Why is tlimswitch false by default?



It depends on whether you think the domain of applicability of the taylor
series method is sufficient for your limit calculations, or if the heuristic
methods in the non-tlimit program are needed.  It also depends on which
suite of programs is more robust over the common area of interest.  And it
depends on history.
RJF
 

> -----Original Message-----
> From: maxima-bounces at math.utexas.edu 
> [mailto:maxima-bounces at math.utexas.edu] On Behalf Of Nikos Apostolakis
> Sent: Sunday, September 02, 2007 11:17 AM
> To: maxima at math.utexas.edu
> Subject: Re: [Maxima] Why is tlimswitch false by default?
> 
> "Robert Dodier" <robert.dodier at gmail.com> writes:
> 
> > It's OK by me to make tlimswitch = true by default.
> > I would be interested to know if that makes some of the
> > known bugs in limit go away (without introducing new ones,
> > I hope).
> > 
> 
> I don't know about new ones, but it does take care of the bug I
> reported earlier (Request ID: 1786431)
> 
> (%i1) tlimswitch : true;
> (%o1)                               true
> (%i2) limit( sqrt(x^2 + x +1) + x, x, minf);
>                                         1
> (%o2)                                - -
>                                         2
> 
> and a few others, for example, 1731127, 1692082 and 1665657.
> 
> Best,
> Nikos
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