Question: nonlinear differential equation with boundary conditions

*To*: mathgroup at smc.vnet.net*Subject*: [mg26429] Question: nonlinear differential equation with boundary conditions*From*: Ronald Sastrawan <sastra at fmf.uni-freiburg.de>*Date*: Wed, 20 Dec 2000 00:21:49 -0500 (EST)*Organization*: Rechenzentrum der Universitaet Freiburg, Germany*Sender*: owner-wri-mathgroup at wolfram.com

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