Re: ODE problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg98598] Re: ODE problem*From*: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>*Date*: Mon, 13 Apr 2009 03:37:56 -0400 (EDT)*References*: <grpici$lkh$1@smc.vnet.net>

Hi, a) x*y'[x])'[x] is nonsense, you mean D[x*y'[x],x] b) x=0 is a singular point of the ode, you can't start in a singular point Regards Jens Janpou Nee wrote: > What went wrong in the foolwoing > s = NDSolve[{(x*y'[x])'[x] + Sin[y[x]]*y[x] == 0, y[0] == 1, > y'[0] == 0}, y[x], {x, 0, 30}]; > Plot[Evaluate[{y[x]} /. s], {x, 0, 30}, PlotStyle -> Automatic] >