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MathGroup Archive 2005

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Re: how to solve integral equation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg55488] Re: [mg55478] how to solve integral equation
  • From: "Janos D. Pinter" <jdpinter at hfx.eastlink.ca>
  • Date: Sat, 26 Mar 2005 02:39:19 -0500 (EST)
  • References: <200503251048.FAA11339@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Matt,

you can use e.g. NMinimize.

Example:
NMinimize[{0, N[fcn[10., b1, 5.]] == 1}, {b1}]
returns
{0., {b1 -> -0.052110648972416615}}

Regards,
Janos D. Pinter
PCS Inc.
E-mail: jdpinter at hfx.eastlink.ca
Web: www.pinterconsulting.com



At 06:48 AM 3/25/2005, you wrote:

>I have a function
>
>fcn[x_,b1_,b2_]:= Integrate[Exp[-(b1 x1^3 + b2 x1)],{x1,0,x}]
>
>For a given large x, and a given b2, I need to solve
>
>fcn[xlarge,b1,b2given]==1
>
>for b1.
>
>Any help would be greatly appreciated.
>
>Matt
>
>
>
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