[SciPy-dev] Fwd: [SciPy-user] Re: Problems with expm, expm2

My VDI Freemail wagner.nils at vdi.de
Thu Mar 7 15:58:05 CST 2002


------ Forwarded message -------
From: My VDI Freemail <wagner.nils at vdi.de>
Reply-To: scipy-user at scipy.orgTo: "Travis Oliphant"  <oliphant at ee.byu.edu>
Cc: scipy-user at scipy.net
Date: Thu, 07 Mar 2002 20:56:18 +0100

-------------------
> > Dear Travis,
> >
> > I have tried several standard test problems (see references) .
> > Unfortunately, I never get the correct result for expm and expm2.
> 
> This is most likely a problem with the linear algebra interface still.
> 
> Most likely the solve is not working (could you test that on your system)?
> 
> I have tested these routines and am pretty sure that they work..
> 
> I used the routines from Matrix Computations.
> 
> 
> -Travis
> 
> 

Hi Travis,

I have used a symmetric test matrix. It works fine.
Therefore it seems to be a problem of non-symmetric matrices.

What do you think ?

Nils
 
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