Plotting iso-distance curves from matrices

*To*: mathgroup at smc.vnet.net*Subject*: [mg70958] Plotting iso-distance curves from matrices*From*: Uwe Ziegenhagen <newsgroup at ziegenhagen.info>*Date*: Fri, 3 Nov 2006 01:39:01 -0500 (EST)*Organization*: Humboldt Universitaet zu Berlin

Hi, I would like to plot iso-distance curves (in 2 dimensions) satisfying the following condition: { x \in R^2 | (x-x_0)^T A (x-x_0) = d^2} with x a 2x1 vector, ^T denoting the transposed sign and A a positive definite matrix. Any way to do it in Mathematica? Uwe

**Follow-Ups**:**Re: Plotting iso-distance curves from matrices***From:*Carl Woll <carlw@wolfram.com>