Help in solving PDF equations

*To*: mathgroup at smc.vnet.net*Subject*: [mg52240] Help in solving PDF equations*From*: Wei Wang <weiwang at baosteel.com>*Date*: Wed, 17 Nov 2004 02:20:08 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

Sorry for making mistake in typing in last mail. Here comes the right one: Could anybody please help me in solving the following PDF equation? (p + E * (1 + (Derivative[1, 0][f][x, t])^2)^(1.5)/Derivative[2, 0][f][x, t]) )*(1- (Derivative[1, 0][f][x, t])^2)/Sqrt[1 + (Derivative[1, 0][f][x, t])^2] - k * Derivative[0, 1][f][x, t]==0 with initial or boundary conditions being f[x, 0] == -r Derivative[0, 1][f][x, 0] == p/k Derivative[1, 0][f][R0, t] == 0 f[x, t] == If[0<= x <=r, Sqrt[r^2 - x^2]] where, E, p, k, R0 and r are constants. Thanks in advance. Wei