Re: [ROOT] Equations

From: Rene Brun (Rene.Brun@cern.ch)
Date: Wed Jan 09 2002 - 17:57:50 MET

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Hi Alberto,

Two weeks ago, I received new functions in TMatrix and TMatrixD
from Eddy Offermann computing eigenvectors and eigenvalues

   void  MakeEigenVectors(TVector &d,TVector &e,TMatrix &z);
   void  EigenSort(TMatrix &eigenVectors,TVector &eigenValues);

They are in CVS.

Rene Brun

Alberto Pulvirenti wrote:
> 
> Hi folks!
> 
> Another problem I encountered during my work is solvin an eigenvalue
> problem for a 3x3 matrix. Is there a way to perform it via ROOT objects?
> 
> I asked because it requires solving a 3rd order equation...PLEASE, tell
> me that there IS a way to avoid to solve by my own!! ;-)
> 
> Alberto

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