From surfer.EPM.ORNL.GOV!nacomb Sun Jun 9 14:32:50 0400 1991 Received: by pyxis; Sun Jun 9 14:33 EDT 1991 To: pyxis!ehg Received: by inet.att.com; Sun Jun 9 14:33 EDT 1991 Received: by surfer.EPM.ORNL.GOV (5.61/1.34) id AA06655; Sun, 9 Jun 91 14:32:50 -0400 Date: Sun, 9 Jun 91 14:32:50 -0400 From: nacomb@surfer.EPM.ORNL.GOV (NA-NET) Message-Id: <9106091832.AA06655@surfer.EPM.ORNL.GOV> Subject: NA Digest, V. 91, # 23 Comment: Submissions for NA News Digest, mail to na.digest@na-net.ornl.gov. Comment: Information about NA-NET, mail to na.help@na-net.ornl.gov. Comment: Comments about the NA-NET, mail to nanet@na-net.ornl.gov. Apparently-To: ehg@research.att.com NA Digest Sunday, June 9, 1991 Volume 91 : Issue 23 Today's Editor: Cleve Moler Today's Topics: Looking for Very Large, Unsymmetric, Sparse Matrices Boundary Element Method Question on Non-Linear Least Squares SVD and Signal Processing Book Available New Edition of Lambert's ODE book Vacant Position at Brussels Free University Opening for Contract Software Tester Dundee Conference Talks Parallel Numerical Analysis Workshop Symposium on Computer Arithmetic Conference in Italy on Domain Decomposition Conference in France on High Performance Computing Guidelines for The Hans Schneider Prize ------------------------------------------------------- From: Tim Davis Date: Wed, 5 Jun 91 13:31:53 -0400 Subject: Looking for Very Large, Unsymmetric, Sparse Matrices We're developing an unsymmetric sparse LU factorization algorithm that uses the Level-3 BLAS in its innermost loops. It should perform best on very large unsymmetric sparse matrices that have very asymmetric nonzero pattern and that are not extremely sparse. Unfortunately, the Harwell/Boeing sparse matrix collection [1] has only a few matrices that fit this classification. We would be interested in getting in contact with anyone who could contribute this type of matrix. In exchange for your efforts you would be assisting in the development of an algorithm that is targeted towards your application. We would prefer to receive matrices on Sun cartridge tape in the Harwell/Boeing format (see [1]), but any format would be suitable as long as it's readable. We would prefer both values and pattern, but pattern-only would suffice. Code that generates application-specific matrices of arbitrary size would also be welcome. Tim Davis Computer and Information Sciences Department 301 CSE University of Florida Gainesville, FL 32611-2024, USA email: davis@cis.ufl.edu or na.tdavis@na-net.ornl.gov phone: (904) 392-1481 [1] I. S. Duff, R. G. Grimes, and J. G. Lewis, "Sparse Matrix Test Problems," ACM Trans. Math. Softw., vol. 15, no. 1., March 1989, pp. 1-14. ------------------------------ From: David Halpern Date: 5 Jun 91 21:58:11 GMT Subject: Boundary Element Method I'm interested in finding out whether there are software packages in Fortran that solve Stokes equations or linear elasiticity equations using boundary element methods. There is a new book on microhydrodynamics by S. Kim (Wisconsin) which includes a big section on the application of BEM to fluid problems. There is also an internet address (somewhere in Wisconsin?) from which one can ftp various programs. Has anyone tried this and if so what is the address? David Halpern Biomedical Enginnering Northwestern University Evanston IL ------------------------------ From: Dave Chin Date: 5 Jun 91 21:28:41 GMT Subject: Question on Non-Linear Least Squares Howdy! I am currently writing a driver to use SLATEC's non-linear least-squares fitting routine to fit a curve to some data. It works fine with simple stuff, but the results I get don't look right (by looking at a plot of the fit against the data). My question is: does anyone know in some detail how the algorithm behaves? (SLATEC uses a version of the Levenson-Marquadt algorithm -- I can't find any references in the libraries at Cornell [maybe I'm not looking hard enough]). Thanks in advance. Dave Chin Class of '92, Cornell U. iojj@vax5.cit.cornell.edu ------------------------------ From: Rick Vaccaro Date: Mon, 3 Jun 91 10:08:01 EDT Subject: SVD and Signal Processing Book Available The following book has just been published SVD and Signal Processing II Elsevier Science Publishers R.J. Vaccaro, editor ISBN 0-444-88896-9. The book is a spin-off of the 2nd International Workshop on SVD and Signal Processing which was held in Kingston, Rhode Island, June 25-27, 1990. It consists of 32 papers divided into five sections: Survey Papers, Algorithms and Architectures, Analysis of SVD-Based Algorithms, Applications to Signal Modeling and Detection, and Other Applications. This book examines in detail the singular value decomposition of a matrix and its applications to problems in signal processing. Algorithms and implementation architectures for computing the SVD are discussed, and analysis techniques for predicting and understanding the performance of SVD-based algorithms are given. The price is US$ 85.00 / Dfl. 220.00 and the book may be ordered from Elsevier Science Publishing Co. P.O. Box 882, Madison Square Station New York, NY 10159 or Elsevier Science Publishers P.O. Box 211 1000 AE Amsterdam, The Netherlands. ------------------------------ From: D. F. Griffiths Date: Wed, 5 Jun 91 08:45:40 BST Subject: New Edition of Lambert's ODE book Jack Lambert has recently completed a replacement for his 1973 book Computational Methods in ODES. The new book is entitled Numerical Methods for Ordinary Differential Systems and will be published by Wileys (ISBN 0 471 92990 5) later this month. It is expected that copies will be appear at the book exhibition at the Dundee Conference. David Griffiths ------------------------------ From: Robert Beauwens Date: Sat, 08 Jun 91 19:00:00 +0200 Subject: Vacant Position at Brussels Free University VACANCE EXTERNE L'Universite Libre de Bruxelles annonce la vacance externe, a la Faculte des Sciences Appliquees, a partir du 1er octobre 1992 d'un poste de Charge de cours a temps plein ,charge des enseignements suivants : MATH101 - Analyse I (y compris calcul differentiel, calcul integral) Theorie 75 h. Exercices 75 h. 1ere annee du grade de candidat ingenieur civil. MATH102 - Analyse II (y compris calcul integral, elements du calcul des variations et du calcul des differences) Theorie 75 h. Exercices 75 h. 2eme annee du grade de candidat ingenieur civil. Les demandes des candidat(e)s doivent parvenir, accompagnees d'un curriculum vitae, a Mme le Recteur de l'Universite 50 avenue F.D. Roosevelt B-1050 Bruxelles avant le 15 decembre 1991. ------------------------------ From: Cheryl Checkoway Date: Fri, Jun 7, 1991 12:34:41 PM EDT Subject: Opening for Contract Software Tester Opening for Contract Software Tester The MathWorks is interested in hiring a software tester on a contract basis to work on alpha testing MATLAB, SIMULAB, and toolboxes. This position is expected to last 2-4 months, full-time over the summer and, potentially, part-time during the fall. The individual who fills this position will work with our in-house testing staff to plan and implement testing in terms of both electronic test suites and interactive testing. Requirements include a solid background in mathematics, including linear algebra, and proficiency as a Unix user. Working familiarity with PCs and Macintosh computers as well as formal testing experience and prior use of MATLAB are desirable. In addition, a bachelor's degree in math, engineering, or computer science, and the ability to program in C would be definite pluses. Please mail, fax, or email resumes. My email address is cheryl@mathworks.com. Our fax number is 508-653-2997. Cheryl Checkoway The MathWorks 24 Prime Park Way Natick, MA 01760 ------------------------------ From: D. F. Griffiths Date: Sat, 8 Jun 91 17:32:44 BST Subject: Dundee Conference Talks 14th BIENNIAL CONFERENCE ON NUMERICAL ANALYSIS UNIVERSITY OF DUNDEE 25 - 28 June, 1991 A R MITCHELL LECTURE Matrices, moments and quadrature G. H. Golub, Stanford University. Invited talks Pivoting and stability in the augmented system method Ake Bjorck, Linkoping University, Sweden Portable Numerical Software for High Performance Parallel Machines James Demmel, University of California at Berkeley, USA. A Parallel Algorithm for the Non-symmetric Eigenvalue Problem Jack Dongarra, University of Tennessee and Oak Ridge National Laboratory, USA. A personal view of large-scale nonlinear programming Nick Gould, Rutherford Appleton Laboratory. A Review of Uniform Subdivision John A. Gregory, Brunel University Numerical analysis of functional equations with a variable delay A. Iserles and Martin Buhmann, University of Cambridge. The Slightly Compressible Navier-Stokes Equations Jens Lorenz, The University of New Mexico, USA. Upwinded Test Functions for Finite Element and Finite Volume Methods K.W. Morton, University of Oxford. The complexity of Karmarkar's algorithm for linear programming M. J. D. Powell, University of Cambridge. Variable steps for symplectic integrators J. M. Sanz-Serna and M. P. Calvo, Universidad de Valladolid, Spain Nonlinear Parameter Estimation: Models, Criteria, Algorithms Hubert Schwetlick, Martin Luther University, Germany Unconventional methods for boundary integral equations in the plane Ian H. Sloan Numerical methods for hyperbolic integro-differential equations Vidar Thomee, Chalmers University of Technology, Sweden. Non-Normal Matrices and Pseudospectra Lloyd N. Trefethen, Cornell University,USA. Analysis of an adaptive finite-difference method for time dependent PDEs J. G. Verwer and R. A. Trombert, CWI, Amsterdam. There will be, in addition, 100 contributed talks in four parallel sessions. Authors of contributed papers will be notified during the next few days. A limited number of late registrations will be accepted. Contact D F Griffiths dfg@uk.ac.dund.mcs or na.griffiths@na-net.ornl.gov ------------------------------ From: Frank Plab Date: 5 Jun 91 19:41:15 GMT Subject: Parallel Numerical Analysis Workshop FINAL CALL FOR PARTICIPATION One-Day Workshop on PARALLEL NUMERICAL ANALYSIS sponsored by Edinburgh Parallel Computing Centre University of Edinburgh 21 June 1991 A one-day workshop on Parallel Computing in Numerical Analysis will be held at the Edinburgh Parallel Computing Centre (EPCC) on Friday, 21 June 1991. The workshop should give numerical analysts and other interested researchers an opportunity to exchange experiences in parallelising numerical algorithms. Invited presentations: Prof Iain Duff (Rutherford Appleton Laboratory) "Exploitation of Parallelism in the Solution of Sparse Systems" Dr Peter Mayes (Numerical Algorithms Group) "Parallelism and the NAG library" Organising committee: Frank Plab (Edinburgh Parallel Computing Centre) Ken McKinnon (Dept of Mathematics, University of Edinburgh) Dugald Duncan (Dept of Mathematics, Heriot-Watt University) The Edinburgh Parallel Computing Centre (EPCC) is a multi-disciplinary institution engaged in research and commercial development in parallel computing. It is home to a wide range of parallel computing equipment, including: a Computing Surface with more than 400 T800 transputers and over 300 users; the UK Grand Challenge machine, which contains 64 i860/T800 hybrid nodes; and both a 64x64 and a 32x32 AMT DAP. EPCC has a full-time staff of 26, and a large number of associates in computer science, physical and mathematical sciences. ------------------------------ From: George Corliss Date: Mon, 3 Jun 91 19:02:34 CDT Subject: Symposium on Computer Arithmetic Conference of potential interest to numerical analysts: SCAN-91 IMACS-GAMM International Symposium on Computer Arithmetic and Scientific Computing Dates: October 1 - 4, 1991 Location: Universitaet Oldenburg, Germany (near Bremen) The symposium provides a forum for interaction among researchers and practitioners in computer arithmetic and scientific computing. The themes of the meeting include contemporary computer arithmetic, computer arithmetic and programming languages, environments, enclosure methods, interval arithmetic algorithms. Earlier instances of this symposium have been held in Karlsruhe (Germany), Basel (Switzerland), and Albena (Bulgaria). Potential contributors should submit one page abstracts to arrive in Oldenburg no later than June 15, 1991. Social activities will include a "gemuetlichen Bierabend" in the "Hengelbraeu" (reception) and a whole day excursion to the island of Helgoland on the October 3 national holiday. For further official information, contact Prof. Dr. J. Herzberger Fachbereich Mathematik Universitaet Oldenberg W-2900 Oldenburg G E R M A N Y For informal information, contact George F. Corliss Mathematics and Computer Science Division Argonne National Laboratory 9700 S. Cass Ave. Argonne, IL 60439-4844 Office: (708) 972-6188 Fax: (708) 972-5986 corliss@mcs.anl.gov ------------------------------ From: Alfio Quarteroni Date: Thu, 6 Jun 91 09:29:44 -0500 Subject: Conference in Italy on Domain Decomposition Announcement and Call for Papers: 6th International Conference on DOMAIN DECOMPOSITION METHODS Location: Villa Olmo, COMO, Italy Date: 15-19 June 1992 Organizers: A.Quarteroni, L.D.Marini, A.Valli, A.Russo Scientific Committee: J.H.Bramble, T.F.Chan, G.H.Golub, R.Glowinski, Yu.A.Kuznetsov, J.Periaux, A.Quarteroni, O.B.Widlund. Conference Themes: Numerical Analysis of Domain Decomposition, Block and Substructuring Methods, Multilevel Methods, Domain Decomposition for Time Dependent Problems, Interface Conditions for Heterogeneous Domain Decomposition, Parallel Implementation, Multibody Dynamics, Decomposition Methods in Microelectronics, Environmental Sciences, Applications in Science and Engineering. APPLICATION FORM SHOULD BE REQUESTED TO: DOMDEC6@IPVIAN.BITNET Alfio Quarteroni ------------------------------ From: Marc Durand Date: Thu, 06 Jun 91 21:15:49 GMT Subject: Conference in France on High Performance Computing 2nd SYMPOSIUM on HIGH PERFORMANCE COMPUTING October 7-9, 1991 MONTPELLIER - FRANCE Organized by CNUSC Centre National Universitaire Sud de Calcul CNSF Cornell National Supercomputer Facility INRIA Institut National de Recherche en Informatique et en Automatique IBM SCOPE This is the second of a series of biennial symposia, which intend to be a forum for specialists working in various domains associated with Intensive Computing (Parallelism, Vectorization and Scalar).The growth of scientific computing devices, has led, through new disciplines such as Parallel Numerical Analysis, to a rapprochement of domains usually separated. So the main purpose of this meeting is to give scientists an opportunity to investigate interactively areas such as Architecture of Supercomputers, Compilers, Algorithms, Computational Methods, Mathematical Software, Numerical Applications, etc. The symposium will feature, in addition to 6 general purpose plenary sessions, 15 parallel sessions dedicated to more specialized topics. It will allow anyone from academia or industry to gather information about state-of-the-art achievements together with trends and perspectives in research. INVITED SPEAKERS W. Camp (USA) / Sandia National Laboratories, Albuquerque "Massively Parallel Computing for Scientific and Engineering Applications" R. Glowinski (France) / University of Houston / INRIA "Fictitious Domain Methods for Partial Differential Equations" J. Killough (USA) / University of Houston / Elf-Aquitaine, Pau "Improving Recovery from Hydrocarbon Reservoirs through High Performance Computing" J. Lenfant (France) / IRISA / Universit{ de Rennes "Parallel Memory Organization for High-Speed Computers" G. Meurant (France) / CEA, Centre d'Etudes de Limeil-Valenton "The Future of Scientific Computing on Parallel Computers" R. Moulic (USA) / IBM T.J. Watson Research Center, Yorktown Heights "Highly Parallel Machines" SESSIONS A) ARCHITECTURES, PARALLEL ALGORITHMS AND COMPILERS 1) Architectures 2) Algorithms and Languages 3) Compilers 4) Performance Analysis 5) Distributed Computing on Workstation Network B) NUMERICAL METHODS FOR SUPERCOMPUTERS 6) Vector/Parallel Algebraic Solvers 7) Numerical Discretization I 8) Numerical Discretization II 9) Numerical Discretization III 10) Stability and Reliability C) HIGH PERFORMANCE COMPUTING APPLICATIONS 11) Computational Fluid Dynamics I 12) Computational Physics and Chemistry 13) Computational Fluid Dynamics II 14) Transport Phenomena 15) Emerging Fields SYMPOSIUM SECRETARIAT For complete information about the conference, including contributed program and registration information, please contact: Anne Lefevre CNUSC - SHPC 91 950 Rue de Saint Priest - B.P. 7229 34184 MONTPELLIER CEDEX 4, FRANCE Tel : (+33) 67-14-14-14 Fax : (+33) 67-52-37-63 E-mail : SHPC@FRMOP11.Bitnet ------------------------------ From: Danny Hershkowitz Date: Fri, 07 Jun 91 09:05:31 IST Subject: Guidelines for The Hans Schneider Prize In May 1991, Hans Schneider, The ILAS President, has announced the Hans Schneider Prize in Linear Algebra. The Guidelines Committee for the prize, consisting of Danny Hershkowitz and Roger Horn, has prepared the enclosed draft of guidelines for the prize. We would appreciate your comments and suggestions concerning these guidelines. Please make those by e-mail to Danny Hershkowitz ( MAR23AA@TECHNION.BITNET ) or to Roger Horn ( RHORN@JHUVMS.BITNET ) no later than July 10. Sincerely, Danny Hershkowitz Roger Horn THE INTERNATIONAL LINEAR ALGEBRA SOCIETY The Hans Schneider Prize in Linear Algebra GUIDELINES The Hans Schneider Prize in Linear Algebra ("the Prize") is awarded by The International Linear Algebra Society ("ILAS") for research, contributions, and achievements at the highest level of Linear Algebra. The Prize may be awarded for an outstanding scientific achievement or for lifetime contribution. AWARD DATE AND PERIOD: The Prize is awarded every three years at an appropriate ILAS conference, as decided upon by the ILAS Executive Board. In any year in which a Prize is awarded, there may be more than one recipient, within the discretion of the ILAS Executive Board. ELIGIBILITY: Aside from specific guidelines developed by the Prize Committee, there shall be no restrictions on who may receive the Prize, including without limitation, restrictions with respect to sex, race, national origin, age, or the time since the recipient took his or her last academic degree. PROCEDURE: A Prize Committee shall make specific recommendations to the ILAS Executive Board about the choice of recipients. However, recipients shall actually be chosen by the ILAS Executive Board. The ILAS Executive Board may decide on the preferred nature of the Prize each time it is to be awarded, and instruct the Prize Committee to make its recommendations accordingly. The Prize Committee shall consist of five members who are appointed by the ILAS President upon the advice of the ILAS Executive Board, and the ILAS President as an ex-officio member. The appointments shall be made at least nine months in advance of the Prize award date. The term of office shall be from the date of appointment until the date of the Prize award. The committee shall solicit nominations for the Prize from the general membership of ILAS, as well as from other members of the scientific community. The ILAS President shall appoint a replacement for any Prize Committee member who is nominated for the Prize and does not remove his/her name from consideration. The Prize Committee shall notify the ILAS President of its selection at least three months prior to the award date. The notification must be accompanied by a written justification, as well as a citation that can be used for a certificate and read at award time. The ILAS Executive Board may accept, reject, or change the nomination at least three months prior to the award date. NOTIFICATION OF AWARD: The ILAS President shall notify the recipient(s) of the Prize at least two months in advance of the award date. An invitation shall also be extended to the recipient(s) to attend the award ceremony to receive the Prize and to present a talk. THE PRIZE PRESENTATION: The ILAS President shall announce the Prize at the chosen conference and present the Prize to the recipient(s) that are present. The recipient(s) is not required to be present to receive the Prize. An announcement of the Prize recipient(s) shall appear in ILAS' printed and electronic media. DESCRIPTION OF THE PRIZE: The Prize consists of a plaque and a certificate containing the citation. The ILAS Executive Board may decide to grant the Prize recipient(s) also a cash award and/or to cover all or some of the expenses of the Prize recipient(s) in attending the award ceremony. THE PRIZE FUND: The Prize fund consists of a gift of $10,000.00 given to ILAS by Professor Hans Schneider. Other donors may make gifts to the fund. Such gifts shall be added to the principal. The principal amount of the fund has been invested, and earned interest on the principal is used to fund the Prize. ------------------------------ End of NA Digest ************************** -------