NA Digest Monday, January 29, 2001 Volume 01 : Issue 04

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: Tony Chan <>
Date: Tue, 23 Jan 2001 23:55:35 -0800
Subject: Horn's Conjecture Proved

I'd like to alert the readers of NA Digest to a recent proof of a
long standing conjecture in matrix theory. The problem should be a
familiar one to NA Digest readers: what are the possible eigenvalues
of a sum of two Hermitian matrices whose eigenvalues are given?
This seemingly simple and basic question was raised by Hermann Weyl
in 1912 (later formalized as a conjecture by Horn in 1962) and remained open
until it was proved recently by Knutson and Tao. You can read
about the details in the current issue (February) of the Notices of
the AMS. This result has created quite a stir in the math community
and has implications beyond its matrix theory origin.
I note that both Horn and Tao are faculty members in my own department.
As a computational mathematician, I was somewhat surprised that my
"pure" colleagues are interested at all in a basic problem from
matrix theory. The challenge now is whether we can use this new result
in designing better algorithms in matrix computations.

Tony Chan
UCLA Math Dept


From: Michele Benzi <>
Date: Thu, 25 Jan 2001 16:21:19 -0500 (EST)
Subject: Who was Everett Purcell?

Dear NA-netters,

Some of you may be familiar with (or at least have heard of)
a method for solving linear systems Ax=b known as Purcell's
method. This method is closely related to both A-orthogonalization
and Gaussian elimination. Every now and then, papers dealing
with Purcell's algorithm appear; yet, the method does not seem
to be widely known. The original reference is

Purcell, Everett w.: "The vector method of solving simultaneous
linear equations", Journal of Mathematics
and Physics, 32:180--183, 1953.

The paper was reviewed by George Forsythe in "Mathematical Reviews";
Forsythe called the algorithm "a promising new direct method".
He also said that the same method was independently developed in
1953 by T. Motzkin, and the algorithm is sometimes known as the
Purcell-Motzkin method.

A brief sketch of this method can be found in A. S. Householder's
book, "The Theory of Matrices in Numerical Analysis" (see page 142,
Problem 4). Essentially the same algorithm reappeared in 1960 in a
paper by T. Pietrzykowski, and has been rediscovered a number of
times since then.

My question is: Who was Everett W. Purcell?

The paper by Purcell does not give any affiliation for the
author, only a private address (438 North G Street, Oxnard,

A search of the Mathematical Reviews on-line database reveals
only the above paper by this author. Zentralblatt fuer Mathematik
contains also another paper by a E. W. Purcell, listed under

Any clue would be welcome. Maybe some of you old-timers can help?

Michele Benzi
Department of Mathematics and Computer Science
Emory University
Atlanta, GA


From: Kazufumi Ozawa <>
Date: Wed, 24 Jan 2001 18:39:33 +0900
Subject: Airy's function

Does anyone know about any fortran routines to compute Airy's Ai and
Bi functions. My current research interest is in the development of
numerical ODE methods to solve (nearly) periodic IVPs. Using the
method, I intend to solve the equation y''(x)=x y(x), whose solution
is given by Airy's functions.

Thanks in advance,

Kazufumi OZAWA
Graduate School of Information Sciences,
Tohoku University, Japan


From: Sever S. Dragomir <>
Date: Tue, 23 Jan 2001 16:00:11 +1100
Subject: Ostrowski's Inequality and Applications to Numerical Integration

Dear Colleagues,

Some members of RGMIA (Research Group in Mathematical Inequalities &
Applications, ) centered at Victoria University in
Melbourne, Australia, have put together their results on Ostrowski type
integral inequalities and their natural applications on Numerical

For details, please visit

With my personal best regards,

Sever Dragomir


From: Lester Ingber <>
Date: Thu, 25 Jan 2001 14:01:27 -0600
Subject: Parallel Functions for Adaptive Simulated Annealing

Thomas Binder <> has developed auxiliary functions
to support parallelization in the Adaptive Simulated Annealing (ASA) code.
The ASA_PARALLEL option has been in the code since 1994, but until now
it has been up to user to handle specifics of parallelization.

Upon request, Tom will email a version of ASA that includes functions
which can provide an easy-access template for your own applications.

The ASA code may be downloaded from atr no charge.



From: Michel Kern <>
Date: Wed, 24 Jan 2001 17:17:06 +0100
Subject: Modeling and Simulation of Radioactive Waste Storage

To carry out its studies on radioactive waste storage, Andra (the
French National Agency for Radioactive Waste Management) is running a
program on modeling and simulation. In order to choose the best
possible computational tools, it is soliciting the help of the
numerical community and proposes a series of exercises meant to test
different simulation approaches. Couplex is a set of three exercises
that simulate the transport (displacement) of radioactive nuclides
from a possible deep geologic storage site (500 meters deep) to the

Couplex 1 is a simplified, bidimensional simulation in the
geological medium. The storage area is represented by an
homogeneous rectangle. Nuclides are released uniformly in time and
migrate through the geological medium.

Couplex 2 concentrates on the storage area. It is meant to
simulate more precisely the release of the nuclides that might
escape from the waste packages.

Couplex 3 aims at coupling the detailed release of the nuclides
(Couplex 2) with their migration through the geologic medium
(Couplex 1).

Research groups wishing to participate in these computational
exercises are invited to look at URL:

Michel Kern, Couplex Scientific Secretary
INRIA, Rocquencourt
BP 105
78153 Le Chesnay Cedex
Tel: (+33) (0)1 39 63 58 41


From: John Butcher <>
Date: Fri, 26 Jan 2001 10:37:49 +1300 (NZDT)
Subject: Choosing Date for Auckland ODE Workshop

Dear Colleagues,

The next workshop in the ANODE (Auckland Numerical Ordinary Differential
Equations) series will be held in Auckland, New Zealand in one of the two
weeks 30 June - 4 July 2003 or 14 - 18 July 2003.

The reason for this choice of possible dates is the fact that the ICIAM
2003 Conference will be held in Sydney, Australia during the week 7 - 11
July and participants from other parts of the world may wish to take part
in both events.

If you have a possible interest in our workshop, or wish to give us
information or guidance on our choice of dates, please consult the website

If this form reply does not suit you, please feel free to write to me

John Butcher


From: Paul Saylor <>
Date: Sat, 27 Jan 2001 15:02:02 -0600 (CST)
Subject: Midwest NA Day

for the
Annual Midwest NA Day

Location: Urbana, IL
Date: Saturday, May 12, 2001

This year's Annual Midwest NA Day is scheduled for Saturday, May 12, 2001
on the University of Illinois, Urbana-Champaign campus. NA Day will start
at 8:30 AM and conclude at 5:30 PM.

Midwest NA Day conferences have been well-attended, one-day meetings for
colleagues within the Midwest region to interact without necessarily having
to travel by air. Midwest NA Day is an opportunity for young people,
especially, to present their work in a friendly atmosphere. A notable
example was an early presentation that Roland Freund gave on QMR.

The informal nature of the conference and the variety of talks together
combined in the past to make Midwest NA Day a memorable event. The
numerical group hopes to continue this tradition.

Usually there are one or two speakers, not necessarily from the Midwest,
whose prominence sets a tone of excellence for the meeting. This year, Gene
Golub is planning to participate. Also, Zdenek Strakos of the Academy of
Sciences of the Czech Republic and Adjunct Professor at Emory University
will attend and present a talk.

The conference will be held the same weekend that Bill Gear receives an
Alumni Achievement Award at graduation ceremonies in Urbana.

(Announcements of attendees and titles of their talks will be made as these
become available.)

Organizers: The faculty, students and staff of the numerical group of the
Computer Science department.

For further information:

Contact person:

FAX: 217 333-3501


From: T. Terlaky <>
Date: Sun, 21 Jan 2001 23:25:21 -0500
Subject: McMaster Optimization Conference

1st Annual McMaster Optimization Conference:
Theory and Applications
(MOPTA 01)
August 2-4, 2001, McMaster University
Hamilton, Ontario, Canada

The 1st annual McMaster Optimization Conference, (MOPTA 01)
will be held at the campus of McMaster University. It will
be hosted by the Advanced Optimization Lab at the
Department of Computing and Software.

The conference is planned as an annual event aiming to
bring together a diverse group of people from both discrete
and continuous optimization, working on both theoretical
and applied aspects. The format will consist of a small
number of invited talks from distinguished speakers and a
set of selected contributed talks, spread over three days
with no parallel sessions. Our target is to present a
diverse set of exciting new developments from different
optimization areas while at the same time providing a
setting which will allow increased interaction among the
participants. We aim to bring together researchers from
both the theoretical and applied communities who do not
usually get the chance to interact in the framework of a
medium-scale event.

Distinguished guests will give one-hour long invited talks.
Confirmed invited speakers include:
John Dennis (Rice University)
Ignacio Grossmann (Carnegie Mellon University)
Don Jones (GM)
Michael Todd (Cornell University)
Lieven Vandenberghe (UCLA)
David Williamson (IBM Almaden)

Contributions are solicited for presentation at the conference.
Each accepted paper will be alloted a 25 minute talk.
Presentation of recent results is encouraged. Authors wishing
to speak at the conference should submit the abstract on which
the talk will be based, in ASCII or LaTex source, to
by April 30, 2001.
Please use "MOPTA" in the email subject line.
All decisions on acceptance will be made after the closing day of April 30,
2001. A preliminary program will be available before the end of May.

The Organizing Committee
Tam=E1s Terlaky, (Chair)
Stavros Kolliopoulos (CAS, McMaster University)
Tom Luo (ECE, McMaster University)
Henry Wolkowicz (Comb. Opt. University of Waterloo)

Please register on the conference WEB site:


From: Domenico Laforenza <>
Date: Mon, 22 Jan 2001 09:40:26 +0100
Subject: EuroGlobus Workshop

On behalf of the EuroGlobus Steering Committee, we are pleased to
inform you that the preliminary programme of the FIRST EUROGLOBUS
WORKSHOP is now available on our web site:

where you will be able to find detailed information on this event.

The main goal of the Workshop is to foster collaboration among
European users of Globus and closely related Grid technologies, such
as Condor and to promote the use of these technologies as the grid
middleware of choice.
The workshop will include:

- state of the art survey on leading edge Grid topics given by
invited speakers;
- beginner's level tutorials on the Globus and Condor Toolkits;
- advanced level tutorial covering the Globus API;
- talks (based on contributions) on Grid enabled applications and
tools developed using Globus and Condor.

The GLOBUS project is developing fundamental technologies needed to
build computational grids. Grids are persistent environments that
enable software applications to integrate instruments, displays,
computational and information resources that are managed by diverse
organizations in widespread locations.

The 1th EuroGlobus workshop is intended as a forum for the users and
developers of GLOBUS. This workshop offers the opportunity, mainly to
Europeans (but, obviously, it is not limited to them) to present and
discuss problems and report practical solutions related to GLOBUS, in
order to identify new ideas and future directions for research in
GLOBUS and, generally, in Grid Computing.

Areas of interest include, but are not limited to:

Resource Management
Data Management and Access
Application Development Environments
Information Services

We invite everyone with ideas or experiences to contribute to the
success of this event. Contributions should report innovative ideas
and/or practical results/experiences using GLOBUS.

The authors are asked to submit a short abstract (max 1 page)
electronically (pdf or ps files) to either of the EuroGlobus Local
Organizer by the end of April, 2001.

Best Regards,

Domenico Laforenza (CNUCE-Institute of the Italian National Research
Council, Pisa)
Giovanni Aloisio (ISUFI, University of Lecce)


From: Randy LeVeque <>
Date: Tue, 23 Jan 2001 23:19:41 -0800 (PST)
Subject: PIMS Industrial Problem Solving Workshop

University of Washington, Seattle, June 18-22, 2001

The Pacific Institute for the Mathematical Sciences (PIMS) is holding
the 5th PIMS Industrial Problem Solving Workshop (IPSW5) next summer at
the newest PIMS institution, the University of Washington, Seattle,
June 18-22, 2001. Participation by graduate students and faculty from
the US and Canada is encouraged. Financial support is available,
particularly for graduate students who will also attend the Graduate
Mathematics Modelling Camp (GIMMC) the previous week in Victoria, BC.
This camp will provide training experience for up to 60 graduate students
who will have an opportunity to learn techniques of mathematical modelling
under the supervision and guidance of experts in the field. Those
interested should apply as soon as possible through the website listed below.

The IPSW workshop --based on the Oxford Study Group Model-- will follow the
same highly successful format as PIMS' first 4 workshops held in Vancouver
(1997), Calgary (1998), Victoria (1999) and Edmonton (2000).
Six problems will be posed to the workshop participants by industry
experts. The problems are relevant and of current interest to the
participating industry. The workshop participants (both faculty and
graduate students) then spend the rest of the week working on these
unsolved problems with the help of a company representative and some
select academic `mentors'. On the fifth day, oral presentations from each
group are made before the whole assembly. A Conference Proceedings will
be compiled and published by PIMS after the workshop, and distributed
freely to over 500 high-tech companies. Proceedings from previous
PIMS-IPSW's may be viewed at

Graduate student participation is strongly encouraged. All graduate
students should apply to attend the training camp, PIMS GIMMC2001 at the
University of Victoria during the previous week. Graduate participants
at the GIMMC are automatically registered for the IPSW and will be fully
funded for both events.

Limited funds in the form of travel reimbursements and accommodation
expenses are available for faculty participants, for whom the workshop
offers the following benefits:
1) The challenge of applying their skills to new and relevant problems
directly applicable to industry.
2) The opportunity for continued collaboration with the workshop's academic
and industrial participants.
3) The opportunity to help promote the role of the mathematical sciences by
showing businesses and governments the tangible benefits of supporting
mathematical sciences.

Details about the administration of the workshop, financial support and
problem descriptions (once finalized) can be found on the webpages


From: Volker Mehrmann <mehrmann@math.TU-Berlin.DE>
Date: Wed, 24 Jan 2001 20:20:29 +0100 (MET)
Subject: Workshop in Berlin on Numerical Linear Algebra

First Announcement:

Following the first EMS/SIAM Conference on Applied Mathematics in our Changing
World (see as a satelite meeting, a two-days

GAMM Workshop on
Numerical Linear Algebra

with special emphasis on

Numerical Methods for Structured and Random Matrices

will be organized September 7.-8. 2001 at Technical University of Berlin.


Conference organizers:

Andreas Frommer, Bergische Universitaet GH Wuppertal
Volker Mehrmann, Technische Universitaet Berlin
Reinhard Nabben, Universitaet Bielefeld.

The workshop will consist of 20-25 talks of 30 min.
For those who are interested in participating send email to
Volker Mehrmann email:
or Kerstin Ullrich email:

If you want to present a talk please send a title and abstract
until May 31. 2001 to one of these adresses.

Andreas Frommer, Volker Mehrmann , Reinhard Nabben


From: Jack Dongarra <>
Date: Thu, 25 Jan 2001 11:28:17 -0500
Subject: BLAS Technical Forum Standard

The BLAS Technical Forum Standard has been completed. The document
is available in its entirety on the BLAS Technical Forum webpage:

and will also appear in the International Journal of High Performance
Computing Applications, as well as related articles in ACM Transactions
on Mathematical Software. Reference implementations and test suites
are in preparation and will be available on the webpage.

The BLAS Technical Forum was established to consider expanding the Basic
Linear Algebra Subprograms (BLAS) in a number of directions in the light
of modern software, language, and hardware developments.&nbsp; The first
meeting of the Forum was held in 1996, and meetings continued through 1999.
Minutes from all of the meetings are available on the BLAS Technical Forum

We would like to thank the community at large for all of the feedback
we have received on this standards document.

For more information see:

Jack Dongarra and Sven Hammarling


From: Peter Wilders <>
Date: Thu, 25 Jan 2001 22:26:03 +0100 (CET)
Subject: Parallel CFD Conference in the Netherlands


May 21-23, 2001
Hotel Zuiderduin
Egmond aan Zee
The Netherlands

The conference covers all relevant subjects with practical and industrial
issues as one of the traditional highlights. Deadline of submission of
abstracts is February 10, 2001.

F. Challot (France), C. Farhat (USA), L. Kleiser (Switzerland),
N. Kroll (Germany), S. de Leeuw (Netherlands), P. Lyster (USA),
G. Meurant (France), K. Morinishi (Japan), H. van der Ven (Netherlands)
D.R. Emerson (United Kingdom), J.Periaux (France),
A. Quarteroni (Switzerland), P. Wesseling (The Netherlands)


From: Torsten Braun <>
Date: Fri, 26 Jan 2001 15:02:30 +0100
Subject: Workshop in Bern on Distributed Computing

Dear colleagues,

The SPEEDUP Society is an independent Swiss non-profit organization
organizing interdisciplinary workshops on topics in computational
sciences and high-end computing. The 29th SPEEDUP Workshop will be held
at the University of Bern, Switzerland on March 22 - 23, 2001. The topic
of this year's workshop is on "Distributed Computing and High-Speed

The workshop will address several issues on high-speed networks and
communications, distributed systems and applications, as well as latest
trends in distributed high-performance computing. It is intended to
bring together members of academic institutions, private enterprises and
government who are interested in obtaining an overview of the
state-of-the-art of these areas.

If you want to participate in the workshop, please register until March
12, 2001. The number of participants is limited.

For further information such as speakers, program, registration, hotel
and travel information please see The
speaker list and the program will be updated permanently. Please also
note that the 9th General Assembly of the SPEEDUP society will be held
in the late afternoon/evening of March 22, 2001.

We are grateful to Cisco Switzerland and Getronics Switzerland for
sponsoring this event.

Please excuse duplications of this announcement.

Torsten Braun


From: Olga Caprotti <>
Date: Fri, 26 Jan 2001 16:19:16 +0100
Subject: Workshop in Austia on Mathematical Knowledge Management

MKM 2001
First International Workshop on Mathematical Knowledge Management
RISC, A-4232 Schloss Hagenberg, September 24-26, 2001
Special Issue on Mathematical Knowledge Management
Annals of Mathematics and Artificial Intelligence

Mathematical Knowledge Management is an exciting new field in the
intersection of mathematics and computer science.

We need efficient, new techniques - based on sophisticated formal
mathematics and software technology - for taking fruit of the enormous
knowledge available in current mathematical sources and for organizing
mathematical knowledge in a new way.

The Workshop and the Special Issue should bring together math
researchers, software developers, publishing companies, math
organizations, and teachers for exchanging their views and approaches
and for pushing the field.

Whereas the workshop is designed to provide a forum for discussion and
presentation of early ideas, the special issue is a forum for
polished, refereed papers in the area of mathematical knowledge
management. Participation and presentation of talks and papers is
possible in both the workshop and the special issue, jointly or

Workshop Organizers:

* Bruno Buchberger (General Chair)
* Olga Caprotti (Managing Chair)

Special Issue Editors:

* Bruno Buchberger (RISC-Linz)
* Gaston Gonnet (ETHZ)
* Michiel Hazewinkel (CWI)

Call for Papers:


From: Philippe Guillaume <>
Date: Mon, 29 Jan 2001 08:22:56 +0100
Subject: Workshop in Toulouse on Large Sparse Linear Systems

The deadline for submission of abstracts to the following workshop
has been reported to February 16, 2001. Notification of acceptance
of contributed talks will be sent by February 21.

INSA, Toulouse, France
on 1-2 march 2001


The workshop is intended to stimulate the interplay of researchers
and industrials in the field of direct or iterative methods for
the solution of large sparse linear systems, and to bring out the
actually most efficient methods as well as the most promising
research directions.

The invited lectures are:

Abderrahmane BENDALI INSA Toulouse
Roland MASSON IFP Paris
Alain RIGAL Universite Paul Sabatier, Toulouse
Francois-Xavier ROUX ONERA, Paris
Yousef SAAD University of Minnesota, Minneapolis

Beside these one-hour plenary lectures, the program will include
half-hour lectures. All who are interested to contribute should
submitt an abstract.


All speakers are invited to submit an abstract in LaTeX format (to
be loaded on, not exceeding two
pages, via e-mail to before February 16, 2001.
Notification of acceptance of contributed talks will be sent by
February 21.


For additional information about this conference (programme,
registration, accomodation, ..) please go to the following URL:


Pierre CHARRIER Universite Bordeaux I
Philippe GUILLAUME INSA Toulouse
Philippe HOMSI EADS Toulouse
Mohamed MASMOUDI Universite Paul Sabatier, Toulouse
Olivier PIRONNEAU Universite Paris VI
Yousef SAAD University of Minnesota, Minneapolis


Luca AMODEI Universite Paul Sabatier, Toulouse
Alain HUARD INSA Toulouse
Sophie JAN Universite Paul Sabatier, Toulouse
Caroline LE CALVEZ INSA Toulouse
Benoit VERGE INSA Toulouse


From: Andrew Lumsdaine <>
Date: Mon, 29 Jan 2001 12:39:24 -0500
Subject: Symposium on Principles and Practice of Parallel Programming

ACM SIGPLAN Symposium on Principles and Practice of Parallel Programming

June 18-20, 2001 Snowbird, Utah, USA (Immediately preceding PLDI01)

see for details.

Call for Papers:

The Eighth ACM SIGPLAN Symposium on Principles and Practice of
Parallel Programming (PPoPP'01) will be held June 18-20, 2001
just prior to PLDI'01 in Snowbird, Utah. The goal of the PPoPP
Symposia is to provide a forum for papers on the principles and
foundations of parallel programming, tools and techniques for
parallel programming, and experiences in using parallel
programming to solve applications problems.

Topics of interest include (but are not limited to):

- Design and implementation of parallel programming languages
and systems (including object-oriented languages such as Java);
- Experiences in using parallel programming to solve
applications problems;
- Programming experience with parallel programming languages
and systems;
- Restructuring compilers and program manipulation systems for
parallel systems;
- Runtime systems issues for parallel systems; environments,
debuggers, monitoring tools and operating system support for
parallel programming;
- The relationship between parallel programming languages,
compilers, libraries, and machine architecture;
- Performance aspects of parallel programming systems; and
- Computational grids and metacomputing.

Papers should report on original research in any of these areas
of parallel programming, and should contain enough background
material to make them accessible to the entire parallel
programming research community. In the context of PPoPP,
"parallel computing" should be construed broadly to include high
performance and distributed computing. In fact, computational
grids and metacomputing are areas of special interest for this
PPoPP. Experience papers should indicate how the experiments
illustrate general principles; papers oriented towards
foundations should indicate how the work illuminates or
influences practice.

Summary of Important Dates

- Submissions Due March 5, 2001
- Acceptance Notices to Authors April 6, 2001
- Camera Ready Papers due May 11, 2001
- Conference June 18-20, 2001


From: Mike Christie <>
Date: Mon Jan 29 14:32:32 EST 2001
Subject: PhD Position at Heriot-Watt University

Applications are invited for a PhD studentship in Reservoir Engineering to
be held in the Dept of Petroleum Engineering at
Heriot-Watt University. The Department of Petroleum Engineering has an
international reputation for excellence, received a 5*
in the 1996 RAE, and has strong links with industry and other institutions
such as Stanford University.

The successful candidate will be part of a group specialising in uncertainty
quantification and accurate modelling of fluid flow in oil reservoirs.
Candidates should have excellent numerical and computational skills, and a
good honours degree in applied mathematics, physics or engineering with a
strong mathematical bias.

For further details about the position please contact Prof Mike Christie
(email: , tel 0131 4518063) To apply please send
a cv and names and contact details of two academic referees to
Anne Mathers, Department of Petroleum Engineering, Heriot-Watt University,
Edinburgh, EH14 4AS. ( )

Closing date for applications is 28 February 2001.

See also


From: Verdune Biles <>
Date: Mon, 22 Jan 2001 14:21:17 +1100
Subject: Lecturer Positions at Australian National University

The Australian National University
School of Mathematical Sciences
Department of Mathematics


Salary $49,835 - $58,798 pa

Ref: SMS123

For further information regarding this position, please contact our web
site at

Closing date: 23 February 2001


Salary: Lecturer (Level B) $49,835 - $58,798 per annum
Senior Lecturer (Level C) $60,589 - $69,554 per annum

Ref: SMS 152

For further information regarding this position, please contact our web
site at

Closing date: 28 February 2001


From: Tim Kaiser <>
Date: Thu, 25 Jan 2001 14:49:03 -0800
Subject: Staff Position at San Diego Supercomputer Center

Posting Number: 023101-G

San Diego Supercomputer Center (SDSC)
Working Title: Parallel Tools Analyst
Payroll Title: Programmer/Analyst III
Hiring Salary Range: $47,900-$84,600/year
Open Until Filled


Analyze, evaluate, and identify tools for enabling the
efficient usage of SDSC's supercomputers. Tools include
debuggers, profilers, libraries, and compilers. Present results
in written documentation, informal discussions, and training
sessions, to provide advanced technical guidance to others on an
ongoing basis and be recognized as a resource in the area of
parallel tools and environments. Remain abreast of and help
advance the state-of-the-art in the area of tools for parallel
scientific programming on supercomputers through collaboration in
proposals and R&D with UCSD Computer Systems Engineering and
other external organizations. Work on multiple problems or tasks,
not necessarily well defined, and make recommendations that
impact an entire project or system.


Bachelor's degree in Computer Science or a related scientific
field with relevant programming experience or a comparable
combination of education and experience. Demonstrated work
experience with at least one of the specified, key programming
languages such as Fortran, C, or C++, and application development
environments relevant to high performance computer programming
and debugging. Advanced knowledge of parallel application
development and the application and development environments
relevant to supercomputing programming (Unix). Ability to perform
studies to determine requirements for parallel programming tools
and applicability of tools to particular projects. Excellent oral
and written communication skills.

For information about the SDSC, visit

EEO/AA Employer


For Application Information and Employment Procedures, please
refer to the Applicant's Workbench at


From: Howell Peregrine <>
Date: Fri, 26 Jan 2001 12:13:29 +0000 (GMT Standard Time)
Subject: Postdoctoral and Staff Positions at Bristol University


Openings are available for four post-docs and a scientific
programmer in the Applied Mathematics and Numerical Analysis Group in
the Department of Mathematics at Bristol University, England.
All the post-doc projects have interesting numerical aspects.

Please see for more details.

D.H.Peregrine, J.P.Keating, S.Wiggins.


From: Roberto Natalini <>
Date: Sun, 28 Jan 2001 23:11:42 +0100
Subject: Positions at Italian National Council for Researches

A global announcement (unfortunately only in Italian, but not only for
Italians!) for various positions at Italian National Council for
Researches (and not only for Numerical Analysis) is now posted
in the WEB page of CNR.

The deadline is February 28, 2001.

In the framework of the current reorganization of the scientific network of the
Institutes of CNR, 20 new Institutes have been started; among them the Istituto
per le Applicazioni del Calcolo "M. Picone" will be located in Rome, including
the "old" IAC of Rome, the IAGA in Florence, the IAM in Naples and the IRMA in

There are now available the position for the Director for the new Institut and
many permanent positions for researchers (with the old denominations): 5 at IAC,
8 at IAM, 1 at IAGA and 4 at IRMA.
More details are given at link ;

look also at

for all new position available at CNR.
You are kindly invited to give the best diffusion of this announcement.

Best regards. Roberto Natalini


From: Thomas Hogan <>
Date: Mon, 22 Jan 2001 12:15:16 -0500 (EST)
Subject: Contents, Journal of Approximation Theory

Table of Contents: J. Approx. Theory, Volume 107, Number 2, December 2000

Michael J. Johnson
Approximation in $L_p(\BR^d)$ from spaces spanned by the perturbed
integer translates of a radial function

Di-Rong Chen
Frames of periodic shift-invariant spaces

A. M. Rubinov and I. Singer
Best approximation by normal and conormal sets

R. D. Grigorieff, I. H. Sloan, and J. H. Brandts
Superapproximation and commutator properties of discrete orthogonal
projections for continuous splines

Piotr Mankiewicz and Carsten Sch\"utt
A simple proof of an estimate for the approximation of the Euclidean
ball and the Delone triangulation numbers

F. Vogl
On the uniform approximation of a class of analytic functions by
Bruwier series

P. Wojtaszczyk
Greedy algorithm for general biorthogonal systems

Lesaw Skrzypek
Uniqueness of minimal projections in smooth matrix spaces


Vasiliy A. Prokhorov
Rates of best rational approximation of analytic functions

Author index for volume 107


From: Corry Magrijn <>
Date: Sat, 27 Jan 2001 14:16:41 +0100
Subject: Contents, Mathematics of Control, Signals, and Systems

Contributed by Jan H. van Schuppen

Mathematics of Control, Signals, and Systems (MCSS)

Volume 13 (2000), Number 4

D. Teneketzis and M.S. Andersland,
On partial order characterizations of information structures.
MCSS 13 (2000), 277-292.

H. Logemann and E.P. Ryan,
Time-varying and adaptive discrete-time low-gain control of
infinite-dimensional linear systems with input nonlinearities.
MCSS 13 (2000), 293-317.

P. Dupuis, M.R. James, and I. Petersen,
Robust properties of risk-sensitive control.
MCSS 13 (2000), 318-332.

A. Hansson and B. Wahlberg,
Continuous-time blind channel deconvolution using Laguerre
MCSS 13 (2000), 333-346.

B. Kacewicz,
Optimal average case estimation in Hilbert norms.
MCSS 13 (2000), 347-359.

Information on MCSS including tables of contents is
available at its home pages:


From: Oleg Burdakov <>
Date: Mon, 29 Jan 2001 10:57:18 +0100 (MET)
Subject: Contents, Optimization Methods and Software

Table of Contents
Optimization Methods and Software (OMS)
Volume 14, Number 4 (January, 2001)

G.L. Xue and M.R. Lasher
Fast evaluation of potential and force field in particle systems using
a fair-split tree spatial structure

E.K. Kostousova
Control synthesis via parallelotopes: optimization and parallel

Forthcoming papers and complete table of contents for the journal OMS:

Instructions for authors, subscription information, free sample copies:

Latex style files:


End of NA Digest