Subject: Handling branch cuts for hypergeometric functions
From: C Y
Date: Wed, 23 Feb 2005 19:43:51 -0800 (PST)
--- Wolfgang Jenkner wrote:
> Raymond Toy writes:
>
> > Raymond> What to do?
> >
> > Nothing.
> >
> > While everyone seemed to agree we should do something and more
> > interactive queries was not really desired, no one volunteered to
> > actually make interactive queries less interactive, so I'm not
> > going to do anything about the branch cuts.
>
> Actually, upon reading the thread I have the impression that most
> people don't mind sensible interactive queries.
I sure don't. In my (admittedly limited) experience they are actually
very useful.
> Personally, I find that interactive querying (and also Albert
> Reiner's idea of providing `typical values' for such queries) is a
> good thing, because doing so is both mathematically correct and in
> accordance with heuristical practice.
>
> IMHO, helping Maxima to pick the correct branch (or any other case
> where mathematical correctness is at stake) is so important that it
> should be done within the current design, which can be adjusted at
> some later point.
Agreed. Definitely.
CY
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