From: johnscpg@googlemail.com
Subject: Re: ANN: miscellaneous Math routines, GPL'd
Date: Wed, 13 May 2009 02:39:50 -0700 (PDT)
Date: 2009-05-13T02:39:50-07:00 [thread overview]
Message-ID: <cb936fa3-df11-4563-b283-b0bfed0ba070@o27g2000vbd.googlegroups.com> (raw)
In-Reply-To: nospam-51F0B4.14453112052009@news.aioe.org
On May 12, 7:45 pm, "John B. Matthews" <nos...@nospam.invalid> wrote:
> In article
> <9dbcdcd0-3c15-4165-9336-3d5778df2...@e20g2000vbc.googlegroups.com>,
>
>
>
> johns...@googlemail.com wrote:
> > For those of you who like Ada with their numerics (is there
> > anyone who doesn't?!) I have released a collection of math
> > routines under the GPL license. Find them at:
>
> > http://web.am.qub.ac.uk/users/j.parker/miscellany
>
> > The full set is tarred in the file:
>
> > miscellany.10may09.tar.gz
>
> > in the directory given above.
>
> > Most are old classics I have found useful over the years
> > (SVD, QR, LU, Runge-Kutta, FFT, Arbitrary precision floating point).
> > The random number generators are very new; the documentation
> > should explain why I recommend them. The random number generators
> > and the Arbitrary precision floating point are designed to
> > make good use of the new 64-bit CPU's.
>
> Excellent. You might like to see my experimental implementation of
> Generic_Roots, using the Durand-Kerner-Weierstrass method and
> distributed under the GNAT modified GPL:
>
> <http://home.roadrunner.com/~jbmatthews/misc/groots.html>
>
> --
> John B. Matthews
> trashgod at gmail dot com
> <http://sites.google.com/site/drjohnbmatthews>
Thanks for the pointer. Root finding BTW is one of those problems
that cries out for extended precision floating pt. Its rarely
time-sensitive (rarely in inner loops), but very sensitive
to precision ... last time I did it, it was on mathematica
in extended precision .. I prefer Ada! If I did in Fortran I'ld
always use REAL*16 (Quad-precision, 32 digit floats) but only one
Fortran (intel ifort) supports this as far as I know (except IBM's
fortran
on powerpc). If I ever find the time I'll hook
up your root finder to my Extended Precision package.
cheers
jonathan
next prev parent reply other threads:[~2009-05-13 9:39 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-12 16:38 ANN: miscellaneous Math routines, GPL'd johnscpg
2009-05-12 18:45 ` John B. Matthews
2009-05-13 9:39 ` johnscpg [this message]
2009-05-13 13:40 ` John B. Matthews
2009-05-12 19:03 ` Dmitry A. Kazakov
2009-05-12 21:02 ` lanceboyle
2009-05-13 9:25 ` johnscpg
2009-05-13 11:52 ` gautier_niouzes
2009-05-13 13:43 ` johnscpg
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox