Re: Question: nonlinear differential equation with boundary conditions

*To*: mathgroup at smc.vnet.net*Subject*: [mg26443] Re: Question: nonlinear differential equation with boundary conditions*From*: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>*Date*: Thu, 21 Dec 2000 01:51:45 -0500 (EST)*Organization*: Universitaet Leipzig*References*: <91pjgd$5vc@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hi, Mathematica can't solve nonlinear boundary value problems. The online documentation say: "Not all linear equations with boundary values can be solved by the method that is implemented. Nonlinear equations cannot be solved, either." Regards Jens Ronald Sastrawan wrote: > > Hello! > Sorry, in my last post there was a mistake in my equation. > (There should be a y^2 in the equation). The real question was: > > I encountered a problem, trying to numerically solve a differential > equation. > My equation looks like: > > A y''[x] - B (y[x])^2 + C Exp[-Dx] == 0 > with boundary conditions: y'[0]==0 , y'[E]==0 > > All constants A to E are known. > > Mathematica complains, that the equation is not linear. But in the > online documentation I saw many examples of nonlinear differential > equations, which all work fine. What is the difference between the > examples and my equation ? And is there a possibility to NDSolve my > equation ? > > Any hint on this would be of great help to me. > > Thanks a lot, > > Ronald > > -- > Ronald Sastrawan > > Freiburg Materials Research Center > Stefan-Meier-Str. 21 > D-79104 Freiburg > Germany > Tel: ++49/761/203-4802 > FAX: ++49/761/203-4801 > EMAIL: sastra at fmf.uni-freiburg.de > http://www.fmf.uni-freiburg.de/~biomed/FSZ/forschung-FSZ.html