Subject: NA Digest, V. 95, # 02 NA Digest Sunday, January 8, 1995 Volume 95 : Issue 02 Today's Editor: Cleve Moler The MathWorks, Inc. moler@mathworks.com Today's Topics: Congratulations John Rollett New Book, Scientific Computing with PCs Out-of-core Symmetric Banded Solver New Address for Jos van Dorsselaer Positions at AspenTech in Cambridge, UK Contents, SIAM Control and Optimization 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: Gene Golub Date: Sun, 1 Jan 95 15:10:19 PST Subject: Congratulations Belated best wishes to Ake Bjorck and Mike Osborne on the occasion of their 60th birthday. Welcome to the club guys! Gene ------------------------------ From: Iain Duff Date: Fri, 6 Jan 95 16:38:00 GMT Subject: John Rollett John Rollett I am sorry to relate the news from the Oxford University Computing Laboratory that John Rollett died on January 3rd. Apparently he passed away peacefully in his sleep whilst on holiday in Spain. I know that many of you will remember the energy and enthusiasm of John at Oxford. At the moment, I don't have any details of the contact address or funeral arrangements but suggest that you contact Joan Himpson at Joan.Himpson@comlab.ox.ac.uk for further information. ------------------------------ From: John C. Nash Date: Mon, 2 Jan 1995 15:47:58 -0500 (EST) Subject: New Book, Scientific Computing with PCs Announcing the publication of Scientific Computing with PCs by John C. Nash and Mary M. Nash Copyright (C) 1994 J C and M M Nash Available by FTP from the experimental server MacNash.admin.uottawa.ca There is a $10 licence fee for printing this book. The table of contents, the preface and a sample chapter may be downloaded and printed freely without violating the copyright. This sample file is named SCPCDOC.PS. The complete 200-page book is in four PostScript files SCPC-1.PS, ... SCPC-4.PS. For MS-DOS users, there is a ZIP file that reduces the size of the transmission considerably. The layout is designed to use paper efficiently (a traditional layout took 300 pages). The book is a condensation and overview of the extensive experience of the authors with personal computers in scientific applications. The intent is to address "what to" and "why to" calculate rather than "how to". Some of the examples -- not published elsewhere -- are likely to be of special interest to the numerical analysis community. For example, one chapter addresses the issue of comparing implementations of numerical algorithms for efficiency. The results -- spanning almost two decades of testing -- provide a unique and possibly surprising panorama of the difficulties of predicting program performance on even the simplest of codes. The example programs are three variants of the well-known Cholesky decomposition. Another chapter discusses the use of statistical graphics in the comparison on program performance, this time using published results for the performance of optimization codes. Note: The files are .PS (PostScript) because of the graphics and display needed for a book of this type. We have already had a couple of requests for an ASCII form of the book, which we are not prepared to offer at this time. Those without PostScript printing may want to investigate the GhostScript program from gnu. This is available from many software archives, including oak.oakland.edu, where you may need to get the fonts from the unix/gnu/ etc. subdirectories while the program for PCs comes from the msdos section of the archive. John C. Nash, Professor of Management, Faculty of Administration 136 Jean-Jacques Lussier Private, University of Ottawa, Ottawa Ontario, K1N 6N5 Canada jcnash@aix1.uottawa.ca fax 613 564 6518 ------------------------------ From: Najib Abboud Date: Tue, 3 Jan 1995 18:02:34 -0500 Subject: Out-of-core Symmetric Banded Solver I would appreciate any help in locating a public-domain fortran out-of-core solver for a symmetric banded matrix. I would be interested in a wavefront solver but I would like to find out about alternatives if any. I thank you in advance for any pointers, comments ... Najib N. Abboud najib@wai.com ------------------------------ From: Jos van Dorsselaer Date: Thu, 5 Jan 1995 14:22:36 +0100 Subject: New Address for Jos van Dorsselaer Dear colleagues, I moved from Leiden University to Utrecht University. My new address is: Department of Mathematics Utrecht University P.O. Box 80010 3508 TA Utrecht The Netherlands New email-address: dorssela@math.ruu.nl Jos van Dorsselaer ------------------------------ From: Tony Garratt Date: Thu, 05 Jan 1995 12:04:34 GMT Subject: Positions at AspenTech in Cambridge, UK GENERAL COMPUTATIONAL MATHEMATICIAN AND PROGRAMMER FOR SPEEDUP ASPENTECH UK LTD Aspen Technology is the world leader in providing computer modelling and simulation tools to the process industries. Our customers include most of the world's largest chemical companies. Due to expansion at our Cambridge office we currently have 2 positions to join our mathematics development team. The team is responsible for the development of numerical methods needed for the robust solution of a range of problem types in the process simulator SPEEDUP. We require a well qualified numerical mathematician and an experienced mathematical programmer. The numerical mathematician requires experience in one or more of the following areas: Numerical solution of DAEs Numerical solution of PDEs Numerical linear and non-linear algebra Statistics / Parameter Estimation / Data Reconciation Dynamic optimisation / Optimal Control Homotopy methods Manipulation of State-Space Models The mathematical programmer requires experience in one or more of the following areas: Code performance analysis Experience in software development and object oriented design techniques. Design and writing of robust code for complex numerical methods Parallel computing Skills and experience pertinent to both positions are: Working on a range of computer platforms: DEC openVMS, UNIX (various), Windows on machines ranging from PCs to CRAY supercomputers. Strong programming skills: FORTRAN essential with C or C++ an advantage. The ability to locate faults in numerical codes quickly and to resolve such problems efficiently. Good communication skills both written and verbal. Ability to work within a team. Up-to-date with the recently published material. The ability to adapt and pick up new challenges quickly. To apply, please send your CV to: Ms Pauline Cheeseman, AspenTech UK Ltd., Sheraton House, Castle Park, Cambridge CB3 0AX. ------------------------------ From: SIAM Date: Wed, 04 Jan 95 14:07:28 EST Subject: Contents, SIAM Control and Optimization CONTENTS SIAM Journal on Control and Optimization MARCH 1995 Volume 33, Number 2 Jack Warga: In Appreciation H^infinity Optimal Sensitivity for a Class of Infinite-Dimensional Systems Hong Yang Zeros of Spectral Factors, the Geometry of Splitting Subspaces, and the Algebraic Riccati Inequality Anders Lindquist, Gyorgy Michaletzky, and Giorgio Picci A Globally Convergent Successive Approximation Method for Severely Nonsmooth Equations Liqun Qi and Xiaojun Chen Optimal Supervisory Control of Discrete Event Dynamical Systems Ratnesh Kumar and Vijay K. Garg Uniform Stabilization of a Hybrid System of Elasticity Bopeng Rao System Equivalence for Periodic Models and Systems Osvaldo M. Grasselli, Sauro Longhi, and Antonio Tornambe Supervisory Control of Nondeterministic Systems with Driven Events via Prioritized Synchronization and Trajectory Models Mark A. Shayman and Ratnesh Kumar Risk-Sensitive Production Planning of Stochastic Manufacturing Systems: A Singular Perturbation Approach Qing Zhang Multilevel Hierarchical Decision Making in Stochastic Marketing-Production Systems S. P. Sethi and Qing Zhang On Bang-Bang Constrained Solutions of a Control System Raphael Cerf and Carlo Mariconda Dealing with Integral State Constraints in Boundary Control Problems of Quasilinear Elliptic Equations Eduardo Casas and Luis A. Fernandez The Stochastic Maximum Principle for Linear, Convex Optimal Control with Random Coefficients Abel Cadenillas and Ioannis Karatzas Persistency of Excitation in Identification Using Radial Basis Function Approximants A. J. Kurdila, Francis J. Narcowich, and Joseph D. Ward Maximizing Robustness in Nonlinear Illposed Inverse Problems Kazufumi Ito and Karl Kunisch Corrigendum: Lagrange Multipliers in Stochastic Programming Sjur Didrik Flam ------------------------------ End of NA Digest ************************** -------