Send mail to: mgnet@cs.yale.edu for the digests or bakeoff
mgnet-requests@cs.yale.edu for comments or help
Current editor: Craig Douglas douglas-craig@cs.yale.edu
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Multigrid Bakeoff
The pupose of the bakeoff is to try to determine a collection of interesting
problems and shed light on how to solve them better. While multigrid methods
are emphasized, any algorithm that solves one of these problems is fair game.
The codes participating will probably not be able to solve all of the
problems. However, all problems shoud be solvable by more than one code.
Otherwise, the problem is too specialized, hard, or uniteresting after all.
Some of the codes are research codes and others are production quality ones.
A distinction will be made between these classes.
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Mail and the Software Repository
All mail should be sent through mgnet@cs.yale.edu. It will be sent out quite
quickly to the active bakeoff participants and digested for others.
There is an anonymous ftp repository for mgnet at casper.cs.yale.edu. Change
directory to mgnet and get the files README.mgnet and INDEX.mgnet to see what
is really there.
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Problems
Details will be forthcoming. Actually, problems will be forthcoming.
So far, the only 2 problems advertised are the Poisson equation on the unit
square and cube, Dirichlet boundary conditions, and solutions
u(x,y)=x*exp(xy)*sin(pi*x)*sin(pi*y)
and
u(x,y,z)=x*exp(xyz)*sin(pi*x)*sin(pi*y)*sin(pi*z).
Discretization of these by central differences, elements, and volumes on
uniform grids could get interesting. For uniform grids, the number of
unknowns should be large (say about 256 squared for the 2D problem and about
32 or 64 cubed for the 3D problem). For nonuniform grids or alternative
methods, an error reduction will be provided (soon, ... really).
Such trivial problems are not really wanted, but something almost everyone can
solve and are well known in the literature should be included just as a point
of reference.
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Timing of Codes
Timing routines will be supplied. Everyone should use the same one on a given
architecture so that we are comparing apples with apples instead of apples
with oranges.
I already have ones for a large number of machines. However, it would not
hurt to send me a copy of yours for your favorite machine. When in doubt,
send me a message (douglas-craig@cs.yale.edu).
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Bakeoff Software Participants
Software packages listed below are participating. The sponsor is also listed.
Packages with a * to the left of the package name are stored in the mgnet
anonymous ftp area on casper.cs.yale.edu.
* MADPACK Sponsor: Craig Douglas
(version 2) E-mail: douglas-craig@cs.yale.edu or
bells@watson.ibm.com
Status: Public domain, research code
Updated: April 27, 1991
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Bakeoff Human Participants (Active and Passive)
Anyone with a * to the left of their name is active. This will be added as
people demonstrate they are active. The distinction below by region is solely
to keep the mailing list I have at Yale easier to manage and not for any other
purpose.
North America
Dinshaw Balasa dbalsara@ncsa.uiuc.edu
Victor Bandy vbandy@copper.denver.colorado.edu
Maurice Benson mwbenson@thunder.lakeheadu.ca
* Craig Douglas bells@watson.ibm.com
* Paul Frederickson pof@riacs.edu
Charles Tong chtong@snll-arpagw.llnl.gov
Sue Haupt haupt@ncar.ucar.edu
Mike Heroux mamh@cray.com
Jan Mandel jmandel@copper.denver.colorado.edu
Oliver McBryan mcbryan@boulder.colorado.edu
Steve McCormick smccormi@copper.denver.colorado.edu
Steven McKay mckay@dt.uh.edu
Naomi Naik nanaik@vassar.bitnet
Steve Schaffer schaffer@nmt.edu
Ridgway Scott scott@uh.edu
Ray Tuminaro tuminaro@cs.sandia.gov
John Van Rosendale john@icase.edu
Shangyou Zhang szhang@math.udel.edu
Europe
John Carrol carrollj%vax2.nihed.ie@uunet.uu.net
Ute Gaertel gmap15@dbngmd21.bitnet
Mathias Meinke kumein@dacth11.bitnet
Klaus Stuben gmap02@dbngmd21.bitnet
Rune Teigland resrt@mi.uib.no
Chris Thompson thompson@bsc.no
Eric van der Maarel maarel@cwi.nl
Paul de Zeeuw pauldz@cwi.nl
Denis Willams williamsd@dcu.ie
Middle East
Achi Brandt mabrandt@weizmann.bitnet
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