topic pzheevr or similar PMRRR in mkl lib in Intel® oneAPI Math Kernel Library

pzheevr or similar PMRRR in mkl lib

PsyAuto — Sun, 29 Jan 2012 19:52:00 GMT

Hello,

I would like to know if there is any version of MRRR in MKL for complex matrices.

I did a quick search in these forums but found nothing. Sorry if this came up before!

If there is none, what subroutine would you recommend for selective diagonalization

of large (50k x 50k) complex matrices?

All the best,

PsyAuto

pzheevr or similar PMRRR in mkl lib

Aleksandr_Z_Intel — Mon, 30 Jan 2012 03:02:16 GMT

Dear PsyAuto,

The name of subroutine is (z,c)heevr. But take into consuderation thatroutine?heevr uses rrronly when the full spectrum is requested on machines which conform to the IEEE-754 floating point standard.

Try to use stemr for partial spectrum.

pzheevr or similar PMRRR in mkl lib

PsyAuto — Mon, 30 Jan 2012 12:21:04 GMT

Hi,

thank you for the quick response. I am trying to find a rrr subroutine for ScaLAPACK, sorry

I did not make it clear in my OP.

All the best,

pzheevr or similar PMRRR in mkl lib

Aleksandr_Z_Intel — Tue, 31 Jan 2012 05:21:27 GMT

At present, IntelMKL does not contain p(z,c)heevr. You may use NETLIB ScaLAPACK 2.0.0 p(z,c)heevr, seehttp://netlib.org/scalapack/scalapack-2.0.0.html.