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Re: NDSolve Question

David Park wrote:
> I found the answer, which is to use:
> f[q_?NumberQ]:= ...
> which prevents an initial evaluation.

This should be

f[q_?NumericQ] := ...

because Pi or Sqrt[3] are not atomic numbers, but they are numerical 
quantities.  Of course if f[q] is *only* used with NDSolve, then it 
doesn't matter ...

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