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Re: Solving an equation

  • To: mathgroup at
  • Subject: [mg51364] Re: [mg51299] Solving an equation
  • From: "David Park" <djmp at>
  • Date: Fri, 15 Oct 2004 02:46:28 -0400 (EDT)
  • Sender: owner-wri-mathgroup at


Try FindRoot. As an example...

FindRoot[Gamma[z] == 2 + 3*I, {z, 1}]

{z -> -1.1423913504357908 + 0.2086374207214744*I}

David Park
djmp at 

From: Scott [mailto:jujio77 at]
To: mathgroup at

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.

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