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MathGroup Archive 2002

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Re: Q: Solving Numerical Matrix-Equation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg35612] Re: Q: Solving Numerical Matrix-Equation
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Tue, 23 Jul 2002 01:51:06 -0400 (EDT)
  • Organization: Universitaet Leipzig
  • References: <ahdf7b$i31$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

"NullSpace[m] gives a list of vectors that forms a basis for the null
space \
of the matrix m."

?

NullSpace[M /. x-> "something like ... or ... "]

???

Regards
  Jens

Christoph Handel wrote:
> 
>    howdy,
> 
> i have a Problem of the Form
> 
> M . v == 0
> 
> where M is a complex, numerical, 8x8 Matrix and v is an Vector with
> eight unkown elements.
> 
> M depends on one parameter x (real).
> 
> There is no exact solution vor this equation. I will plot
> 
> Abs[Det[M[x_]]]
> 
> and watch for a local minimum. This way i can say: "x must be something like
> ... or ... or". Now I need to get the vector v in this point x.
> 
> Any hints for a nice function to complete this task?
> 
> Greetings
>          Christoph


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