Subject: NA Digest, V. 96, # 14 NA Digest Sunday, April 7, 1996 Volume 96 : Issue 14 Today's Editor: Cleve Moler The MathWorks, Inc. moler@mathworks.com Today's Topics: Query: Finding All Relative Maxima Condition of Random Matrices Fast ODE solvers Request for Papers on Optimization Software to Accompany Nagle and Saff ODE Book New Book on Visualization and Optimization Conference on Virtual Systems and Multimedia Computational Finance Workshop Conference on Theoretical and Computational Acoustics High Performance Computing in Europe on IBM Platforms Workshop Paralleles und Verteiltes Rechnen Southern Ontario NA-Day '96 Theme Issue of the Arabian Journal for Science & Engineering Postdoctoral Position at Cornell Medical School Positions at Chalmers University of Technology, Gothenburg Contents, IMA Numerical Analysis Contents, IMACS Applied Numerical Mathematics Contents, Linear Algebra and its 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. URL for the World Wide Web: http://www.netlib.org/na-net/na_home.html ------------------------------------------------------- From: John Tucker Date: Mon, 01 Apr 96 11:21:00 EST Subject: Query: Finding All Relative Maxima This naive query originates from a remark made by a chemist that it would be of considerable value to him to be able to determine ALL the relative maxima, not just the global maximum, for a given objective function of several variables (arising, I believe, in super-computer modeling of molecular dynamics). Being removed from what is now state-of-the-art in optimization, I ask for information: does there exist theory and software that (under suitable conditions, naturally) provides an efficient means to accomplish this? Please email responses to jtucker@nas.edu. Thank you in advance for any replies. John R. Tucker Director Board on Mathematical Sciences Room NAS 315 National Academy of Sciences 2101 Constitution Avenue, N.W. Washington, D. C. 20418 (202) 334-2421 Fax: (202) 334-1597 E-mail: JTUCKER@NAS.EDU ------------------------------ From: Indraneel Das Date: Mon, 1 Apr 1996 11:27:56 -0600 (CST) Subject: Condition of Random Matrices Consider a random nxn real, matrix A such that: 1. A(i,i) is distributed normally with mean 1 and variance sigma^2 for i = 1, ... , n 2. A(i,j) is distributed normally with mean mu and variance sigma^2 (same sigma as above) for all i not equal to j Find the probability that A has rcond < r_crit, where say, r_crit = 1e-10 when a.> mu (mean of each off-diagonal elt) = 0 b.> mu = 1 . [ You can fix a value of the variance if that simplifies things] -- Indraneel Das [ Graduate Student ] Department of Computational and Applied Mathematics Rice University Houston, TX 77251 -1892 Ph. (713) 527 8101 x3810 e-mail: indra@rice.edu ------------------------------ From: Saleet Jafri Date: Tue, 2 Apr 1996 10:54:22 -0500 Subject: Fast ODE solvers I am working on large coupled systems of ODE's and am looking for a fast solver. I decompose my grid into pieces and solve the ODE system on the subgrids. The application is cardiac network models. Any suggestions would be appriciated. Thanks Saleet Jafri Department of Biomedical Engineering The Johns Hopkins University School of Medicine Rm 411 Traylor Research Building 720 Rutland Ave Baltimore, MD 21205 410-550-5091 jafri@bme.jhu.edu ------------------------------ From: Hairer Ernst Date: Tue, 2 Apr 1996 10:17:39 +0200 Subject: Request for Papers on Optimization My former student Valerie Brasey, Red Cross delegate in Tuzla/Bosnia, sent me the following letter from one of her field officers: ... we work on a similar areas: on research field of optimization. She refers me to you, hoping that you could help University Tuzla Your aid can be reflected in books from area of my interest: techniques of optimization and simulation and that include the follows: 1. Where is it possible to get those books 2. if it was possible to obtain some reprints from that area 3. if it is possible to abtain some programme packages for PC from that area Thank You in advance for Your reply, I send You best regards. Sincerely Yours, Mr. Suad Halilcevic, dipl. el. ing. Fakultet Elektrotehnike Masinstva Univerzitet u Tuzla Bosnia and Herzegovina If you are doing research on optimization, Mr. Suad Halilcevic would be very grateful, if you send him some of your papers and/or information on excellent recent books and programs. Thanks in advance for all of your help. Ernst Hairer ------------------------------ From: E. B. Saff Date: Tue, 2 Apr 1996 17:22:11 -0500 Subject: Software to Accompany Nagle and Saff ODE Book A differential equations instructional utility package (DOS based) to accompany the text "Fundamentals of Differential Equations" by Nagle and Saff (Addison-Wesley Pub) is now available via the ftp site ftp://ftp.aw.com/math/authors/saff/software The software was developed by E. Moskona, S. Tashev and K. Ivanov. ------------------------------ From: Chris Jones Date: Thu, 4 Apr 1996 08:22:49 -0800 (PST) Subject: New Book on Visualization and Optimization I am pleased to announce the publication of my book, Visualization and Optimization, published by Kluwer Academic Publishers, ISBN0-7923-9672-3. The illustrated book discusses how techniques from computer graphics can be usefully applied to optimization practice and research; it also discusses how optimization has been applied to visualization itself. I have negotiated a limited time, 25% discount with the publisher. This discount is available by using an order form published on the Web. This order form is available at URL: http://weber.u.washington.edu/~cvj/order.html Cheers, Chris Jones Associate Professor Management Science Department School of Business Administration 353 Mackenzie Hall University of Washington Seattle, WA 98195 http://weber.u.washington.edu/~cvj cvj@u.washington.edu 206-543-9131 206-685-9392 (fax) ------------------------------ From: Takeo Ojika Date: Mon, 01 Apr 1996 12:55:35 +0900 Subject: Conference on Virtual Systems and Multimedia International Conference on Virtual Systems and Multimedia '96 (VSMM '96) in Gifu September 18-20, 1996 Gifu Convention Center, Gifu, Japan The second International Conference on Virtual Systems and Multimedia will be held in Gifu on 18-20 September 1996. This conference is organized by the International Society on Virtual Systems and Multimedia(VSMM), and Executive Committee VSMM'96 in Gifu. The theme of VSMM'96 is advanced technologies for seamless systems between virtual worlds and the real world. The conference will provide a forum for virtual reality and multimedia, and for academic researchers to exchange up-to-date technological knowledge and experience. In addition to the technical sessions, there will be plenary and invited sessions. Papers describing original work in, but not limited to, the following technical areas are invited: HUMAN INTERFACE SENSING INTELLIGENT SYSTEM AND ROBOTICS MEDICAL AND APPLICATION MODELING AND THEORY INVITED SPEKERS: Prof. Takeo Kanade, CMU., USA Prof. Hiroshi Harashima , Univ. of Tokyo Dr. Myron Krueger, Artificial Reality Corp., USA, Prof. Peifa Jia, Univ. of Tsinghua, R.P.China, Prof. Robert J. Stone, InSys Limited(VR Division)&Univ. Salford, UK, Prof. Hal Thwaites, Concordia Univ., Canada, Prof. David Zeltzer, MIT,USA For more details, please e-mail to vsmm-sec@info.gifu-u.ac.jp ------------------------------ From: Ken Jackson Date: Mon, 1 Apr 1996 16:55:48 -0500 Subject: Computational Finance Workshop Computational Finance Workshop Thursday, May 2, 1996 Sandford Fleming Bldg., Room 1105 10 King's College Rd. University of Toronto Sponsored by: ITRC - Information Technology Research Centre IIPR - Institute of Insurance and Pension Research The Departments of Computer Science at the Universities of Waterloo and Toronto Organizers: Peter Forsyth, Computer Science, University of Waterloo Ken Jackson, Computer Science, University of Toronto Modern models in finance rarely admit analytical solutions. This workshop will focus on computational methods for obtaining approximate solutions to financial models with application to such areas as: option pricing, portfolio selection, and risk management. Ten speakers from banks, consulting companies, software companies and universities will present their work on new models and numerical methods, including schemes based on Monte Carlo, Lattices, and Partial Differential Equations. The workshop is intended to increase awareness of advances in computational finance and to discover opportunities to improve practices or undertake further research. There is no registration fee, but we would appreciate receiving your registration before April 26. Agenda Prof. Phelim P Boyle, School of Accounting, University of Waterloo, "New Methods in Monte Carlo" Prof. Ken Vetzal, School of Accounting, University of Waterloo, "PDE Models of the Term Structure: Matching Yield and Volatility Curves" Mr. Baoyan Ding, Combinatorics and Optimization, University of Waterloo, "Portfolio Selection with Skewness" Dr. Michel Crouhy, Vice President, CIBC, Global Analytics, Market Risk Management Division, "An Overview of Numerical Problems in Derivative Products and Risk Management" Mr. Rob Zvan, Computer Science Dept., University of Waterloo, "Robust Numerical Methods for PDE Models of Asian Options" Dr. Izzy Nelken, Consultant and Principal, Harris Investment Management, Chicago, "Modeling Convertible Bonds" Mr. Yidong Liu, Computer Science Dept., University of Toronto, "Modeling Path Dependent Options" Dr. Ron Dembo, Algorithmics Inc., Toronto, Title: TBA Prof. Sheldon Lin, Statistics Dept., University of Toronto, "Bounds on Multiple Contingent Claims" Mr. Hailiang Yang, Statistics Dept., University of Waterloo, "Asset Allocation with Transaction Costs" More information: Rosanna Reid, email rosanna@itrc.on.ca or fax: 416-978-7207 ------------------------------ From: Geza Seriani Date: Tue, 2 Apr 1996 13:34:48 +0200 (METDST) Subject: Conference on Theoretical and Computational Acoustics CALL FOR PAPERS: 3RD. INT. CONF. on THEOR. & COMP. ACOUSTICS (ICTCA) PLACE & DATE: Columbia University, New York, USA, July 14-18, 1997. CONFERENCE COMMITTEE: Prof. Yih-Hsing Pao (National Taiwan University, R.O.C.) Prof. Allan D. Pierce (Boston University, USA) Prof. Martin H. Schultz (Yale University, USA) Prof. Er-Chang Shang (University of Colorado, USA) Dr. Yu-Chiung Teng (Columbia University, USA) SPONSORS: U.S.Naval Undersea Warfare Center (NUWC), NATO SACLANT (Undersea Research Center, ITALY), Yale University, Columbia University, Boston University, University of Colorado, National Taiwan University (REPUBLIC OF CHINA), Osservatorio Geofisco Sperimentale (OGS, Trieste, ITALY). OBJECTIVES: Multidisciplinary forum for researchers in theoretical and computational acoustics and related topics, such as: - Computational aero-, seismo-, and ocean-acoustics; hydroacoustics, bio-engineering acoustics, nonlinear acoustics, structural acoustics; - Multidimensional wave modeling: grid methods (spectral,FD,FEM,FV,BIE,etc), ray & symbolic & ODE methods, supercomputing & parallel methods; - Wave propagation in boreholes, rocks, fluid-solid interfaces, anisotropic media, viscoelastic, porous, fractured & random media; - Ultrasonic wave propagation and nondestructive testing; - Computational and experimental seismology; - Shallow water acoustics and environmental/bottom parameter extraction; - Global acoustics and large-scale monitoring; - Acoustic tomography and full-field inversion; - Real applications, experimental results, and data compression. ABSTRACT DEADLINE: DECEMBER 1, 1996 ADDRESS & INFO: Dr. Yu-Chiung Teng, Aldridge Lab. of Appl. Geophysics, Columbia University, New York, NY 10027 U.S.A. Tel: (212) 854-2910 /Fax: (212) 854-6508 / ------------------------------ From: Anne-Marie De Meyer Date: Thu, 04 Apr 96 11:35:53 UTC+0200 Subject: High Performance Computing in Europe on IBM Platforms SECOND ANNOUNCEMENT SUP'EUR 96 High Performance Computing in Europe on IBM Platforms Krakow, September 8 - 11, 1996 Organizing institutions The 8th annual meeting of SUP'EUR will be held in Krakow, Poland. The Conference is organized jointly by: - Academic Computer Center CYFRONET - KRAKOW, - Institute of Computer Science, AGH, - SUP'EUR Steering Committee. SUP'EUR 96 will focus on the following topics: - Parallel and distributed computing, - IBM trends in high performance computing, - New IBM products, - Experience with SP2, - High performance storage systems, - Environments, languages and tools, - Applications, - Graphics and visualization, - Education and training. The Sup'Prize contest Sup'Prize is a contest (sponsored by IBM) in the development of parallel applications on IBM platforms. The result of the Sup'Prize contest will be presented at the SUP'EUR 96 Conference. You can find more about the Sup'Prize contest from: Anne-Marie De Meyer coordinator of the Sup'Prize 1996 Computing Centre KU Leuven de Croylaan 52A 3001 Leuven Belgium Email: Anne-Marie.DeMeyer@cc.kuleuven.ac.be Fax: 32 16 322999 For more information about SUP'EUR 96 please contact: http://www.cyf-kr.edu.pl/supeur96 ftp: //ftp.cyf-kr.edu.pl/supeur96 email: supeur96@cyf-kr.edu.pl Prof. Jacek Moscinski SUP'EUR Steering Committee Chairman Academic Computer Centre CYFRONET - Krakow P.O.Box 386 Nawojki 11 30-950 Krakow 61 POLAND Phone: (48 12) 341 766; 173 964 Fax: (48 12) 341 084; 338 054 ------------------------------ From: Christian Heimann Date: Thu, 4 Apr 1996 12:11:31 +0100 (MESZ) Subject: Workshop Paralleles und Verteiltes Rechnen CALL FOR PAPERS 4. Workshop "uber Wissenschaftliches Rechnen -- PARALLELES und VERTEILTES RECHNEN -- Termin: In der Woche vom 9.-11.10.1996 Ort : Technische Universit"at Braunschweig Die Kombination preiswerter Rechner mit Bauteilen aus Massenproduktionen "ubersteigt h"aufig die Leistung von Supercomputern, die in teurer Einzelfertigung hergestellt werden. Dies f"uhrte zum Aufschwung von Parallelrechnern und Workstationfarmen mit RISC Prozessoren und erkl"art ihren sprunghaften Anstieg am Marktanteil im High Performance Computing. Verbunden mit dieser Entwicklung sind Fragen zur optimalen Verteilung von Aufgaben auf verschiedene Rechner. Wesentlich ist hierbei die Wechselwirkung zwischen parallelen Algorithmen, dem Netzwerk bzw. der Hardware, und der Kommunikationsart. Ebenso stellt sich die Frage der Organisation dieser Rechner, die als Arbeitsplatzrechner oder dedizierte Produktionsrechner eingesetzt werden k"onnen. Diese Fragen reichen von geeigneten parallelen Algorithmen "uber Batchsysteme, von Fehlertoleranz und Lastbalanzierung in verteilten Systemen bis hin zu Netztechnologien und Vernetzungsfragen. Nur eine ausgewogene Balance der Elemente Algorithmus, Hardware/Netzwerk und Kommunikation wird effektive Ergebnisse zeigen. Dieser Workshop spannt eine Br"ucke zwischen diesen Fragen und verbindet Parallelrechnen, d.h. Softwaretools, Programmiermodelle und Algorithmen f"ur Parallelrechner, mit verteiltem Rechnen, d.h. Tools zur Organisation von Arbeitsplatzrechnen, und dazu notwendiger Netztechnologie. Beitr"age zu folgenden Schwerpunkten sind m"oglich: - Programmiermodelle - Softwaretools - Algorithmen - Organisation, Lastbalanzierung und Fehlertoleranz - Metacomputing - Anwendungen - Kommunikation - neue Netztechnologien. Besonders erw"unscht sind Beitr"age, die sich mit der Wechselwirkung dieser einzelnen Elemente und deren Auswirkung auf die Effektivit"at besch"aftigen. Als Beitr"age sind Voll- und Kurzbeitr"age m"oglich. Die Beitr"age sollten in Deutsch oder Englisch sein. Sie sollten in Papierform oder elektronisch (postscript level 2) an Parallel96@tu-bs.de geschickt werden. Akzeptierte Beitr"age werden in einem Proceedingsband ver"offentlicht. Die Beitr"age sollten in LaTeX mit dem Springer Lecture Notes Style llncs.sty, verf"ugbar via gopher://trick.ntp.springer.de/11/tex/latex/llncs/ geschrieben sein. Die Vollbeitr"age sollten ein Maximum von 12 Seiten und die Kurzbeitr"age einen Umfang von 4 Seiten nicht "uberschreiten. Elektronische Anmeldung: Weitere Informationen finden Sie unter http://www.tu-bs.de/institute/WiR/ Dort k"onnen Sie sich auch elektronisch zur Tagung anmelden und einen Vortrag einreichen. Anmeldung per e-Mail: Senden Sie bitte ihre Antwort per e-Mail an Parallel96@tu-bs.de ------------------------------ From: Robert Corless Date: Thu, 4 Apr 1996 14:25:40 -0500 Subject: Southern Ontario NA-Day '96 1996 SOUTHERN ONTARIO NUMERICAL ANALYSIS DAY SCHEDULE AND ABSTRACTS Saturday, April 27, 1996, 8:30am Room 240, Western Science Centre University of Western Ontario The final schedule for SONAD 96 is given below, along with abstracts for the invited presentations. The abstracts for the graduate student presentations are available on our Web site, http://pineapple.apmaths.uwo.ca/conferences. Please note that one of our invited speakers, George Corliss, will be giving another presentation on the day before the conference. We encourage you to arrive early on Friday so that you can attend George's talk, as well as the wine and cheese reception in the evening. The abstract for this talk is given below. We have had a terrific response regarding the student presentations. As a result, we have filled all the available slots in the schedule. However, we will also be displaying posters of graduate student work outside the conference hall. If you are interested in displaying a poster, please send a title to Rob Corless at rmc@pineapple.apmaths.uwo.ca by April 19. TIMES AND LOCATIONS Presentation: George Corliss, "Operator Overloading as an Enabling Technology for Automatic Differentiation" Friday, April 26, 4:00pm Room 240, Western Science Centre Conference: Saturday, April 27, 8:30am-5:30pm Room 240, Western Science Centre CONFERENCE SPEAKERS Michel Pettigrew, TBA Mohamed Hamed, "Numerical Simulation of Unsteady Thermocapillary Convection with Large Scale Interfacial Deformations" Peter Varlagas, "Anisotropic FEM Mesh Generation Using Rivara Refinement" Sultan Sial, "A Finite Volume Method for Simulating Phase Transitions" Saar Friedman, "Particle Tracking for Multiphase Flow Visualization" Reza Sadri, "Entrance Effects in Channel Flows" Marzban Kermani, "A Preview of Automeshing: Its Status and Future in the Industry" Serge Kruk, "A Semidefinite Approach to Nonlinear Optimization Problems" Robert Zvan, "Robust Numerical Methods for PDE Models of Asian Options" Hiroshi Hayashi, "A Delay Differential Equation Solver by a Continuous Runge-Kutta Method with Defect Control" George Corliss, "War Stories from Industrial Mathematics" ABSTRACTS OF INVITED PRESENTATIONS Operator Overloading as an Enabling Technology for Automatic Differentiation Dr. George Corliss Marquette University Friday, Apr. 26, 4:00pm, Rm 240, Western Science Centre We present an example of the science that is enabled by object-oriented programming techniques. Scientific computation often needs derivatives for solving nonlinear systems such as those arising in many PDE algorithms, optimization, parameter identification, stiff ordinary differential equations, or sensitivity analysis. Automatic differentiation computes derivatives accurately and efficiently by applying the chain rule to each arithmetic operation or elementary function. Operator overloading enables the techniques of either the forward or the reverse mode of automatic differentiation to be applied to real-world scientific problems. We illustrate automatic differentiation with an example drawn from a model of unsaturated flow in a porous medium. The problem arises from planning for the long-term storage of radioactive waste. War Stories from Industrial Mathematics Dr. George Corliss Marquette University In 20+ years of consulting and teaching industrial and applied mathematics, my students and I have been involved in some very interesting, and some very frustrating, projects. We have helped win (and lose) the America's Cup yacht races, navigate commercial airliners, select stock portfolios, prescribe and monitor drug treatment, recover oil, diagnose hypertension, design packing crates for plastic containers, monitor electrocardiogram signals, recommend which day to harvest alfalfa, design a toilet for the German ICE high-speed trains, control the Laudering process in beer brewing, select a fragrance for Pledge, and many others. This talk will discuss some of the more interesting projects, the tools applied, and the lessons learned. The intent is to convey the flavor of the field of practicing industrial mathematics. A central precept is ``Listen to your client'' so that you solve the problem they have, rather than the problem you wish they had. You may apply anything you know, but whatever you know is never enough. A Preview of Automeshing: Its Status and Future in the Industry Dr. Marzban Kermani Cray Research Meshing and pre-processing of geometry data, for the purpose of analysis, has always been a very time-consuming matter. As the confidence level of managers in CAE increases, more people are relying on CAE. However, as more CAE is done and as the models get bigger, the problem of dealing with the geometry becomes significantly larger, to the point that some people decide it does not make economic sense to do a thorough analysis. With faster processors today, it is possible to automate this process and quite a bit of activity both in academia and industry is being focused on this subject. In general, automatic tetra meshing has matured quite a bit and both Delauney and Octree approaches offer almost everything an analyst wants. However in the area of hexahedral meshing, there is more work that needs to be done. A lattice method approach has been developed by Cray Research, which is implemented in a code called Hexar. There are some shortcomings in the approach. If these issues shortcomings are addressed, faster and more reliable CAE can be performed. Some of these issues are discussed in order to encourage curious minds to take up some of these challenges for advancement towards virtual engineering. ------------------------------ From: Basem Attili Date: Wed, 3 Apr 1996 00:05:08 +0300 (SAUST) Subject: Theme Issue of the Arabian Journal for Science & Engineering The editorial board of the Arabian Journal for Science and Engineering (AJSE) plans to publish a theme issue in January of 1998 in Numerical Methods for Differential Equations and Applications. The AJSE hopes to bring together in a single issue research papers which represents the state of the art in this vast and rapidly growing area. AREAS OF INTEREST - Numerical methods for ODEs and for PDEs - Numerical functional analysis of DEs - Numerical methods for linear and nonlinear eigenvalue problems. - Numerical solution of DEs in science and engineering - Computational aspects of numerical methods for DEs PUBLICATION SCHEDULE - Deadline for submission of manuscripts: January 31, 1997 - Notification of acceptance of papers: June 30, 1997 NOTE TO AUTHORS Three copies of manuscripts, including illustrations and references should be submitted to Managing Editor Arabian Journal For Science and Engineering KFUPM Box # 8 King Fahd University of Petroleum and Minerals Dhahran 31261, Saudi Arabia More details may be obtained by contacting the managing editor at the above address, telex 801060 KFUPM SJ, Fax (966-3) 860-3306, e-mail ADMAJSE@SAUPM00 . ------------------------------ From: Yuefan Deng Date: Wed, 3 Apr 96 08:44:12 EST Subject: Postdoctoral Position at Cornell Medical School POSITION OPEN: Postdctoral Position in Supercomputer Simulation of Kidney. INSTITUTION: Cornell University Medical College ADDRESS; Department of Physiology and Biophysics Cornell University Medical College 1300 York Avenue New York, NY 10021 CONTACT PERSON: John L. Stephenson, M.D., Professor of Biomathematics in Physiology PHONE: (212) 746-6376 FAX: (212) 746-8690 EMAIL: john@pip.med.cornell.edu DATE OF AVAILABILITY: Current. Hope to fill position no later than July 1. DESCRIPTION, JOB REQUIREMENTS: The overall goal of our work is to synthesize experimental data at the membrane and molelcular level into predictive mathematical models of the mammalian kidney that are useful in understanding both its normal and diseased function. Depending on species, the mammalian kidney consists of a 50,000 to one million similar but not identical units, the nephrons, operating in parallel. Each nephron is a tube approximately 1 cm long and 10\u-3\d cm in diameter. The closed end is wrapped around a specialized knot of capillaries to form the glomerulus; the open ends merge to empty into the ureter and thence the bladder. A protein and cell free filtrate of blood expressed by the glomerular capillaries is modified as it flows down the nephron by the selective reabsorption of most of the solutes and water and the selective secretion of other solutes to form the final urine needed to maintain the composition of the interstitial fluid bathing the cells of the body within the narrow limits compatible with life. Our current research is directed along two parallel paths: 1) Incorporation of the details of transcellular transport into models of individual tubular segments. 2) Incorporation of the tubular models into architecturally detailed models of single nephrons and of the whole kidney. Simulation of these extended models lends itself naturally to the parallel processing capabilities of supercomputers, and we have ongoing projects at both the Cornell National Supercomputer Facility and at SUNY, Stony Brook. The present position is concerned with the development and coding of the extended models. Requirements for the position are a background in numerical analysis, ability to program in both Fortran and C, and some experience in parallel computation. APPLICATION REQUIREMENTS: Applications, which should include a resume, a statement of research interest, a publication list, and the names of three references should be submitted directly to Professor John L. Stephenson. CORNELL UNIVERSITY MEDICAL COLLEGE IS AN EQUAL OPPORTUNITY/AFFIRMATIVE ACTION EMPLOYER. ------------------------------ From: Dag Wedelin Date: Thu, 4 Apr 1996 12:17:35 +0200 (MET DST) Subject: Positions at Chalmers University of Technology, Gothenburg JOB POSITIONS IN DISCRETE OPTIMIZATION/OPERATIONS RESEARCH The Department of Computing Science, Chalmers University of Technology, Gothenburg, Sweden, offers job positions for work within a three year ESPRIT-project within the HPCN subprogram (High Performance Computing and Networking). The project is a cooperation between Chalmers Univ of Tech, Univ of Patras, Carmen Systems AB and Lufthansa. The project is concerned with developing a new generation of fully automatic scheduling methods, especially for airline crew scheduling. For Chalmers the focus will be on development of the main discrete optimization algorithms. Modelling methods and parallel algoritms will also be investigated. One ASSISTANT PROFESSOR (ref no 47/96). The formal requirement for this postion is a PhD in optimization or other field relevant to the project. The position also involves teaching up to 25%. The position is limited to four years. One RESEARCH ENGINEER (ref no 48/96). The position includes technical development, implementation and some documentation within the project. The formal requirement is a MSc or similar degree in Mathematics or Computing Science. One PHD STUDENT (ref no 49/96). The position is intended for work towards a PhD in an area relevant to the project. Some participation in underaduate education will be required. The formal requirement is a MSc or similar degree in Mathematics or Computing Science. More information can be given by Researcher Dag Wedelin (+46-31-7721022, dag@cs.chalmers.se) or Head of Department Christer Carlsson (+46-31-7721038). Each applicant shall give a short description of his or her qualifications. For the position as Assistant Professor a short description of previous research and teaching experience should also be given. The application should be sent in two copies to the Personnel Office, Chalmers Univ of Tech, S-412 96 Gothenburg, Sweden. The DEADLINE for application is APRIL 19, 1996. ------------------------------ From: Iain Duff Date: Thu, 4 Apr 96 21:57:29 BST Subject: Contents, IMA Numerical Analysis IMA JOURNAL OF NUMERICAL ANALYSIS --- Volume 16, Number 2. Pena J M Pivoting strategies leading to small bounds of the errors for certain linear systems. Dai Y H and Yuan Y Convergence properties of the Fletcher-Reeves method. Bellettini G and Paolini M Numerical simulations of measurements of capillary contact angles. Coleman J P and Ixaru L Gr P-stability and exponential-fitting methods for $y''=f(x,y)$. Schroll H J and Winther R Finite-difference schemes for scalar conservation laws with source terms. Rathsfeld A Error estimates and extrapolation for the numerical solution of Mellin convolution equations. Barrett J W and Blowey J F An error bound for the finite-element approximation of a model for phase separation of a multi-component alloy. Hill A T and S\"uli E Set convergence for discretizations of the attractor. ------------------------------ From: IMACS Administration Date: Wed, 3 Apr 1996 13:58:50 -0500 Subject: Contents, IMACS Applied Numerical Mathematics CONTENTS - IMACS JOURNAL - "APPLIED NUMERICAL MATHEMATICS" VOLUME 19, NUMBER 4, JANUARY 1996 Z. Bai A class of hybrid algebraic multilevel preconditioning methods 389 B. Cano and B. Garcia-Archilla A generalization to variable stepsizes of Stormer methods for second-order differential equations 401 C. de Nicola, G. Pinto and R. Tognaccini A normal mode stability analysis of multiblock algorithms for the solution of fluid-dynamics equations 419 P.M. de Zeeuw Development of semi-coarsening techniques 433 S. Garcia Higher-order incremental unknowns, hierarchical basis, and nonlinear dissipative evolutionary equations 467 C.-H. Guo Incomplete block factorization preconditioning for linear systems arising in the numerical solution of the Helmholtz equation 495 S.V. Tsynkov Errata to "An effective numerical technique for solving a special class of ordinary difference equations". Applied Numerical Mathematics 18 (1995) 489-501 509 ------------------------------ From: Richard Brualdi Date: Thu, 4 Apr 1996 10:52:00 -0600 (CST) Subject: Contents, Linear Algebra and its Applications LINEAR ALGEBRA AND ITS APPLICATIONS Contents Volume 239 Florence Corpet (Castanet-Tolosan, France) and Artibano Micali (Montpellier, France) Algebres Genetiques et Mutation Quantique 1 Chi Fai Chan (Hong Kong) Refinements of the Schur Inequality for Principal Characters 15 Po-Fang Hsieh (Kalamazoo, Michigan), Mitsuhiko Kohno (Kumamoto, Japan), and Yasutaka Sibuya (Minneapolis, Minnesota) Construction of a Fundamental Matrix Solution at a Singular Point of the First Kind by Means of the SN Decomposition of Matrices 29 M. N. Spijker and F. A. J. Straetemans (Leiden, The Netherlands) Stability Estimates for Families of Matrices of Nonuniformly Bounded Order 77 Hannu Valiaho (Helsinki, Finland) P*-Matrices Are Just Sufficient 103 Thomas L. Moeller and Jaime Milstein (El Segundo, California) Algebraic Representations for Finite-State Machines. I. Monoid-Ring Formulation 109 Akio Arimoto and Takashi Ito (Tokyo, Japan) Singularly Positive Definite Sequences and Parametrization of Extreme Points 127 Shu-Lin Liu (Hohhot, People's Republic of China) Bounds for the Greatest Characteristic Root of a Nonnegative Matrix 151 Vladimir Matsaev and Vadim Olshevsky (Ramat Aviv, Israel) Cyclic Dimensions, Kernel Multiplicities, and Gohberg-Kaashoek Numbers 161 Katsutoshi Takahashi (Sapporo, Japan) Eigenvalues of Matrices With Given Block Upper Triangular Part 175 Ismor Fischer (Madison, Wisconsin) and Suk-Geun Hwang (Taegu, Republic of Korea) Certain Nonbarycentric Cohesive Matrices 185 K. R. Fuller (Iowa City, Iowa), W. K. Nicholson (Calgary, Alberta, Canada), and J. F. Watters (Leister, England) Direct Sums of Reflexive Modules 201 Alessandra Giovagnoli (Bologna, Italy) and Henry P. Wynn (Warwick, United Kingdom) Cyclic Majorization and Smoothing Operators 215 Irving S. Reed and Wolfgang F. Kraske (Los Angeles, California) Reflections, Spinors, and Projections on a Minkowski Space Underlie Dirac's Equation 227 Author Index 263 ------------------------------ End of NA Digest ************************** -------