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Re: The Wave Equation : Mathematica vs. Mathworld

• To: mathgroup at smc.vnet.net
• Subject: [mg47895] Re: [mg47873] The Wave Equation : Mathematica vs. Mathworld
• From: Cheng Liu <cliu at lanl.gov>
• Date: Thu, 29 Apr 2004 19:39:41 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

Because the equation you were trying to solve is not a wave equation!

At 01:05 AM 4/29/2004, Gilmar Rodr?guez Pierluissi wrote:
>*******************************************************************************
>I'm attempting to duplicate the analysis found in:
>
>http://mathworld.wolfram.com/WaveEquation.html
>
>about how to derive a solution to the Wave Equation.
>I want to get to that solution using Mathematica.
>The solution to the Wave Equation is given by Eq(39)
>displayed on the above website.
>To see my attempt to solve the Wave Equation using Mathematica v.5,
>please double-click the following internet link, and save
>this notebook into a directory of your choice:
>
>http://www.tilmarlily.netfirms.com/download/wave.nb
>
>The solution given by Out[2](in the notebook) is very different
>from Eq(39).
>
>My question is, why is the solution given by Mathematica so
>different than the classical result given by Eq(39)in the Mathworld
>website?
>
>Thank you!

===================================
Cheng Liu, Ph.D.
MST-8, MS-G755
Los Alamos National Laboratory
Los Alamos, NM 87545

email: cliu at lanl.gov
Phone: (505)665-6892 (office)
        (505)667-9950 (lab)
Fax:   (505)667-8021
===================================