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Re: NDSolve: Functions in PDEs have different number of variables

• To: mathgroup at smc.vnet.net
• Subject: [mg99662] Re: NDSolve: Functions in PDEs have different number of variables
• From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
• Date: Sun, 10 May 2009 05:18:40 -0400 (EDT)
• References: <gu3asb$t87$1@smc.vnet.net>

Hi,

as already told you, a G[t] is also
G[x,t] and G[x,y,t] and G[x,y,z,t] ...

Regards
   Jens

Blue Fly wrote:
> Dear Mathgroup:
> 
> I recently asked a question about solving a set of PDEs. My question could
> be abstracted as the follows:
> 
> Two functions, F[x, t] and G[t], satisfy a set of PDEs of two equations:
> 
> Equation one involves D[F[x, t], x], D[F[x, t], t], and G[t];
> while Equation two involves F[0, t] and D[G[t], t].
> 
> 
> When solving the set of PDEs, NDSolve complains that F[x, t] and G[t] have
> different number of variables, even though the problem is physically
> well-defined.
> 
> I would appreciate if someone could provide a hint on this questions.
> 
> Thanks.
> 
> Dave
> 
>