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MathGroup Archive 1990

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Re: Speeding up Mathematica / numerical precision

  • To: mathgroup at yoda.ncsa.uiuc.edu
  • Subject: Re: Speeding up Mathematica / numerical precision
  • From: uunet!yoda.ncsa.uiuc.edu!paul%wri (Paul Abbott)
  • Date: Mon, 19 Mar 90 15:06:47 CST

Richard Fateman states:

> About using N[ ...,30] around everything... this may not work
> because in Mathematica, f[N[...,30]] and N[f[...],30]  are not the same.

This is correct and reveals a subtle point about the use of N in 
Mathematica.  Jerry Keiper's tutorial notes on this topic (available,
as mentioned previously, directly from Wolfram Research) help to 
clarify this matter further.

			Paul C. Abbott



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