Re: Boundary conditions in NDSolve

*To*: mathgroup at smc.vnet.net*Subject*: [mg56860] Re: Boundary conditions in NDSolve*From*: YZ <z at ***.ohio-state.edu>*Date*: Sat, 7 May 2005 15:35:24 -0400 (EDT)*References*: <d5ctii$mbp$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

YZ wrote: > Hello, > > > when I NDSolve a 2nd order DE, I cant seem to give two boundary > conditions at different point of an interval I am solving it on: > > NDSolve[{f''[x]==K^2*Sin[f[x]],f'[-L]==A, f[-L]==B},f,{x,-L,L}] > produces good result, but i.e. > > NDSolve[{f''[x]==K^2*Sin[f[x]],f'[-L]==A, f[L]==B},f,{x,-L,L}] > ____here derivative is given at left edge, but the functi0n itself is > given at the right edge___ > > produces error: > > NDSolve::"bvlin" > "The differential equation(s) and/or boundary conditions are not linear > in the dependent variables. NDSolve requires linearity to compute the > solution of a multipoint boundary value problem. " > > Is there a way around this? > > > Thanks > > YZ > THanks Chris and Ramesh, after I posted this, I did some more research and pretty much figured out myself what you described. I should've done it before :-) YZ