NA Digest Sunday, June 18, 2000 Volume 00 : 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: Alan Miller <>
Date: Thu, 15 Jun 2000 11:40:14 +1000
Subject: Open Directory Project, Numerical Analysis

The Open Directory Project is a kind of encyclopaedia of WWW links.
It is one of the main sources for search engines.
When I checked a few minutes ago, it had:
1,825,441 WWW links
25,768 editors
277,729 different categories
Point your web browser to:
to see the current numbers at the bottom of the home page.

One of those categories is Science:Math:Numerical_Analysis
That category needs an editor.
Any volunteers?

If you look at the category Science:Math you find:

Top: Science: Math (4,147) Description

Academic Departments (461)
Educational Resources (325)
Employment@ (14)
Events (28)
History (16)
Mathematicians (170)
Organizations (73)
Publications (222)
Research (110)
Software (180)

Algebra (84)
Calculus (21)
Category Theory (14)
Chaos (41)
Combinatorics (101)
Computability (4)
Cryptography (122)
Differential Equations (29)
Fractals (109)
Geometry (104)
Graph Theory (54)
Group Theory (11)
Information Theory (116)
Logic (490)
Mathematical Recreations (103)
Number Theory (326)
Numerical Analysis (39)
Operations Research (103)
Potential Theory (7)
Probability (46)
Set Theory (12)
Specific Numbers (96)
Statistics (382)
Topology (46)
Wavelets (90)

Those numbers in brackets are the numbers of links.
Notice in particular:
Logic (490)
Statistics (382)
Number Theory (326)
Numerical Analysis (39)

The first 3 of these categories each have editors who have collected
links. Numerical Analysis does not have an editor, though there is
an editor for the Software subsection under NA, and most of the 39
links are under this sub-category.

The home page gives details on how to become an editor.
N.B. I am the editor for the Fortran:Source_Code category.

Alan Miller
Retired Statistician (CSIRO), Melbourne, Australia
FAX: (+61) 3-9545-8080
(+61 =3D Australia, 3 =3D Melbourne)


From: Roger Grimes <>
Date: Fri, 16 Jun 2000 14:03:23 -0700
Subject: Change of Address for Roger Grimes

Roger Grimes is taking a fork in the road and changing jobs.
My new contact information is:

Roger Grimes
Livermore Software Technology
7374 Las Positas
Livermore, CA 94550


From: H. J. Oberle <>
Date: Tue, 13 Jun 2000 15:05:56 +0200
Subject: Colloquium in Memory of Lothar Collatz

September 29-30, 2000

With this meeting we revitalize the formaly successful colloquia with
the same title which were held in honor of LOTHAR COLLATZ.

Everyone is welcome to attend. A presentation of a lecture in the above
mentioned theme is encouraged.

The meeting consists of parallel sessions and some main lectures.


Philip E. Gill (San Diego)
Hans Joseph Pesch (Bayreuth)
Ursula van Rienen (Rostock)
Thomas Sonar (Braunschweig)
Hans Troger (Vienna)
Harry Yserentant (Tuebingen)

There will be a dinner in the evening of September 29, 2000.

For more information, please see the homepage of the conference at
or send an e-mail to

The Organization Committee
G. Opfer - I. Gasser - U. Grothkopf - H.J. Oberle - K. Taubert


From: Sergey V. Meleshko <>
Date: Wed, 14 Jun 2000 15:57:29 +0700
Subject: Modern Group Analysis for the New Millennium

27 September - 03 October 2000

The main topics of the conference will include:
- Classical symmetries, invariant solutions and group classification
- Equivalence transformations and their invariants
- New trends in Group Analysis
- Boundary Value Problems
- Fluid Mechanics and Industrial Modelling

The website of the Conference is:

Scientific Committee
Chairman - N.H.Ibragimov (South Africa)
Members - V.A.Baikov (Russia), Y.Choquet-Bruchat (France),
V.A.Dorodnitsyn (Russia), R.K.Gazizov (Russia),
S.V.Khabirov (Russia), F.M.Mahomed (South Africa),
S.V.Meleshko (Thailand), R.I.Nigmatulin (Russia),
L.V.Ovsyannikov (Russia), A.Qadir (Pakistan),
M.Torrisi (Italy).

Organizing Committee
Chairman - S.T.Kusimov
Members - I.Sh.Akhatov, V.A.Baikov, R.K.Gazizov, N.H.Ibragimov,
B.G.Il'yasov, V.F.Kovalev, V.V.Napalkov, V.S.Zhernakov

Secretary - A.V.Gladkov.

Conference address
Department of Mathematics
Ufa State Aviation Technical University
12 K.Marx Str., Ufa 450000, Russia
Fax: (+7) (3472) 222 918 Phone: (+7) (3472) 237 735


From: Lothar Reichel <>
Date: Thu, 15 Jun 2000 09:45:47 -0400 (EDT)
Subject: Conference on Inverse Problems

Preliminary announcement for conference on

Applied Inverse Problems: Theoretical and Computational Aspects
to be held June 18-22, 2001, at Montecatini Terme, Italy.

The scope of the meeting is to bring together scientists and engineers who are
working on theoretical and computational aspects of inverse problems. The
meeting will consist of longer invited lectures, minisymposia and contributed

The following speakers have agreed to present invited lectures:

S. Arridge
A. Bjorck
T. F. Chan
L. Elden
H. W. Engl
G. H. Golub
P. C. Hansen
J. Nagy
Z. Nashed
F. Natterer
R. J. Plemmons
F. Santosa
E. Somersalo

Organizing and Scientific Committee:

M. Bertero, D. Calvetti, T.F. Chan, G.H. Golub, G. Inglese, A. Murli,
R.J. Plemmons, L. Reichel, S. Seatzu, F. Sgallari, G. Talenti

Further information will be made available in early August. Questions
about the conference can be sent to


From: Hans Joachim Werner <>
Date: Sat, 17 Jun 2000 19:57:04 +0200
Subject: International Workshop on Matrices and Statistics


The Ninth International Workshop on
Matrices and Statistics
In Celebration of C. R. Rao's 80th Birthday
Hyderabad, India: December 9-13, 2000

The Ninth International Workshop on Matrices and Statistics, in
Celebration of C. R. Rao's 80th Birthday, will be held in the
historic walled city of Hyderabad, in Andhra Pradesh, India, on
December 9-13, 2000.

The program will start with a two-day course on recent advances
in Matrix Theory with Special Reference to Applications to
Statistics on Saturday, December 9, and Sunday, December 10, 2000.
This will be followed by the presentation of research papers in
the Workshop proper on Monday, December 11--Wednesday,
December 13, 2000; it is expected that many of these papers will be
published, after refereeing, in a Special Issue on Linear Algebra
and Statistics of Linear Algebra and Its Applications.

Organizing Committees

International Organizing Committee:
R. W. Farebrother (Victoria University of Manchester, UK),
S. Puntanen (University of Tampere, Finland),
G. P. H. Styan (McGill University, Canada; vice-chair)
H. J. Werner (University of Bonn, Germany; chair).

Local Organizing Committee:
R. Bhatia (Indian Statistical Institute, Delhi Centre),
P. Bhimasankaram (Indian Statistical Institute, Hyderabad),
V. Narayana (Indian Statistical Institute, Hyderabad),
M. S. Rao (Osmania University, Hyderabad),
B. Sidharth (Birla Science Centre, Hyderabad),
U. SuryaPrakesh (Osmania University, Hyderabad),
R. J. R. Swamy (Osmania University, Hyderabad),
P. Udayasree (University of Hyderabad),
K. Viswanath (University of Hyderabad).

This Workshop is being organized in Hyderabad by the Indian
Statistical Institute and the Society for Development of
Statistics, in collaboration with the Birla Science Centre,
Osmania University and the University of Hyderabad.

We expect that the Short Course will cover numerical linear
algebra, as well as generalized matrix inverses (including
Campbell-Youla, Drazin, group and Moore-Penrose inverses),
matrix partial orderings (including Loewner, minus and sharp
orders), matrix inequalities (including inequalities for
determinants, traces, eigenvalues and singular values), together
with statistical applications. In addition, we expect that there
will be a session on statistical proofs of matrix results, as
well as sessions on linear statistical models, on random matrices,
and on matrices with special reference to applications in
educational testing, electrical engineering, and to psychometrics.

The Short Course will be followed by the Workshop proper, which
will include the presentation of both invited and contributed
papers on matrices and statistics. There will be also a special
session for papers presented by graduate students. We expect that
the topics to be covered will be similar to those covered by
several Special Issues on Linear Algebra and Statistics of Linear
Algebra and Its Applications.

More details on this Workshop are given in the latest issue of
IMAGE (no. 24, pp. 18-19, April 2000) and are updated regularly
on our Workshop Web site


From: Philip J Aston <>
Date: Mon, 12 Jun 2000 09:39:37 +0100 (BST)
Subject: Lectureship at the University of Surrey


Department of Mathematics and Statistics
School of Electronic Engineering,
Information Technology and Mathematics
University of Surrey
Guildford, Surrey GU2 5XH
United Kingdom

Applications are invited for the post of Lecturer in Mathematics from
candidates with a strong research background in any branch of applied
mathematics or the interface between pure and applied mathematics.
Candidates which resonate with current research at Surrey are particularly
encouraged to apply as are candidates who have recently completed their PhD.
The post is supported by a grant from the Foundation Fund in the first year
which will give the appointee time to establish their research with a minimal
teaching load.

The Mathematics Group at Surrey is active in applied mathematics and at the
interface between pure and applied mathematics. Areas of research strength
include mathematical biology, dynamical systems, symmetry and patterns,
numerics and computation, and nonlinear PDEs. Visit the mathematics research
website for further information and details of current projects.

The Post is available from 1st September 2000 or such other date as may be
agreed. Salary is on the Lecturer Grade A or Grade B Scale (GBP17,238 to
GBP30,065 per annum) according to qualifications and experience.

Informal academic enquiries are welcome and may be made to Professor
T J Bridges, tel: +44 (0)1483 259642, or email:

For an application pack and details of how to apply please contact
Mr K E Sivyer, School Personnel Administrator, School of Electronic
Engineering, Information Technology and Mathematics, University of Surrey,
Guildford, Surrey, GU2 7XH, tel. +44 (0)1483- 876125 answerphone/fax
(or 879133 during office hours), email:

Please quote Post Reference Number 2152, supply your postal address and
indicate how this post came to your attention. Closing date for applications
is 14th July, 2000.

The University is Committed to an Equal Opportunities Policy.


From: Mark Cooke <>
Date: Mon, 12 Jun 2000 08:29:59 -0700
Subject: Positions at Talus Solutions

Job Description:

You will be part of a team that is responsible for supplying our
products with implementations of advanced mathematical algorithms.
You will be expected to come up to speed quickly on a wide variety
of problems. This is a challenging job that requires a strong combination
of mathematical and programming skills.If you've ever found yourself
reading Knuth late into the night then this is the job for you.

The ideal candidate will have:

* an M.S. (or B.S. and equivalent experience) in Numerical Analysis,
Operations Research, Computer Science or a related discipline
* strong programming skills in C/C++
* basic knowledge of object oriented programming
and most importantly,
*** a strong desire to learn.

Desired Skills:

* knowledge of computational mathematics, data structures and the like ...)
* experience in software testing and documentation.

About Talus Solutions, Inc.

Talus Solutions, Inc. provides sophisticated software and services that enable
companies to achieve growth by winning new customers and increasing revenue and
profit from existing customers. Focused on improving revenues and profits for
its customers, Talus Solutions products are unique in their ability to analyze
historical information, predict consumer behavior and provide automated
optimization of pricing designed to maximize revenues and profits. Talus
Solutions products and services optimize prices through all sales channels
including direct sales, intermediaries and e-commerce.

As the world's leading provider of Pricing and Revenue Management software, the
company's primarily Fortune 500 customer base covers a broad range of industries
including travel, transport and hospitality, telecommunications, computer and
network manufacturing and distribution, office equipment, automotive, and
e-commerce. Headquartered in Atlanta with offices in Silicon Valley and
London, Talus Solutions offers innovative software systems that have delivered
billions of dollars in incremental revenue and profits to its customers. More
information about Talus Solutions is available at

Please e-mail resume to or send by fax to 650-960-3656.


From: Wim Mulder <>
Date: Tue, 13 Jun 2000 15:01:16 +0200
Subject: Positions at Shell E&P, the Netherlands

Shell International Exploration and Production is looking for
researchers with a background in modelling, inversion, and signal


The Modelling, inversion, and signal processing team carries out
applied research and development projects in image processing,
geophysics, electromagnetic and neutron logging. In most of the
projects, efficient and accurate modelling and/or inversion theory are
required. The role of the team is also to test and implement new
technology for Shell Exploration and Production.

As a member of this team, you will work on challenging projects in the
area of modelling and inversion. Most of the projects have a
significant numerical analysis and programming part. Your work will be
in applied research and development with a clear perspective on
practical applications and realisations of prototypes. In addition,
the investigations often have a strong innovative component.


Your work will be carried out at Shell Exploration and Production,
Technology Application and Research (SEPTAR). This laboratory is
located in Rijswijk, The Netherlands, close to The Hague.


The team is self-managing. Team members share joint responsibility for
all aspects of the work that is undertaken (e.g. project planning,
budget, communication with clients) and for issues like team
self-appraisal and development.


Ph.D. on a subject in or related to modelling, inversion and/or signal
processing, or 2 - 4 years working experience on research in this area.

Relevant/hands-on work experience on (some of) the following
topics, preferably in a mixed research/application environment:

1) Numerical analysis, partial derivative equations, modelling (finite
difference/element methods), inverse theory, (non linear) optimisation

2) Programming experience (C/C++ or Fortran) and knowledge of Unix or Linux.

3) Image or signal processing.

4) Applied physics


1) Communication: working closely with different disciplines and
nationalities, both as customers and as consultant.

2) Flexibility: working in a changing and developing environment.

3) Mindset geared towards innovation and creativity.

4) Able to identify and acquire new projects and opportunities.

JOB INQUIRIES and SUBMISSION of applications to:
Prof. Dr. Ir. G. Ooms
Shell Exploration and Production
Technology Application and Research
P.O. Box 60
2280 AB Rijswijk
The Netherlands

Telephone: +31-70-311 2724
Fax: +31-70-311 3366

General information about Shell can be found on


From: John Mason <>
Date: Tue, 13 Jun 2000 16:43:19 +0100
Subject: Studentships at University of Huddersfield


An excellent PhD opportunity is available for a good [ 2(i) or better]
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 in a thriving NA research group in Huddersfield in
cooperation with Prof M.G.Cox at National Physical Laboratory in Teddington.

The CASE project involves developing new generalisations of radial basis
forms and metrics to fit multidimensional data from industrial measurement
(metrology) problems. The group has excellent facilities in an
award-winning, renovated 1865 textile mill, and the (UK resident) stipend is
=A310,050 p.a. (+ possible age/dependent allowances).

There is a distinct possibility that a second CASE award, for a related
project on the modelling of teeth and plaque, will also be available shortly
on similar conditions with another London area body.

For full details, contact or ring 01484-472150 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 in July 00 for a start between Sept 00 and March 01.


From: S. I. Hariharan <>
Date: Thu, 15 Jun 2000 09:47:41 -0400
Subject: Postdoctoral Position at University of Akron

The University of Akron
Post Doctoral Position - Department of Mathematics and Computer Science

The Department of Mathematics and Computer Science invites applications and
nominations for a postdoctoral position in Applied Mathematics. Successful
candidates are expected to have background in the area of computational
wave propagation. The position is for one year and carries a stipend of
$35,000. This position requires one course per semester teaching.
The position is available as early as July 1, 2000. Applicants should have
a Ph.D. in applied mathematics or related area.

The University of Akron is a state-assisted metropolitan university in
northeast Ohio with approximately 23,500 students. The University is
well-known for its interdisciplinary programs, world-class polymer science
program, and widely recognized departments in engineering, science, business,
and education.

Review of applications will begin June 26, 2000 and continue until the position
is filled. Informal inquiries are encouraged. Applicants should submit a
letter of application that includes research interests, vita, and the names
of at least three references to Dr. S. I. Hariharan , (,
Postdoctoral Fellow Search Committee, Department of Mathematics and Computer
Science, The University of Akron, Akron, OH 44325-4002. For further details
of the Department, visit The University of Akron is an
equal opportunity/affirmative action employer. Women and minorities are
encouraged to apply.


From: Hans Schneider <>
Date: Sun, 18 Jun 2000 09:53:53 -0500 (CDT)
Subject: Contents, Linear Algebra and its Applications

ContentsDirect from Elsevier Science

Journal: Linear Algebra and its Applications
ISSN : 0024-3795
Volume : 313
Issue : 1-3
Date : 01-Jul-2000

Please note that only subscribers can access full text and abstracts
through the provided URLs.

Visit the journal at

pp 1-20
Matrix pencils and a generalized Clifford algebra
C.J. Pappacena

pp 21-40
Linear systems with signed solutions
S.-J. Kim, B.L. Shader

pp 41-51
A new relative perturbation theorem for singular subspaces
R.-C. Li, G.W. Stewart

pp 53-100
Inner-outer factorization and the inversion of locally finite systems
of equations
P. Dewilde, A.-J. van der Veen

pp 101-105
A correction: orthogonal representations and connectivity of graphs
L. Lovasz, M. Saks, A. Schrijver

pp 107-114
Fast and stable eigendecomposition of symmetric banded plus
semi-separable matrices
S. Chandrasekaran, M. Gu

pp 115-126
On the digraphs of sign solvable linear systems
J.-Y. Shao

pp 127-139
On vector Hankel determinants
A. Salam

pp 141-154
The cycle completable graphs for the completely positive and doubly
nonnegative completion problems
J.H. Drew, C.R. Johnson, S.J. Kilner, A.M. McKay

pp 155-161
Reducibility theorems for pairs of matrices as rational criteria
Y.A. Al'pin, K.D. Ikramov

pp 163-171
Inverses of Perron complements of inverse M-matrices
M. Neumann

pp 173-192
Inverse M-matrix completions of patterns omitting some diagonal
L. Hogben

pp 193-201
On a discrete nonlinear boundary value problem
S. Sun Cheng, H.-T. Yen

pp 203-206
A test for copositive matrices
W. Kaplan

pp 207


End of NA Digest