Subject: NA Digest, V. 95, # 21 NA Digest Sunday, May 21, 1995 Volume 95 : Issue 21 Today's Editor: Cleve Moler The MathWorks, Inc. moler@mathworks.com Today's Topics: Honorary Doctorate for Gene Golub at Umea University Scientific Computing Web Pages How to Find the Biggest Eigenvalues of Large Matrices Eigenvalues and -vectors of a Real 3x3 Matrix Seeking Copy of Ascher, Mattheij and Russell Book Software for Orthogonal Polynomials Problems with Email for Book on Iterative Methods New Book on Conjugate Gradients Software for 3-D Fluid Interfaces Available FTP, WWW, Gopher from University of Regensburg Nominations for George Polya Prize Conference on Computer Methods and Water Resources Workshop on Neural Networks and Neurocontrol Conference in Hungary on Computational Mechanics Workshop on Computational Electromagnetics Conference to Honor Thomas Kailath Fellowship at University of Bologna Postdoctoral Position at Rice University Research Assistantship at the University of Salford Postdoctoral Positions at University of Groningen Contents, Linear Algebra and its Applications Contents, International Journal of Computational Fluid Dynamics Submissions for NA Digest: Mail to na.digest@na-net.ornl.gov. Information about NA-NET: Mail to na.help@na-net.ornl.gov. URL for the World Wide Web: http://www.netlib.org/na-net/na_home.html ------------------------------------------------------- From: Bo Kagstrom Date: Mon, 15 May 95 14:32:39 +0200 Subject: Honorary Doctorage for Gene Golub at Umea University Dear NA-net community, The faculty of Mathematics and Natural Sciences has decided to appoint Stanford University's Fletcher Jones Professor Gene H. Golub a honorary doctorate (Doctor of Philosophy) at Umea University. We all know Gene's magnificent scientific contributions to our area and he very much deserves all the marks of distinction he has received over the years. Gene has had close relations with Umea for 25 years. He first visited Umea 1970 and has since then been a very welcome guest both at a personal and professional level during his regular visits. The official appointment will take place September 15-16, 1995 during the celebration of the 30th Anniversary of Umea University. Gene will present a talk on September 15. Most of September 16 is devoted to "festivities". We welcome all Gene's friends to Umea for this very special event. Bo Kagstrom and Per-Ake Wedin Email: bokg@cs.umu.se ------------------------------ From: Gene Golub Date: Mon, 15 May 95 23:29:12 PDT Subject: Scientific Computing Web Pages After talking to many students, I have the impression that it is hard for students to know where there are graduate programs in Scientific Computing and Applied Mathematics. If you have such a program and if you have a page on the WEB that is accessible, please send me a note and I will make a page available which will allow students (and others) to get a better perspective on our subject. Thanks. Gene ------------------------------ From: Basil Benjamin (B.Benjamin@unisa.edu.au) Date: Tue, 16 May 1995 14:47:45 +1030 Subject: How to Find the Biggest Eigenvalues of Large Matrices I am interested in knowing what are thought to be the "best" methods for finding the n eigenvalues of maximum modulus of a matrix of order N. Take n=20 and N=1e3, 1e4, 1e5 (if the answer varies with these sizes) Presumably the answer will change if the matrix is: 1. real and symmetric 2. real and nonsymmetric 3. complex. If anyone has comments on any of these cases, I would be very pleased to hear. B.R.Benjamin, School of Maths, University of South Australia. Fax +61 8 302 3381 ------------------------------ From: Daniel A. Asimov Date: Wed, 17 May 1995 14:35:46 -0700 Subject: Eigenvalues and -vectors of a Real 3x3 Matrix What do the experts think is the most efficient and numerically stable algorithm for finding the eigenvalues and -vectors of a real (non-symmetric) 3 x 3 matrix ? I am wondering if there is something to be gained in using an algorithm that's tailored to 3 x 3 matrices, instead of using the same algorithms that are deemed stellar for n x n matrices. (In case it's relevant, I'll mention that the matrix entries tend to be neither exceptionally small nor exceptionally large; they may be thought of as selected independently from a standard normal distribution.) Recommendations of appropriate canned routines are certainly welcome. For the eigenvalue calculation, I am also interested in hearing the pros and cons of using the formula (Cardano's) for the roots of a cubic polynomial, which is mathematically satisfying and fairly fast, since it's a formula -- but which may or may not be numerically stable. Thanks in advance for your suggestions. Dan Asimov Senior Computer Scientist Mail Stop T27A-1 NASA Ames Research Center Moffett Field, CA 94035-1000 asimov@nas.nasa.gov (415) 604-4799 w (415) 604-3957 fax ------------------------------ From: SIAM Date: Thu, 18 May 95 14:36:09 EST Subject: Seeking Copy of Ascher, Mattheij and Russell Book SIAM will be reprinting Numerical Solution of Boundary Value Problems for Ordinary Differential Equations, by Uri M. Ascher, Robert M.M. Mattheij, and Robert D. Russell in our Classics in Applied Mathematics Series. We are looking for someone who has a copy of the book and who would like to donate it to SIAM--we will have to cut and paste pages. In exchange, SIAM will give two complimentary copies of the new edition. Please contact Vickie Kearn, Publisher, SIAM, 3600 University City Science Center, Philadelphia, PA 19104-2688; e-mail: kearn@siam.org. Thank you very much. Vickie Kearn Publisher, SIAM ------------------------------ From: Daniele Funaro Date: Thu, 18 May 95 11:11:11 ITA Subject: Software for Orthogonal Polynomials Time ago I wrote a list of about 80 FORTRAN subroutines with the aim of creating a short library for spectral methods based on algebraic orthogonal polynomials (Jacobi, Chebyshev, Legendre, Laguerre and Hermite). These routines allow basic operations such as: determination of zeroes and weights of Gauss quadratures, change of basis (from Fourier coefficients to point-values and viceversa), evaluation of derivatives and norms, etc. They may be used to initialize FORTRAN codes using spectral methods in view of more sophisticated applications, but they are also suited for beginners. I recently decided to make this software available to everybody. The access on-line to the documentation can be made by anonymous ftp on: ftp.ian.pv.cnr.it in the directory /pub/splib There you find a compressed version of the FORTRAN source: splib_source.f.Z the manual in postscript (about 180 pages): sp_man.ps.Z and a short version of the manual just containing the index: index_of_sp_man.ps.Z The subroutines have been checked many times, however they may be always subjected to human mistakes and rounding errors. I will gladly accept suggestions and improvements. Daniele Funaro University of Pavia, Italy Via Abbiategrasso 209, 27100 Pavia ------------------------------ From: Are Magnus Bruaset Date: Tue, 16 May 1995 08:50:16 +0200 Subject: Problems with Email for Book on Iterative Methods In the previous issue of NA-DIGEST (95:20) I announced the availability of my book "A Survey of Preconditioned Iterative Methods", published by Longman. In this announcement I also gave an email address for the Longman publishing company. Unfortunately, as several of you have already experienced, this email address is very unstable at the moment due to technical problems. To overcome the incovenience this may have caused, I just want to tell that the Web page http://www.oslo.sintef.no/avd/33/3340/presurv will give an alternative email address that can be used until the official address is in working condition again. Best regards Are Magnus Bruaset SINTEF Applied Mathematics Oslo, Norway ------------------------------ From: Martin Hanke Date: Mon, 15 May 1995 10:00:16 +0200 (MET DST) Subject: New Book on Conjugate Gradients Announcement of a new book: CONJUGATE GRADIENT TYPE METHODS FOR ILL-POSED PROBLEMS Martin Hanke (Universitat Karlsruhe, Germany) Publisher: Pitman Research Notes in Mathematics Longman Scientific & Technical Longman House Harlow, Essex CM20 2JE UK Prize: UK pounds 23 About the book: The conjugate gradient method is a powerful tool for the iterative solution of selfadjoint operator equations in Hilbert space. This volume summarizes and extends the developments of the past decade concerning the applicability of the conjugate gradient method (and some of its variants) to ill-posed problems and their regularization. This Research Note presents a unifying analysis of an entire family of conjugate gradient type methods. Most of the results are as yet unpublished, or obscured in the Russian literature. Beginning with original results by Nemirovskii and others for minimal residual type methods, equally sharp convergence results are then derived for the classical Hestenes-Stiefel algorithm. In the final chapter some of these results are extended to selfadjoint indefinite operator equations. The main tool for the analysis is the connection of conjugate gradient type methods to real orthogonal polynomials, and elementary properties of these polynomials. These prerequisites are provided in a first chapter. Applications to image reconstruction and inverse heat transfer problems are pointed out, and exemplarily numerical results are shown for these applications. ------------------------------ From: Xiaolin Li Date: Mon, 15 May 1995 10:29:12 +0500 Subject: Software for 3-D Fluid Interfaces Available Software for simulating the 3-D fluid interface instabilities in compressible fluids (Rayleigh-Taylor and Richymyer-Meshkov instabilities) is available to those who are interested in applying it to scieitific problems. This code uses a resolution enhanced numerical scheme for contact surface, that is, the second order TVD with artificial compression (TVD/AC). The fluid contact interface is traced through the level set method. The code has both the seriel and parallel modes and can be run in parallel and distributed system such as the iPSC-860 and the PVM. The output features the triangulated surface which can be viewed by using the geomview software package. For detail and to obtain this code, please send email to: xlli@silver.ucs.indiana.edu ------------------------------ From: Herbert Homeier Date: Mon, 15 May 95 20:16:43 +0200 Subject: FTP, WWW, Gopher from University of Regensburg The combined WWW/gopher/ftp server at rchs1.uni-regensburg.de (IP 132.199.48.1) now provides Preprints, Technical Reports, and Theses in the fields Computational Chemistry, Scientific Computing, and Numerical Analysis. WWW: http://rchs1.uni-regensburg.de:80/preprint.html ftp://rchs1.chemie.uni-regensburg.de/pub/preprint gopher://rchs1.chemie.uni-regensburg.de:70/11./pub/preprint gopher: gopher rchs1.uni-regensburg.de --> 8. Data files (= /pub ) --> 45. preprint ftp: ftp rchs1.uni-regensburg.de Name(...) : anonymous Password: cd /pub/preprint Dr. Herbert H. H. Homeier Institut fuer Physikalische und Theoretische Chemie Universitaet Regensburg D-93040 Regensburg, Germany Phone: +49-941-943 4720 FAX : +49-941-943 2305 email: na.hhomeier@na-net.ornl.gov HOMEPAGE ------------------------------ From: Donna Blackmore Date: Tue, 16 May 95 16:06:48 EST Subject: Nominations for George Polya Prize CALL FOR NOMINATIONS for GEORGE POLYA PRIZE The Polya Prize SIAM will present the award at the 1996 SIAM Annual Meeting in Kansas City, Missouri, July 22-26. The award honors the memory of George Polya and will be given for a notable application of combinatorial theory. Eligibility There are no restrictions except that the prize is broadly intended to recognize specific work. Description of the Award The award will consist of an engraved medal and a $20,000 cash prize. Nominations A letter of nomination, including a description of the achievement(s), should be sent by July 1, 1995, to: Dr. Paul Seymour Chair, Polya Prize Selection Committee Bell Communications Research 435 South Street Morristown, NJ 07960 Supporting letters, or names of knowledgeable persons from whom such letters might be solicited, are also welcome. ------------------------------ From: Roger Ghanem Date: Wed, 17 May 1995 11:20:34 -0400 Subject: Conference on Computer Methods and Water Resources Please be advised the dates for the Third International Conference for Computer Methods and Water Resources, initially set for August 1995, have been moved to September 25-28 1995. Thank you Roger Ghanem ------------------------------ From: Francisco Caviedes Date: Wed, 17 May 1995 21:23:12 +0600 Subject: Workshop on Neural Networks and Neurocontrol THE INTERNATIONAL WORKSHOP ON NEURAL NETWORKS AND NEUROCONTROL SEPTEMBER 5-10 QUINTANA ROO, MEXICO 1995 CALL FOR PAPERS The Organizing Committee invites all persons interested in fuzzy sets, evolutionary programming, and neural networks applied to the engineering fields related to control systems, to submit papers for presentation at the conference. All papers accepted for presentation will be published in the conference proceedings. To ensure a high-quality conference and proceedings, all paper submissions will be reviewed for technical merit and content by three senior researchers in the field. Authors are requested to submit a letter of intent, the information sheet (that includes full name (s) of the author(s), title, address, phone/fax numbers, e-mail address), and an abstract (up to 250 words) no later than May 25, 1995. TOPICS OF INTEREST Architecture ANN Paradigms, Associative Memories, Hybrid Systems Learning Gradient-Based Learning, Stochastic Learning, Adaptive Methods, Supervised Learning, Reinforcement Learning Systems Analysis Time Series, Signal Processing, Systems Modeling, Systems Identification, Process Monitoring, Fuzzy Models Control & Design Optimization, Neurocontrol, Adaptive Control, Learning Control, Fuzzy Control, Intelligent Control Authors should forward the letter of intent, information sheet, and abstract to: Prof. Benito Fernandez-Rodriguez Mechanical Engineering Department, ETC 5.160, MC C2200 The University of Texas at Austin, Austin, TX 78712-1063 Phone/Fax: (512) 471-7852-7682 E-mail: benito@NERDLab.me.utexas.edu or Dr. Nydia Lara-Zavala Centro de Instrumentos, Laboratorio de Neurocomputaci=F3n=20 UNAM, Apdo. Postal 70-186 M=E9xico, 04510, D.F. Phone: (525) 652 5920 Fax: (525) 550 0357 E-mail: nydia@aleph.cinstrum.unam.mx or caviedes@servidor.unam.mx ------------------------------ From: Gyorgy Szeidl Date: Thu, 18 May 1995 08:44:00 +0100 Subject: Conference in Hungary on Computational Mechanics FIRST ANNOUNCEMENT AND CALL FOR PAPERS NUMERICAL METHODS AND COMPUTATIONAL MECHANICS IN SCIENCE AND ENGINEERING 15-19th July 1996 Miskolc, Hungary Organized by Central European Association for Computational Mechanics Janos Bolyai Mathematical Sociaty Hungarian Acadamy of Sciences University of Miskolc This conference is a satellite conference prior to the 2nd European Congress of Mathematics to be held in Budapest, July 21-27, 1996. The aim of the conference is to bring together numerical analysts, specialists of computational mechanics and software developers. The conference will focus on numerical methods used in mechanical and other engineering applications. Special attention will be given to the finite element method and related techniques. FIELDS OF PRIMARY INTEREST -- Numerical algebra (sparse and dense linear systems, eigenvalue problems, nonlinear systems, parallel algorithms, etc.) -- Numerical solution of differential equations (FEM, BEM, multigrid, difference methods, spectral methods, parallel algorithms, etc.) -- Computational mechanics (FEM, BEM, parallel algorithms etc) INTERNATONAL SCIENCE COMMITTEE I. BABUSKA, chairman; University of Maryland B. SZABO, co-chairman; Washington University in St. Louis B. GUO, The University of Manitoba, Winnipeg, Canada R. HABER, University of Illinois at Urbana-Champaign, USA V.P. IL'IN, Computing Center, Russian Academy of Sciences, Novosibirsk, Russia C. JOHNSON, Chalmers University of Technology, Sweden M. KRIZEK, Czech Academy of Sciences, Prague J.T. ODEN, The University of Texas, USA J. PITKARANTA, Helsinki University of Technology, Finland L.S. XANTHIS, University of Westminster, London, UK J.R. WHITEMAN, Brunel University, U.K. M.F. WHEELER, Rice University Houston, USA T. CZIBERE, University of Miskolc, Hungary Z. GASPAR, Technical University of Budapest, Hungary I. PACZELT, University of Miskolc, Hungary P. ROZSA, Technical University of Budapest, Hungary G. STOYAN, Eotvos Lorand University of Budapest, Hungary PLENARY SPEAKERS INCLUDE I. Babuska, B. Szabo, R. Haber, V.P. Il'in, M. Krizek, L.S. Xanthis, W.L. Wendland, Zs. Gaspar, P. Rozsa, G. Stoyan SUGGESTIONS RECEIVED FOR MINISYMPOSIA Finite element methods for parabolic and hyperbolic problems, Computational methods for optimization of engineering systems, Linear algebra, Boundary element method CALL FOR PAPERS Authors who wish to present a 20-minute contributed lecture should submit a one-page abstract in English and LATEX format with article 12pt style. Page size is A4. Authors are kindly asked to submit their abstracts via e-mail. Deadline: 30th of January, 1996. If you are interested in attending the conference and wish to be on the mailing list, please SEND NOW, a message to A.GALANTAI or Gy.SZEIDL Institute of Mathematics or Department of Mechanics University of Miskolc 3515 Miskolc-Egyetemvaros Hungary The whole text of the First Announcement will have been sent to persons on our mailing list as of the middle of July. Phone: 36-46-365111 Fax: 36-46-365174 e-mail: matnum@gold.uni-miskolc.hu (preferred) matgal@gold.uni-miskolc.hu mechszgy@gold.uni-miskolc.hu ------------------------------ From: Roy Nicolaides Date: Thu, 18 May 1995 15:09:16 -0400 (EDT) Subject: Workshop on Computational Electromagnetics WORKSHOP ANNOUNCEMENT ICASE/LaRC is hosting a COMPUTATIONAL ELECTROMAGNETICS workshop which will take place from June 12 through June 16 1995. The purpose of the workshop is to bring together leading researchers from academia, industry and government to exchange ideas and information on topics of current interest in computational electromagnetics. The workshop consists of invited presentations and discussions and is open to all interested researchers and practitioners. The invited talks include: P. Petropoulos (SMU) A higher order finite difference scheme for the time dependent Maxwell's equations in materials with memory B. McCartin (GMI) Guided wave computation via the control region approximation V. Oliker (Emory) On Monge-Ampere equations arising in synthesis of reflector antennas J-F. Lee (WPI) Vector finite elements; perfectly matched absorbing boundary conditions M. Deshpande (NASA) Integral equation methods to solve electromagnetic scattering and radiation problems R. Shore (USAF/Phillips) Incremental length diffraction coefficients for the shadow boundaries of circular and parabolic cylinders Z. Cendes (Ansoft Corp/CMU) Spurious modes; absorbing boundary conditions; CAD interfaces A. Taflove (Northwestern) Advances in finite difference time domain simulation of electromagnetic wave phenomena R. Nicolaides (CMU) Unstructured mesh approximations for Maxwell's equations with applications to radar cross sections U. Kangro (CMU) Spurious electric and magnetic offset fields in electromagnetic scattering: cause and cures. R. Reddy (NASA) Hybrid finite element and moments methods for electromagnetic scattering and radiation from complex structures P. Monk (Delaware) Higher order finite elements on cuboid meshes T. Abboud (EP,France) Integral equation techniques for relatively high frequency electromagnetic scattering For additional information please contact ICASE at (804) 864-2174 or Roy Nicolaides at nic+@cmu.edu. ------------------------------ From: Christine K. Lincke Date: Fri, 19 May 95 16:40:09 -0700 Subject: Conference to Honor Thomas Kailath International Conference on COMMUNICATIONS, COMPUTING, CONTROL and SIGNAL PROCESSING to honor the contributions of Professor Thomas Kailath June 22-26, 1995 Stanford University, Stanford, CA, USA The traditional systems disciplines of communications, computation, control and signal processing are becoming increasingly important in addressing major technological challenges of the coming century, in fields such as materials processing, highway automation, and ubiquitous personal communications, among many others. Moreover the boundaries between these separate disciplines are rapidly being blurred by the many demands of these applications. This conference will highlight several of these recent trends and results, presented by leading scientists and engineers from around the world. Invited speakers include: N. Abramson, B. Anderson, K. Astrom, B. Atal, A. Bruckstein, S. Boyd, J. Cioffi, T. Cover, B. De Moor, P. Dewilde, T. Durrani, C. Foias, D. Forney, R. Gallager, M. Gevers, I. Gohberg, G. Golub, H. Kimura, P. Kokotovic, S.Y. Kung, R-W. Liu, L. Ljung, D. Mayne, S. Meerkov, D. Messershmitt, S.K. Mitter, A. Netravali, B. Ottersten, A. Paulraj, E. Robinson, V. Roychowdhury, R. Schafer, G. Verghese, N. Viswanadham, A. Viterbi, J. Willems, G. Xu, L. Zadeh, For further information, fax: 415-723-8473 or e-mail: chris@isl.stanford.edu ------------------------------ From: Giorgio Turchetti Date: Fri, 19 May 1995 14:06:15 +0200 (WET-DST) Subject: Fellowship at University of Bologna EC HUMAN CAPITAL AND MOBILITY NONLINEAR PROBLEMS IN BEAM DYNAMICS AND TRANSPORT Reasearch Assistantships The European Commission has provided funding to support research in nonlinear effects in beam dynamics. The network consists of the following institutions: Dipartimento di Fisica, Universit\`a di Bologna - ITALY Department of Mathematics, University of Patras - GREECE LNL Laboratori Nazionali INFN, Legnaro - ITALY ENEA Laboratori di Frascati - ITALY GSI Darmstadt - GERMANY DESY Hamburg - GERMANY CERN Geneva - SWITZERLAND Faculdad de Ciencias Fisicas, Universidad Complutense, Madrid - SPAIN Three fellowships are available at CERN-Bologna, DESY and GSI respectively for the period of one year. Applications are invited from citizens of all EC member states. Fellowship reserved to EC citizens excluding italians. Working sites : University of Bologna and CERN (Geneva). Reasearch topics: beam diffusion induced by ripples in the power supply. Fellowship reserved to EC citizens excluding germans. Working site: GSI (Darmstadt). Research topics: effect of noise in the beam stability. Fellowship reserved to EC citizens excluding germans. Working site DESY (Hamburg). Research topics: nonlinearities of a magnetic lattice and collective phenomena. The appointment is for one year starting 1st october 1995. Mobility within the network for short periods will be allowed. Gross salary will be 2000 ECU per month. Applicants should have a PhD in Physics, preferably concerning nonlinear dynamics and its applications to particle accelerators. Candidates not having yet obtained the PhD, will be considered with lower priority; exceptionally the fellowship could be attributed, but with a lower salary to be negotiated. Closing date for applications is 30th of August, 1995 The applications with a full C.V. and letters by two referees with complete addresses should be addressed to Prof. G.Turchetti, Dipartimento di Fisica, Universit\`a di Bologna. Via Irnerio 46, 40126 Bologna, ITALY FAX 39.51.247244; E-MAIL Turchetti@bologna.infn.it ------------------------------ From: Dan Sorensen Date: Fri, 19 May 95 12:52:23 CDT Subject: Postdoctoral Position at Rice University Postdoctoral Position at Rice University: The Numerical Linear Algebra Project within the Center for Research on Parallel Computation has a postdoctoral position in software and algorithm development for large scale algebraic eigenvalue problems. The applicant should have a Ph.D. and be knowledgeable in the areas of parallel programming, numerical software development, numerical linear algebra, Krylov subspace projection methods. In addition to a research interest in this area, it is crucial that the applicant be a good writer and speaker and have an interest in modern software design and implementation. The position will be under the direction of Dan Sorensen and will be a research appointment in the Department of Computational and Applied Mathematics at Rice University in Houston, Texas. Contact Dan Sorensen, sorensen@rice.edu, immediately if you are interested in at least one year in this position. ------------------------------ From: S. Amini Date: 15 May 95 9:41 Subject: Research Assistantship at the University of Salford EPSRC Funded Research Assistantship at the University of Salford The Mathematics committee of the Engineering and Physical Sciences Research Council has awarded us a postdoctoral research assistantship to commence on or soon after 1st October 1995 for a period of up to 3 years. The project title is ''Analysis of Boundary Integral Equations for a Class of Inhomogeneous and Nonlinear PDEs'' The project will be supervised jointly by Dr S Amini of the University of Salford and Dr Chen Ke of the University of Liverpool. The successful candidate will be based at Salford but regular bi-monthly meetings are planned at Liverpool. CANDIDATE: should possess or be about to obtain a PhD in a related field. The starting salary is in the region of 15000 pounds p.a. on the RA1A scale. OUTLINE OF THE PROJECT: The Boundary integral methods provide an effective technique for the solution of a large class of linear partial differential equations. For an important class of inhomogeneous and nonlinear problems, applications of classical boundary integral methods are no longer effective, due to the presence of domain integrals. Promising methods such as the dual reciprocity technique for obtaining boundary only integral equations have been attempted by the engineering community. The project is concerned with the analysis of these generalised boundary integral equation methods based on approximation of the source terms by radial basis functions. The resulting integral equations are to be discretised using wavelet functions. We start by investigating two model problems, the Helmholtz and the diffusion equations, before extending the analysis to the more general equations. For further details please contact: Dr S Amini Department of Mathematics & Computer Science University of Salford Salford M5 4WT. UK. Tel: (0044) 0161- 745 5353 (Direct) Fax: (0044) 0161- 745 5559 email: S.Amini@mcs.salford.ac.uk ------------------------------ From: F. W. Wubs Date: Thu, 18 May 1995 13:42:45 +0200 Subject: Postdoctoral Positions at University of Groningen The Center for Large-Scale Scientific Computing (LSSC) of the University of Groningen (RUG) offers: 2 POST-DOCTORAL FELLOWSHIPS for a period of 9-12 months each. These fellowships are provided through the Human Capital and Mobility Host Institute Program of the European Commission. The Center for LSSC is part of the Faculty of Mathematics and Natural Sciences. The Center is specialized in the design and application of simulation methods requiring huge amounts of computer power (high-performance computing). A broad research area is covered, ranging from molecular chemistry, through fluid mechanics and astrophysics, upto computer vision and computational neuroscience. The University of Groningen possesses a most modern infrastructure for high-performance computing, consisting of workstations, minisupers (Convex C240), i860 multiprocessor systems, massively parallel supercomputers (Thinking Machines CM-5; Cray J932) and visualization tools. We are looking for candidates who can play a role in the central theme of high-performance computing, i.e. the development and implementation of numerical algorithms on parallel computers. Therefore, candidates should hold a PhD degree in one of the areas of high-performance computing, or should acquire this degree in the very near future. Candidates must have a firm background in numerical analysis and parallel computing. Experience in developing iterative methods for solving the large sparse matrices which arise in various applications (such as CFD) will be highly appreciated. The candidates are expected to deliver support to the high-performance computing community at RUG, and to make a contribution to the educational curriculum on parallel computing. According to the EU rules, to be eligible candidates must be a national of a Member State of the European Union or an associated state or be resident in the Community. Applicants may not possess Dutch nationality or have carried out their normal activity in The Netherlands for more than two years prior to the date of submission of their application. Applications should contain an extended curriculum vitae showing the candidate's experience in high-performance computing. It should include a list of publications and an abstract of the candidate's PhD thesis (1-2 pages). Applications should be sent before June 15, 1995 to: prof.dr. A.E.P. Veldman Department of Mathematics University of Groningen P.O. Box 800 NL-9700 AV Groningen The Netherlands e-mail: veldman@math.rug.nl fax: +31 50 633976 > From the received applications, the Center for LSSC as the host institute will make a pre-selection. The final selection of the candidates will be made by the European Commission. For further inquiries you can contact prof. Veldman at the address above. ------------------------------ From: Richard Brualdi Date: Wed, 17 May 1995 17:54:01 -0500 (CDT) Subject: Contents, Linear Algebra and its Applications LINEAR ALGEBRA AND ITS APPLICATIONS Contents Volume 220 Special Issue: Proceedings of the Workshop ``Nonnegative Matrices, Applications and Generalizations'' and the Eighth Haifa Matrix Theory Conference Richard A. Brualdi (Madison, Wisconsin) > From the Editor-in-Chief 1 Preface 7 Lars-Erik Andersson (Linkoping, Sweden), Gengzhe Chang (Hefei, Anhui, China), and Tommy Elfving (Linkoping, Sweden) Criteria for Copositive Matrices Using Simplices and Barycentric Coordinates 9 I. Baragana (San Sebastian, Spain) and I. Zaballa (Vitoria-Gasteiz, Spain) Block Similarity Invariants of Restrictions to (A, B)-Invariant Subspaces 31 Ilan Bar-On (Haifa, Israel) and Bruno Codenotti (Pisa, Italy) A Fast and Stable Parallel QR Algorithm for Symmetric Tridiagonal Matrices 63 Alberto Borobia (Madrid, Spain) Matrices Which Are Extreme Points of the Generalized Transitive Tournament Polytope 97 Dragomir Z. D@B-okovic (Waterloo, Ontario, Canada) Cosets of Centralizers in the General Linear Group Contain Regular Elements 111 B. Curtis Eaves (Stanford, California), Uriel G. Rothblum (Haifa, Israel), and Hans Schneider (Madison, Wisconsin) Perron-Frobenius Theory Over Real Closed Fields and Fractional Power Series Expansions 123 L. Elsner (Bielefeld, Germany) The Generalized Spectral-Radius Theorem: An Analytic-Geometric Proof 151 L. Elsner (Bielefeld, Germany) and S. Friedland (Chicago, Illinois) Singular Values, Doubly Stochastic Matrices, and Applications 161 Miroslav Fiedler (Prague, Czech Republic) Numerical Range of Matrices and Levinger's Theorem 171 Stephen J. Kirkland (Regina, Saskatchewan, Canada) and Michael Neumann (Storrs, Connecticut) Group Inverses of M-Matrices Associated With Nonnegative Matrices Having Few Eigenvalues 181 Mark Krupnik (Haifa, Israel) Geometric Multiplicities of Completions of Partial Triangular Matrices 215 George M. Lady (Philadelphia, Pennsylvania), Thomas J. Lundy (Victoria, British Columbia, Canada), and John Maybee (Boulder, Colorado) Nearly Sign-Nonsingular Matrices 229 P. Lancaster (Calgary, Alberta, Canada) and L. Rodman (Williamsburg, Virginia) Minimal Symmetric Factorizations of Symmetric Real and Complex Rational Matrix Functions 249 Yu. Lyubich (Haifa, Israel) Perron-Frobenius Theory for Finite-Dimensional Spaces With a Hyperbolic Cone 283 Rosa Amelia Martins (Aveiro, Portugal) and Joao Filipe Queiro (Coimbra, Portugal) Spectral Inequalities for Generalized Rayleigh Quotients 311 J. J. McDonald (Regina, Saskatchewan, Canada), M. Neumann (Storrs, Connecticut), H. Schneider (Madison, Wisconsin), and M. J. Tsatsomeros (Regina, Saskatchewan, Canada) Inverse M-Matrix Inequalities and Generalized Ultrametric Matrices 321 J. P. Milaszeqicz (Buenos Aires, Argentina) Comparison Theorems for Monotone Newton-Fourier Iterations and Applications in Functional Elimination 343 B. Mond (Bundoora, Victoria, Australia) and J. E. Pecaric (Zagreb, Croatia) Reverse Forms of a Convex Matrix Inequality 359 Reinhard Nabben (Bielefeld, Germany) and Richard S. Varga (Kent, Ohio) Generalized Ultrametric Matrices-a Class of Inverse M-Matrices 365 Ronald J. Stern and J. J. Ye (Montreal, Quebec, Canada) Variational Analysis of an Extended Eigenvalue Problem 391 Robert C. Thompson (Santa Barbara, California) Root Spreads for Polynomials and Hermitian Matrix Pencils 419 Referees, Volumes 201-220 435 Author Index, Volumes 201-220 441 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ LINEAR ALGEBRA AND ITS APPLICATIONS Contents Volume 221 Charles Kenney (Santa Barbara, California) and Gary Hewer (China Lake, California) Trace Norm Bounds for Stable Lyapunov Operators 1 Jie-Tai Yu (Notre Dame, Indiana) On Relations Between Jacobians and Minimal Polynomials 19 Werner Kratz (Ulm, Germany) Characterization of Strong Observability and Construction of an Observer 31 H. Narayanan (Bombay, India) A Rounding Technique for the Polymatroid Membership Problem 41 M. Niezgoda and Z. Otachel (Lublin, Poland) Differentiable Transformations Preserving a Cone Preordering 59 Philip A. Knight (Glasgow, United Kingdom) Fast Rectangular Matrix Multiplication and QR Decomposition 69 Carl H. FitzGerald (La Jolla, California), Charles A. Micchelli (Yorktown Heights, New York), and Allan Pinkus (Haifa, Israel) Functions That Preserve Families of Positive Semidefinite Matrices 83 Li Jiong-Sheng (Hefei, Anhui, People's Republic of China) Eigenvalues of Oriented-Graph Matrices 103 Andrew J. Lazarus (Berkeley, California) Eigenvectors of Circulant Matrices of Prime Dimension 111 Li Luoluo (Guangzhou, People's Republic of China) Sufficient Conditions for the Solvability of an Algebraic Inverse Eigenvalue Program 117 Shao Jia-yu (Shanghai, People's Republic of China) On the Largest kth Eigenvalues of Trees 131 Zhi-Hao Cao (Shanghai, People's Republic of China) On Convergence of Nested Stationary Iterative Methods 159 LeRoy B. Beasley (Logan, Utah), Stephen J. Kirkland (Regina, Saskatchewan, Canada), and Bryan L. Shader (Laramie, Wyoming) Rank Comparisons 171 J. M. Pena (Zaragoza, Spain) M-Matrices Whose Inverses Are Totally Positive 189 Steve Kirkland (Regina, Saskatchewan, Canada) and Robert E. Hartwig (Raleigh, North Carolina) A Convexity Result for Complex Numbers With Applications to Nonnegative Normal Matrices 195 S. Jondrup (Copenhagen, Denmark) Automorphisms and Derivations of Upper Triangular Matrix Rings 205 Juan M. Gracia and Francisco E. Velasco (Vitoria-Gasteiz, Spain) Stability of Invariant Subspaces of Regular Matrix Pencils 219 R. D. Grigorieff and R. Plato (Berlin, Germany) On a Minimax Equality for Seminorms 227 Kazuo Toraichi (Tsukuba, Ibaraki, Japan) and Masaru Kamada (Hitachi, Ibaraki, Japan) Knot Positions for the Smoothest Periodic Quadratic Spline Interpolation of Equispaced Data 245 George Labahn (Waterloo, Ontario, Canada), Bernhard Beckermann (Villeneuve d Ascq, France), and Stan Cabay (Edmonton, Alberta, Canada) Inversion of Mosaic Hankel Matrices via Matrix Polynomial Systems 253 Author Index 281 ------------------------------ From: Grant Guevremont Date: Fri, 19 May 1995 15:03:20 -0400 Subject: Contents, International Journal of Computational Fluid Dynamics Contents INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS Vol. 4, No. 1-2, 1995 Least Squares Finite Element Solutions for Three-Dimensional Backward-Facing Step Flow B.-N. Jiang, L.-J. Hou, T.-L. Lin and L. A. Povinelli An Efficient Least-Squares Finite Element Method for Incompressible Flows and Transport Processes L. Q. Tang and T. T. H. Tsang Finite Element Modelling of the Incompressible Navier-Stokes Equations T. Utnes and G. Ren Analysis of Combustion Processes in a Gun Interior Ballistics T. W. H. Sheu and S.-M. Lee An Explicit FEM for 3-D Viscous Incompressible Flows with an EBE/PCG Iterative Algorithm U. Gulcat On the Influence of the Choice of Transport and Chemical Models for Non-Equilibrium Hypersonic Flow Simulations M. L. Sawley and S. Wuthrich Parallel Computation of the 2-D Navier-Stokes Flowfield of a Pitching Airfoil A. Cui and D. D. Knight The Behavior of Some Solution Acceleration Techniques in CFD J. O. Hager and K. D. Lee Steady Stratified Circulation Induced by Constant Coastal Wind C.-W. Kong, R. R. J. Hwang and R. Y. Yang ------------------------------ End of NA Digest ************************** -------