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Topic: Work on Basic Mathematica Stephen!
Replies: 81   Last Post: Jun 4, 2013 5:59 AM

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 Dr. Peter Klamser Posts: 23 Registered: 6/11/11
Re: Work on Basic Mathematica Stephen!
Posted: May 17, 2013 4:34 AM

.... thank you for the response.

Every WRI employee writes this since years, but "fuzz" stays "fuzz"
and "fuzz" is not essential.

Peter

2013/5/16 Murray Eisenberg <murray@math.umass.edu>:
> If I understand this proposal aa), then I completely disagree. It is *essential* to have the ability to use a function Chop that, e.g., does the following:
>
> Chop[4. + 10.^-16 I]
> 4.
>
> The reason is that even when one starts with strictly real functions, it is often the case that Mathematica uses complex-function methods and, due to roundoff, returns results with some pure imaginary "fuzz".
>
> On May 16, 2013, at 3:28 AM, Peter Klamser <klamser@googlemail.com> wrote:
>

>> . .. A) First proposal: Identify useless or false constructions in Mathematica
>>
>> aa) Eliminating Chop[] for complex numbers. Complex numbers are
>> oderless and therefore nobody call estimate, weather the distance of 1
>> + 10^-google i to the real numbers is small or big. Chop[] is the
>> result of Mathematica design, that it presents often complex results, where
>> real values are the simpler result and can be reached by
>> ComplexExpand[].
>> The simplest solution is always the best solution.

>
> ---
> Murray Eisenberg murray@math.umass.edu
> Mathematics & Statistics Dept.
> Lederle Graduate Research Tower phone 413 549-1020 (H)
> University of Massachusetts 413 545-2838 (W)
> 710 North Pleasant Street fax 413 545-1801
> Amherst, MA 01003-9305
>
>
>
>
>

Date Subject Author
5/12/13 David Park
5/14/13 Nasser Abbasi
5/15/13 szhorvat@gmail.com
5/16/13 szhorvat@gmail.com
5/16/13 Dr. Peter Klamser
5/17/13 Andrzej Kozlowski
5/17/13 Murray Eisenberg
5/17/13 Dr. Peter Klamser
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