problem with ggevx eigenvalues

[Brian_Murphy]

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?

[Konstantin_A_Intel]

Hi Brian,

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

Regards,

Konstantin

[Brian_Murphy]

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?

[Konstantin_A_Intel]

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