Re: The Wave Equation : Mathematica vs. Mathworld
- To: mathgroup at smc.vnet.net
- Subject: [mg47931] Re: The Wave Equation : Mathematica vs. Mathworld
- From: gilmar.rodriguez at nwfwmd.state.fl.us (Gilmar Rodr?guez Pierluissi)
- Date: Fri, 30 Apr 2004 19:27:18 -0400 (EDT)
- References: <c6s4k2$ph7$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
I thank you all again for your wonderful comments. But the question remains: How can a Mathematica User go about introducing the Initial and Boundary conditions to solve the original problem presented in http://mathworld.wolfram.com/WaveEquation.html? If a person use the Mathematica Help Browser and type DSolve; a group of examples appear showing the format to follow when using DSolve. When I follows that format to solve the Wave PDE, with the IC and BC specified in MathWorld I get: DSolve[{D[ Psi[x, t], {x,2}] == c*D[ Psi[x, t], {t,2}] ,Psi[0,t]==0,Psi[L,t]==0,Psi[x,0]==f[x],D[Psi[x,0],t]==g[x]} ,Psi[x, t],{x, t}] When I evaluate this command, I get an error.