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MathGroup Archive 2004

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Re: Solving an equation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg51377] Re: Solving an equation
  • From: Roger Bagula <tftn at earthlink.net>
  • Date: Fri, 15 Oct 2004 02:47:33 -0400 (EDT)
  • References: <cklle4$eqe$1@smc.vnet.net>
  • Reply-to: tftn at earthlink.net
  • Sender: owner-wri-mathgroup at wolfram.com

Try using FindRoot[]
It should work if you have a starting value near the root.
It gives a  zeta zero root by this method:
FindRoot[Zeta[z]==0,{z,{1/2+14*I,1/2+I*200*I}}]

Scott wrote:

>I have an equation, Gamma[a+I b] = some complex number.  I need to
>solve this equation for a and b.  I can write a+I b as z, but it can't
>be solved through NSolve.  What I have been doing is a double do loop
>for a and b and getting some number.  Then I compare this to the
>number I have.  Then I narrow down my possibilities for a and b, and
>go through the process again.  Does anyone know of a better way to do
>this problem?  Is there a way to have Mathematica compare each result
>of the do loop to a given value, and given certain conditions spit out
>an answer for a and b?
>
>Hope that makes sense.
>
>  
>

-- 
Respectfully, Roger L. Bagula
tftn at earthlink.net, 11759Waterhill Road, Lakeside,Ca 92040-2905,tel: 619-5610814 :
alternative email: rlbtftn at netscape.net
URL :  http://home.earthlink.net/~tftn



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