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Topic: WorkingPrecision and NDSolve
Replies: 1   Last Post: Oct 22, 2009 10:41 PM

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Dan Dubin

Posts: 13
Registered: 3/26/09
Re: WorkingPrecision and NDSolve
Posted: Oct 22, 2009 10:41 PM
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>Why does this instruction properly work if precision =60 but not if
>precision=70 (Message : error test failure at t=0.01316... ) :
>NDSolve[{x''[t] + x'[t] + Sin[x[t]] == Sin[t/3], x[0] == 0, x'[0] == 0},
>x, {t, 0, 10}, WorkingPrecision -> 70] ?
>Thanks in advance,
>A. Hautot

Andre, I have been wondering the same thing, which I too observed
when solving other ODEs. Evidently if WorkingPrecision is set too
high in NDSolve, the method fails. Do the good people at WRI have any
comments on this issue? It looks like a bug to me.

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