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MathGroup Archive 2001

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Re: Finding the intersect of two curves

  • To: mathgroup at smc.vnet.net
  • Subject: [mg30217] Re: Finding the intersect of two curves
  • From: "Allan Hayes" <hay at haystack.demon.co.uk>
  • Date: Thu, 2 Aug 2001 03:16:11 -0400 (EDT)
  • References: <9k88o0$53d$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Catherine,


Solve[{x^2 + y^2 == 4, x + y == 2}, {x, y}]

{{x -> 0, y -> 2}, {x -> 2, y -> 0}}

--
Allan
---------------------
Allan Hayes
Mathematica Training and Consulting
Leicester UK
www.haystack.demon.co.uk
hay at haystack.demon.co.uk
Voice: +44 (0)116 271 4198
Fax: +44 (0)870 164 0565

"Catherine Neish" <cdneish at interchange.ubc.ca> wrote in message
news:9k88o0$53d$1 at smc.vnet.net...
> 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
>
>
>




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