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Re: Why Mathematica does not issue a warning when the calculations

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On 31 Mar 2011, at 17:45, Richard Fateman wrote:

> On 3/31/2011 4:05 AM, Andrzej Kozlowski wrote:
>> On 31 Mar 2011, at 11:03, Richard Fateman wrote:
>>
>>> Here's a way around this issue, I think.  For every function of
>>> interest, do something like this:
>>> prec;
>>> f[x_]:=Block[ {$MaxPrecision=prec,$MinPrecision=prec}, Whatever...]
>>>
>>> This is even less intuitive than your suggestion.
>>>
>>>
>>> RJF
>>
>>
>> An original and surprising suggestion, particularly in view of the following:
>>
>>
>> On 29 Mar 2011, at 13:53, Andrzej Kozlowski wrote:
>>
>>> In addition (for some curious reason) Richard never bothers to point out that
>>>
>>> z = 1.0000000000000000000;
>>> Block[{$MaxPrecision = 20, $MinPrecision = 20},
>>> Table[(z = 2*z - z), {42}]]
>>
>> Andrzej Kozlowski
>>
>
> Certainly Andrzej was not the first to post this on mathgroup, nor was I.
> My point, which Andrzej may have lost sight of, is that to make this setting effective, one must rephrase each and every function this way.

And what on earth made you think I "lost sight" of this obvious point?

Andrzej

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Re: Why Mathematica does not issue a warning when the calculations Andrzej Kozlowski <akoz@mimuw.edu.pl> - 2011-03-31 11:05 +0000
  Re: Why Mathematica does not issue a warning when the calculations Richard Fateman <fateman@cs.berkeley.edu> - 2011-04-01 07:30 +0000
  Re: Why Mathematica does not issue a warning when the calculations Andrzej Kozlowski <akoz@mimuw.edu.pl> - 2011-04-01 07:30 +0000

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