[Maxima] quad_qags default epsrel value
raymond.toy at ericsson.com
Mon Oct 6 12:00:39 CDT 2008
Edwin Woollett wrote:
> On Oct. 3, Raymond Toy wrote:
>> Edwin Woollett wrote:
>>> the present Maxima help manual has quad_qags default
>>> value for epsrel as 1d-10.
>>> The actual default appears to be 1d-8 based on
>>> the following.
>> The manual is wrong. The default is 1d-8, which can be determined by
>> looking at the source code.
>> Thanks for pointing it out.
> Thanks for reminding me of the greatest advantage (for the serious
> researcher) of
> Maxima (as compared with Mathematica and Maple): namely, if one's
> program is not behaving as expected, one can always look at the
> Maxima source code which is being used for that program, and see exactly
> is going on (transparency vs. black box).
Having source code is very nice. But this is no excuse for the
documentation to be different from the implementation. :-)
Therefore, I've updated the documentation to say epsrel is 1d-8
everywhere, and updated the implementation to be 1d-8 too. (There were
a couple of routines where epsrel was 1d-10.)
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