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Re: different eigenvectors

  • To: mathgroup at smc.vnet.net
  • Subject: [mg83898] Re: different eigenvectors
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Tue, 4 Dec 2007 04:18:29 -0500 (EST)
  • Organization: Uni Leipzig
  • References: <fj0rjv$per$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de

Hi,

if the vector v solves the equation
A.v== lambda v

will also q*v with any scalar >0 solve the
equation ?? and will this be true for q=1 as well
as q=-1 ??

and is the order od the eigenvectors not arbitrary ?
The most system sort the eigenvectors by the absolute value
of the eigenvalues but there may be multiple eigenvalues or
eigenvalues with opposite sign ... and than the order ist still
arbitrary.

Regards
   Jens

vicky Al Aisa wrote:
> hello
> 
> I am using Eigenvectors function to calculate eigenvectors in
> mathematica 5.2.
> while comparing the results with the eigenvectors (of same matrix)
> computed in another system, i found that both the results are bit different
> with some values having opposite sign and coloumns rearranged.
> 
> thank you
> viky al aisa
> 


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