[Trilinos-Users] dd_real for Anasazi

Baker, Christopher G. bakercg at ornl.gov
Sun Nov 4 08:05:13 MST 2012

Unfortunately, iterative eigensolvers are dependant on dense solvers (LAPACK). Without LAPACK support for qd_real, none of the Anasazi eigensolvers can be applied.

However, there is an experimental, lapack-free eigensolvers in Tpetra, under examples/MultiPrec. It is a trust-region solver called IRTR. If you are interested in using it, feel free to contact me.


-----Original Message-----
From: Holger Brandsmeier [holger.brandsmeier at sam.math.ethz.ch<mailto:holger.brandsmeier at sam.math.ethz.ch>]
Sent: Saturday, November 03, 2012 07:59 PM Eastern Standard Time
To: trilinos-users at software.sandia.gov
Subject: [Trilinos-Users] dd_real for Anasazi

Dear list,

what is the status of support for data types such as dd_real and
qd_real in Anasazi?

On a first try I ended up with a compile error on

   eps_ = lapack.LAMCH('E');
which failes with
  static inline T notDefined() { return
T::LAPACK_routine_not_defined_for_this_type(); }

That by itself would be easy to fix, but I guess there will be more
errors coming? Note that I am also still using 10.10, I can switch to
11.0 if there is support for this.


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