NA Digest Sunday, June 20, 1999 Volume 99 : Issue 25

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: Roberto Brambilla <>
Date: Mon, 14 Jun 1999 12:05:17 +0200
Subject: Numerical Dual Integral Equations

In modelling the melting effect of lightning on a metal surface,
I had to solve the following typical problem:
A semi-infinite homogeneous solid, at constant temperature T=0,
at time t=0 is suddendly heathed on its free surface, z=0, by
a disk (radius a), at constant temperature T=To, the remaining part of
surface supposed to be thermally insulated (i.e. no heath flux). This
is a mixed-boudary value problem.
The steady state solution, t->infinity, can be found in standard text
(Carlaw-Jaeger, CHS, cap.8, p.215,eq.(9)) and is



I have found a time depending solution using Laplce transform and Hankel
transform to eliminate time and radial dependence in heath equation. In
this way the problem, with the prescribed boundary value, is reduced to a
couple of dual integral equations. These equations can be solved
numerically by series of Bessel functions, as done by Sommerfeld (Ann.der
Physik (1942/43) ,42, pag. 395).
The major difficulty are now in the inverse transformations which look
almost prohibitive.
This very elementary problem has a very complex solution.
Anyone knows other simpler methods or references to analogous
situations with dual integral equations?
Any help will be greatly appreciated.

Dott. Roberto Brambilla
Via A.Volta, 1
20093 Cologno Monzese (MI)
tel +39.2.7224.5364
fax +39.2.7224.5465


From: Warren MacEvoy <>
Date: Mon, 14 Jun 1999 21:37:10 -0700
Subject: Roots of Convex Functions

Dear NA-netters,

I would like to find the *roots* of a family of convex functions. That is
f_k(x_1,...,x_n) = 0 for k=1..n, where each f_k(x) is convex. Is anyone
aware of an algorithm guaranteed to work (or prove no roots exist) in
this case?

The two forms of f_k(x) I am specifically interested in are

f_k(x) = max_{1 \leq j \leq n_k} (m_{kj} \cdot x + b_{kj})

[ so f_k is the maximum over a finite family of linear functions ]

which is really just an approximation for

f_k(x) = log[ sum_{j=1}^{n_k} \exp (m_{kj} \cdot x + b_{kj}) ]

[ so f_k is the log of the sum of the exponentials of linear functions ]


From: Amir Borji <>
Date: Tue, 15 Jun 1999 13:44:49 -0400 (EDT)
Subject: Consecutive Zeros of Bessel Type Functions

Hi everyone,

Does anybody have (or knows) a routine for finding
the consecutive zeros of bessel type functions

I mean, e.g., finding 'THE FIRST n ZEROS' of
J0(x) or J0(x)*Y0(ax)-J0(ax)*Y0(x) or other similar
functions with a good accuracy!

Amir Borji
Department of Electrical and Computer Engineering
University of Waterloo
Waterloo, Ontario
Canada N2L 3G1

Office : DC2551E
Phone : (519) 888-4567 Ext: 6615
email :


From: (Jean Claude Berges)
Date: Fri, 18 Jun 99 17:08:44 +0200
Subject: Algorithms for Arbitrary Precision Floating Point Arithmetic

Dear NA-Netters,

For an application of embedded onboard satellite'software, I will wish
to locally increase the floating point precision of the four basic
operations available on my processor ( MIL-STD-1750 with extended floating
point data : 48 bit consisting of a 40-bit 2'complement mantissa and an
8-bit 2'complement exponent).
I seek algorithms which use only one fixed precision (the extended
floating point precision) available on my processor (as the algo. for
arbitrary precision floating arithmetic of Douglas D.Priest- Preprint 1992)
and not algorithms which are based on libraries as MP (A FORTRAN Multiple
Precision arithmetic Package) of Richard P. Brent, ....

If you have some information (preprints, freeware, .... ) for my
problem, please let me know. Any reference would be helpful.


Jean Claude BERGES
French Space Center ( DTS/MPI/MS/MN)
18,Av. Edouard Belin
31401 TOULOUSE Cedex 04 - FRANCE

E-mail :


From: Timur Linde <>
Date: Fri, 18 Jun 1999 22:25:40 -0500
Subject: Monte Carlo Codes for Boltzmann Equation

Dear NA-Netters,

Does anybody know if there is anywhere a publicly available
three-dimensional (parallel?) Monte Carlo code that solves
the kinetic Boltzmann equation in a box?

Timur Linde


From: Dominique Chapelle <>
Date: Tue, 15 Jun 1999 19:07:16 +0200
Subject: MODULEF Free Software

It is my great pleasure to inform the NA-community that MODULEF (the
modular finite element library developed by INRIA and other
contributors) has now become a free software. The free distribution is
made available by INRIA, and can be downloaded from the MODULEF web site:
(this site will open on June 21st).

Any questions regarding MODULEF can be directed to

Dominique Chapelle


From: Alan Harvey <aharvey@CUP.Stanford.EDU>
Date: Sat, 19 Jun 1999 10:51:34 -0700 (PDT)
Subject: New Book, Level Set Methods and Fast Marching Methods

I am pleased to announce the publication of a new book, entitled

"Level Set Methods and Fast Marching Methods"
J.A. Sethian
published by Cambridge University Press

This book provides an introduction to level set methods and fast marching
methods, which are powerful numerical techniques for analyzing and computing
interface motion in a host of settings. They rely on a fundamental shift in
how one views moving boundaries, rethinking the natural Lagrangian perspective
and exchanging it for an Eulerian, initial value partial differential equation
perspective. The resulting numerical techniques can be used to track three-
dimensional complex fronts that can develop sharp corners and change topology
as they evolve.

This new edition is a superset of the earlier book, "Level Set Methods",
published in 1996, in that it contains everything in the previous edition, as
well as a collection of new topics, including:

(1) Level set and Fast Marching Methods on unstructured meshes,
(2) General and automatic coupling of interface techniques to
complex physics and chemistry, methods.
(3) Methods which provide high order accuracy, conserve mass,
and avoid all re-initialization, including scheme error analysis.
(4) New application areas, including: Sintering and flow under the
second derivative of curvature, shape smoothing and image
processing/segmentation, fast techniques for computing visibility
in complex scenes, semiconductor simulations and comparison with
experiment, construction of shortest geodesic paths,
connections with network path algorithms, electromigration,
fluid mechanics, aircraft avoidance, control theory, and

This new edition is available in both hardback and paperback.

Published June 1999, 398 pages
ISBNs 0 521 64204 3 HB
0 521 64557 3 PB

For more information, please see the Cambridge University Press online
catalogs at and

The first chapter may be downloaded from the website:

An accompanying web site has beed developed devoted to these topics,
which includes

(1) Interactive Java scripts on robotic navigation, medical image
segmentation, image processing, and curve evolution,
(2) A large number of movies about fluids, semiconductors, geometry,
imaging, segmentation, etc.,
(3) The history and evolution of this field, with reference material,
and downloadable papers.

The address of the web site is


From: Ali Sayed <>
Date: Thu, 17 Jun 1999 10:33:43 -0700
Subject: New Book, Indefinite Quadratic Estimation and Control

A Unified Approach to H_2 and H_oo Theories

B. Hassibi, A. H. Sayed, and T. Kailath

Studies in Applied Mathematics, vol. 16,
SIAM, PA. Hardcover. xvii+555 pages.
ISBN 0-89871-411-7.


This monograph presents a unified mathematical framework
for a wide range of problems in estimation and control.
The authors discuss two most commonly used methodologies:
the stochastic H_2 approach and the deterministic (worst-
case) H_oo approach. Despite the fundamental differences
in the philosophies of these two approaches, the authors
have discovered that, if indefinite metric spaces are
considered, they can be treated in the same way, and are
essentially the same. The benefits and consequences of
this unification are pursued in detail, with discussions
of how to generalize well-known results from H_2 theory
to the H_oo setting, as well as new results and insights,
the development of new algorithms, and applications to
adaptive signal processing.

Table of Contents:

1. Introduction and Motivation
2. Linear Estimation in Krein Spaces
3. State-Space Models in Krein Space
4. Finite Horizon H_oo Filtering
5. Array Algorithms
6. Several Related Problems
7. H_oo Optimality of the LMS Algorithm
8. Duality
9. Finite-Horizon Control Problems
10. Input-Output Approach to H_2 and H_oo Estimation
11. Input-Output Approach to H_2 and H_oo Control
12. The Discrete-Time Algebraic Riccati Equation
13. Infinite-Horizon Results for State-Space Models
14. Asymptotic Behavior
15. Optimal H_oo Solutions
16. Continuous-Time Results and Final Remarks



Written for the second-year graduate student in electrical,
mechanical, or aerospace engineering, the book requires a
basic understanding of linear algebra and linear systems
theory. Researchers in systems and control, signal
processing, communications, and numerical algorithm
development will also find this book useful.

About the Authors:

B. Hassibi is with Bell Laboratories, Murray Hill, NJ.
A. H. Sayed is Associate Prof. of Electrical Eng., UCLA
T. Kailath is Hitachi America Prof. of Eng., Stanford Univ.


From: Pasi Tarvainen <>
Date: Tue, 15 Jun 1999 11:58:20 +0300 (EEST)
Subject: Change of Address for Pasi Tarvainen

Hello, my new coordinates are:

Dr. Pasi Tarvainen
Numerola Oy
Vainonkatu 11A
FIN-40100 Jyvaskyla

tel. +358 14 678793
+358 40 7477986
fax +358 14 678794

Regards, Pasi


From: Jack Dongarra <>
Date: Mon, 14 Jun 1999 12:16:47 +0200
Subject: Meeting Honoring Cleve Moler

Meeting in honor of Cleve Moler's Birthday

Cleve Moler will be 60 in August 1999, and we are planning a one-day
meeting on Saturday October 9, 1999 to honor the occasion.

The meeting will take place at MathWorks new headquarters in Natick,
Massachusetts, about 30 minutes from Boston by car. It will consist of
informal talks addressing Cleve's impact on various areas of research,
his unique style of interacting with people, anecdotes, a survey of
areas where he has had an impact, etc.

The list of invited speakers follows:
Tom Coleman, Cornell University
Germund Dahlquist, KTH Sweden
Jack Dongarra, University of Tennessee/ORNL
Alan Edelman, MIT
Stan Eisenstat, Yale University
Walter Gander, ETH, Zurich
Joe Hicklin, The MathWorks
Nick Higham, Manchester University
Chuck Lawson, JPL
Jack Little, The MathWorks
Bill McKeeman, DEC/Compaq
Kathryn Ann (KAM) Moler, Stanford
Rob Schreiber, HP Lab
Larry Shampine, Southern Methodist University
Pete Stewart, U of Maryland
Gil Strang, MIT
Nick Trefethen, Oxford University
Charlie Van Loan, Cornell University
Margaret Wright, Lucent Technologies

The event will begin with a reception hosted by the MathWorks on Friday
October 8th and end with a banquet on Saturday from 6:00 - 10:00.

For addition information on the meeting and to register see:

We hope to see you there!

With best wishes,
Jack Dongarra
Gene Golub
Jack Little
Charlie van Loan


From: Hans Joachim Werner <>
Date: Wed, 16 Jun 99 19:41:16 +0100
Subject: Conference Honoring C. R. Rao

First Announcement
The Ninth International Workshop on
Matrices and Statistics
In Celebration of C. R. Rao's 80th birthday

9--13 Dec 2000, Hyderabad, India

The Ninth International Workshop on Matrices and
Statistics, in Celebration of C. R. Rao's 80th Birthday,
will be held in the historic city of Hyderabad, in Andhra Pradesh,
India, on December 9--13, 2000. The program will start with a
two-day short course on recent advances in Matrix Theory, with
Special Reference to Applications in Statistics, on Saturday,
December 9, and Sunday, December 10, 2000. This will be followed
by presentation of research papers for the next three days; these
papers may then be submitted for publication in a refereed
professional research journal.

There will be a number of invited and contributed papers sessions.

Organizing Committees

R. W. Farebrother, S. Puntanen (vice-chair),
G. P. H. Styan, H. J. Werner (chair).

R. Bhatia, P. Bhimasankaram, V. Narayana, M. Sudhakar Rao,
B. G. Sidharth, U. Suryaprakash, R. J. R. Swamy, P. Udayasree,
K. Viswanath.

Registration fee is US$60 (regular) and $30 (for students and retired
persons) for the Workshop, and $10 for the banquet. The fee for the
short course is $25.

Information about the scientific program can be obtained from:

P. Bhimasankaram:,
S. Puntanen:
K. Viswanath:
H. J. Werner:

Information about registration, deadline for submission of papers and
local accommodation can be obtained from:

P. Bhimasankaram:,
B. Sidharth:
R. J. R. Swamy:
K. Viswanath:


From: David Harrar II <>
Date: Thu, 17 Jun 1999 07:18:08 +1000 (EST)
Subject: Symposium Honoring Mike Osborne

First announcement and call for participation

Symposium Honoring the Contributions of
Mike Osborne
to Computational Mathematics
(and his 65th birthday)

17-18 September 1999
Australian National University
Canberra, ACT, Australia

This Symposium is in honor of Prof. Mike Osborne's ubiquitous
contributions to diverse areas of computational mathematics including
(but not limited to!) differential equations, approximation theory,
integral equations, statistical computing, linear and nonlinear
optimisation, and high performance computing.

The Symposium program will comprise a day and a half of talks,
both technical and anecdotal, of roughly 30-45 minutes duration
(speaker's choice!). The Symposium will commence on Friday 17 September
and end around lunchtime on Saturday 18 September. It is expected that
some sort of bush outing will be organized for either Saturday afternoon
or Sunday. There will be a Symposium Dinner on Friday evening. (For
all of those ex-students, ex-post-docs, colleagues, as well as friends
out there here's your chance to get that elusive "last word" with Mike!)

Thus far, the following have indicated that they are likely to attend
and (tentatively) give presentations:

Les Jennings Univ Western Australia
Frank De Hoog CSIRO
Andreas Griewank Tech Univ Dresden
David Harrar II ANU
Markus Hegland ANU
Zhengfeng Li ANU
Tania Prvan Univ Canberra
David Ryan Univ Auckland
Ian Sloan Univ Sydney
Weiwei Sun City Univ HK
Jim Taylor Aust Dept Defence
Alistair Watson Univ Dundee
Rod Weber ADFA

A more complete list will be maintained on the Symposium webpages as
further responses are received.

The dates for the Symposium have been chosen so as to enable
delegates also to attend The 9th Biennial Computational Techniques
and Applications Conference and Workshops (CTAC99) to be held 20-24
September 1999 also at the Australian National University. Attendees
of the Symposium are encouraged to consider attending the conference
and/or the workshops. For further information, see the CTAC99
webpages at:

For further information check out the Symposium webpages:

This site will be updated continuously as further information on the
Symposium becomes available.

The Organising Committee members and their e-mail addresses are:

David Harrar II (ANU) (
David Ryan (U Auckland) (
Rod Weber (ADFA) (

Most questions can probably be answered by consulting the Symposium
webpages. However, if you have urgent questions please contact one
of the organisers at the above e-mail addresses. (Note: Each of the
organisers is away for some period during July/August; please consult
the webpages to determine whom to contact during a given period.)

Sponsored by: The Centre for Mathematics and its Applications and
the School of Mathematical Sciences at the Australian National University
and the ACT Branch of ANZIAM (Australia and New Zealand Industrial and
Applied Mathematics society).


From: Plamen Yalamov <>
Date: Tue, 15 Jun 1999 10:08:44 +0300 (WET)
Subject: Numerical Analysis Conference in Bulgaria

June 11-15, 2000
University of Rousse, Rousse, Bulgaria

This conference is second in a series. The first one (organized
in-cooperation with SIAM) was held in June 24-28, 1996 at the University
of Rousse. There were more than 80 participants from 22 countries all over
the world. In addition to more than 30 participants from Bulgaria, about
20 participants were from Eastern European countries. In this way the
meeting turned out to be a good place for exchange of ideas between East
and West. The refereed proceedings of the first meeting were published by
Spinger Verlag in the Lecture Notes in Computer Science series (vol.

We intend to make these meetings a recurring event meshing with other
conferences organized in Bulgaria.

The main tracks of the conference are:

1. Numerical Linear Algebra.
2. Numerical Methods for Differential Equations.
3. Numerical Modeling.
4. High Performance Scientific Computing.

The preliminary list of Keynote Speakers who accepted our invitation:

G. Akrivis (Greece), V. B. Andreev (Russia), R. Chan (Hong Kong),
F. Chatelin (France), I. Duff (UK), R. Freund (USA), A. V. Goolin
(Russia), A. Griewank (Germany), P. C. Hansen (Denmark), P. W. Hemker
(Netherlands), B. Jovanovich (Yugoslavia), Yu. A. Kuznecov (USA - Russia),
R. D. Lazarov (USA - Bulgaria), F. Luk (USA), J. J. Miller (Ireland),
H. G. Roos (Germany), V. V. Shaidurov (Russia), G. I. Shishkin (Russia),
E. E. Tyrtyshnikov (Russia), P. N. Vabishchevich (Russia)

Marcin Paprzycki (
Lubin Vulkov (
Plamen Yalamov (

You can find more information on our WWW sites:


From: Volker John <>
Date: Tue, 15 Jun 1999 19:27:47 +0200 (METDST)
Subject: Workshop on Transport Dominated Differential Equations

Second announcement:

International Conference on Numerical Methods
for Transport-Dominated and Related Problems

This International Workshop on analytical and numerical methods for
convection-dominated differential equations will be organized in
cooperation with the GAMM Committees ``Efficient numerical methods for pde''
and ``Scientific computing''. It will provide a forum for communication
and interaction between applied mathematicians, numerical analysts
and the scientific computing community.

Date: 20 -- 23 September 1999

Location: Schloss Wendgr\"aben, near Magdeburg, Germany

Conference themes:
- Discretization techniques ---
FDM/FEM/FVM/spectral methods/collocation methods
- Solution of the discrete algebraic problems ---
multigrid/domain decomposition/parallelization
- Analytical approaches ---
asymptotic expansions/Shishkin-type decompositions
- Error estimates and adaptive approaches
- Modelling and applications

Plenary speakers:
V.F. Butuzov (Moscow),
C. Canuto (Torino),
P.W. Hemker (Amsterdam),
R.B. Kellogg (Maryland),
G. Lube (G\"ottingen),
R. Rannacher (Heidelberg),
H.-G. Roos (Dresden),
G.I. Shishkin (Ekaterinburg),
E. S\"uli (Oxford),
R. Verf\"urth (Bochum),
P. Wesseling (Delft)

Organizing committee:
Lutz Tobiska (Magdeburg),
Martin Stynes (Cork, Ireland),
Lutz Angermann (Magdeburg),
Volker John (Magdeburg)

Conference proceedings:
The conference proceedings will be published as a special issue of
``Computing''. Articles will be collected after the conference, not later
than 26 November 1999. All submitted papers will be reviewed in the
standard way.

Contributed papers:
Abstracts (in Tex or Latex) should be submitted by
16 July 1999 to our email address below.
Presentations can be in lecture or poster format.
No parallel sessions will be timetabled at the conference,
so the number of contributed lectures is limited.

Dates to remember:
- Deadline for abstracts and registration: 16 July 1999
- Deadline for submission of manuscripts: 26 November 1999
- Notification of acceptance or rejection: 28 January 2000
- Final deadline for submission of revised manuscript: 31 March 2000

The registration fee will be approximately 80 DM. This includes the volume of
abstracts, coffee breaks and reception.
Please send the registration form to the address below
or register on-line at our Conference website; in both cases, the
deadline for registration is 16 July 1999.

The conference will take place in the historical castle
of Wendgr\"aben, which provides full-board lodging.
The price of a double/single room is about 140/165 DM
per night (meals included).

Conference website:


From: Trini Flores <>
Date: Wed, 16 Jun 99 11:36:33 -0500
Subject: SIAM Conference on Geometric Design

Sixth SIAM Conference on Geometric Design
Short Course on Applications of Classical Geometry in Computer-Aided Design

November 2-6, 1999
Sheraton Old Town Hotel
Albuquerque, New Mexico

The technical program and information on hotel, transportation, and
registrations for both conference and short course are now available on
the Web. Please visit the conference Web page at


From: Martin Groetschel <>
Date: Sat, 19 Jun 1999 23:15:25 +0200 (MET DST)
Subject: Workshop on the Future of Mathematical Communication

The Future of Mathematical Communication, 1999
Mathematical Sciences Research Institute
Berkeley, California, USA
December 2-5, 1999

This is the first announcement for a workshop on the probable evolution of
mathematical communication in coming years. It is presently sponsored by

- the International Mathematical Union (IMU)
- the Mathematical Sciences Research Institute (MSRI)
- the Centre de Recherches Mathematiques (CRM)
- the Fields Institute (FI)
- the Pacific Institute for the Mathematical Sciences (PIMS)

The workshop will take place almost exactly five years after the 1994
MSRI meeting on "The Future of Mathematical Communication"
( and is intended to
provide a snapshot at the start of the millennium of the present state of
mathematical communication and a provocative look at the future - from
various perspectives and engaging diverse stake-holder groups. It is
hoped that this will provide a useful precursor to world-wide mathematical
activities in the World Mathematical Year, WMY 2000, as the IMU has
designated the year 2000.

The workshop will be preceded by a half-day training workshop on the
use of streaming video, and followed by a day of working sessions of
the IMU's Committee on Electronic Information and Communication (CEIC).

A limited amount of funding is available for partial support of people
wishing to attend. Students, recent Ph.D.'s, women, and minorities are
particularly encouraged to apply. To apply for funding, send a letter
explaining your interest in the workshop together with a vita or
bibliography, estimated travel and/or living expenses. If you are
a student, also solicit a letter from a faculty advisor. This
information should be sent to one of the co-chairs of the conference.

- Dec 2 (Thursday): Streaming video workshop in the morning, as
well as registration, followed by four afternoon talks, on the
UC Berkeley campus, aimed at a very general audience. There will
be a banquet in the evening.

- Dec 3 (Friday): A day devoted to "publishing" broadly construed and
aiming for four morning talks and four afternoon talks addressing
issues such as: preprint servers, journals, books, subscription
models, intellectual property and copyright.

- Dec 4 (Saturday): A day devoted to "tools" of various sorts and again
aiming at four morning and four afternoon presentations, addressing
issues such as: protocols and languages for scientific communication,
meta-data and search mechanisms, multi-media, interactive tools,
computational packages, real time and asynchronous tools for

- Dec 5 (Sunday): The IMU's Committee on Electronic Information and
Communication} (CEIC) will hold a day of working sessions and
invites participants at the workshop to attend.

The Scientific Committee of the conference is:

- (Francois Bergeron, CRM)
- (Jonathan Borwein, PIMS & CEIC (co-chair))
- (Joe Buhler, MSRI (co-chair))
- (Bradd Hart, FI)
- (Martin Groetschel, IMU & CEIC)
- (Peter Michor, EMS & CEIC)
- (Andrew Odlyzko)

The precise schedule is still somewhat in flux, and it is possible that
there will be room for contributed papers; if you are interested in
speaking at the conference, please contact one of the co-chairs.


From: Nikitas Assimakopoulos <>
Date: Wed, 16 Jun 1999 14:40:40 +0100
Subject: Journal of Applied Systems Studies

Methodologies and Applications for Systems Approaches
[ JASS ]


Topics of interest to JASS include :

Applications of interactive planning methodology
Applications of soft systems methodology
Applied cybernetics in medicine
Applied living systems
Applied sociocybernetics
Cognitive patterns
Complex systems
Conceptual systemic models
Control systems
Critical systems thinking
Culture of peace
Decision support systems
Dynamical systems approaches
Electronic service systems (Internet, Intranet, Extranet, Deltanet)
Human-centered systems
Human-computer interaction
Intelligent systems engineering
Intelligent tutoring systems
Knowledge based systems
Law systems
Multimedia systems
Problem structuring approaches
Project management using systemic approaches
Religious systems
Semiotic approaches
Social systems design
Systemic metaphors
Systemic reengineering
Systems - metasystems and decisions - metadecisions
Systems and design education
Systems approaches for information systems
Systems thinking for total quality management
Total systems intervention
Virtual communities

There is no time limit for the submission of papers.


From: Heinz Engl <>
Date: Thu, 17 Jun 1999 15:06:08 +0200
Subject: Faculty Position at Johannes Kepler University

Announcement of a Professorship for Scientific Computing

The College of Science and Engineering of the Johannes Kepler University
in Linz (Austria) advertises a newly created professorship (second salary
category) for Scientific Computing to be filled on or after October 1, 2000.

We are looking for a mathematician with habilitation or equivalent
qualification with a relevant publication record preferably in the area of
geometric analysis in connection with nonlinear partial differential
equations or calculus of variations, especially scientific visualization
Candidates should be able to establish and lead an externally-funded
research group; they should have the necessary pedagogical qualification for
teaching at all levels. Applicants whose research profile fits
into the Special Research Project "Numerical and Symbolic
Scientific Computing" will be preferred; this special research
project deals with the interaction between numerics, symbolics and
graphics in connection with partial differential equations from
science and technology. Especially the areas of graphics and of
software technology for mathematical systems should be strengthened
by this appointment.

The Johannes Kepler University specifically encourages female
candidates to apply, with a view to increasing the proportion of
female professors. Women candidates will be given preference over
equally qualified male applicants.

Applications should be accompanied by a curriculum vitae, list of
publications, teaching record, and copies of five of the
candidate's most important and relevant publications and should be
submitted to Dean Prof. Dr.Heinz W. ENGL, Dekanat der TNF,
Johannes Kepler Universitat Linz, Altenbergerstr. 69, A-4040 Linz,
Austria, no later than Nov. 12, 1999.


From: Michael Patriksson <>
Date: Thu, 17 Jun 1999 21:04:51 +0200
Subject: Student Position at Chalmers University of Technology

PhD student position at Chalmers University of Technology, Gothenburg, Sweden

Department of applied mathematics/optimization

A PhD student position in optimization is offered. The position is
placed at the department of mathematics at Chalmers University of Technology.
The position has its focus within the research project 'Mathematical
models and optimization methods for robust optimal design'.

In the project, design problems in structural mechanics are
considered, wherein the shape, topology and/or material is to be
chosen optimally when parameters in the problem (for example, the
material properties or the external loads acting on the mechanical
structure) are uncertain or vary in a random fashion. What is sought
is a structure that is stable with respect to the random variations of
these parameters, and thus constitutes a form of robust, or,
stochastic, optimization problem of a bilevel (hierarchical) form.

The project is interdisciplinary in that it combines engineering
sciences, in particular structural and solid mechanics, and applied
mathematics, in particular optimization, numerical analysis and
mathematical statistics. The project is performed jointly between the
optimization group at mathematics, and two groups in mechanics at
Chalmers and Linkoping University (Sweden).

The PhD position is limited to 5 years, of which about 20% is devoted
to teaching or other departmental duties. The PhD position comes with
the benefits of a normal job (salary, social security, ...).

Applicants should have an undergraduate degree in an area closely
related to one or more of the project subjects.

The deadline for applications is August 31, 1999.

For more information, please contact associate professor Michael
Patriksson, tel. +46 31 772 3529, e-mail, URL

Complete mailing address for applications:

Section for Mathematics and Computer Science
Chalmers University of Technology
SE-412 96 Gothenburg


From: Alain Curnier <>
Date: Fri, 18 Jun 1999 15:21:47 +0000
Subject: Student Position at EPFL, Lausanne

Ph. D. candidate position in Computational Biomechanics at EPFL, Lausanne,
Switzerland. The laboratory of applied mechanics at the Swiss Federal
Institute of Technology in Lausanne is looking for a Ph.D. candidate in
solid and computational biomechanics. The thesis objective is to formulate a
continuum mechanics viscoelastic model for (tooth) ligament and to implement
it in a finite element code. The candidate should have a Master or a
Diploma in biomechanics, mechanics, physics or applied mathematics and a
drive for numerical analysis. The starting date is August 1, 1999, or later.
The conditions of acceptance are those of the EPFL.

Applications should be directed to :
Prof. Alain CURNIER
LMAF/DGM/EPFL, CH-1015 Lausanne


From: Oleg Burdakov <>
Date: Sat, 19 Jun 1999 18:16:28 +0200 (MET DST)
Subject: Contents, Optimization Methods and Software

Table of Contents
Optimization Methods and Software (OMS)
Volume 10, Number 5 (June, 1999)

M.C. Ferris, A. Meeraus and T.F. Rutherford
Computing Wardropian equilibria in a complementarity framework

J.M. Peng, C. Kanzow and M. Fukushima
A hybrid Josephy-Newton method for solving box constrained variational
inequality problems via the D-gap function

I.V. Konnov
A combined relaxation method for decomposable variational inequalities

B. Christianson
Cheap Newton steps for optimal control problems:
Automatic differentiation and Pantoja's algorithm

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Complete table of contents for the journal OMS, forthcoming papers:


End of NA Digest