Help: How to solve PDE in Mathematica?

*To*: mathgroup at smc.vnet.net*Subject*: [mg31073] Help: How to solve PDE in Mathematica?*From*: li zheng <zhngli at yahoo.com>*Date*: Sat, 6 Oct 2001 03:33:21 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Dear group, Could you tell me who to get the general analytical solution of the following function 1. Uxy - Uy = 0 2. U + 2 Ux + 2 Uy +4 Uxy = 0 U is function of x and y. Something strange is: although I can calculate the general solution by hand for the first equation easily, I can't use mathematica to get the solution. I have tried two ways: ~ the DSolve and ~ the following way <<Calculus`DSolveIntegrals` CompleteIntegral[Derivative[1, 1][u][x, y] - Derivative[0, 1][u][x, y] == 0, u[x, y], {x, y}] Thanks a lot! Li --------------------------------- Do You Yahoo!? NEW from Yahoo! GeoCities - quick and easy web site hosting, just $8.95/month. Yahoo! by Phone.