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Re: Inverting a non-square matrix

• To: mathgroup at smc.vnet.net
• Subject: [mg20231] Re: Inverting a non-square matrix
• From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
• Date: Fri, 8 Oct 1999 18:30:12 -0400
• Organization: Universitaet Leipzig
• References: <7tgr12$se9@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Hi,

a non square matrix has no inverse ! So you can't calculate it
even with Mathematica.  If the SingularValues[] function of Mathematica
can help you depends on your problem.

Regards
  Jens

Nicolas Bardou wrote:
> 
> Hi all,
> 
> I learnt a bit of Mathematica when I was student and I need a formal
> calculation of the inverse of a non square matrix. But we do not have
> the software in my department.
> Can anyone say me if it is possible, and what are the formulas?
> My matrix is:
> A =
> [a b c d]
> [e f g h]
> [i j k l]
> and all the parameters are variable.
> 
> Thank you by advance!