Subject: NA Digest, V. 92, # 40 NA Digest Sunday, October 25, 1992 Volume 92 : Issue 40 Today's Editor: Cleve Moler The MathWorks, Inc. moler@mathworks.com Today's Topics: 2-D Surface Fitting Manchester Centre for Computational Mathematics University of Kent Reports Available via FTP SCAN-93 Symposium in Vienna Parallel CFD '93 in Paris Computer Systems and Applied Math Workshop on the Reliability of Computations Position at Virgina Polytechnic Institute Position at Iowa State University Wilkinson Fellowship in Scientific Computing Contents: Computing Contents: SIAM Applied Math 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: Viviane Pierrard Date: Tue, 20 Oct 92 11:35:35 MET Subject: 2-D Surface Fitting Software and algorithms wanted to find best estimate analytical expressions to approximate the function: z=f(x,y). We know z(i) at 500 grid points x(i), y(i), not evenly distributed. Automatic test of different types of fit functions approximating f(x,y); automatic selection of the best estimate. Who can help me find such software? PIERRARD Viviane INSTITUT D'AERONOMIE SPATIALE DE BELGIQUE (Belgian Institute for Space Aeronomy) Avenue Circulaire 3 B-1180 Uccle Belgium phone: +32-2-374.81.21 (switchboard) fax: +32-2-374.84.23 +32-2-373.04.17 telex: 21563 email via unix or EARN (BITNET) : viviane@aero.oma.be ------------------------------ From: Nick Higham Date: Wed, 21 Oct 92 09:42:17 BST Subject: Manchester Centre for Computational Mathematics The numerical analysis groups at the University of Manchester (`the Victoria University of Manchester') and at UMIST (the University of Manchester Institute of Science and Technology) recently joined together to form the Manchester Centre for Computational Mathematics (MCCM). The members of this centre are Professor C.T.H. Baker (Director) Dr R.W. Thatcher (Associate Director) Dr T.L. Freeman Dr G. Hall Dr N.J. Higham Dr D.J. Silvester Dr Y-S. Smyrlis. Dr R.M. Thomas Professor J. Walsh Dr J. Williams Affiliated with the group are members of the Computer Science Department (in particular from the Centre for Novel Computing, Director Professor J. Gurd) and members of the Applied Mathematics group (headed by Professor P. Hall) in the Department of Mathematics, both of the Faculty of Science. The possibility of other individuals and groups forming this type of affiliation also exists. The staff co-operate at various levels, including the provision of an M.Sc. course and postgraduate research supervision. The interests of the numerical analysts cover - sequential and parallel algorithms, - numerical linear algebra, - approximation of functions data, - numerical integration, - numerical solution of initial-value and boundary-value problems in ordinary differential equations, algebraic and delay-differential equations, - parameter fitting, - location of zeros of functions, - optimisation, - integral and partial-differential equations, - industrial applications. ------------------------------ From: T. R. Hopkins Date: Wed, 21 Oct 92 11:52:16 +0100 Subject: University of Kent Reports Available via FTP An electronic archive of internal reports from the University of Kent's Computing Laboratory is now available via anonymous ftp from unix.hensa.ac.uk (129.12.21.7). All the reports are in compressed PostScript form and reside in the directory misc/ukc.reports/comp.sci/reports; an index giving authors and titles is available in misc/ukc.reports/comp.sci/index. These reports include updated versions of the cumulative indexes to the ACM and Applied Statistics algorithms (reports 24-92 and 25-92). The bibliographic databases used to generate these indexes are in the directory misc/netlib/bib (acm.dbase and as.dbase), along with Bibtex versions (acm.bib and as.bib) and a Perl script for manipulating the basic database format (bibop.sh). unix.hensa.ac.uk is a general unix-based software archive for the UK and currently contains the uunet, netlib and statlib archives. It is accessible via anonymous ftp, electronic mail and an interactive browsing system; for further details e-mail archive@unix.hensa.ac.uk the message send info/hensa.unix.general ------------------------------ From: H.J. Stetter Date: Fri, 16 Oct 92 18:01:00 +0100 Subject: SCAN-93 Symposium in Vienna First Announcement of S C A N - 9 3 International Symposium on Scientific Computing, Computer Arithmetic and Validated Numerics V i e n n a (Tech. University) 26 (Sunday) - 29 September 1993 This conference continues the series of SCAN-xx Symposia which have previously been held at Karlsruhe, Basel, Albena(Bulgaria), and Oldenburg, under the joint sponsorship of IMACS and GAMM. These conferences have traditionally treated the numerical and algorithmic aspects of Scientific Computing, with an emphasis on the algorithmic validation of results and on arithmetic tools for that purpose. Contributions relating to the use of parallel architectures will be particularly welcome. Organizing Chairman: Hans J. Stetter, TU Vienna Scientific Committee: G.Alefeld, Karlsruhe; G.Corliss, Milwaukee; A.Frommer, Wuppertal; J.Herzberger, Oldenburg; S.Markov, Sofia; D.Matula, Dallas; A.Neumaier, Freiburg; S.Rump, Hamburg; H.J.Stetter, Vienna. Organizing Committee: W.Auzinger, J.Schneid, G.Schranz-Kirlinger, H.J.Stetter. Extended abstracts will be due by the end of April 93. Outstanding submissions will be selected for presentation as highlighted talks. For more information early in 1993, please, submit your name, affiliation, and e-mail address to scan-93@uranus.tuwien.ac.at or to Prof. Hans J. Stetter TU Vienna (115.2) A-1040 Vienna AUSTRIA ------------------------------ From: Pierre Leca Date: Mon, 19 Oct 92 17:27:48 GMT Subject: Parallel CFD '93 in Paris PARALLEL CFD'93 Implementations and Results Using Parallel Computers Paris - France May 10-12, 1993 CALL FOR PAPERS The organizing committee is pleased to announce the PARALLEL CFD international conference adressing development in the use of parallel supercomputers in computational fluid dynamics and multidisciplinary applications. This conference will be held in Paris (France) with the help of the GAMNI-SMAI and IMA organizations in association with CNRS. Organizing Committee : A. Ecer, Purdue University; L. Fezoui INRIA; A. Geiger RUS Stuttgart; J. Hauser, Technical College of Braunschweig; D. Keyes Yale University; E. Krause RWTH Aachen; P. Leca, ONERA (Co-Chair); A. Lin Pennsylvania University; K. Morgan IMA; R. Pelz, Rutgers University; J. Periaux, Dassault- Aviation (Co-Chair); H. Simon, NASA-Ame s/CSC Advisory Board : R. Agarwall McDonnel Douglas; R. Blech NASA-Lewis; A.Dervieux INRIA; Ch. De la Foye DRET; T.A. Elgof United Technologies; D. Emerson SERC; R. Hirsh NSF; J.P. Ferrier CNRS; K. Hessenius NASA-Headquarters; L. Long Penn State University; G. Lonsdale GMD; D. R. Mc. Carthy Boeing; Y. Morchoisne ONERA; O. Pironneau Paris 6 University; B. Richards Glasgow University; Sakell AFOSR; M. Salas Nasa-Langley; V. Saxena IBM; P. Schiano CIRA; W. Schmidt MBB; D. Scott Intel; J. Richardson TMC; M. Walker CRAY Research ABSTRACT DEADLINE : January 15, 1993 Proposed title and 2-3 pages extended abstract should be sent to : Europe and outside USA USA P. Leca Pat Fox ONERA Purdue University 29 Av. de la Division Leclerc School of Engineering and Technology 92320 Chatillon FRANCE 799 W. Michigan Street Indianapolis Indiana 46202-5160 USA Tel : (33) 1 46 73 43 74 Tel : 1 (317) 274 0806 Fax : (33) 1 46 73 41 50 Fax : 1 (317) 274 4567 E-mail : leca@onera.fr E-mail : fox@cimvax.et.iupui.edu ------------------------------ From: Ralph B Kearfott Date: Tue, 20 Oct 92 08:58:43 CDT Subject: Computer Systems and Applied Math INTERNATIONAL CONGRESS ON COMPUTER SYSTEMS AND APPLIED MATHEMATICS 19-23 JULY 1993 ST. PETERSBURG, RUSSIA Organized by Center of Modern Communications, University of St. Petersburg THE AIMS of the Congress are to provide an interdisciplinary forum for the exchange of ideas between Eastern and Western scientists and to bring to practicing researchers recent advances and the state of the art in all areas of computer science, scientific computing, software engineering, applied and computational mathematics. The official language of the Congress is English and only papers submitted in English will be considered. THE TOPICS highlighted by the Congress include, but are not limited to: Programming Languages; Numerical Analysis; Differential Equations; Inverse Problems; Fluid Dynamics; Quantum and Statistical Mechanics; Applied Probability and Statistics; Theory of Computing; Scientific Computation; Parallel Processing; Supercomputing; Optimization and Operations Research; Software Engineering and Compiler Construction; Symbolic Computation; CASE Tools; Fuzzy Systems; Databases; Networks; Neural Nets; Artificial Intelligence; Expert Systems; Computer Graphics; Computer Vision and Image Processing; Data Security; Simulation and Modelling; Electromagnetics and Semiconductors; Medicine and Biology; Mathematical Education; Dynamical Systems; Economics and Management; Environmental Science; Manufacturing Systems; Material Science; MINISYMPOSIA PROPOSAL: The Program Committee invites you, as a potential organizer, to submit a proposal for a minisymposium. A minisymposium is a session of 3-6 speakers focusing on a single topic. The organizers should submit the title(s) of the session(s) they propose to the Program Committee as soon as possible. Minisymposium organizers are responsible for the scientific quality of papers in their sessions, consequently all papers invited by organizers are automatically accepted. CONTRIBUTED PAPERS/POSTER PRESENTATIONS: The program will also include contributed paper sessions (20 - minute presentation), posters, and industrial exhibits. Authors are invited to submit to the CSAM'93 Program Committee a one page abstract and indicate if they prefer an oral or poster session. Authors may suggest the title(s) of appropriate session(s) for their paper. Manuscripts of papers presented at the Congress will be published as CSAM'93 Proceedings after the Congress. A volume containing all abstract of the accepted papers and description of all minisymposia including titles and speakers known by May 1, 1993, will be available to the participants at the Congress. Late papers and sessions, if accepted, may be presented at the Congress and will be listed in the Supplementum to the final program. DEADLINES: Minisymposium proposals: As soon as possible; Early submissions due: February 1, 1993; Normal submissions due: May 1, 1993; Late submissions: After May 1, 1993. EXHIBITOR INFORMATION: Booths and tables will be available to companies wishing to display their products and/or services. Send inquires for further information, proposals for minisymposia, and two copies of the abstract to: Dr. Sergey S. Voitenko Director, Center of Modern Communications, University of St. Petersburg 14th Line 29 199178 St. Petersburg Russia e-mail: serge@spfac.lgu.spb.su Outside of Ex-USSR and Eastern Europe proposals for minisymposia and ------------------------------ From: Valerie Fraysse Date: Thu, 22 Oct 92 10:11:15 GMT Subject: Workshop on the Reliability of Computations CERFACS INRIA Centre Europ\'een Institut National de Recherche et de de Recherche Formation Avanc\'ee et de en Informatique en Calcul Scientifique et Automatisme First Announcement WORKSHOP ON RELIABILITY OF COMPUTATIONS New trends in the assessment of quality for numerical linear algebra software and algebraic processes. March 30--31, April 1 1993, TOULOUSE (FRANCE) For an engineer or a researcher, having confidence in the results obtained from large-scale computational codes and the robustness of the underlying models is of the utmost importance. Indeed, the widespread availability of supercomputers has replaced physical experimentation by intensive numerical simulations, even for problems at the edge of instability. Unfortunately, tools for obtaining information on the quality and the reliability of computer results are rarely used in industrial environments. However, there exist some new tools, developed in the framework of linear algebra, which can offer the best possible solution to a given problem. One has to discover and learn how to use them. The aim of the workshop ``RELIABILITY OF COMPUTATIONS'' is then twofold : * to present an overview of the new concepts influencing the design of LAPACK, the Linear Algebra Library released in 1992, * to show how the user can get meaningful information even from results where all the digits can be wrong. Such computational problems are considered so difficult that they are called ``impossible''. List of sollicited lecturers M. Arioli, IAN--CNR Pavia and CERFACS I. Babu\v{s}ka, University of Maryland J. C. Berg\`es,arily ne CNES J. P. Boujot, CISI Ing\'enierie T. Braconnier, CERFACS F. Chatelin, THOMSON--CSF and CERFACS J. Cullum, IBM Yorktown V. Frayss\'e, CERFACS S. Hammarling, NAG N. Higham, University of Manchester B. K{\aa}gstr\"{o}m, University of Ume\aa Organizing Committee: M. Arioli, IAN--CNR Pavia and CERFACS F. Chatelin, THOMSON--CSF and CERFACS, I. S. Duff, Rutherford Appleton Laboratory and CERFACS, V. Frayss\'e, CERFACS. This workshop is organized by CERFACS with the support of INRIA and IBM. Scientific coordination : CERFACS Val\'erie Frayss\'e Tel : (33) 61 19 30 18 42 ave. G. Coriolis Fax : (33) 61 19 30 00 31057 Toulouse CEDEX Email : fraysse@cerfacs.fr FRANCE ------------------------------ From: Janet Peterson Date: Mon, 19 Oct 92 16:47 EDT Subject: Position at Virgina Polytechnic Institute Virginia Polytechnic Institute and State University Department of Mathematics The Department of Mathematics at Virginia Polytechnic Institute and State University is seeking qualified applicants for an anticipated tenure-track position at the Assistant Professor level in the area of Computational Mathematics/Numerical Analysis. We seek applicants with a strong research potential as well as the ability to be an effective teacher. A vita, a brief description of research interests, three letters of recommendation including at least one which addresses teaching, and any supporting materials should be sent to Janet S. Peterson, Chair, Computational Mathematics Search Committee ICAM--Wright House--0531 Virginia Tech, Blacksburg, VA 24061-0123. Applications will be accepted for as long as there is a possibility of making an appointment or until March 15,1993; however, applications completed by January 1, 1993 will be included in the first round of evaluations. Virginia Tech is an Equal Opportunity/Affirmative Action Employer. The University takes its affirmative action mission seriously and is especially interested in receiving applications from women and people of color. ------------------------------ From: Fritz Keinert Date: Mon, 19 Oct 92 10:58:57 CDT Subject: Position at Iowa State University Subject to budgetary approval, the Department of Mathematics of Iowa State University will hire a tenure-track assistant professor or associate professor in numerical analysis, starting in August 1993. The position will be full time during the 9-month academic year. The successful candidate should have a Ph. D. or equivalent and should have a strong interest in teaching at both the graduate and undergraduate level. He or she should maintain an active research program in some branch of numerical analysis. The candidate will be expected to apply for externally funded grants. Senior candidates should have a strong record of publications and grants. Start-up funds for a workstation will be available. The salary will be commensurate with qualifications. Iowa State University is an Affirmative Action/Equal Opportunity Employer. Women and minorities are especially encouraged to apply. The department will begin screening applications January 15, 1993; applications will be accepted, however, until the positions are filled. Applications (vita, description of research plans, and three letters of recommendation) should be sent to Stephen J. Willson, Chair, Department of Mathematics, Iowa State University, Ames, Iowa 50011. Inquiries may be directed to the head of the hiring committee, Jim Cornette (cornette@iastate.edu). ------------------------------ From: Jorge More Date: Fri, 23 Oct 92 10:01:02 CDT Subject: Wilkinson Fellowship in Scientific Computing WILKINSON FELLOWSHIP IN SCIENTIFIC COMPUTING Mathematics and Computer Science Division Argonne National Laboratory Argonne National Laboratory invites outstanding candidates to apply for the 1993 J. H. Wilkinson Fellowship in Scientific Computing. This fellowship was created in memory of Dr. James Hardy Wilkinson, F.R.S., who had a close association with the Mathematics and Computer Science Division as a consultant and guiding spirit for the EISPACK and LINPACK projects. The Wilkinson Fellowship is supported by a special grant from the Applied Mathematical Sciences program of the U.S. Department of Energy. The Wilkinson Fellowship is intended to encourage young scientists actively engaged in state-of-the-art research in scientific computing. The candidate must be a U.S. citizen or permanent resident, and must have earned (or be about to earn) a Ph.D. degree during the past three years. The appointment will be in the Mathematics and Computer Science Division, which has strong research programs in scientific computing, software tools, computational mathematics, and applied analysis. There is special interest in numerical methods for linear algebra, optimization, and partial differential equations; software tools for parallel computing; and state-of-the-art numerical methods for computational science problems. The appointment is for one year, and may be renewed for a second year. The benefits of the appointment include a highly competitive salary, moving expenses, a generous professional travel allowance, and access to high-performance scientific workstations, a scientific visualization laboratory, and state-of-the-art parallel computers (including the Intel Touchstone DELTA). Applications from qualified candidates should be addressed to Nancy Griparis, Employment and Placement, Box J-MCS93, 9700 South Cass Avenue, Argonne National Laboratory, Argonne, IL 60439-4832. Applications should include a resume', a statement of research goals, and the names of three references. The closing date for applications is January 22, 1993. The applications will be reviewed by a selection committee and a candidate announced in March 1993. The position will commence during 1993. Further inquiries can be made by calling Jorge J. More' at 708-972-7162 or by sending electronic mail to more@mcs.anl.gov. Argonne is an affirmative action/equal opportunity employer. ------------------------------ From: H.J. Stetter Date: Fri, 16 Oct 92 18:00:39 +0100 Subject: Contents: Computing Contents: Commputing Volume 49, Fasc.1 (August 92) Y.Ding and M.A.Weiss Best Case Lower Bounds for Heapsort H.Blum, S.Lisky, and R.Rannacher A Domain Splitting Algorithm for Parabolic Problems M.Plum Numerical Existence Proofs and Explicit Bounds for Solutions of Nonlinear Elliptic Boundary Value Problems A.E.Kastner-Maresch The Implicit Midpoint Rule Applied to Discontinuous Differential Equations A.Frommer and G. Mayer On the Theory and Practice of Multisplitting Methods in Parallel Computation Z.Xu and X.Shi A Comparison of Point and Ball Iterations in the Contractive Mapping Case X.Chen and T.Yamamoto On the Convergence of some Quasi-Newton Methods for Nonlinear Equations with Nondifferentiable Operators ------------------------------ From: SIAM Date: Tue, 20 Oct 92 11:21:49 EST Subject: Contents: SIAM Applied Math SIAM J. Appl. Math. Vol. 53, No. 1, February 1993 Stability of Coexisting Phases for Compressible van der Waals Fluids David Hoff and M. Khodja Pseudospectra of the Orr--Sommerfield Operator Satish C. Reddy, Peter H. Schmid, and Dan S. Hennington Subsonic Potential Flow and the Transonic Controversy A. J. Guttman and C. J. Thompson Second-Kind Integral Equation Formulation for the Slow Motion of Arbitrary Shape Near a Plane Wall in a Viscous Fluid Henry Power and B. Febres de Power Chaotic and Resonant Streamlines in the ABC Flow Xiao-Hua Zhao, Keng-Huat Kwek, Ji-Bin Li, and Ke-Lei Huang Bifurcation Analysis of Cellular Interfaces in Unidirectional Solidification of a Dilute Binary Mixture M. D. Impey. D. S. Riley, and A. A. Wheeler On the G-Closure in the Polycrystalline Problem V. Nesi Two-Front Travelling Waves in Filtration Combustion K. G. Shkadinsky, G. V. Shkadinskaya, B. J. Matkowsky, and V. A. Volpert On the Density of Traction Traces in Scattering of Elastic Waves George Dassios and Zafiria Rigou Solution of Convolution Integral Equations by the Method of Differential Inversion R. G. Hohlfeld, J. I. F. King, T. W. Drueding, and G. v. H. Sandri Mathematical Modeling of Semiconductor Lasers Xinfu Chen, Avner Friedman, and Li-Shang Jiang Modeling and Analysis of Laser-Beam-Induced Current Images in Semiconductors Stavros Busenberg, Weifu Fang, and Kazufumi Ito The Owl's Odyssey: A Continuous Model for the Dispersal of Territorial Species Joseph E. Carroll and Roland H. Lamberson Should a Park be an Island? Robert Stephen Cantrell and Chris Cosner Self-Sustained Firing in Populations of Integrate-and-Fire Neurons Carl Vanvreeswijk and L. F. Abbott Mode Localization in a Class of Multidegree-of-Freedom Nonlinear Systems with Cyclic Symmetry Alexander F. Vakakis and Cetin Cetinkaya Lypunov Exponent and Rotation Number of Two-Dimensional Linear Stochastic Systems with Telegraphic Noise Kenneth A. Loparo and Xiangbo Feng Exponential Limiting Distributions in Queuing Systems with Deadlines M. Drmota and U. Schmid ------------------------------ End of NA Digest **************************