Re: [Q] symbolic SVD?

*To*: mathgroup at smc.vnet.net*Subject*: [mg26819] Re: [mg26809] [Q] symbolic SVD?*From*: Jean-Marie THOMAS <jmt at agat.net>*Date*: Thu, 25 Jan 2001 01:13:03 -0500 (EST)*References*: <200101240918.EAA03610@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

The HelpBrowser specifies, for SingularValues, that this function applies ONLY on numerical matrices. If you want to get singular values for a symbolic matrix, you will have to implement your own algorithm, e.g. compute the det of m-lamba identity and find the roots of the resulting polynomial. On Wednesday 24 January 2001 10:18, 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.

**References**:**[Q] symbolic SVD?***From:*research@proton.csl.uiuc.edu (James)