A_Intel — Tue, 06 Mar 2018 23:37:30 GMT

Hi Brian,

Do you observe the same behavior for other generalized eigensolvers, e.g. ?ggev or ?ggev3 ?

Regards,

Konstantin

Thanks for the reply. I have

Brian_Murphy — Wed, 07 Mar 2018 17:47:29 GMT

Thanks for the reply. I have not tried ggev. The documentation describes it as the same as ggevx without extra options for balancing and so forth. ggev3 is not in the MKL that I currently have installed. How is it different?

Hi Brian,

Konstantin_A_Intel — Thu, 15 Mar 2018 19:33:27 GMT

Hi Brian,

I'm sorry for the late reply. Indeed, the difference between all the mentioned solvers isn't so significant.

So, in order we to take a look at your issue, can you please provide us with a reproducer and specify which MKL version you have.

Regards,

Konstantin