NDSolve problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg15754] NDSolve problem*From*: kenton at leland.Stanford.EDU (Kenton K. Yee)*Date*: Sun, 7 Feb 1999 02:03:40 -0500 (EST)*Organization*: Graduate School Of Business, Stanford University*Sender*: owner-wri-mathgroup at wolfram.com

I am trying to solve the following equation: NDSolve[ {D[v[b,y],b,b] - (.1 b - .3) D[v[b,y],b] == .1 v[b,y] , v[2,y]==-2, Derivative[1,0][v][25,y] == 0,v[25,y]==0}, v, {b,2,25},{y,-2,2}] (Actually, my real problem is with the upper boundary of b -> Infinity, but I would be happy with the b=25 approximation.) In any case, when I type this into mathematica, I get the following error: "NDSolve::ivnone: No initial values specified." What is wrong?! I know the above differential equation has an analytical solution (I found it using the DSolve function!), but I am trying to learn how to use NDSolve to solve such equations. kenton at stanford.edu