Mathematica Question

*To*: mathgroup at yoda.physics.unc.edu*Subject*: Mathematica Question*From*: SCHNEIDR at KNOX.BITNET*Date*: Wed, 23 Jun 1993 15:26 CST

Mark Cooper asks if there is a way to plot an equation of the form x^2 + y^2 + z^2 + xy + xz + yz == 1. KnoxPackages contains the commands PlotConicSection and PlotQuadricSurface that between them will plot any quadratic equation in two or three variables. KnoxPackages are available through MathSource (request 0204-512). KnoxPackages contain many commands useful for teaching precalculus, calculus, multivariable calculus, and linear algebra. Dennis M. Schneider Knox College Galesburg, IL 61401 Schneidr at Knox.Bitnet