AW: Finding the intersect of two curves

*To*: mathgroup at smc.vnet.net*Subject*: [mg30201] AW: [mg30179] Finding the intersect of two curves*From*: Matthias.Bode at oppenheim.de*Date*: Thu, 2 Aug 2001 03:15:56 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Hello Catherine, I'm not sure if I understood perfectly well what you aspire, given that the class of curves whose function we don't know is probably the largest of them all. Mathematica allows you to plot the line(s) where a function hits particular values, i.e. where it intersects with a line or a plane. Have a look at ContourPlot and <<Graphics`ContourPlot3D`. Best regards, Matthias Bode Sal. Oppenheim jr. & Cie. KGaA Koenigsberger Strasse 29 D-60487 Frankfurt am Main GERMANY Tel.: +49(0)69 71 34 53 80 Mobile: +49(0)172 6 74 95 77 Fax: +49(0)69 71 34 63 80 E-mail: matthias.bode at oppenheim.de Internet: http://www.oppenheim.de -----Ursprungliche Nachricht----- Von: Catherine Neish [mailto:cdneish at interchange.ubc.ca] Gesendet: Mittwoch, 1. August 2001 08:20 An: mathgroup at smc.vnet.net Betreff: [mg30179] Finding the intersect of two curves Hello there. I was wondering if there is any way to find the intersection of two curves without knowing the equation of one of them. For example, I have the following curves: ImplicitPlot[function[x,y] == constant, {x, xmin, xmax}, {y, ymin, ymax}] function[x] == constant The curve generated by Implicit Plot does not have an explicit equation. Is it still possible to find the point where these two curves intersect? Any help would be greatly appreciated. Sincerely, Catherine Neish cdneish at physics.ubc.ca