Re: [Maxima-discuss] e, pi, gamma, log(2)

[Raymond T. <toy...@gm...>]

On Sat, Sep 20, 2014 at 2:58 AM, Volker van Nek <vol...@gm...>
wrote:

> Am 19.09.2014 20:35, schrieb Raymond Toy:
> >>>>>> "Volker" == Volker van Nek <vol...@gm...> writes:
> >
> >     Volker> [ I also implemented exp(x), log(x), sin(x) and friends for
> bigfloat x.
> >     Volker> In contrast to fpe1, .. these implementions are still some
> kind of raw
> >     Volker> material and need more error analysis. And of course it's a
> lot more
> >     Volker> difficult to merge them into Maxima. My idea is to put them
> into
> >     Volker> /share/contrib for now. ]
> >
> > Is there something wrong with the current implementations of these
> > functions?
> >
> > Ray
> >
>
> Ray, as I wrote in my last sentence I do not feel any pressure to
> replace the current functions in src.
>
> After coding the binary splitting versions for the constants I was
> curious to check out the other algorithms described in this paper.
>
> I thought it is worth to share the implementation of these algorithms.
> Perhaps someone can use them or is simply interested to study them.
>
> The binary splitting variants are very fast and in some far future these
> implementations might be worth to consider. At the moment I don't want
> to risk breaking anything in src for the sake of speed advantages.
>

​Ok. I haven't looked at your code yet, but if they're significantly faster
and not (much) less accurate, we should consider adding these.  I'm sure we
can come up with a nice set of tests to cover the code to show that it's
good.​


>
> Volker
>
> >
> >
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-- 
Ray