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MathGroup Archive 2001

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Re: [Q] symbolic SVD?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg26867] Re: [Q] symbolic SVD?
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Fri, 26 Jan 2001 01:27:17 -0500 (EST)
  • Organization: Universitaet Leipzig
  • References: <94m9jq$3o7@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

a symbolic SDV ist nonsens. How to decide what matrix
elements are small ist they have no value ??

Regards
  Jens

James wrote:
> 
> Sorry about reposting.
> I've not received any reply yet,
> and I tried several ways, but I couldn't get a clue, either.
> So if anyone can help, that would be appreciated.
> 
> -------------------------------------------------------------
> 
> I've used 'symbolic' calculation in mathematica in many ways,
> but this time,
> I wonder if mathematica can solve symbolic matrix operation.
> Specifically,
> 
>    m = {{a, b},
>         {c, d},
>         {e, f}}
> 
>    SingluarValues[m]
> 
> returns
> 
>   SingularValues::"svdf": "SingularValues has received a matrix
>           with infinite precision."
> 
> (a,b,c,d,e,f are all symbolics.)
> I need to do several symbolic matrix operations such as SingularValues.
> Is there any way to do that?
> Thank you.


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