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Question concerning Beuwolf computing & Relativistic N-Body Problems

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  • Subject: [mg62536] Question concerning Beuwolf computing & Relativistic N-Body Problems
  • From: alan heider <mathphysabs at>
  • Date: Sun, 27 Nov 2005 02:40:29 -0500 (EST)
  • Sender: owner-wri-mathgroup at

Hello All -

I'm considering buying a significant number of Mac's
(preferably G5's) for Beuwolf computing.  I have lots
of questions as it seems that Virginia Tech is the
largest current group:

I.  During down time for the original computations
(some code has been written, some not), we'd like to
hook up with BOINC at Berkeley for sorting through
gravitational wave data.  Is there another project
more pressing (e.g. protein folding?)

II.  Code has been written for the calculation of all
relevant GR quantities (this is my own and is much
more efficient than any previously written, as I have
tested it on another machine).  Current computations
for the inspiral of two black holes are currently
utilizing a combination of finite element, finite
difference, and spectral methods.  Ours is capable of
a fully relativistic N-Body simulation.  The bottle
necks include:

After simplification using CAS, huge matrices are
generated.  Is it faster to send these out to a LinPak
application versus trying to either invert or iterate
them in Mathematica?

Any suggestions would be sincerely appreciated
(including current BenchMarks on Feyncalc for
perturbation theory...... we need about 20th order)

Thanks in advance,

Geoffrey Alan Cope

Yahoo! Mail - PC Magazine Editors' Choice 2005

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