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NDSolve vs. DSolve

• To: mathgroup@smc.vnet.net
• Subject: [mg10867] NDSolve vs. DSolve
• From: Students <students@micsrv1.mic.dtu.dk>
• Date: Wed, 11 Feb 1998 18:32:36 -0500
• Organization: News Server at UNI-C, Danish Computing Centre for Research and Education.

In the following examples the DSolve solves easily while the NDSolve is
producing the listed error messages. Why is that and how is it
bypassed.

DSolve[y'''[x]==-Cos[x],y[0]==0,y[5]==0,y'[0]==0,y[x],x]

NDSolve[y'''[x]==-Cos[x],y[0]==0,y[5]==0,y'[0]==0,y[x],{x,0,5}]

NDSolve::unsol:
    Not possible to initiate boundary value problem with the chasing
method

Please reply to c958038@student.dtu.dk or torhans@image.dk Thanks a lot