bigfloats of special functions (e.g. Bessel).. wasRe: integrate bessel_j errcatch?
Subject: bigfloats of special functions (e.g. Bessel).. wasRe: integrate bessel_j errcatch?
From: Raymond Toy
Date: Fri, 9 Dec 2011 09:42:30 -0800
On Fri, Dec 9, 2011 at 8:01 AM, Richard Fateman
<fateman at eecs.berkeley.edu>wrote:
> On 12/8/2011 4:28 PM, Raymond Toy wrote:
>
>
>
> On Thu, Dec 8, 2011 at 2:21 PM, Richard Fateman <fateman at eecs.berkeley.edu
> > wrote:
>
>> More googling re arbitrary precision.... here's an arbitrary precision
>> Bessel_j...
>>
>>
>> See
>>
>> http://mpmath.googlecode.com/svn/trunk/doc/build/functions/bessel.html?highlight=bessel#besselj
>>
>> and more generally, the mpmath library (in Python), which seems to be
>> trying to do the right thing.
>> Maybe we could just convert Python to Lisp. Or just run Python?
>>
>
> http://common-lisp.net/project/clpython/
>
> Never used it.
>
> Ray
>
> I just tried it in Allegro Express 8.2 (= free). The web page suggests
> it runs in (some) other lisps, too.
>
> It seems to work, running a test suite. Some parts apparently (known) not
> implemented include subclasses of numbers. Don't know if this matters for
> mpmath code.
>
> The loading process for clpython takes some time (a few seconds). I don't
> know if one can compile python into lisp and leave the clpython out of the
> image.
>
I've never even tried cl-python before.
> Still no eager student-project persons out there??
>
It's pretty close to the end of the semester and Christmas break.
Probably have better luck after the new year. (Ha!)
Ray