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