Re: NDSolve - Nice function but stiffness-problem
- To: mathgroup at smc.vnet.net
- Subject: [mg94137] Re: NDSolve - Nice function but stiffness-problem
- From: Alois Steindl <Alois.Steindl at tuwien.ac.at>
- Date: Fri, 5 Dec 2008 05:35:06 -0500 (EST)
- Organization: Inst. f. Mechanics II, TU Vienna
- References: <gh8hih$qv5$1@smc.vnet.net>
Hello, I would guess, that Mathematica uses some kind of shooting algorithm to solve the BVP. Since the solutions of your ODE can become infinite at finite time, because the right hand side increases rapidly with f(x), the shooting algorithm isn't adequate for these problems. Collocation methods (like bvp4c in another system) work fine with these examples. Good luck Alois