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PDE Systems.

• To: mathgroup at smc.vnet.net
• Subject: [mg2661] PDE Systems.
• From: Dave Snead <76300.3545 at compuserve.com>
• Date: Sun, 3 Dec 1995 02:54:03 -0500

Anyone know of a package to solve systems of partial differential 
equations in Mathematica (even linear ones)?

I tried the following in mma2.23:

DSolve[{D[f[x,y],x]==0,D[g[x,y],y]==0,D[f[x,y],y]+D[g[x,y],x]==0},
  {f[x,y],g[x,y]},{x,y}]

And got the message:

DSolve::pde: Partial differential equation encountered.