NDSolve error message: Can't find starting value ...
- To: mathgroup at smc.vnet.net
- Subject: [mg23755] NDSolve error message: Can't find starting value ...
- From: Axel Kowald <axel at itb.biologie.hu-berlin.de>
- Date: Mon, 5 Jun 2000 01:09:50 -0400 (EDT)
- Organization: Technische Universitaet Berlin, Deutschland
- Sender: owner-wri-mathgroup at wolfram.com
Hello, I try to solve the following second order ODE with NDSolve NDSolve[{0 == R''[x] + DiracDelta[x] - R[x], R''[-3] == 0, R''[3] == 0}, R, {x, -3, 3}] and I get the following error message: NDSolve::"ndsv": "Cannot find starting value for the variable x." I couldn't find any description of this message in the Mathematica book, so I'm not sure what to do. I have a second order ODE with two boundary conditions, what's missing ? Many thanks, Axel Kowald P.S. Btw., this is done with Mathematica 4.