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Re: how can i draw somethinglike ...


Needs["Graphics`Graphics`"]

DisplayTogether[
   ParametricPlot3D[{{x, y, Sqrt[x^2 - 1]}, 
     {x, y, -Sqrt[x^2 - 1]}}, {x, 1, 5}, {y, -5, 5}], 
   ParametricPlot3D[{{x, y, Sqrt[x^2 - 1]}, 
     {x, y, -Sqrt[x^2 - 1]}}, {x, -5, -1}, {y, -5, 5}], 
   ImageSize -> 450]; 

David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/ 

From: yaroslav.mail at gmail.com [mailto:yaroslav.mail at gmail.com]
To: mathgroup at smc.vnet.net

hi all !

i want to draw the quadratic surface of the folowing equation

x^2 - z^2 = 1

in Mathematica


thanks



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