## NA Digest Sunday, June 7, 1998 Volume 98 : Issue 21

Today's Editor:
Cleve Moler
The MathWorks, Inc.
moler@mathworks.com

### Submissions for NA Digest:

Mail to na.digest@na-net.ornl.gov.

Mail to na.help@na-net.ornl.gov.

URL for the World Wide Web: http://www.netlib.org/na-net/na_home.html
-------------------------------------------------------

From: Nick and Anne Trefethen <lnt@comlab.ox.ac.uk>
Date: Sat, 6 Jun 1998 14:15:11 +0100 (BST)
Subject: Two Weddings

Nick Higham and Francoise Tisseur were married in Francoise's
home town of Veauche, near Saint-Etienne, France, on Saturday,
May 30. The service was bilingual and beautiful, with Des Higham
as best man, and the party afterwards lasted most of the night. Rich
and Leslie Lehoucq were there too, having themselves tied the knot only
one week earlier. Congratulations to all four! Photos of the Higham
wedding at http://homepages.strath.ac.uk/~aas96106/people.html.

Nick and Anne Trefethen

------------------------------

From: William Scott Hoge <shoge@hilbert.cdsp.neu.edu>
Date: Fri, 5 Jun 1998 15:49:04 -0400 (EDT)
Subject: Norm Minimization Question

Greetings,

I am a graduate student at Northeastern University, Boston, MA, and I
have a problem which relates to some image reconstruction work. I am
curious if anyone in the na community has encountered a similar one.

The problem relates to the choice of a matrix X which minimizes the
following norm.

X_{min} = argmin_{X} || S .* ( A - A X X^{\dagger} ) ||

where

1) A is NxN, X is NxM with M<N
2) The norm is the Frobenious norm.
3) .* indicates element-by-element matrix multiplication (Schur product).
4) S is a masking matrix (i.e. ones in the region of interest,
zeros otherwise, or a 2D windowing function ).
5) A has no special properties other than being real valued (it is not
symmetric or positive definite).
6) in some cases X may be constructed from orthonormal columns such
that the pseudo-inverse can be written as, X^{\dagger} = X' .

Has anyone seen or have any leads to a solution of this type of problem?

Wm. Scott Hoge
Communications and Digital Signal Processing Group
ECE Dept. - Northeastern University
http://www.cdsp.neu.edu/info/students/shoge

------------------------------

From: Wolfgang Marquardt <wma@lfpt.RWTH-Aachen.DE>
Date: Sun, 31 May 1998 17:40:44 +0200
Subject: Piecewise Polynomial Approximation

I am looking for a software package which solves the following problem:

Given a scalar nonlinear expression y = f(x_1, ... x_n) or alternatively
0 = F(x_1, ..., x_n, y). f is sufficiently smooth function of n>2 arguments
x_i, i=1, ... n.

We want to compute a piecewise polynomial approximation of f in a given
domain for the arguments x_1, ..., x_2. The approximation must be continuous
and differentiable everywhere. The approximation error in the function itself
and in its first derivatives should be controlled (in some norm) by a user
specified bound.

The code should deliver the grid points (in case of adaptive gridding) and the
polynomial coefficients for the given function and domain.

Thank you very much for your help.

Wolfgang Marquardt
Lehrstuhl fuer Prozesstechnik
RWTH Aachen
Turmstr. 46
52064 Aachen
Germany

Tel.: +49 (0)241-80-6712
Fax: +49 (0)241-8888-326
e-mail: marquardt@lfpt.rwth-aachen.de
secretary@lfpt.rwth-aachen.de
www: http://www.lfpt.rwth-aachen.de

------------------------------

From: Dave Smith <dsmith@popmail.lmu.edu>
Date: Thu, 4 Jun 1998 11:13:07 -0700
Subject: Multiple Precision Package

Dear Colleagues,

Version 1.1 of my FMLIB package of Fortran routines for multiple
precision computation is now available. Version 1.0 appeared in
Transactions on Mathematical Software 17 (1991) 273 -- 283. The
new version has improved speed for many of the original operations,
as well as support for multiple precision integer and complex
arithmetic and functions.

There is also a Fortran-90 module that defines three derived types:
multiple-precision real, multiple-precision integer, and
multiple-precision complex. Interfaces are provided so that a program
can declare variables to be multiple-precision types and then write
the code for multiple-precision operations using normal Fortran
syntax.

The code for these routines, along with several test and sample
programs, may be obtained from
http://cse.eng.lmu.edu/~dsmith/FMLIB.html

Dave Smith

------------------------------

From: Allison Bogardo <bogardo@siam.org>
Date: Fri, 05 Jun 98 11:49:50 -0500
Subject: Theodore von Karman Prize

SIAM will present the Theodore von Karman Prize at the 1999
SIAM Annual Meeting in Atlanta, Georgia, May 12-15. The
award will be given for a notable application of mathematics
to mechanics and/or the engineering sciences made during the
five to ten years preceding the award. The award may be
given either for a single notable achievement or for a
collection of such achievements.

The award consists of a hand-calligraphed certificate and a
$1,000 cash prize. Expenses for the winner to attend the annual meeting to receive the award will be borne by SIAM. Further information about the award, including past winners may be found at http://www.siam.org/prizes/vonkar.htm A letter of nomination, including a description of achievement(s) should be sent by September 1, 1998, preferably by email to: von Karman Prize Selection Committee c/o Allison Bogardo SIAM 3600 University City Science Center Philadelphia, PA 19104-2688 E-mail: bogardo@siam.org Telephone: 215-382-9800 Fax: 215-386-7999 The selection committee consists of Professors Jerrold E. Marsden (Caltech, Chair), Philippe G. Ciarlet (Laboratoire d'Analyse Numerique, Paris), and Joseph B. Keller (Stanford University). ------------------------------ From: Volker Schulz <volker@ica3.uni-stuttgart.de> Date: Thu, 4 Jun 1998 16:07:02 +0200 (METDST) Subject: Special issue of JCAM Special Issue of the Journal of Computational and Applied Mathematics SQP-BASED DIRECT DISCRETIZATION METHODS FOR PRACTICAL OPTIMAL CONTROL PROBLEMS Guest Editor: Volker H. Schulz, ICA3, University of Stuttgart, Germany Deadline for Submission of Full Papers: November 30, 1998 Expected Publication: Spring 1999 The numerical solution of optimal control problems is at the core of many industrial engineering projects. Typically these problems evolve from simulation tasks defining some output states to be influenced by some input controls. During the last years a number of numerical methods have been established, which treat the states and controls together as unknowns of a discretized finite dimensional constrained optimization problem and apply SQP-type methods. Despite the resulting large number of variables this approach has proven very successful. The aim of this special issue is to highlight certain aspects of this approach in the context of ordinary as well as of partial differential equations (i.e. optimal control in ODE/DAE/PDE). This special issue will contain papers presenting new research results in topics including, but not limited to: * Direct discretization methods * Fast solution methods for discretized optimal control problems * Solution error approximation and control * Shape optimization * Inverse modeling / parameter estimation * Optimum experimental design * Off-line control * Feedback control * Nonlinear model predictive control * Applications in industry and/or science & engineering All papers will be refereed. All people working in research fields as listed above are encouraged to submit a contribution according to the theme of this special issue. More information regarding submission of papers can be obtained at http://www.ica3.uni-stuttgart.de/~sijcam ------------------------------ From: Juha Haataja <jhaataja@csc.fi> Date: Thu, 4 Jun 1998 09:28:15 +0300 (EET DST) Subject: Course Material on Computational Science Center for Scientific Computing (Finland) organized an Intensive Course on Computational Science on May 25-29, 1998. Slides and other course material is now available at the WWW address http://www.csc.fi/math_topics/courses/ic98/ Most of the material is in Adobe Acrobat PDF format. The course consisted of about 50 hours of lectures and exercises, and a project work. There were 20 participants from universities, government, and industry. The course was primarily targeted to students and researchers in chemistry and biosciences. The course taught general skills such as mathematical modelling, numerical methods, use of software, and program development. After the course, the participants have a working knowledge of the numerical methods used in standard software packages. In addition, they are ready to participate in program development projects, at least on the level of using subroutine libraries to solve specific subtasks of the problem. Also, participants are familiar with the capabilites of Matlab and Mathematica, which are standard tools for prototyping and solving mathematical problems. Regards, Juha Haataja, CSC ------------------------------ From: Andrew Leung <mbgmsal1@fs1.eng.man.ac.uk> Date: Mon, 1 Jun 1998 16:07:33 BST Subject: Conference on Dynamics, Monitoring and Control DYMAC 99 First International Conference on the Integration of Dynamics, Monitoring and Control Manchester, UK 1-3 September 1999 "Integrating Dynamics, Condition Monitoring and Control for the 21st century" Web site: www.eng.man.ac.uk/mech/dymac99.htm INTRODUCTION In a growing range of industries, such as aerospace, automotive, process, power and manufacturing, there is an increased need for the integration of dynamics, condition monitoring and advanced control. There is an overlap between many of the technologies involved, and this conference aims to bring together academics and practising engineers from a range of supporting disciplines in these fields. Papers are welcome which cover applications of these technologies and/or which report fundamental research which could be relevant to future design and operation of integrated engineering systems of all types, and also those which bridge these technologies in a range of engineering applications. TOPIC AREAS Dynamics: Linear and non-linear dynamics; noise; vibro-acoustics; dynamic testing and identification; smart structures; Control: Advanced control; model predictive control; intelligent control; active control of noise and vibration; process control; adaptive control Condition monitoring: Condition based maintenance; fault diagnosis; fault detection; risk assessment; structural health monitoring Integration and supporting technology: Smart sensors ; Fieldbus; metrology; advanced signal processing; neural networks; multivariate statistics; data compression and fusion; optimisation; system identification SCHEDULE & DEADLINES January 15 1999 Submission of Abstracts February 15 1999 Notification of acceptance May 15 1999 Submit camera ready copy May 15 1999 Early registration discount CALL FOR PAPERS Authors are invited to submit an abstract (400-800 words) by January 15, 1999, to: Dr Andrew Starr Conference Secretary, DYMAC'99 Manchester School of Engineering The University of Manchester Oxford Road Manchester M13 9PL, UK Tel (+44) 161 275 4302 Fax (+44) 161 275 4346 E mail: andrew.starr@man.ac.uk ------------------------------ From: Beatriz Moreno <cimaf@cidet.icmf.inf.cu> Date: Wed, 3 Jun 1998 15:23:30 -0500 (CUBA) Subject: Institute of Cybernetics, Mathematics and Physics The Institute of Cybernetics, Mathematics, and Physics (ICIMAF) is pleased to announce the International Conference CIMAF99 under the theme Science and Technology for Development. The Conference is aimed at fostering a fruitful, long-lasting exchange of ideas and knowledge on current problems of crucial importance for the development of our countries. The Conference will feature the following events : 5 th. Mathematics Symposium. 1 st Workshop on Combinatory, Geometry, Coding Theory and Related Areas. 1 st Workshop on Numerical Analysis and Differential Equations. 9 th. Cuba -Mexico Statistics Meeting. 4 th. Ibero - American Pattern Recognition Symposium.. 2 nd. Workshop on Quantum Mechanics, Particles and Fields. 3 rd. Ultrasonic Symposium. 2 nd. Artificial Intelligence Symposium. 2 nd. Automatic Control Symposium. 2 nd. Telematics Symposium. 2 nd. Meeting on Current Trends in Research and Development Management. For further information please contact : Organizer Mrs. Carmen Seara Alvarez. Calle 15 No. 551 e/ C y D Codigo Postal 10400. La Habana Cuba. Tlx.512230 icimaf cu Fax(537) 33 33 73 Tel.(537) 33 33 73, 32 77 64 and 32 26 88 E-mail cimaf@cidet.icmf.inf.cu Scientific Program : Dr. Manuel Lazo Cortes. Calle 15 No. 551 e/ C y D Codigo Postal 10400. La Habana, Cuba. Fax(537) 33 3373. Tel.(537) 33 3373, 32 7764, 32 2688 and 32 4567. Professional Congress Organizer : Mrs. Alicia Garcia Gonzalez. Palacio de las Convenciones. Codigo Postal 16046 La Habana, Cuba. Tlx. 51 16 09 Palco cu. Fax.(537)22 8382 and 21 9496. Tel. (537) 21 5199. E-mail aliciag@palco.get.cma.net ------------------------------ From: Endre Suli <endre@comlab.ox.ac.uk> Date: Thu, 4 Jun 1998 14:57:34 +0100 (BST) Subject: Foundations of Computational Mathematics Foundations of Computational Mathematics Conference Oxford University, U.K. July 18-28, 1999 FIRST CALL FOR REGISTRATION http://www.damtp.cam.ac.uk/user/na/FoCM/Oxford.html Oxford University is hosting the Foundations of Computational Mathematics Conference (FoCM99) in July 18-28, 1999. The mission of the meeting is to establish a common agenda between computation, pure mathematics and computer science. While presenting plenary talks by foremost world authorities and maintaining the highest technical level in workshops, the emphasis will be on multidisciplinary interaction across subjects and disciplines, in an informal and friendly atmosphere. The overall oversight of FoCM99 is the responsibility of the FoCM Executive Committee whose current Chair is Arieh Iserles (University of Cambridge). The organisation of the 1999 meeting is managed by the LOCAL ORGANISING COMMITTEE: John Ball (Oxford), Richard Brent (Oxford), Chris Budd (Bath), Mike Giles (Oxford), Nick Gould (Rutherford-Appleton Labs), Nick Higham (Manchester), Bill McColl (Oxford), Endre Suli (Chair, Oxford), Nick Trefethen (Oxford) PLENARY SPEAKERS: John BALL (Oxford University, UK) Ingrid DAUBECHIES (Princeton University, USA) Jean Pierre DEDIEU (Universite Toulouse, France) Alan EDELMAN (Massachusetts Institute of Technology, USA) Joos HEINTZ (Universidad de Buenos Aires, Bazil) Nick HIGHAM (University of Manchester, UK) Jorge NOCEDAL (Northwestern University, USA) Erich NOVAK (Universitat Erlangen, Germany) Peter OLVER (University of Minnesota, USA) Bjorn POONEN (University of California at Berkeley, USA) Rolf RANNACHER (Universitat Heidelberg, Germany) Jesus Maria SANZ-SERNA (Universidad de Valladolid, Spain) Guillermo SAPIRO (University of Minnesota, USA) Andrew STUART (Stanford University, USA) Denis TALAY (INRIA Centre de Sophia Antipolis, France) William THURSTON (University of California at Davis, USA) Leslie VALIANT (Harvard University, USA) Shing-Tung YAU (Harvard University, USA) WORKSHOPS and their organisers: * Analysis and approximation of infinite-dimensional problems John Ball (Oxford) and Endre Suli (Oxford) * Approximation theory Ron DeVore (South Carolina) and Allan Pinkus (Haifa) * Complexity theory, real machines and homotopy Jean-Pierre Dedieu (Toulouse) and Pascal Koiran (Lyon) * Computational Dynamics John Guckenheimer (Cornell) and Robert MacKay (Cambridge) * Computational geometry and topology David Epstein (Warwick) and David Gabai (Caltech) * Computational number theory Richard Brent (Oxford) and Henri Cohen (Bordeaux) * Geometric integration and computation on manifolds Chris Budd (Bath) and Hans Munthe-Kaas (Bergen) * Information-based complexity Stefan Heinrich (Keiserslautern) and Erich Novak (Erlangen) * Multiresolution, computer vision and PDEs Vicent Caselles (UIB, Palma) and Wolfgang Dahmen (Aachen) * Numerical linear algebra Alan Edelman (MIT) and Nick Higham (Manchester) * Optimisation Nick Gould (RAL) and Mike Todd (Cornell) * Relations to computer science Laszlo Lovasz (Yale) and Bill McColl (Oxford) * Stochastic computation Peter Kloeden (Berlin) and Dominique Picard (Paris-VII) * Symbolic algebra and computational algebraic geometry James Davenport (Bath) and Elizabeth Mansfield (Canterbury) CONTACT INFORMATION: For further information, see: http://www.damtp.cam.ac.uk/user/na/FoCM/Oxford.html or e-mail to FoCM@comlab.ox.ac.uk ------------------------------ From: Pasi Tarvainen <pht@math.jyu.fi> Date: Fri, 5 Jun 1998 09:13:42 +0300 (EETDST) Subject: European Conference on Numerical Mathematics and Advanced Applications First Announcement ENUMATH 99 Third European Conference on Numerical Mathematics and Advanced Applications July 26 - 30, 1999 Jyvaskyla, FINLAND Programme Committee F. Brezzi (Italy) M. Feistauer (Czech Republic) R. Glowinski (USA/France) R. Jeltsch (Switzerland) Yu. Kuznetsov (USA/Russia) J. Periaux (France) R. Rannacher (Germany) Scientific Committee O. Axelsson (Netherlands) U. Langer (Austria) H.G. Bock (Germany) P. Le Tallec (France) C. Canuto (Italy) K.W. Morton (UK) M. Griebel (Germany) P. Neittaanmaki (Finland) C. Johnson (Sweden) O. Pironneau (France) G. Kobelkov (Russia) D. Talay (France) W. Wendland (Germany) Local Organising Committee P. Neittaanmaki T. Tiihonen T. Karkkainen T. Rossi P. Tarvainen AIM AND SCOPE The ENUMATH conferences were established in 1995 in order to provide a forum for discussion on recent aspects of numerical mathematics. They seek to convene leading experts and young scientists with special emphasis on contributions from Europe. Recent results and new trends in the analysis of numerical algorithms as well as their application to challenging scientific and industrial problems will be discussed. Apart from theoretical aspects, a major part of the conference will be devoted to numerical methods for interdisciplinary applications. STRUCTURE OF THE CONFERENCE The program of the conference will consist of * about 10 invited lectures * about 10 minisymposia on specific topics * contributed papers (oral presentation) * a poster session LOCATION AND DATE The conference will be held in Jyvaskyla (Finland) on July 26-30, 1999. The Conference venue is Jyvaskyla, a lively university and industrial town with some 80 000 inhabitants. Throughout the year the city offers a rich variety of cultural events and programmes, and it is also called a paradise of sports and fitness lovers, as the region offers something for every taste. ENUMATH 99 will be held on the Mattilanniemi Campus Area of the University of Jyvaskyla. This area lies within walking distance of the city centre and a range of comfortable hotels. Dormitory accommodation will also be possible. SECOND ANNOUNCEMENT The Second Announcement and Call for papers with information about * Invited Speakers * Planned Minisymposia * Submission of Contributions * Registration Fee and Social Programme * etc. will be sent out in October 1998. CONTACT INFORMATION Address: Mrs. E. Laiho-Logren Secretary ENUMATH 99 Department of Mathematics University of Jyvaskyla P.O. Box 35 FIN-40351 Jyvaskyla, FINLAND Tel: +358 14 602732 Fax: +358 14 602731 +358 14 602771 E-mail: enumath99@math.jyu.fi Up-to-date information about the ENUMATH 99 Conference is available at: http://www.math.jyu.fi/enumath ------------------------------ From: P. Y. Yalamov <yalamov@imm.dtu.dk> Date: Fri, 5 Jun 1998 14:25:53 +0200 (METDST) Subject: Large-Scale Scientific Computation Workshop in Bulgaria FIRST ANNOUNCEMENT AND CALL FOR PAPERS Second Workshop on LARGE-SCALE SCIENTIFIC COMPUTATION ORGANIZED BY: The Central Laboratory on Parallel Processing, Bulgarian Academy of Sciences (CLPP-BAS) in cooperation with the Division of Numerical Analysis and Statistics, University of Rousse (UR), Bulgaria. SCIENTIFIC COMMITTEE: Myron Allen (US), Owe Axelsson (NL), Robert Beauwens (BE), Dario Bini (I), Radim Blaheta (CZ), Peter Binev (BG), Ivan Dimov (BG), Stefka Dimova (BG), Oleg Iliev (BG), Michael Griebel (D), Mikhail Kaschiev (BG), Raytcho Lazarov (US/BG), Eugene Tyrtyshnikov (RUS), Marcin Paprzycki (US), Robert Plemmons (US), Michael Schaefer (D), Blagovest Sendov (BG), Joachim Stoeckler (D), Lutz Tobiska (D), V. Voevodin (RUS), Ragnar Winther (NO), Zahary Zlatev (DK); PLENARY AND INVITED SPEAKERS: Owe Axelsson, KUN, Nijmegen, The Netherlands; Dario Bini, University of Pisa, Pisa, Italy; Michael Griebel, University of Bonn, Germany; Raytcho Lazarov, Texas A \& M University, College Station, TX, USA; Eugene Tyrtyshnikov, Institute of Numerical Mathematics, RAS, Moscow, Russia; Robert Plemmons, Wake Forest University, Winston-Salem, NC, USA; Zahary Zlatev, National Environmental Research Institute, Denmark. LOCAL ORGANIZING COMMITTEE: S. D. Margenov (CLPP-BAS), P. S. Vassilevski (CLPP-BAS), and P. Y. Yalamov (UR). SPECIAL TRACKS: - Computational Linear Algebra; - Large-Scale Scientific Computations of Engineering and Environmental Problems TIME: The workshop is scheduled for June 2-6, 1999, with arrival on June 1, and departure after midday on June 6. PLACE: The workshop will be held in the picturesque town of Sozopol, on the Black Sea coast, 36 km to the south from Burgas (the nearest airport). SPECIAL SESSIONS: Following the already established tradition, special sessions will be organized in the framework of the workshop. Participants interested in organizing such special sessions are invited to contact any of the organizers or the secretary of the meeting. To express intent to attend the workshop, please, send a letter, an e-mail (preferable), or a fax message to the conference secretary (see below). MORE INFORMATION: http://copern.acad.bg/Conferences/SciCom99.html http://orca.st.usm.edu/marcin/mp/cfp/SciCom99.html CONTACT PERSONS: S. D. Margenov (margenov@parallel.acad.bg) P. S. Vassilevski (panayot@iscbg.acad.bg) Silvia Grozdanova (scicom99@parallel.acad.bg) - Conference secretary CLPP-BAS, Acad. G. Bontchev'' street, Block 25A, 1113 Sofia, Bulgaria FAX: (+359 2) 707 273 P. Y. Yalamov (yalamov@ami.ru.acad.bg) University of Rousse 7017 Rousse, Bulgaria FAX: (+359 82) 455 145 ------------------------------ From: Trini Flores <flores@siam.org> Date: Fri, 05 Jun 98 08:24:46 -0500 Subject: SIAM Conference on Optimization Sixth SIAM Conference on Optimization May 10-12, 1999 Radisson Atlanta Hotel Atlanta, Georgia Sponsored by SIAM Activity Group on Optimization Submissions for minisymposium proposals and contributed abstracts are welcome. For additional information about the conference, visit www.siam.org/meetings/op99/. ------------------------------ From: Mike Henderson <HENDER@watson.ibm.com> Date: Fri, 5 Jun 98 14:29:48 EDT Subject: SIAM Workshop on Object Oriented Methods Second Call for Participation: SIAM Workshop on Object Oriented Methods for Inter-operable Scientific and Engineering Computing October 21-23, 1998 IBM TJ Watson Research Center Yorktown Heights, New York This is a reminder that the deadline for submitting papers to this workshop (June 31), is approaching. The announcement, and details for submitting can be found at http://www.siam.org/meetings/oo98. Mike Henderson mhender@watson.ibm.com ------------------------------ From: Francoise Chatelin <Francoise.Chatelin@cerfacs.fr> Date: Fri, 5 Jun 1998 14:29:33 +0200 (MET DST) Subject: Research Position at CERFACS Position at CERFACS Space missions using altimetry are a major component for the global monitoring of the oceans. The French-American TOPEX/POSEIDON mission is the current best example of such an approach. The NASA-CNES JASON project will follow TOPEX after year 2000 and will have improved performance. The objective is to know JASON's altitude with a precision of 1 cm rms (the error level for TOPEX is currently around 3 cm using the DORIS and Laser tracking systems). JASON will also use DORIS and Laser, as well as a GPS receiver. CNES is in charge of the precise orbit determination of JASON. It is thus necessary to improve the processing of GPS measurements at CNES in order to reach the required accuracy through a combination of GPS with the other two systems. Correct use of GPS phase measurements is a keypoint for this objective. CERFACS has been charged by CNES to develop accurate algorithms to compute the phase ambiguities associated with the GPS measurements. In this context we are looking for a researcher at post-doc level with experience, interest, and background (with publications) in scientific computing to participate in the development of these algorithms. The position is already open and should be filled as soon as possible. The position is in the Qualitative Computing Group at CERFACS, whose main research activities are - study of the stability and the reliability of numerical methods, specifically in the neighbourhood of singularities, - design of robust codes for computing some eigenelements of very large and nonnormal matrices (Arnoldi Tchebycheff method), - influence of high nonnormality on reliability of numerical methods, - software tools for assessing the quality (reliability, robustness) of numerical methods. This group is part of the Parallel Algorithms Project lead by Iain Duff. For detailed information about CERFACS URL address : http://www.cerfacs.fr/algor For more information about Toulouse, the city where CERFACS is located URL address : http://www.mairie-toulouse.fr/accueilU.htm The recruitment procedure is described at the URL address : http://www.cerfacs.fr/admin/rules.html For any question, please send email to chatelin@cerfacs.fr. ------------------------------ From: Hans Munthe-Kaas <hans.munthe-kaas@ii.uib.no> Date: Sun, 7 Jun 1998 11:22:27 +0200 Subject: Scholarship at University of Bergen, Norway PhD project - Numerical analysis on manifolds / Geometric integration At Department of Informatics, University of Bergen, Norway, a PhD scholarship is available. The scholarship is open to any area of research covered by the department, i.e. computer science, numerical analysis and scientific computing, optimization, coding theory and bio-informatics. I would like to attract applicants who are interested in conducting research within one of the following topics: 1) Geometric integration of ordinary and partial differential equations on manifolds. 2) Applications of symmetry methods in numerical solution of differential equations. 3) Object oriented abstractions in numerical analysis, based on coordinate free formulations. These are areas of very active research, and the group in Bergen is collaborating closely with other groups nationally and internationally. Candidates must have a strong motivation for learning modern (abstract) treatments of differential equations. Topics 1) and 2) are suitable for students with a background in numerical analysis/ applied mathematics. Topic 3) could be suitable for students with a strong background in computer science, and who would like to apply techniques like algebraic specifications/ algebraic programming technology in the area of computational mathematics. More info on this project: http://www.ii.uib.no/~hans/phd_manifold.html or contact me directly. If you are interested in the scholarship, but NOT in this project, please do NOT contact me. You will find the necessary information on: http://www.ii.uib.no/~hans/eng_stipend.html Application deadline: June 17. 1998. Best regards, Prof. Hans Munthe-Kaas Email: hans.munthe-kaas@ii.uib.no Department of Informatics Phone: (+47) - 55584179 University of Bergen FAX : (+47) - 55584199 N-5020 Norway WWW: http://www.ii.uib.no/~hans/ ------------------------------ From: Bo Kagstr|m <Bo.Kagstrom@cs.umu.se> Date: Mon, 1 Jun 1998 19:28:41 +0200 (MET DST) Subject: Faculty Position at Umea Univ, Sweden UMEA UNIVERSITY IN SWEDEN ANNOUNCES AN ASSISTANT PROFESSORSHIP IN HIGH-PERFORMANCE AND SCIENTIFIC COMPUTING Umea University on the east coast of northern Sweden is a young and dynamic university with over 23 000 students and 3900 employees. Education and research cover a wide and comprehensive field. The University is expanding in research and development in computational science. We now welcome applications for a position as Assistant Professor of High-Performance and Scientific Computing at the Department of Computing Science. In addition to pursuing research, the successful candidate is expected to assist in supervising graduate students and preferably also in attracting research grants. In order to qualify for the position you should have a doctoral degree (or equivalent) which is not more than five years old. The position is for two years, with a two years prolongation. The position can optionally be prolonged up to a total of six years by teaching on under-graduate level. The successful candidate is expected to work in collaboration with existing research groups at the Department and the High Performance Computing Center North (HPC2N). Today research is conducted in high-performance and parallel computing, numerical linear algebra with applications, optimization, differential-algebraic systems of equations, mathematical and scientific software. We also encourage applicants that represent other areas of research and applications in scientific computing. HPC2N is a national center for scientific and parallel computing located at Umea University.(See http://www.hpc2n.umu.se). Umea University offers academic and industrial users access to leading-edge high-performance computing systems. This includes a Silicon Graphics Onyx2 with two InfiniteReality2 graphics units, and a scalable 66-node IBM SP system with 32.5 Gflops/sec. peak performance. (See http://www.hpc2n.umu.se/system). For further information, please contact Professor Bo Kagstrom, Chairman of the Department of Computing Science, phone: +46-90-786 54 19, email: bokg@cs.umu.se, or Professor Per-Ake Wedin, phone: +46-90-786 54 39, email: pwedin@cs.umu.se. Applications should include a curriculum vitae, copies of degree certificates, a statement of previous research achievements and teaching merits, a list of publications, and reprints numbered according to the list, all in four copies. The application should be marked dnr 3152-926-98 and sent to Registrator, Umea University, SE-901 87 Umea, Sweden. Closing date is June 15, 1998. ------------------------------ From: Ekkehard Sachs <mathopt@dm5.uni-trier.de> Date: Thu, 4 Jun 1998 10:39:33 +0200 Subject: Graduate and Postdoctoral Positions at University of Trier Graduate and Postdoctoral positions in the Graduate Program in Mathematical Optimization University of Trier Germany Scholarships and postdoc positions in Mathematical Optimization will become available on October 1, 1998 or earlier The main research areas in the graduate program are - Global Optimization, Multiple Objective Optimization (Prof. Dr. Reiner Horst) - Computational Complexity (Prof. Dr. Christoph Meinel) - VLSI-Design and Formal Verification (Prof. Dr. Christoph Meinel) - Numerical Methods in Optimization and Optimal Control (Prof. Dr. Ekkehard Sachs) - Ill-posed Variational Problems (Variational Inequalities, Semi-infinite Optimization) (Prof. Dr. Rainer Tichatschke). The scholarships are DM 1.600 per month (or higher for qualified applicants) according to the regulations of the German Research Foundation (DFG). The salary for postdocs is DM 2.790 per month. The letter of application should include - curriculum vitae, copy of degree certificates, - short description of prospective research program, - copies of scientific papers (thesis, etc.), - letter of recommendation. The applications should be sent until July 3, 1998 to Prof. Dr. E. Sachs Sprecher des Graduiertenkollegs Mathematische Optimierung Universitaet Trier D-54286 Trier For further information see http://mathopt.uni-trier.de or contact the office: Telephone +49 651 201-3477 Telefax +49 651 201-3973 E-Mail mathopt@uni-trier.de ------------------------------ From: Thomas Hogan <hogan@math.ohio-state.edu> Date: Sat, 6 Jun 1998 17:17:50 -0400 (EDT) Subject: Contents, Journal of Approximation Theory Table of Contents: J. Approx. Theory, Volume 93, Number 3, June 1998 S. B. Damelin Converse and smoothness theorems for Erd\H{o}s weights in$L_p$($0<p\le\infty$) 349--398 Tingfan Xie, Ren Jiang Zhang, and Songping Zhou Three conjectures on Shepard interpolatory operators 399--414 Shusheng Xu Successive approximate algorithm for best approximation from a polyhedron 415--433 Franck Beaucoup Maximal points of stable and related polynomials 434--440 R. Sakai Convergence of modified Lagrange interpolation to$L_p$-functions based on the zeros of orthonormal polynomials with Freud weights 441--449 Peter Borwein and Tam\'as Erd\'elyi A Remez-type inequality for non-dense M\"untz spaces with explicit bound 450--457 Alexander G. Kulakov Convergence of weighted polynomial approximations to solutions of partial differential equations with quasianalytical coefficients 458--479 Jian-Hua Wang Convergence theorems for best approximations in a nonreflexive Banach space 480--490 Mitsuhiro T. Nakao, Nobito Yamamoto, and Seiji Kimura On the best constant in the error bound for the$H_0^1$-projection into piecewise polynomial spaces 491--500 Leszek Plaskota Average case$L_\infty\$-approximation in the presence of Gaussian noise
501--515

Author index for Volume 93
516

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