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Re: root of complex function

• To: mathgroup at smc.vnet.net
• Subject: [mg88462] Re: root of complex function
• From: "David Park" <djmpark at comcast.net>
• Date: Tue, 6 May 2008 06:37:58 -0400 (EDT)
• References: <fvmmtc$8gg$1@smc.vnet.net>

What is your complex function? I'm amazed at how often posters ask questions 
but don't give the example. Have you explored the function graphically?

You should be able to download RootSearch from MathSource.

http://library.wolfram.com/infocenter/MathSource/4482/

Just click the icons at the bottom far left.

However, RootSearch is only for single variable real functions. For this it 
seems to be much better than FindRoot and in my opinion should be part of 
Mathematica proper. But it won't help with complex functions. (Except there 
is a method where you can find find contours where the real part of the 
function is zero and then use RootSearch to search along these lines for 
points where the imaginary part is zero.)

-- 
David Park
djmpark at comcast.net
http://home.comcast.net/~djmpark/


"KFUPM" <hussain.alqahtani at gmail.com> wrote in message 
news:fvmmtc$8gg$1 at smc.vnet.net...
> Dear All
>
> I need to get a list of root intervals of a complex function. I tried
> in vain to use the package IntervalRoots. However, this package seems
> to work only with real functions. I appreciate it if someone can
> provide me with a simple code that does the job. I also tried to
> download the Rootsearch package by Ersek but the package is not
> downloadable.
>
>
> Regards,
>
> HMQ
>