Subject: NA Digest, V. 93, # 34 NA Digest Tuesday, September 14, 1993 Volume 93 : Issue 34 Today's Editor: Cleve Moler The MathWorks, Inc. moler@mathworks.com Today's Topics: Milton E. Rose Change of Address for Jim Pool Change of Address for Ilse Ipsen Change of Address for Marino Zennaro Change of Address for Bill Mitchell Well-posedness of "Almost Hyperbolic" Systems QMRPACK is Available from NETLIB Difficulties with IEEE Arithmetic, part 2 F90 Test codes Re: SIAM Meetings Electronic Journal of Differential Equations (EJDE) New Book, Numerical Linear Algebra New Book, Introduction to Linear Algebra Cornelius Lanczos International Centenary Conference Scalable High Performance Computing Conference IFIP Conference on Programming Environments Symposium in Honor of Walter Gautschi Positions at University of Srathclyde SIAM Catalogs Available Contents: International Journal of Supercomputer Applications Submissions for NA Digest: Mail to na.digest@na-net.ornl.gov. Information about NA-NET: Mail to na.help@na-net.ornl.gov. ------------------------------------------------------- From: Paul Saylor Date: Fri, 10 Sep 93 17:38:33 -0400 Subject: Milton E. Rose Milton E. Rose died Sunday, August 22 in Lakewood, Colorado at age 68. Milt retired as Director in 1985 from the Institute for Computer Applications in Science and Engineering (ICASE). He had held positions at the National Science Foundation and the Department of Energy before his appointment at ICASE in 1977. Milt was known for his work in partial differential equations, and recognized for his leadership in the mathematical sciences. ------------------------------ From: J.C.T. Pool Date: Wed, 8 Sep 1993 15:37:12 -0500 Subject: Change of Address for Jim Pool Change of Address for Jim Pool, effective October 1, 1993 James C. T. Pool, Deputy Director Caltech Concurrent Supercomputing Facility California Institute of Technology, MS 158-79 Pasadena, CA 91125 Telephone: 818-395-6953 Fax: 818-584-5917 Email: pool@ccsf.caltech.edu James C. T. Pool, Head Telephone: 215-895-2668 Mathematics & Computer Science Facsimile: 215-895-4999 Drexel University Internet: jpool@mcs.drexel.edu Philadelphia, PA 19104-2884 ------------------------------ From: Ilse Ipsen Date: Thu, 9 Sep 93 10:14:03 EDT Subject: Change of Address for Ilse Ipsen My new address is: Ilse Ipsen Department of Mathematics North Carolina State University Box 8205 Raleigh, NC 27695-8205, USA (919) 515-3796 ipsen@math.ncsu.edu ------------------------------ From: Marino Zennaro Date: Thu, 9 Sep 1993 21:42:54 +0200 (WET-DST) Subject: Change of Address for Marino Zennaro I inform all colleagues that very soon I am moving from the University of L'Aquila to the University of Trieste. Therefore the mailing address to be used to send me anything from now on is the following: Marino Zennaro Dipartimento di Scienze Matematiche Universita' di Trieste I-34100 Trieste, Italy Since the two Univesities are quite far from each other, any mail which might be sent to my previous address in L'Aquila is likely to take a very long time before I actually get it. Also my e-mail address in L'Aquila zennaro@vxscaq.aquila.infn.it will be soon disabled. My e-mail addresses are: zennaro@univ.trieste.it which is equivalent to na.zennaro@na-net.ornl.gov ------------------------------ From: William Mitchell Date: Fri, 10 Sep 93 14:34:37 EDT Subject: Change of Address for Bill Mitchell Effective immediately, my address, etc., is: William F. Mitchell Bldg 101 Room A238 NIST Gaithersburg, MD 20899-0001 office phone: (301) 975-3808 email: mitchell@cam.nist.gov Friends can find additional address information from na.whois. Bill Mitchell ------------------------------ From: John D. McCalpin Date: Wed, 8 Sep 1993 14:12:11 -0400 (EDT) Subject: Well-posedness of "Almost Hyperbolic" Systems In a variety of important subject areas, one drops time derivative terms from a hyperbolic system as a result of scaling arguments. The resulting systems are not hyperbolic and are rather tricky to analyze (e.g. Oliger and Sundstrum, SIAM J. Appl. Math, 1978). Does anyone know of any existence and uniqueness proofs for any configurations of such systems (e.g. the hydrostatic equations)? A very similar problem arises in the so-called "long-wave" models used in nearshore ocean wave studies. These equations are essentially a bi-directional version of the "Regularized Long-wave" equation, which, in turn, is similar to the well-known KdV equation. The only proof I know of in these areas is by Bona and Bryant, which shows that the RLW eq forms a well-posed initial-boundary-value problem with one initial condition and one boundary value. Unfortunately, since the RLW eq only has propagation in one direction, the important issue of wave reflection is not addressed by this proof. Finally, by some judicious approximating, the long-wave equations can be put into a form that might be called hyperbolic. That is, the system can be written such that, in each equation, all derivatives are along a single characteristic direction, but two of the characteristics are the same (their eigenvalues are zero). The system is deficient by one eigenvector, so it cannot be symmetrized. Has anyone out there worked with existence and uniqueness proofs for a system with this property? I am especially interested in the number and type of boundary conditions required, and have already found a regime in which "open" boundary conditions cannot be well-posed. John D. McCalpin mccalpin@perelandra.cms.udel.edu Assistant Professor mccalpin@brahms.udel.edu College of Marine Studies, U. Del. John.McCalpin@mvs.udel.edu ------------------------------ From: Roland Freund Date: Tue, 7 Sep 93 22:17 EDT Subject: QMRPACK is Available from NETLIB QMRPACK, a software package with FORTRAN-77 implementations of the QMR method and variants thereof, is now available from NETLIB. The package is distributed in the form of the compressed tar file "qmrpack.tar.Z" in the "linalg" section of NETLIB. You can obtain QMRPACK by using xnetlib or by anonymous ftp. In the latter case, ftp to "research.att.com" and then get the file "qmrpack.tar.Z" from the directory "netlib/linalg". QMR is a Lanczos-based Krylov subspace iteration for solving nonsingular nonsymmetric systems of linear equations; it also works for certain singular square systems. The two main features of QMR are (i) its smooth convergence behavior due to the global quasi-minimal residual property of its iterates, and (ii) the use of look-ahead techniques to avoid breakdowns and near-breakdowns in the underlying Lanczos algorithm. The package provides two different implementations of QMR, one based on three-term recurrences, and one based on coupled two-term recurrences. Since several people find it desirable to have iterative methods that require only a few lines of code, we have also included versions of QMR without look-ahead. In particular, there is code for "QMR from BCG", which generates QMR by simply adding one extra SAXPY to each BCG iteration. However, in view of their enhanced stability, we recommend the use of the "true" QMR methods with look-ahead. The package also contains a no-look-ahead version of TFQMR, which is a transpose-free variant of QMR. The package comes with two preconditioners: SSOR and a variant of Youcef Saad's ILUT preconditioner. Finally, the package also includes code for computing eigenvalues of nonsymmetric matrices, using the look-ahead Lanczos algorithm. At the moment, QMRPACK only contains single and double precision code for real systems. In the near future, we will add codes for complex systems, special variants of QMR for complex symmetric systems and symmetric indefinite systems with symmetric indefinite preconditioners, and an implementation of TFQMR with look-ahead. These additions to QMRPACK will be announced on na-digest. Enjoy, Roland Freund and Noel Nachtigal ------------------------------ From: Joe Grcar Date: Thu, 09 Sep 93 19:16:46 -0700 Subject: Difficulties with IEEE Arithmetic, part 2 Here's another reality check for IEEE arithmetic fans. The point of relating this story is: in my limited circle of R&D professionals I've encountered two unsolicited complaints about IEEE arithmetic in as many years. I suspect there are many scientists and engineers who've said "gee, that's a really stupid thing to do," but who haven't been heard by anyone who understands the ramifications of the complaint. A colleague with a PhD in mechanical engineering just walked into may office and said: "I like my new SGI Indigo, but I really don't like those NaN things it has. I'm rewriting a piece of software and when I looked at the output it was all full of NaN's. I found out this means I'm dividing by zero somewhere, but where? I liked the Vax a lot better because when it divided by zero it would just stop. That made it easy to find mistakes. I've spent all day in the debugger looking at NaN's trying to figure out where they're coming from. "Have you ever heard of this? Apparently the SGI is built so it can add these NaN's together, and multiply and divide them too, just like numbers. But that's a really stupid thing to do, because they aren't numbers. Is there any way to add something to not-a-number and get a-number? (I said I didn't think so.) "So what good are they? Why would anyone go through all this trouble just to get output that nobody wants? (So I said there is some way to turn off the NaN's. By chance I once asked SGI technical support where to find documentation on IEEE arithmetic. So I knew "man math" mentions NaN's, but in fact, it has only happy talk and a long list of "see also's". One of those, "man sigfpe," begins by discussing a struct called sigfpe_template. After several pages of that, there is something about environmental variables, but I doubt non-hackers get that far.) Regards, Joe Grcar ------------------------------ From: L. M. Delves Date: Fri, 10 Sep 93 15:45:33 +0100 (BST) Subject: F90 Test codes Institute of Advanced Scientific Computation, University of Liverpool IASC is in the final stages of a collaborative project (in fact, two separate projects) to develop: 1) A Fortran90 compiler, with parallel extensions for MIMD message-passing architectures. 2) An HPF Fortran source-source translator: HPF => F90+PVM These have been under development within two European-funded ESPRIT projects: Supernode II, and PPPE (Portable Parallel Programming Environments). We are now seeking material to test these on; and expressions of interest in the results of the projects. Offers of test codes: email me, or send the codes via email to: delves@liverpool.ac.uk Expressions of interest: to the same address; or write me at Mike Delves IASC University of Liverpool Liverpool, Meresyside, UK or voice +44 51 794 4752; or Fax +44 51 794 4754 All offers will be greatly appreciated. We solicit also codes accompanied by performance data on other F90 OR F77 compilers: please supply details of host configuration. Our compiler is currently hosted on 386/486 under OS/2, but implementations on Transputer T800/T9000, and on Sparc/Unix, are following close behind. Mike Delves ------------------------------ From: Arieh Iserles Date: Wed, 8 Sep 93 11:50:06 +0100 (BST) Subject: Re: SIAM Meetings In the last issue of na-net Rob Schreiber reacted briefly to Gene Golub's recent complaint about the dedication of a session at a SIAM meeting to a commercial product. The points raised by Gene are of fundamental importance and their impact goes well beyond the organization and scheduling of scientific meetings. Hence, I believe that it is vital to discuss them and, specifically and without rancour, to disagree with Rob's main premise. It is true that scientists use commercial products in their research and that the discussion of such tools is legitimate and, indeed, occasionally helpful. This, however, is not the end of the story. Many of us must have come across blatant commercialization of the (excuse the high-sounding phrase) scientific enterprise: * Thus, presentation and hard-sell of commercial products under the guise of a bona fide scientific session. It is fair to say that MathWorks Inc. (the Matlab people) have behaved, in my experience, with an enviable integrity. Other vendors have less scruples and I have witnessed my share of presentations that would not have `disgraced' a television commercial (or television evangelism, for that matter). * Thus, talks in scientific conferences that consist, to larger or lesser degree, in overtly promoting a commercial product in which the speaker has a pecuniary interest. How am I to believe the speaker that the new algorithm is, indeed, superior to everything in sight, if the boundary between the scientific and the commercial is blurred? The statement that `FFT is faster than matrix multiplication' is scientific and you can argue its merits on scholarly grounds. The jingle `Donkin Donuts -- the best coffee in the world', however, is a purely commercial hyperbole. * Thus, the relatively new phenomenon of individuals (usually with former university base) becoming software entrepreneurs. In principle, this is a welcome development and the field of scientific software will benefit from the influx of experienced, often brilliant, researchers. The situation, however, is fraught with danger. Thus, assume that Professor Bloggs, of great and well-deserved reputation, abandons a university career to manufacture and market software based on her/his latest algorithm to digitize differential widgets. Few years later, as is in the nature of things, Dr Cloggs, a young postdoc at the other end of the world, comes up with arguably superior (and completely different) algorithm. However, Bloggs the entrepreneur is also Bloggs the reputable scientist -- a referee, an editor, member of numerous committees that decide on careers and budgets. How will Bloggs react to a development that is likely to wipe out her/his new livelihood? How will Cloggs trust in Bloggs's honesty? Commercialization is with us and it cannot be wished away. We should realize this and, as a community, take steps that allow us to reconcile integrity with the new state of affairs. After all, scientists, as human beings, are divided on a multitude of grounds -- national, political, religious... We belong to different scholarly cultures and different affinity networks. So far, the `system' managed to get it mostly right. How well, however, will it cope with commercial pressures? To which extent will we be able to trust speakers, papers, referee reports, grant-awarding agencies, if we know the overwhelming commercial interest in the `outcome'? It is not just a matter of individuals behaving with honesty and integrity -- and I trust that most of them will -- but also of the recognition at the receiving end that it is so. Inasmuch as there are no simple answers, we should discuss this state of affairs, with a view toward agreeing on a code of conduct that will allow the numerical community to rip the benefits of commercial developments without falling pray to their perils. This should not interfere with the overwhelming majority of individuals trying to make their livelihood from software or endeavouring to use it in their research. To the contrary -- maintaining clear and acknowledged standards should help many to reconcile commercial pressures with scientific integrity and assist the numerical community as a whole in trading commercial hype off for valuable information. In the last decade or so universities in different parts of the world have been coming under an increasing pressure from their paymasters to behave as commercial organizations. This is a sad development with immediate and severe dangers to the fabric of research and teaching. The more we distinguish clearly and overtly between the commercial and the scholarly, the better we should be able, as a community, to recognize (and, hopefully, to resist) unwelcome pressures from politicians who, in a memorable phrase, know the price of everything but the value of nothing. To return to the starting point and Rob's reaction to Gene's complaint -- there is nothing wrong in discussing a software system at a scientific meeting as long as there is a firm distinction between the scholarly and the commercial part and as long as everybody knows exactly what is what. -- Arieh Iserles ------------------------------ From: Julio G. Dix Date: Wed, 8 Sep 1993 11:01:34 -0500 Subject: Electronic Journal of Differential Equations (EJDE) ELECTRONIC JOURNAL OF DIFFERENTIAL EQUATIONS (EJDE) Mathematicians at Southwest Texas State University and at the University of North Texas have collaborated to establish a new journal, the ELECTRONIC JOURNAL OF DIFFERENTIAL EQUATIONS (EJDE). The EJDE will be a strictly electronic journal dealing with all aspects of differential equations. Articles will be submitted as TeX files, sent to referees electronically, and then disseminated electronically, free of charge. Although the time between submission and dissemination will be greatly reduced, only original research of high quality will be accepted. Each article will be subject to as rigid a peer review process as is applied by the finest of today's printed journals. The EJDE is calling for papers now. There are no page charges. The EJDE can be accessed via ftp (login: ftp), gopher, and telnet (login: ejde) to "ejde.math.swt.edu" or to "ejde.math.unt.edu". Examples illustrating these options are: 1. "telnet ejde.math.swt.edu", login: "ejde" . (It may be necessary to set your terminal to emulate a VT100.) 2. "telnet e-math.ams.com", login: "e-math", password: "e-math", select "Mathematical Publications", then "Other Mathematical Publications", and then "Electronic Journal of Differential Equations". 3. "ftp ejde.math.swt.edu", login: "ftp", and "cd pub". 4. Provided that the gopher-client software is loaded on the reader's computer."gopher ejde.math.unt.edu". Readers can transfer the TeX and Postscript files to their own computers and then read them or print hard copies. A free subscription to the abstracts of new articles in the EJDE is available by sending an e-mail message to "subs@ejde.math.swt.edu". Suggestions and comments should be sent to "editor@ejde.math.unt.edu" or to "editor@ejde.math.swt.edu". Identical copies of the EJDE will be originated and maintained at Southwest Texas State University and at the University of North Texas. For posterity and for interlibrary loan, a hard copy exists in the libraries at both institutions. The Managing Editors of EJDE are Alfonso Castro, Julio Dix, Gregory Passty, and Ricardo Torrejon. The Editorial Board consists of P. Bates (Brigham Young University) A. Bloch (Ohio State University) J. Bona (Pennsylvania State University) K. J. Brown (Heriot-Watt University) L. Caffarelli (Institute for Advanced Study) C. Castillo-Chavez (Cornell) C. Chui (Texas A & M University) M. Crandall (University of California at Santa Barbara) E. Di Benedetto (Northwestern University) G. B. Ermentrout (University of Pittsburgh) J. Escobar (Indiana University) L. C. Evans (University of California at Berkeley) J. Goldstein (Louisiana State University) C. Groetsch (University of Cincinnati) I. Herbst (University of Virginia) C. Kenig (University of Chicago) R. Kohn (Courant Institute) A. Lazer (Miami University) J. Neuberger (University of North Texas) P. H. Rabinowitz (University of Wisconsin) R. Shivaji (Mississippi State University) R. Showalter (University of Texas) H. Smith (Arizona State University) P. Souganidis (University of Wisconsin) N. Walkington (Carnegie-Mellon University) ------------------------------ From: Lothar Reichel Date: Wed, 8 Sep 93 19:56:55 EDT Subject: New Book, Numerical Linear Algebra NEW BOOK ANNOUNCEMENT Title: Numerical Linear Algebra Editors: L. Reichel, A. Ruttan and R.S. Varga Publisher: W. de Gruyter, Berlin, 1993. ISBN: 3-11-013784-4 About the Book: On March 13-14, 1992, a meeting of the Western Pennsylvania and Eastern Ohio Section of SIAM, with the title Numerical Linear Algebra and Scientific Computing was held at Kent State University, Kent, Ohio. In the short period of two days, the roughly 60 participants heard new research results in Numerical Linear Algebra from acknowledged leaders in the field. The talks displayed the present activity in this area of Numerical Analysis and illustrated the wide diversity of the ongoing research. Some of the topics covered in papers of the proceedings: * Iterative methods for large linear systems of equations. Papers present new variants of the QMR, GMRES and SOR methods. * Preconditioning of linear systems of equations. Papers discuss block circulant preconditioners with application to image restoration and the use of the block-ADI iterative method for preconditioning. * Generalized M-matrices and ultrametric matrices. * Algorithms for eigenvalue problems. A new more stable variant of Rutishauser's qd algorithm is presnted, as well as a divide-and-conquer algorithm for the generalized symmetric tridiagonal eigenvalue problem. * An algorithm of interest for the computation of the singular value decomposition of products of matrices. * Ill-posed problems in image resoration. * Implementation of iterative methods on sequential and parallel computers. Contributing authors: A. Bojanczyk, C.F. Borges, D. Calvetti, M. Eiermann, K.V. Fernando, R.W. Freund, W.B. Gragg, M. Hanke, S. Ma, R. Nabben, N.M. Nachtigal, J. Nagy, B.N. Parlett, J. Petersen, R. Plemmons, L. Reichel, Y. Saad, P. Van Dooren, R.S. Varga Information on ordering: For the USA, Canada and Mexico: Walter de Gruyter,Inc. 200 Saw Mill Road Hawthorne, NY 10532, U.S.A. Phone (914) 747-0110 Telex 646677 Fax (914) 747-1326 Price: US $79.95 For other countries: Walter de Gruyter & Co. Postfach 303421 10728 Berlin Germany Phone +49-30-26005-161 Telex 184027 Fax +49-30-26005-222 Price: DM 168,- ------------------------------ From: Gil Strang Date: Thu, 9 Sep 93 11:53:21 EDT Subject: New Book, Introduction to Linear Algebra Gil Strang's linear algebra text and MATLAB diskette The new textbook Introduction to Linear Algebra is published by Wellesley-Cambridge Press. The good way to obtain a copy is by email to gs@math.mit.edu Chapters 1-6 are for the basic course in linear algebra. The book ends with the SVD and FFT and matrix applications to networks and computer graphics. The accompanying MATLAB diskette (PC or Mac) will soon be available from info@mathworks.com. It contains 25 Teaching Codes, each with an M-file of examples and exercises written by Cleve Moler and Gil Strang. The Toolbox also comes by anonymous ftp to ftp.mathworks.com in file pub/toolkits/Strang or by email request to linalg@math.mit.edu The text is widely adopted already this fall. It starts more gradually than the earlier book Linear Algebra and Its Applications - and computing gives students a way to work with matrices. -- Gil Strang ------------------------------ From: Larry Norris Date: Fri, 10 Sep 93 17:01:56 EDT Subject: Cornelius Lanczos International Centenary Conference CORNELIUS LANCZOS INTERNATIONAL CENTENARY CONFERENCE December 12-17,1993 North Carolina State University Raleigh, NC, USA To celebrate the 100th anniversary of the birth of Cornelius Lanczos (1893-1974) , North Carolina State University together with other sponsors will hold an international conference from Sunday 12 December through Friday 17 December 1993. The conference will reflect the wide interests of Cornelius Lanczos in computational mathematics, theoretical physics, and astrophysics. PROGRAM The program of the conference includes approximately twenty-six invited plenary speakers and twenty-five minisymposia which will deal with the research topics listed below. The invited plenary papers and the minisymposium papers will be published in the proceedings of the conference. Also, the conference will include sessions of contributed papers in the form of twelve minute talks and poster sessions. The contributed talks and posters can be on any topic in the areas of computational mathematics, theoretical physics, and astrophysics. SECOND CALL FOR PAPERS The closing date for receiving abstracts for oral contributed and poster papers for publication in the final program has been extended to 1 October 1993. There is also a late paper deadline of 1 December, 1993, for both oral and poster papers. We cannot guarantee that abstracts received after 1 October will be published in the final program. However, we will publish abstracts of late papers in an addendum to the final program which will be distributed with the final program and other registration materials at the conference. PLENARY SPEAKERS ********** Computational Mathematics ********** James W. Cooley Lanczos and the FFT: A discovery before its time Jane K. Cullum Lanczos algorithms for large scale nonsymmetric and symmetric matrix eigenvalue computations Roland W. Freund The Look-Ahead Lanczos Process for Nonsymmetric Matrices and Its Applications Gene H. Golub Uses & Abuses of the Lanczos Algorithm Anne Greenbaum The Lanczos and Conjugate Gradient Algorithms in Finite Precision Arithmetic Martin H. Gutknecht The Lanczos Process and Pade Approximation Eduardo L. Ortiz The Tau Method of Lanczos and Related Numerical Methods for Differential Equations Chris Paige Solving equations and computing eigencomponents via the Lanczos process Beresford Parlett Do we fully understand the symmetric Lanczos algorithm yet? Robert J. Plemmons Some Matrix Computations in Adaptive Optics Pal Rozsa On Generalized Band Matrices and Their Inverses Youcef Saad Theoretical Error Bounds and General Analysis of a Few Lanczos Algorithms G. W. Stewart Lanczos and Linear Systems John Todd Reminiscences of Cornelius Lanczos ********** Theoretical Physics & Astrophysics ********** V. I. Arnold (to be confirmed) James B. Hartle The Classical Domain in a Quantum Universe Christopher Isham Quantum Gravity: What Are We Doing? Jerrold Marsden Some New Perspectives on Variational Principles in Mechanics Roger Penrose Relativity, Quantum Theory, and Computation Tsvi Piran Neutron Star Mergers and Gamma-Ray Bursts, Possibly the Strongest Explosions in the Universe John J. Stachel Lanczos's Contributions to General Relativity Yasushi Takahashi Four Dimensional Vector and the Gauge Transformation Claudio Teitelboim Black Hole Entropy and Dimensional Continuation Kip S. Thorne Gravitational Waves: Challenges, Plans and Prospects Michael S. Turner The Remarkable Success Story of the Big Bang Cosmology John A. Wheeler James W. York Black Holes In Thermal Equilibrium MINISYMPOSIA Computational Mathematics: M. Berry Software for Lanczos-based Algorithms A. Bjorck Least Squares Dan Boley Control Applications D. Calvetti Moments in Numerical Analysis M.T. Chu & John Lewis Eigenvalue Computations C. K. Chui Wavelets J. Cooley Development of the FFT E. Ortiz Tau Method and Chebyshev Polynomials R.J. Plemmons The FFT in Signal Processing H. Van der Vorst Iterative Methods for Linear Systems Theoretical Physics & Astrophysics: Paul Anderson Black Hole Evaporation and Thermodynamics J. Blondin & J. Stone Computational Magnetohydrodynamics in Astrophysics A. Kashlinsky Galaxy Formation and Large-Scale Structure of the Universe M. Scholer & D. Winske Numerical Simulations of Collisionless Space Plasmas C.M. Will Detection of Gravitational Radiation from Astrophysical Sources J. Isenberg Cauchy Problem of General Relativity D. Garfinkle Cosmic Censorship P. Dolan & A.H. Taub Lanczos H-tensor M. J. Gotay & P. Olver Symplectic Methods in Physics K.V. Kuchar The Problem of Time in Quantum Gravity J.J. Halliwell Decoherence and the Foundations of Quantum Mechanics T. Ratiu & T. Bloch Geometric Mechanics L. Smolin New Variables and Loop Quantization P.H. Frampton, T.W. Kephart & M. Sher Supercollider Physics C. Carlson & A. Szczepaniak Open Questions in Particle Theory FURTHER INFORMATION A first circular was sent out in late Fall, 1992, through the SIAM, APS and GRG mailing lists. A second circular giving details about the program and related information was distributed in early June, 1993. If you wish to receive a copy of the second circular, or wish to receive the preliminary program (scheduled for mailing in early October) please write to: Cornelius Lanczos International Centenary Conference, Attn: Sheehan/Heggie, NCSU/OCE&PD, Box 7401, Raleigh, NC, 27695-7401, USA or contact through e-mail: lanczos@math.ncsu.edu. ------------------------------ From: Jack Dongarra Date: Sat, 11 Sep 93 09:53:34 -0400 Subject: Scalable High Performance Computing Conference PRELIMINARY ANNOUNCEMENT THE 1994 SCALABLE HIGH PERFORMANCE COMPUTING CONFERENCE SHPCC94 Knoxville, Tennessee May 23 - 25, 1994 ORGANIZING INSTITUTIONS University of Tennessee Oak Ridge National Laboratory Sponsored by IEEE Computer Society GENERAL CHAIR PROGRAM CHAIR Jack Dongarra David W. Walker PROGRAM COMMITTEE: David Bailey Paul Pierce William Gropp Sanjay Ranka Rolf Hempel Gary Sabot Anthony Hey Robert Schreiber Charles Koelbel Bernard Tourancheau Steve Otto Robert van de Geijn Cherri Pancake Katherine Yelick SPECIAL FEATURES: Tutorials Published Proceedings INVITED SPEAKERS: Guy Blelloch, Carnegie Mellon University Phil Colella, University of California, Berkeley David Culler, University of California, Berkeley Monica Lam, Stanford University Marc Snir, IBM T.J. Watson Research Center TOPICS OF INTEREST: Architectures Load Balancing Artificial Intelligence Linear Algebra Compilers Neural Networks Concurrent Languages Non-numerical Algorithms Fault Tolerance Operating Systems Image Processing Programming Environments Large-scale Applications Scalable Libraries C++ CONFERENCE DEADLINES: Extended Abstracts November 1, 1993 Abstracts of posters November 1, 1993 Notified of acceptance January 14, 1994 Camera-ready copy of paper February 14, 1994 Lodging Reservations March 1, 1994 Early Registration March 1, 1994 More detailed questions can be sent to: walker@msr.epm.ornl.gov ------------------------------ From: Karsten M. Decker Date: Sun, 12 Sep 93 15:45:04 +0200 Subject: IFIP Conference on Programming Environments CALL FOR PAPERS IFIP WG10.3 WORKING CONFERENCE ON PROGRAMMING ENVIRONMENTS FOR MASSIVELY PARALLEL DISTRIBUTED SYSTEMS April 25 - 30, 1994 Monte Verita, Ascona, Switzerland Massively parallel systems with distributed resources will play a very important role for the future of high performance computing. One of the current obstacles of these systems is their difficult programming. The proposed conference will bring together active researchers who are working on ways how to help programmers to exploit the performance potential of massively parallel systems. The working conference will consist of sessions for full and short papers, interleaved with poster and demonstration sessions. The Conference will be held April 25 - 30, 1994 at the Centro Stefano Franscini, located in the hills above Ascona at Lago Maggiore, in the southern part of Switzerland. It is organized by the Swiss Scientific Computing Center CSCS ETH Zurich. The conference is the forthcoming event of the working group WG 10.3 of the International Federation for Information Processing (IFIP) on Programming Environments for Parallel Computing. The conference succeeds the 1992 Edinburgh conference on Programming Environments for Parallel Computing. SUBMISSION OF PAPERS Submission of papers is invited in the following areas: -- Programming models for parallel distributed computing -- Computational models for parallel distributed computing -- Program transformation tools -- Concepts and tools for the design of parallel distributed algorithms -- Reusability in parallel distributed programming -- Concepts and tools for debugging massively parallel systems (100+ processing nodes) -- Concepts and tools for performance monitoring of massively parallel systems (100+ processing nodes) -- Tools for application development on massively parallel systems -- Support for computational scientists: what do they really need ? -- Application libraries (e.g., BLAS, etc.) for parallel distributed systems: what do they really offer ? -- Problem solving environments for parallel distributed programming Authors are invited to submit complete, original, papers reflecting their current research results. All submitted papers will be refereed for quality and originality. The program committee reserves the right to accept a submission as a long, short, or poster presentation paper. Manuscripts should be double spaced, should include an abstract, and should be limited to 5000 words (20 double spaced pages); The contact authors are requested to list e-mail addresses if available. Fax or electronic submissions will not be considered. Please submit 5 copies of the complete paper to the following address: PD Dr. Karsten M. Decker IFIP 94 CSCS-ETH Zurich Via Cantonale CH-6928 Manno Switzerland IMPORTANT DATES Deadline for submission: December 1, 1993 Notification of acceptance: February 1, 1994 Final versions: March 1, 1994 CONFERENCE CHAIR Karsten M. Decker CSCS-ETH Zurich Via Cantonale CH-6928 Manno Switzerland phone: +41 (91) 50 8233 fax: +41 (91) 50 6711 e-mail: decker@serd.cscs.ch For more information, send email to ifip94@cscs.ch == Karsten M. Decker ------------------------------ From: Ray Zahar Date: Mon, 13 Sep 93 03:44:18 EDT Subject: Symposium in Honor of Walter Gautschi In recognition of Walter Gautschi's contributions to mathematics and computer science, and to celebrate his sixty-fifth birthday, a conference is to be held in his honor: International Symposium on Special Functions, Approximation, Numerical Quadrature and Orthogonal Polynomials Celebrating the Sixty-Fifth Birthday of Walter Gautschi SPONSOR: Purdue University DATES: The conference begins at 2:00pm on December 2, and continues until the evening of December 4, 1993 LOCATION: Purdue Memorial Union Purdue University West Lafayette, Indiana U.S.A. 47907 SPEAKERS: The program is comprised of invited talks on the four main themes of the conference: ONE-HOUR SPEAKERS: R.A. Askey, E.W. Cheney, G. Dahlquist, G.H. Golub W.B. Gragg, J. Korevaar, J.N. Lyness, F.W.J. Olver, R.S. Varga HALF-HOUR SPEAKERS: A. Bellen, J.C. Butcher, J.R. Cash, P.J. Davis, C. de Boor, B.D. Flury, D. Gottlieb, M.H. Gutknecht, A. Iserles, W.B. Jones, H.J. Landau, S. Li, G. Mastroianni, C.A. Micchelli, G.V. Milovanovic, G. Monegato, M.E. Muldoon, S.E. Notaris, L. Reichel, W.C. Rheinboldt, T.J. Rivlin, S. Ruscheweyh, E. Saff, F. Stenger, N.M. Temme, J. Wimp, R. Wong, M. Zhang PUBLICATION: Proceedings of the conference will be published in book form. Participants (other than the invited speakers) are invited to contribute articles to the refereed proceedings. The final date for submission of papers is December 5, 1993. ABSTRACTS: All abstracts should be sent by October 15, 1993 to the e-mail address: icsfaq@iro.umontreal.ca or to: Professor R.V.M. Zahar Departement d'IRO Universite de Montreal C.P. 6128, Succ. "A" Montreal, Quebec CANADA H3C 3J7 Tel: (514) 343-7481 FURTHER INFORMATION: Details on registration, accommodation and travel as well as updated information on the talks, can be obtained via anonymous ftp at: address: ftp.iro.umontreal.ca directory: pub/numerik/Gautschi_Symposium filename: Gautschi_Symposium ------------------------------ From: D. Sloan Date: Thu, 9 Sep 93 17:41:15 +0100 (BST) Subject: Positions at University of Srathclyde UNIVERSITY OF STRATHCLYDE DEPARTMENT OF MATHEMATICS The University of Srathclyde, Glasgow, invites applications for two new appointments in the Department of Mathematics-- 1. Lectureship/Senior Lectureship in Continuum Mechanics (Ref 84/93) Candidates should have research experience in continuum mechanics and preferably in anisotropic fluids. The successful candidate will strengthen research and teaching in continuum mechanics. An exceptionally well-qualified candidate may be offered appointment at Senior Lectureship level. Salary:- up to 29,788 pounds per annum. 2. Lectureship in Nonlinear Analysis (Ref 82/93) Candidates should have research experience in nonlinear analysis and preferably in nonlinear dynamical systems. The successful candidate is expected to straddle current departmental research interests in applied analysis and numerical analysis. Salary:- 13,601 - 25,107 pounds per annum. For application form and further particulars (please quote reference number) contact the Personnel Office, University of Strathclyde, Glasgow, G1 1XQ. Applications closing date:- 13th October 1993. ------------------------------ From: SIAM Date: Thu, 09 Sep 93 14:39:29 EST Subject: SIAM Catalogs Available CATALOGS AVAILABLE The SIAM 93-94 Publications Catalog is available upon request. It includes descriptions of all SIAM books in print. The SIAM 1994 Periodicals Catalog is also available and includes SIAM journal descriptions and editorial boards. Catalog requests should be sent to: service@siam.org Please specify which catalog(s) you are interested in recieving. SIAM* 3600 Science Center* Philadelphia, PA* 19104* USA 215-382-9800* FAX 215-386-7999 ------------------------------ From: Jack Dongarra Date: Fri, 10 Sep 93 08:21:27 -0400 Subject: Contents: International Journal of Supercomputer Applications International Journal of Supercomputer Applications Volume 7.3 Fall 1993 Anna Nagurney, Guest Editor Special Issue on Computational Ecomonics Simulating Normal Rectangle Probabilities and Their Derivatives: The Effects of Vectorization Vassilis Hajivassiliou A Globally Convex Agricultural Production System: Parameter Estimation Agapi Somwaru and Kenneth Hanson Econometric Model Simulation on Parallel Computers Manfred Gilli and Giorgio Pauletto A Numerical Solution Algorithm for Solving Models with Incomplete Markets ayse Imrohoroglu, Selahattin Imrohoroglu, and Douglas Joines Forward Looking Behavior and Learning in Stochastic Control Hans Amman and David Kendrick Computational Issues in the Statistical Design and Analysis of Experimental Games Mahmoud El-Gamal, Richard McKelvey, and Thomas Palfrey ------------------------------ End of NA Digest ************************** -------