Send mail to: mgnet@cs.yale.edu for the digests mgnet-requests@cs.yale.edu for comments or help Anonymous ftp repository: casper.cs.yale.edu (128.36.12.1) Today's editor: Craig Douglas (douglas-craig@cs.yale.edu) Volume 2, Number 5 (May 12, 1992) Today's topics: Compressed versus Uncompressed Files Call for Papers A One-Day Tutorial on "Multigrid Methods and Applications" New MG book Paper on adaptive multilevel iterative methods. Multigrid Short Course announcement E-Mail Address of Wolfgang Hackbusch ------------------------------------------------------- Date: Sun, 12 May 92 09:15:34 EST From: douglas-craig@cs.yale.edu Subject: Compressed versus Uncompressed Files I have received several complaints from people who do not have access to the programs uncompress or zcat on their systems. Since I have been compressing files as they come in (unless they already are compressed), I would like to hear from people who cannot unpack these files. If enough people cannot deal with the files, I will have to uncompress the files (or put both versions out). ------------------------------------------------------- Date: Sun, 10 May 92 09:16:00 EST From: douglas-craig@cs.yale.edu Subject: Call for Papers This is a reminder that when you complete a multigrid paper, you can download a copy to the repository faster than you can submit it for publication. There ought to be a number of such papers just completed or about to be completed since the papers for the Second Copper Mountain Iterative Meeting last month are due at SIAM on May 15th. For example, on a UNIX machine, % ftp casper.cs.yale.edu => Initiate connection User: anonymous => You type anonymous Password: a => You type a (or your login name) ftp> cd incoming => Change to the incoming directory ftp> mkdir your_name => Make a directory for yourself ftp> cd your_name => Change to your directory ftp> hash => Print # symbols during transfers ftp> put paper.abs => Put an abstract file (ascii, please) ftp> binary => Binary transfer ftp> put paper.dvi => Put the paper in some format ftp> quit => All done I keep the following entry in my .netrc file in my home directory: machine casper.cs.yale.edu login anonymous password bells@watson.ibm.com Then when I issue the ftp command, I can skip the user and password part of the above. ------------------------------------------------------- Date: Tue, 07 Apr 92 15:56:12 EST From: TJF Subject: Announcement A One-Day Tutorial on "Multigrid Methods and Applications" Sunday, July 19, 1992, Century Plaza Hotel, Los Angeles, CA This tutorial is designed for mathematicians, engineers, physicists, and other theoreticians and practitioners involved in large-scale computation who want to obtain a better understanding of multigrid techniques. Lecturers: Achi Brandt, Weizmann Institute of Science, Rehovot, Israel William L. Briggs, University of Colorado, Denver Stephen F. McCormick, University of Colorado, Denver Registration fees* SIAM Non- Member Member Student Advance (on or before 7/8/92) $120 $140 55 On-Site (after 7/8/92) 140 160 75 Preprints, coffee and lunch are included. To register, please contact SIAM, 3600 University City Science Center, Philadelphia, PA 19104. Telephone: 215-382-9800; FAX: 215-386-7999; E-Mail: meetings@siam.org ------------------------------------------------------- Date: Thu, 16 Apr 92 02:33:06 +0300 From: macost@weizmann.weizmann.ac.il Subject: New MG book Constantin Popa would like to announce the publication of the book: Gheorghe Juncu and Constantin Popa; Introduction to Multigrid Methods; 1991, (in romanian) Editura Technica, Piatza Presei Libere 1, 33 Bucharest, Romania 79738 Table of contents: 1. Geometric Multigrid, the Linear Case 2. Multigrid Convergence Theory, the Linear Case 3. Geometric Multigrid, the Nonlinear Case 4. Algebraic Multigrid 5. Convergence Theory for Algebraic Multigrid 6. Auxiliary Techniques 7. Applications 8. Computer Programs Constantin Popa, Department of Mathematics, University of Constantza, Bd. Mamaia, No 124, Constantza 8700, Romania ------------------------------------------------------- Date: Thu, 16 Apr 92 22:52:13 MDT From: jmandel@elbert.Denver.Colorado.EDU (Jan Mandel) Subject: bdd is in! I have just finished a code implementing "Balancing Domain Decomposition" that I would like to inflict on the innocent public. It now works for sure on SUN's and IBM RS6000's... Editor's Note: This is in the file jmandel/bdd.tar.Z now. ------------- ------------------------------------------------------- Date: Tue, 28 Apr 92 14:53:09 METDST From: Piet Wesseling (NW) Subject: tutorial multigrid software I would like to put the file mglab.tar.Z in the multigrid network repository. It contains the following read.me file, which should tell you enough. MGLAB.FOR is a tutorial multigrid program. It solves elliptic boundary values in one dimension. The user may choose various multigrid cycles, transfer operators, smoothing methods, and nested iteration end defect correction. Cell-centered and vertex-centered discretization and multigrid is included. Documentation is included in the program. The program is written in portable FORTRAN-77, and has run on MS-DOS PC's and Unix mainframes. The methods used are fully described in the following book: An Introduction to Multigrid Methods, Wiley, Chichester, 1992 by P. Wesseling. MGLAB.FOR is the FORTRAN source of the tutorial multigrid program. MGLAB.DAT is an example of an input file. MGLAB.RES is the corresponding output. Editor's Note: This is in the file wesseling/mglab.tar.Z now. ------------- ------------------------------------------------------- From: Ulrich Ruede To: mgnet@CS.YALE.EDU Subject: Paper on adaptive multilevel iterative methods. I've downloaded my paper On The Multilevel Adaptive Iterative Method to the mgnet repository. There is a file mlai.abstract containing the abstract, and a file mlai.dvi.Z containing the paper in compressed dvi format. This is the same paper that has appeared in the preliminary proceedings of the 2nd Copper Mt. Conference on Iterative Methods. @inproceedings{Ruede92, author = {U. R\"ude}, title = "On the Multilevel Adaptive Iterative Method", booktitle = "Preliminary proceedings of the 2nd Copper Mountain Conference on Iterative Methods", editor = "T. Manteuffel", publisher = "University of Colorado at Denver", year = "1992" } ABSTRACT The core of the multilevel adaptive iterative method consists of a relaxation scheme and an active set strategy. The active set is used to monitor where the iteration efficiently reduces the error. It is incrementally updated exploiting the current solution and the matrix structure. Arithmetic operations are restricted to the active set. The concept can be extended to a multilevel structure by additionally tracing the dependencies between unknowns on different levels. It improves the robustness and efficiency of classical multilevel methods; in particular it is an almost ideal supplement of adaptive refinement techniques. Keywords: Sparse matrices, iterative methods, multilevel methods, adaptivity. AMS(MOS) subject classifications: 65F10, 65F50, 65N22, 65N50, 65N55. Editor's Note: These are in papers/Ruede now. ------------- ------------------------------------------------------- Date: Sun, 10 May 92 10:08:14 -0600 From: cliu@copper.Denver.Colorado.EDU (cliu thesis) Subject: Multigrid Short Course announcement ANNOUNCEMENT The University of Colorado at Denver is sponsoring the Third Multigrid Short Course on campus from March 31 to April 4, 1993. The basic components of the course include . fundamental principles and algorithms . practical applications . software demonstration and distribution Suggestions about contents, arrangements, and other aspects of the course are encouraged. For example, people interested in having other topics included, or those interested in only attending part of the course (possibly for a reduced price), please indicate so. Such suggestions and comments should be sent to Chaoqun Liu either by e-mail at cliu@copper.colorado.edu or by regular mail at Chaoqun Liu Computational Mathematics Group Campus Box 170 University of Colorado at Denver P.O. Box 173364 Denver, CO 80217-3364 Following is the tentative program: MULTIGRID SHORT COURSE March 31 - April 4, 1993 Chairman : Chaoqun Liu Lecturers : Achi Brandt Williams Briggs Chaoqun Liu Steve McCormick John Ruge Monday - Tuesday 1. Elementary Multigrid Tutorial Basic Approach Elliptic Equations Adaptive Methods Wednesday - Thursday 2. Computational Fluid Dynamics Incompressible Navier-Stokes Equations Compressible Flows Grid Generation Two-Phase Porous Media Flows Flow Transition Combustion Friday 3. Multiscale Methods in Particle Simulation Monday-Friday 4. Software Demonstration and Distribution The registration fee will be $475 ($175 for students), which will include refreshments, computer laboratory access, and materials. Also, a block of reduced-rate rooms will be arranged in the neighboring Executive Tower Inn. Please Contact Chaoqun liu as indicated above for further information when it becomes available. ------------------------------------------------------- Date: 31 Apr 92 25:02:63 NST From: An@Ony.mous Subject: E-Mail Address of Wolfgang Hackbusch Does anyone know an electronic mail address that can deliver messages to Hackbusch? ------------------------------ End of MGNet Digest **************************