NA Digest Sunday, April 29, 2001 Volume 01 : Issue 17

Today's Editor:
Cleve Moler
The MathWorks, Inc.

Submissions for NA Digest:

Mail to

Information about NA-NET:

Mail to

URL for the World Wide Web:

From: Gene Golub <golub@sccm.Stanford.EDU>
Date: Wed, 25 Apr 101 10:44:18 -0700 (PDT)
Subject: Congratulations to Walter Gautschi

Prof Walter Gautschi of Purdue University was recently elected to the
prestigious Bavarian Academy of Sciences, The citation (translation) reads

Prof. em. Dr. Walter Gautschi, born 1927, is a professor emeritus of
mathematics at Purdue University in West Lafayette, USA. Gautschi,
born in Basel, is an internationally renowned applied
mathematician. His primary areas are numerical mathematics,
constructive approximation theory and the theory of special functions
(he is considered the world's leading expert for evaluating the latter).

Congratulations, Walter, and thanks for all the many elegant results you
have produced.

Gene Golub


From: Lin Ji <>
Date: Fri, 27 Apr 2001 12:02:43 -0400
Subject: PDE Solver in Unbounded Domain Wanted

I am currently involved in a research project to recover elastic
properties of biological tissue. We need to solve the wave equation in
unbounded half space. Can someone recommend some hyperbolic PDE solver? It
would be better if it can solve elastic wave equation in 3D space.
I would appreciate your help.

Lin Ji
Dept. of Math., RPI


From: Tim Davis <>
Date: Fri, 27 Apr 2001 17:12:54 -0400
Subject: UMFPACK, Unsymmetric Sparse LU Software

In an earlier NA Digest posting I announced UMFPACK V3.0 Beta, a package for
solving unsymmetric sparse linear systems (written in C, with both a C-callable
and Matlab interface). The final version is now available. See for more information.

Tim Davis
Univ. of Florida


From: Shaun Forth <>
Date: Mon, 23 Apr 2001 16:53:15 +0100
Subject: Optimization Test Problems in MATLAB

I'm currently developing and testing an Automatic Differentiation tool
in Matlab. I'm particularly interested in studying the MINPACK-2 test
problems. If you have coded all/any of these in Matlab and would be
willing to pass them on then I'd be most grateful.

Shaun Forth


From: Tom Wright <>
Date: Wed, 25 Apr 2001 17:14:43 +0100
Subject: Pseudospectra GUI for MATLAB

Version 1.2 of the Pseudospectra GUI for MATLAB is now released. This
new version includes only minor external changes, but can provide
speedups of a factor of up to TEN compared with previous versions; take
a look at the following examples (running on my Sun Ultra 5 with MATLAB 6):

opts.npts = 200 % Grid size of 200 by 200
tic; psa(gallery(5),opts); toc
% Old: 29 seconds, new: 6 seconds

opts.npts = 100 % Grid size of 100 by 100 (real matrix)
tic; psa(triu(randn(100)),opts); toc
% Old: 281 seconds, new: 26 seconds

opts.npts = 50 % Grid size of 50 by 50 (complex matrix)
tic; psa(toeplitz([-i pi i./[1:98]],-i./[1:100]),opts); toc
% Old: 294 seconds, new: 31 seconds

opts.npts = 40 % Grid size of 40 by 40
tic; psa(gallery('chebspec',500),opts); toc
% Old: 605 seconds, new: 128 seconds

This speed increase has mainly been obtained by re-writing the
computational core of the GUI as a C mex-file.

The Pseudospectra GUI can be downloaded from:

Tom Wright
Numerical Analysis Group
Oxford University


From: Pijush Bhattacharyya <>
Date: Tue, 24 Apr 2001 13:15:05 +0100
Subject: Bisection Algorithm

One of my undergraduate student is investigating the Bisection Algorithm
and how it never converges on to an even numbered root and always finds odd
numbered root ( Ref.'Which root does the bisection algorithm find?' by
George Corliss in "Mathematical Modelling:Classroom Notes", Ed.M.S.Klamkin,
SIAM 1995).

If all the roots are uniformly randomly distributed over the entire
initial interval then the algorithm will find odd roots with equal
probability. But it was observed that once the all the roots are
clustered, these probabilities change, depending very much on the
position of the cluster with respect to the initial interval and
bisected sub-intervals (His procedure in java simulates this scenario).
He seems to find no further information on these varying probabilities.

We would be much obliged if someone could inform us of any recent
developments in this area and/or where we can get hold of this information.

Pijush and Amar


From: Alexander Wiegand <>
Date: Tue, 24 Apr 2001 11:53:08 +0200
Subject: New Book, Wavelet Methods in PDEs and Control

Kunoth, Angela
Wavelet Methods - Elliptic Boundary Value Problems and Control Problems
1. Ed. 2001, Teubner Verlag, (English)
78,00 DM, ISBN 3-519-00327-9

This research monograph deals with applying recently developed wavelet
methods to stationary operator equations involving elliptic
differential equations. Particular emphasis is placed on the treatment
of the boundary and the boundary conditions.
While wavelets have since their discovery mainly been applied to
problems in signal analysis and image compression, their analytic power
has also been recognized for problems in Numerical Analysis. Together
with the functional analytic framework for differential and integral
quations, one has been able to conceptually discuss questions which are
relevant for the fast numerical solution of such problems:
preconditioning, stable discretizations, compression of full matrices,
evaluation of difficult norms, and adaptive refinements. The present
text focusses on wavelet methods for elliptic boundary value problems
and control problems to show the conceptual strengths of wavelet techniques.

A General Concept - Multiscale Decomposition of Function Spaces -
Wavelets on Bounded Domains and Manifolds - Elliptic Boundary - Value
Problems - The Fictitious Domain-Lagrange Multiplier Approach -
Stability for the Saddle Point Problem: The LBB Condition - Least
Squares Formulation of General Saddle Point Problems - Wavelet
Representation of Least Squares Systems - Preconditioning and
Computational Work - Control Problems - Weakly Coupled Saddle Point =
Problems - Semi-Iterative Methods - A Fully Iterative Method for =
Coupled Saddle Point Problems - Complexity Analysis - Numerical =

Prof. Dr. Angela Kunoth, Universit=E4t Bonn

Distribution Books:
Verlag B.G. Teubner
Abraham-Lincoln-Str. 46
65189 Wiesbaden

Mr. R=FCdiger Pech
Tel. +49.(0)611.7878-357
Fax +49.(0)611.7878-420


From: Juha Haataja <>
Date: Fri, 27 Apr 2001 15:34:27 +0300 (EEST)
Subject: Finnish Report on Scientific Computing

CSC Report on Scientific Computing 1999-2000 now published

CSC Report on Scientific Computing is a collection of articles describing
the computing projects of CSC's customers as well as activities at CSC.
The articles are written in English and the report is published every two

CSC -- Scientific Computing Ltd. is a non-profit organization for
high-performance computing and networking in Finland. CSC is owned by
the Ministry of Education. CSC runs a national large-scale facility
for computational science and engineering and supports the university
and research community. CSC is also responsible for the operations of
the Finnish University and Research Network (Funet).

The newest report contains 35 articles of CSC's customer projects in the
fields of physics, chemistry, biosciences, medicine, earth sciences and
engineering among others. The report contains also a short overview of CSC
services presenting customer statistics, research collaboration, results
of computational surveys in Finland as well as the latest developments in
our metacomputing environment. Of course, this report shows only a small
fraction of results obtained with CSC computers. CSC has over 1500
computational users who are involved in over 600 active research projects.

The report is available in Adobe Acrobat PDF format at

It can also be ordered from CSC by using the order form at

We hope that you will enjoy this interdisciplinary review of scientific
computing. Any comments about this report are welcome to email address


Juha Haataja
Development Manager, Science Support
CSC - Scientific Computing Ltd., Box 405, FIN-02101 Espoo
Phone: +358 9 457 2731
Fax: +358 9 457 2302


From: Bruce Simpson <>
Date: Thu, 26 Apr 2001 15:50:02 -0400
Subject: Southern Ontario Numerical Analysis Day, Waterloo

Southern Ontario Numerical Analysis Day, 2001, will be held at the University
of Waterloo, Friday, June 15.

Speakers will include Justin Wan (Waterloo), Tamas Terlaky (McMaster),
and Cleve Moler (MathWorks).

For room location, parking, and evolving program details, see

e-mail contact:


From: Ali Sayed <>
Date: Mon, 23 Apr 2001 15:39:59 -0700
Subject: Symposium in Cairo on Signal Processing and Information Technology

The 1st IEEE International Symposium on
Signal Processing and Information Technology
December 28-30, 2001, Cairo, Egypt

The IEEE ISSPIT 2001 is the first in a series of international symposia
that aims to cover most of the aspects in the fields of signal
processing and information technology. The program will include
tutorials in addition to presentations on new research results.

Papers describing original work are invited in any of the areas listed
below. Accepted papers will be published in the Proceedings of the IEEE
ISSPIT 2001. Acceptance will be based on quality, relevance, and
originality. Contests for Best Paper Award and Best Student Paper Award
will be held.

Papers are invited in the following topics:

* Signal processing theory and methods.
* Signal processing for communications.
* Digital filters, adaptive filters, and filter banks.
* Implementation of signal processing systems.
* Multimedia signal processing.
* Multimedia systems.
* Image and multidimensional signal processing.
* Parallel and distributed computing.
* Computer network and the Internet.
* Object-oriented approaches.
* Advanced data base systems and their applications.
* Knowledge based systems.
* Special Session on Electrical Engineering Education (in relevant areas).

Prospective authors are invited to submit 4 copies of full-length,
four-page papers in two-column formats including diagrams and
references. Authors can also submit their papers as attached PDF or
Postscript files to an e-mail. The title page should include
author(s) name(s), affiliation, mailing address, telephone, fax, and
e-mail address. The author should indicate one or two of the above
categories that best describe the topic of the paper. Manuscripts
should be submitted to:

Prof. A. H. Sayed
Technical Program Chairman, ISSPIT 2001
Electrical Engineering Department
Univerity of California
Los Angeles, CA 90095-1594
Tel: +(310)267-2142
Fax: +(310)206-8495

Important Dates:

Proposals for tutorials (June 1st, 2001)
Four-page, full-paper submission (July 1st, 2001)
Notification of acceptance (Sep. 1st, 2001)
Final version paper with registration (Oct. 1st, 2001)


From: NCTS Announcement <>
Date: Wed, 25 Apr 2001 16:59:26 +0800
Subject: Congress of Chinese Mathematicians

Dear Colleague,

The Second International Congress of Chinese Mathematicians (ICCM 2001)
will be held from December 17 to 22, 2001 at the Grand Hotel in Taipei,
Taiwan. Detailed information, including the list of plenary and invited
speakers, can be found at the web site at

The conference on-line registration and abstract submission system is now
available. We encourage you to visit the web page to register and to
submit your abstract(s) for ICCM 2001. Please note that the deadline for
early registration and paper submission is July 15, 2001. After the
deadline, you must register for the conference on-site.

If you have any question regarding the conference and the on-line
registration system, please feel free to contact us. We are looking
forward to seeing you in Taipei this December.

ICCM 2001 Local Committee


From: Marie-Laurence Mazure <>
Date: Wed, 25 Apr 2001 15:48:06 +0200
Subject: Conference in France on Curves and Surfaces

Fifth International Conference on
organized by AFA-SMAI at Saint-Malo, France,
June 27-July 3, 2002.

Fax: 33 4 76 63 12 63
Postal address:
Curves and Surfaces, LMC-IMAG, Universite Joseph Fourier,
BP 53, 38041 Grenoble, cedex 9, France

Albert Cohen (Paris), Tom Lyche (Oslo), Marie-Laurence Mazure (Grenoble),
Jean-Louis Merrien (Rennes), Larry Schumaker (Nashville).

- Representation and approximation of curves and surfaces (splines, finite
elements, subdivision, mesh processing,...),
- Computer aided geometric design,
- Curve and surface fitting (scattered data, variational methods, radial
- Multiresolution techniques (wavelets, hierarchical bases,...),
- Shape optimization,
- Curves and surfaces in industry,
- Related topics and applications : signal and image processing, computer
vision, visualization, solid modelling, reverse engineering, computational
geometry, manufacturing geometry,...

- Ron DeVore (USA), Analogue to digital conversion.
- Rida Farouki (USA), Minkowski geometric algebra of complex sets.
- Olivier Faugeras (France and USA), title to be announced.
- Paul-Louis George (France), Curve and surface meshing for finite element
- Ron Kimmel (Israel), Marching on triangulated domains.
- Will Light (UK), Radial basis functions.
- Stephane Mallat (France and USA), Geometrical image representations with
- Pascal Massart (France), title to be announced.
- Ed Saff (USA), title to be announced.
- Peter Schroeder (USA), Multiresolution methods in computer graphics.
- Tamas Varady (Hungary), Constrained fitting for multiple surfaces.

- Effective computational geometry for curves and surfaces,
Organizer: Jean-Daniel Boissonnat (France).
- Parametrization and surface reconstruction,
Organizer: Michael Floater (Norway).
- 3D-meshing for simulation and visualization,
Organizer: Guenther Greiner (Germany).
- Adaptative mesh generation,
Organizer: Michael Griebel (Germany).
- Industrial geometry,
Organizer: Bert Juettler (Austria).
- Subdivision techniques: recent trends and applications,
Organizer: Leif Kobbelt (Germany).
- Radial basis functions and applications,
Organizer: Robert Schaback (Germany).
- Wavelet approximation and applications,
Organizer: Zuowei Shen (Singapore).
- Image synthesis,
Organizer: Francois Sillion (France).
- Nonlinear approximation,
Organizer: Vladimir Temlyakov (USA).


From: Zhaojun Bai <>
Date: Thu, 26 Apr 2001 14:16:11 -0700 (PDT)
Subject: Sympoisum at Stanford on Iterative Methods in Linear Algebra

Friday May 4th, 2001, Durand 450, Stanford University


Mark Adams, Sandia National Labs.,
A.O.H. Axelsson, University of Nijmegen
Anne Greenbaum, University of Washington
Chen Greif, Parametric Technology Corp.
Eldad Haber, University of British Columbia
Sverker Holmgren, University of Uppsala
Marko Huhtanen, University of Helsinki
Thomas Strohmer, University of California, Davis
Per Sundqvist, University of Uppsala
Eugene Wachspress
Andy Wathen, Oxford University

Please indicate to Gene Golub ( whether you are
likely to attend and whether you (and friend) are likely to be at the
evening reception and banquet.

Direction to Stanford and Campus map can be found at

If you need any further information, please let us know.

Organizers: Gene Golub ( and
Zhaojun Bai (


From: Jan Chleboun <>
Date: Fri, 27 Apr 2001 14:50:00 +0200 (CEST)
Subject: Conference in Prague on Differential Equations

Czechoslovak International Conference on Differential Equations
and Their Applications
will be held during August 27-31, 2001 in Prague, Czech Republic.

The conference is concerned with:
ordinary differential equations
partial differential equations
numerical methods and applications

Honorary Presidents: Ivo Babuska, Jaroslav Kurzweil

Due to a favourable exchange rate between US dollar and the local currency
it was possible to extend the deadline for payment of the registration fee
at the lowest rate USD 220 till May 31, 2001 (USD 60 for accompanying

Please note that the Second Announcement is available at

All forms requested can be downloaded there as well.

E-mail address of the conference:

Jan Chleboun
Mathematical Institute
Academy of Sciences
Zitna 25 ( TeX: \v{Z}itn\'a )
115 67 Prague 1
Czech Republic


From: Mischja van Bossum <>
Date: Fri, 27 Apr 2001 15:46:21 +0200 (MET DST)
Subject: Conference in Utrecht on High Performance Optimization Techniques

HPOPT 2001
June 6-8, 2001
Utrecht, The Netherlands

for "program of the conference" and "online registration" see

Aim of the Conference

HPOPT 2001 will focus on duality, algorithms, complexity,
sensitivity, and numerical aspects.

The meeting will consist of a one day tutorial and a two-day
conference. The theme for this meeting is 'Computational
Techniques for Optimization'.

The aim of the workshop is to bring together some of the most
active researchers working on the design and implementation of
optimization algorithms.
Our goal is to cover the latest algorithmic developments, complexity
results and implementation aspects, including the required tools
from numerical algebra. Emphasis will be on exciting developments in
semidefinite optimization.

List of invited speakers

Tino Heijmen (Philips Research Laboratories, Eindhoven, The Netherlands)
Christoph Helmberg ( ZIB, Berlin, Germany)
Dick den Hertog (Tilburg University, Tilburg, The Netherlands)
Tom Kevenaar (Philips Research Laboratories, Eindhoven, The Netherlands)
Monique Laurent (CWI, Amsterdam, The Netherlands)
Francois Oustry (Unite de Recherche INRIA Rhone-Alpes, Montbonnot, France)
Jos Sturm (Maastricht University, Maastricht, The Netherlands)
Philippe Toint (University of Namur (FUNDP), Namur, Belgium)
Margaret Wright (Bell Laboratories, Murray Hill, New Jersey)

Conference Organizers

Henk van der Vorst (Utrecht University)
Gerard Sleijpen (Utrecht University)
Mischja van Bossum (Utrecht University)

Program Committee

Jan Brinkhuis (Erasmus University Rotterdam)
Jan Karel Lenstra (Eindhoven University of Technology and CWI Amsterdam)
Kees Roos (Delft University of Technology)
Gerard Sleijpen (Utrecht University)
Wil Schilders (Philips Research Laboratories, Eindhoven)
Leen Stougie (Eindhoven University of Technology)
Mischja van Bossum (Utrecht University)
Henk van der Vorst (Utrecht University)


The conference will take place at the University of Utrecht
center: "De Uithof"

Conference Website


From: Eric Sonnendrucker <>
Date: Fri, 27 Apr 2001 17:17:51 +0200
Subject: Workshop in Strasbourg on Numerical Simulation of Charged Particles

Workshop on Numerical Simulation of Charged Particles
June 20 and 21, 2001
Strasbourg, France

The aim of this workshop is to bring together applied mathematicians,
physicists and computer scientists interested in aspects of the
simulation of charged particles.

Two main themes will be discussed this year:
1) Numerical methods for the Vlasov equation
2) Numerical methods for the resolution of Maxwell's equations
in domains with reentrant corners

Further information can be found at


From: Montaz Ali <>
Date: Fri, 20 Apr 2001 17:52:36 +0200 (SAST)
Subject: Faculty Positions at the University of the Witwatersrand

University of the Witwatersrand
Lecturer / Senior Lecturer

Applications are invited for an indefinite Lectureship / Senior
Lectureship in Computational and Applied Mathematics. Candidates will have
a PhD or, in the case of the Lecturership, be completing a PhD. Preference
will be given to candidates whose teaching and research interests are in
one of the following areas: Numerical Analysis, Biomathematics,
Mathematics of Finance, Optimisation and Control Theory, Differential
Equations and Continuum Mechanics, Image Processing, Mathematical
Modelling. Applicants who would take a special interest in the teaching
and administration of service courses given by the School of Computational
and Applied Mathematics to students in Architecture, Engineering, Commerce
and Health Sciences will also be considered.

SALARY: Dependent on qualifications, experience and level of appointment.

Chair of Computational Mathematics

Applications are invited for the above Chair. The School of Computational
and Applied Mathematics wishes to redress an imbalance in its academic
focus, brought about by the appointment of the current Chair of
Computational and Applied Mathematics to Dean of the Faculty of Science.
The new Chair will lead the development of the computational component of
research and teaching in the School while the existing Chair of Applied
Mathematics will lead the analytical component.

The successful candidate will have a PhD. He or she will be a strong and
currently productive researcher within the field of computational
mathematics, able to raise the international profile of the School. Areas
of interest in the School include numerical analysis, differential
equations, continuum mechanics, biomathematics, mathematics of finance,
mathematics in industry, image processing, optimisation and control and
mathematical modelling. The applicant will have a proven ability to
attract postgraduate students. He or she will be willing to lecture to
Honours students and will take a critical interest in undergraduate course

The School has a formal management structure and is able to offer the
successful candidate the opportunity to significantly bias duties towards
research and teaching. Participation in administrative duties is welcomed
if the candidate so desires.

A start-up research grant is available. * The School has a commitment to
build on its strengths and can make an appointment at Lecturer/Senior
Lecturer level in conjunction with the Chair. * The School will provide
the opportunity for short-listed applicants to visit and assess a vibrant
university community that is rebuilding after democratization in South
Africa. * The salary offered is negotiable. Additional benefits include
contributions to the provident fund, an annual bonus, generous leave,
medical aid, housing subsidy (if eligible), relocation allowance, 100%
financial assistance of dependent's university studies (if applicable).

Enquiries: Dr M Ali, tel: (27)(11) 717-6139, fax: (27)(11) 403-9317,
e-mail: An information statement is available from
the Personnel Officer (address below) or from our website:

To apply, submit a detailed CV with the names, addresses and contact
numbers of three referees and certified copies of degrees / diplomas to:
Ms Kalpana Patel, Human Resources Manager, Faculty of Science, University
of the Witwatersrand, Private Bag 3, Wits 2050, Johannesburg, South

CLOSING DATES: 30 May 2001


From: J. Levesley <>
Date: Wed, 25 Apr 2001 09:44:38 +0100 (BST)
Subject: Lectureship Position at University of Leicester


We are currently advertising for a four year Lectureship in Mathematics.
Please bring the following information to the attention of anyone who
may be interested.

Applications are invited for a four year Lectureship in Mathematics, available
from 1st September 2001 in a young, exciting and growing department. Applicants
should have teaching experience and also have a strong research record.
Candidates are encouraged from all areas of the subject, though preference may
be given to applicants whose research is in one of the following areas:
differential equations, functional analysis, differential geometry, biological

Salary will be on the Lecturer A scale, 18,731-23,256 pounds per annum.

Informal enquiries may be made to Prof S. Koenig ( or
Prof B. Leimkuhler (
Department information is available at

Full particulars and application forms are available either from the above
website, the University of Leicester job website
( or directly from Personnel, University of

Leicester, University Road, Leicester LE1 7RH, UK (tel +44 (0) 116 252 5114,
fax +44 (0) 116 252 5140, email, quoting reference A5420.

Closing date for applications: 18th May 2001

April 2001


From: Des Higham <>
Date: Fri, 27 Apr 2001 11:04:33 +0100 (BST)
Subject: Lectureships at University of Strathclyde

Two Lectureships in Applied Mathematics are available in the Department
of Mathematics at the University of Strathclyde, Scotland, UK.
One is a a permanent post, and the other is initially a
two year position. Current research interests in the department
include numerical analysis, industrial mathematics, applied
analysis and continuum mechanics (including liquid crystal theory).

for further details.

Closing date for applications is May 11th, 2001.


From: Ke Chen <>
Date: Thu, 26 Apr 2001 23:36:52 -0700 (PDT)
Subject: Postdoctoral Position at University of Liverpool

The University of Liverpool, UK
Department of Mathematical Sciences ---- 3-year post-doctoral post

"Fast Iterative Solvers with Wavelets and Multiscale Methods"

The Department has an opening for a postdoctoral position for
a period of 3 years commencing June 1, 2001. The proposed
project will investigate and develop fast wavelet algorithms
for iterative solution of a class of differential and integral
equations arising from practical applications. The funding comes
from a recent award from the UK research council EPSRC. There is
no restriction on candidates' nationality. The University is
committed to equal opportunities. The salary will be on RA1A scale.

Applicants who possess, or expect to soon obtain, a PhD degree in
mathematics related areas and have backgrounds in Applied Mathematics,
Computer Science, and strong background in numerical analysis,
knowledge of wavelets, and good computational skills are
encouraged to apply. Knowledge of parallel computing is not
essential as training will be given. The successful candidate will
have an opportunity to interact with our industrial partners.

Further details are available from
Application including a full CV and the contact details (email
address, fax no) of 2-3 referees may be sent to me
by email or to the University personnel office asap:

Ke Chen,
Division of Applied Mathematics,
Department of Mathematical Sciences,
The University of Liverpool,
Peach Street, Liverpool L69 7ZL, U.K.
Fax: (+44) 0151 794 4061


From: Stefan Vandewalle <>
Date: Fri, 27 Apr 2001 17:51:04 +0200
Subject: Postdoctoral Positions at K. U. Leuven

Post-doctoral positions on Scientific Computing at K.U.Leuven

The research group Scientific Computing of the department of Computer Science,
K.U.Leuven, Belgium, has two vacancies for postdoctoral researchers on the
project `Computational Mathematics in Bio-processes'. This project is a
collaboration with two research teams working on biological process engineering
(microbial conversion, food production and processing).
We look for 2 postdoctoral researchers to work on the following topics:

* Multilevel iterative solvers for systems of 3D reaction-diffusion equations

To extend their postharvest storage life, fruits are often stored under
controlled conditions to decrease their respiratory activity. When the oxygen
concentration is too low, or when the carbon dioxyde concentration is too high,
a fermentative metabolism is induced which may lead to severe tissue damage.
A generic model for this phenomenon consists of metabolic network models for
the respiratory pathways, transport models for gasses and moisture inside the
fruit, and a model to track the moving interface between damaged and undamaged
tissue. Simulations using this model require methods to solve systems of
reaction-diffusion equations, defined on complex 3D-domains, extended with an
internal interface tracking equation. This project will concentrate on the
numerical aspects and the development of fast solvers, based, e.g., on
multilevel and domain decomposition ideas.

* Simulation, reduced-order modeling and control for reaction-convection-
diffusion equations and conservation laws with turbulence- and sedimentation

The simulation of complex bio-reactor processes is based on coupled reaction-
convection-diffusion equations (with strong convection) with bio-chemical
reactions, and the equations for (usually turbulent) fluid flow with simple
models for sedimentation. The aim is to develop accurate numerical methods
for steady-state computation and time simulation of these equations. Since
these models are often too complex to be exploited in model-based process
design and control, model reduction techniques for PDE-based control will
be studied.

The candidates should have a good background in scientific computing. The
positions are intended for post-doctoral researchers and they are available
for 1 year, starting as soon as possible, and with the possibility of an
extension. More information about the research group can be found at

Interested candidates should send their C.V. to :

Prof. D. Roose or Prof. S. Vandewalle
Dept. Computer Science, K.U.Leuven
Celestijnenlaan 200A, B-3001 Leuven, Belgium
Phone: + 32-16-32 75 46 Fax: + 32-16-32 79 96


From: I. J. Anderson <>
Date: Fri, 27 Apr 2001 13:50:39 +0100 (BST)
Subject: Studentship at University of Huddersfield


An excellent PhD opportunity is available for a good
mathematically related graduate, or MSc student, preferably with
experience in numerical analysis (NA) or approximation theory and
computing, to work with Prof. J.C. Mason / Dr I.J. Anderson in a thriving
NA research group in Huddersfield in association with Edward Lynch,
Professor of Restorative Dentistry at Queen's University, Belfast.
Prof. Lynch is affiliated to the London School of Dentistry and consultant
to the co-operating body Natural White (an international manufacturer of
dyes and toothpaste - with UK base in London).

The CASE project involves developing new approximation algorithms and
metrics to model plaque and surface changes to teeth, including the
effective fusion of data taken from multi-angle scans with measuring
devices. The group has excellent facilities in an award-winning,
renovated 1865 textile mill, and the (UK resident) stipend is at least
#9,800 p.a. (+ possible age/dependancy allowances).

For full details, contact (email) or or (phone) 01484-472680 or 01484-472927 leaving
phone number, apply a.s.a.p. by sending a short CV plus two academic
referee names, and suggest early dates for a possible interview. A
nomination is needed as soon as is feasible for a start between now and
October 2001.

Address for correspondence:
Prof. John Mason
School of Computing and Mathematics
University of Huddersfield


From: Lothar Reichel <>
Date: Sun, 29 Apr 2001 01:18:01 -0400 (EDT)
Subject: Contents, Electronic Transactions on Numerical Analysis

Table of Contents, Electronic Transactions on Numerical Analysis (ETNA),
vol. 11, 2000. ETNA is available at and several
mirror sites as well as on CDROM.

A. Toselli, Neumann-Neumann methods for vector field problems, pp. 1-24.

M. A. Cawood and C. L. Cox, Perturbation analysis for eigenstructure
assignment of linear multi-input systems, pp. 25-42.

B. I. Wohlmuth, A multigrid method for saddle point problems arising from
mortar finite element discretizations, pp. 43-54.

S. Serra Capizzano and C. Tablino Possio, High-order finite difference
schemes and Toeplitz based preconditioners for elliptic problems,
pp. 55-84.

P. Benner, R. Byers, H. Fassbender, V. Mehrmann, and D. Watkins,
Cholesky-like factorizations of skew-symmetric matrices, pp. 85-93.

K. Atkinson, D. D.-K. Chien and J. Seol, Numerical analysis of the
radiosity equation using the collocation method, pp. 94-120.

R. Gutie'rrez J. Rodriguez, and A. J. Sa'ez, Approximation of
hypergeometric functions with matricial argument through their
development in series of zonal polynomials, pp. 121-130.

C. T. H. Baker and E. Buckwar, Continuous Theta-methods for the
stochastic pantograph equation, pp. 131-151.

Publication of volume 12 of ETNA is in progress. Presently the following
papers are available:

G. Meurant, Numerical experiments with algebraic multilevel
preconditioners, pp. 1-65.

H. Zhang, Numerical condition of polynomials in different forms,
pp. 66-87.

M. J. Castel, V. Migallo'n, and J. Penade's, On parallel two-stage methods
for Hermitian positive definite matrices with applications to
preconditioning, pp. 88-112.


From: CMAM <>
Date: Thu, 26 Apr 2001 09:50:42 +0200
Subject: Contents, Computational Methods in Applied Mathematics

Dear colleagues,
We are pleased to inform you about the beginning of the publication
the new international journal&nbsp;&nbsp; COMPUTATIONAL METHODS IN APPLIED
The journal Computational Methods in Applied Mathematics (CMAM) publishes
original research articles on numerical methods and their applications
to science and engineering. Subject areas include initial and boundary
value problems for ordinary and partial differential equations, integral
equations appearing in applied mathematics and mathematical physics. Theoretical
contributions/analysis, numerical algorithms and computer simulations will
be also within the scope of the journal. The journal will also concentrate
on the interaction between different fields of applied mathematics. In
this connection the journal will appreciate papers for publication.
>Vol. 1, No. 1, 2001, pp. 1-112
1) Resolvent Estimates in $l_p$ for Discrete Laplacians on Irregular
Meshes and Maximum-Norm Stability of Parabolic Finite Difference Schemes
M.Crouzeix (France), V.Thomee (Sweden), 3-17

2) Pointwise a Posteriori Error Analysis for an Adaptive Penalty Finite
Element Method for the Obstacle Problem
D.A.French (USA), S.Larsson (Sweden), R.H.Nochetto (USA), 18-38

3) Integral Equations of the Linear Sloshing in an Infinite Chute and
Their Discretization
I.P.Gavrilyuk (Germany), A.B.Kulyk (Ukraine), V.L. Makarov (Ukraine), 39-61

4) Difference Schemes with Nonlocal Boundary Conditions
A.V.Goolin (Russia), N.I.Ionkin (Russia), V.A.Morozova (Russia), 62-71

5) On the Strong Stability of Operator-Difference Schemes in Time Integral
B.S.Jovanovic (Yugoslavia), P.P.Matus (Belarus), 72-85

6) Solution of Time-Dependent Advection-Diffusion Problems with the
Sparse-Grid Combination Technique and a Rosenbrock Solver
B.Lastrager (The Netherlands), B.Koren (The Netherlands), J.Verwer
(The Netherlands), 86-98

7) Multigrid for the Wilson Mortar Element Method
Zh.-C. Shi (China) X. Xu (China), 99-112

During the first year the journal will be available at our home page:
For information to contributors and about subscription see:

Best regards,
Managing editor
11 Surganov st.,220072 Minsk


From: Corry Magrijn <>
Date: Fri, 27 Apr 2001 11:06:55 +0200
Subject: Contents, Mathematics of Control, Signals, and Systems

Mathematics of Control, Signals, and Systems (MCSS)
Volume 14 (2001), Number 1

F. Albertini, P. Dai Pra and C. Prior
Small parameter limit for ergodic,
discrete-time, partially observed,
risk-sensitive control problems.<BR>
MCSS 14 (2001), 1-28.

P. Kunkel, V. Mehrmann and W. Rath,
Analyses and numerical solution
of control problems in descriptor
MCSS 14 (2001), 29-61.

M. Boue and P. Dupuis,
Risk-sensitive and robust escape
control for degenerate processes.<BR>
MCSS 14 (2001), 62-85.

R. Banning and W.L. de Koning,
Spectral analysis of stochastically
sampled dynamic systems.<BR>
MCSS 14 (2001), 86-107.


End of NA Digest