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Re: Differential eqn. with interpolated coeficients

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  • Subject: [mg29230] Re: Differential eqn. with interpolated coeficients
  • From: Daniel Arteaga <darteaga at>
  • Date: Wed, 6 Jun 2001 04:24:19 -0400 (EDT)
  • References: <9f7j82$grq$>
  • Sender: owner-wri-mathgroup at

I have discovered what happens. Mathematica is able to solve the
differential equation with interpolated coeffitients only if you specify
initial conditions, (y[0]==a,y'[0]==b), but not if more general boundary
conditions are specified. However, I have reespecified my problem with
initial conditions, so that now everithing works fine.

Thank you for your help,

Daniel Arteaga

Daniel Arteaga wrote:
> I need to solve a ordinary second order differential equation, of the
> type y''[x] + P[x] y'[x] + Q[x] == 0, where the coefficients P[x] and
> Q[x] are an interpolating function (or a table of numerical data).
> I have tried with NDSolve, but it seems to admit only an interpolating
> function for Q[x], but not for P[x]. Does any one know what could I do?
> Regards,
> Daniel Arteaga

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