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Question: nonlinear differential equation with boundary conditions

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
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 Sastrawan

Freiburg Materials Research Center
Stefan-Meier-Str. 21
D-79104 Freiburg
Tel: ++49/761/203-4802
FAX: ++49/761/203-4801
EMAIL: sastra at

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