NA Digest Sunday, September 5, 1999 Volume 99 : Issue 35

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

Submissions for NA Digest:

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Information about NA-NET:

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URL for the World Wide Web:

From: Adi Ben-Israel <>
Date: Mon, 30 Aug 1999 03:54:07 -0400 (EDT)
Subject: Seeking Examples of Nonlinear Equations

Dear Colleagues,

I would appreciate receiving examples of (or references for)
"real-world" systems of M nonlinear equations in N variables,
with M,N between 10 and 100, but not necessarily equal.
These examples are needed for testing Newton-like methods.

Thanks in advance.

Adi Ben-Israel
tel: +1-732-445-5631
fax: +1-732-445-5472

RUTCOR-Rutgers Center for Operations Research
Rugers University
640 Bartholomew Rd
Piscataway, NJ 08854-8003, USA


From: Joel Storch <>
Date: Thu, 02 Sep 1999 22:24:27 +0000
Subject: Rank Deficient Least Squares

I am looking for an algorithm to solve the rank deficient least squares
problem recursively (preferably employing singular value decomposition).
Each update should be a minimum norm solution.

Joel Storch (
The Aerospace Corporation
Los Angeles, CA.


From: Stephen Vavasis <vavasis@CS.Cornell.EDU>
Date: Fri, 03 Sep 1999 17:32:30 -0400
Subject: QMG 2.0 Mesh Generator Released

I would like to announce the release of QMG2.0. QMG is free software
available on the Web for fully automatic unstructured finite element
mesh generation in two and three dimensions. It can generate meshes
for complex domains with curved boundaries and nonmanifold features.
QMG 2.0 can be run either from the shell, under Tcl/Tk (a freeware
scripting language) or Matlab. The Matlab version includes a simple
finite element solver. QMG is written in primarily in C++.

The main new feature of QMG2.0 (compared to QMG1.1) is its ability to
handle true curved geometry. QMG2.0 permits boundaries defined by
Bezier curves, triangular Bezier patches and quadrilateral
tensor-product Bezier patches. Representations of certain simple
curved geometries (cylinders, spheres, tori) using Bezier patches
are shipped with QMG.

For more information, please see:

== Steve Vavasis (


From: Mark Gockenbach <>
Date: Sun, 5 Sep 1999 17:27:39 -0400 (EDT)
Subject: MATLAB Tutorial on the Web

Dear Na-netters,

I wrote a Matlab tutorial, "A practical introduction to Matlab",
that some of you may find useful in teaching numerical analysis and
numerical methods courses. The tutorial is aimed at students who
have not used Matlab before. It explains the basics features of Matlab
in some detail, with examples, and points the students to the more
advanced features. The tutorial is available on the Web as
both PostScript (
and HTML ( documents.
Please feel free to direct your students to these documents or to create links
to them from your own web pages.

Mark Gockenbach
Department of Mathematical Sciences
Michigan Technological University


From: Walter Gautschi <>
Date: Mon, 30 Aug 1999 10:49:29 -0500 (EST)
Subject: Corrections for Gautschi's Book

A list of corrections to my book ``Numerical analysis: an
introduction'', Birkhaeuser, Boston, 1997 is being maintained
on my home page at the URL

Walter Gautschi
Department of Computer Sciences
Purdue University
West Lafayette, IN 47907-1398


From: Lisette de Pillis <>
Date: Thu, 2 Sep 1999 13:19:16 -0700 (PDT)
Subject: Change of Address for Lisette de Pillis

Dear colleagues,

I am happy to announce that I have been named the Argonne Year 2000
Maria Goeppert-Mayer Distinguished Scholar, and consequently will be
visiting the Argonne National Laboratory this academic year
(September 1999 - August 2000).

My address for this year is:
L.G. de Pillis
Mathematics and Computer Science Division, C-219
Argonne National Laboratory
Argonne, IL 60439

Phone: (630) 252-0926
e-mail: or

Lisette de Pillis


From: Michael Mascagni <>
Date: Mon, 30 Aug 1999 10:46:27 -0400
Subject: Change of Address for Michael Mascagni

Starting the Fall Term of the 1999-2000 school year I am at:

Prof. Michael Mascagni Telephone: +1.850.644.3290
Department of Computer Science Facsimile: +1.209.796.8746
Florida State University E-mail:
203 Love Building Home Page:
Tallahassee, FL 32306-4530 USA Office: 463 Dirac Library

Please update your records accordingly. Thanks.--MM


From: Eyal Arian <>
Date: Mon, 30 Aug 1999 17:10:22 -0400 (EDT)
Subject: Change of Address for Eyal Arian

I have moved from ICASE to Ohio university.
My new address is:

Department of Mathematics
554 Morton Hall
Athens OH 45701
Ph: (740) 593-1280

Eyal Arian.


From: Gary Kumfert <>
Date: Thu, 2 Sep 1999 18:11:32 -0700 (PDT)
Subject: Change of Address for Gary Kumfert

Dear Colleagues and Friends,

I've successfully defended my PhD dissertation
at Old Dominion University and am now settling
into my new position as a Computer Scientist in CASC.
The contact information is listed below.

Gary Kumfert
Center for Applied Scientific Computing
Lawrence Livermore National Laboratory
P.O. Box 808, L-661
Livermore, CA 94550-9234

phone: 925-424-2580
fax: 925-424-2477




From: Linda Petzold <>
Date: Sun, 5 Sep 1999 10:24:12 -0700
Subject: Report on ANODE99


The 1999 Auckland Numerical Ordinary Differential Equations Workshop
(ANODE99) took place at The University of Auckland, New Zealand,
August 16-20, 1999. The workshop, organized by John Butcher, Robert
Chan, Nicolette Goodwin and Allison Heard of the Department of
Mathematics, University of Auckland, was one of a series of
international workshops in numerical analysis held in Auckland over
the last several years. The workshop was attended by 63 academic
participants from over 16 countries. In addition to the many
interesting museums and experiences offered in the city of Auckland,
there were opportunities to visit the rain forest and see a beautiful
waterfall, and to stroll along a magnificent unspoiled black sand

The meeting included three morning sessions consisting of lectures on
specific themes, allowing a more in-depth presentation than is usually
possible. The themes were: Dynamics of General Linear Methods (Ernst
Hairer and Pierre Leone), The Joint Spectral Radius of Families of
Matrices, with Applications to Stability Theory (Marino Zennaro and
Nicola Guglielmi) and Sensitivity Analysis and Optimal Control for
Large-Scale Dynamical Systems (Linda Petzold and Radu Serban). The
remaining talks were organized into minisymposium and covered a wide
range of topics in numerical ordinary differential equations including
stochastic differential equations, delay equations, software, waveform
relaxation techniques, and differential-algebraic equations. There
was much opportunity for discussion, including an interesting panel
session on the last day.

The next ANODE workshop will be held in January 2001 where there will
be a special emphasis on software for ordinary differential equations
and related problems.

Linda Petzold


From: Andre Weideman <weideman@ING.SUN.AC.ZA>
Date: Fri, 3 Sep 1999 17:53:51 +0200
Subject: South African Symposium on Numerical and Applied Mathematics

The 24th annual South African Symposium on Numerical
and Applied Mathematics will be held in Stellenbosch,
South Africa, April 3-5, 2000.

Numerical analysts, applied mathematicians and engineers
are invited to attend and present their work. Contributions
on all aspects of applicable and/or computational mathematics
will be appropriate.

Details related to the keynote speakers, accommodation,
registration, transport and tourist attractions will
be posted in due course on the conference web page

E-mail can also be sent to members of the organizing

Ben Herbst (
Andre Weideman (
Karen Goosen (


From: S. I. Hariharan <>
Date: Wed, 1 Sep 1999 16:56:20 -0400 (EDT)
Subject: Chair Position at the University of Akron

The University of Akron
Department Chair - Department of Mathematics and Computer Science

The Department of Mathematics and Computer Science invites applications and
nominations for the position of Department Chair at the rank of professor with
tenure beginning as early as July 1, 2000. Applicants should have a strong
research record with a history of funding, have good expository skills, and
proven ability to work with graduate students. Applicants should exhibit
strong leadership and administrative skills. A Ph.D. in applied mathematics,
mathematics, or computer science is required. The applicant should have a
strong interest in the continued development and expansion of the advanced
degree programs affiliated with the Department.

The Department includes thirty-two full-time faculty as well as part-time
faculty. It offers B.S. and M.S. degrees in mathematics, applied mathematics,
and computer science, and a Ph.D. in engineering applied mathematics
(in cooperation with the College of Engineering). Faculty in the Department
are dynamic and received substantial funding in recent years. Research
strengths are in modeling of materials processes, wave propagation, wavelets,
dynamical systems, scientific computation, computer visualization,
interconnection networks, parallel computation, data mining, and classical
analysis. The Department also receives funding for mathematics education.
The applicant's research should reinforce an area of strength of the

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,

Review of applications will begin October 15 and continue until the position
is filled. Informal inquiries are encouraged and will be treated
confidentially. Applicants should submit a letter of application that includes
a statement of academic leadership philosophy, vita, and the names of at least
three references to Dr. T. Norfolk, (, Chair, Department
Chair 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: Ren-Cang Li <>
Date: Wed, 1 Sep 1999 17:02:24 -0400 (EDT)
Subject: Faculty Positions at University of Kentucky


The Mathematics Department at the University of Kentucky
invites applications for at least three tenure-track assistant
professorships to begin in Fall 2000 (subject to budgetary
approval). We are interested in applicants in the areas of
algebra/number theory, computational mathematics, and discrete
mathematics/combinatorial optimization. However, applicants in
other areas are also welcome. We encourage applications from
women and minority groups. Using the AMS application cover
sheet, applicants should submit a vita, a description of research
including future research plans and evidence of effective
teaching to: Recruiting Committee Chair, Mathematics Department,
715 POT, University of Kentucky, Lexington, Kentucky
40506-0027, or through the website In
addition, they should arrange to have at least three letters of
recommendation sent. The deadline for submission of applications
is 31 December 1999, but we expect to begin evaluating
applications as they are received. UK is an Equal Opportunity
Affirmative Action Employer.


From: Montaz Ali <>
Date: Mon, 30 Aug 1999 11:05:06 +0200 (SAST)
Subject: Faculty Position at Witwatersarnd University


Lecturer / Senior Lecturer

Applications are invited from suitably qualified persons for two permanent
lectureship / senior lectureship appointments in computational and applied
mathematics. The successful applicants will assume duties on 1 January

In one of the appointments the successful applicant will be required to
contribute to the teaching, development and administration of the first
year service course "Computational Mathematics I" in the Commerce Faculty.
He/she will also be required to undertake research and supervise higher
degree students in one of the research areas of the department.

The other appointment is for a numerical analyst. The successful applicant
must have an interest in developing numerical analysis in the department
at the undergraduate and postgraduate level. He/she must be able to teach
numerical analysis at all levels from first year to honours, have a
research record and a research programme in numerical analysis and be able
to supervise higher degree students.

The research interests of the department are: numerical analysis,
mathematics education, control theory and optimisation, differential
equations, fluid and solid mechanics, mathematics of finance, industrial
mathematics, image processing and astronomy.

Lecturer : R68 052 - R109 944 p.a.
Senior Lecturer: R93 672 - R124 392 p.a.

BENEFITS: Annual bonus, generous leave, provident fund, medical aid,
housing subsidy (if eligible), 100% financial assistance towards
dependants' University studies (if applicable).

ENQUIRIES: Dr Montaz Ali
Department of Computational and Applied Mathematics,
Witwatersarnd University,
Email :

To apply, submit a detailed CV with names, addresses & contact numbers of
3 referees and certified copies of degrees / diplomas to: Pumla Ngcobo,
Personnel Office (Academic), University of the Witwatersrand, Private Bag
3, Wits 2050.


QUOTE REF: M & G 19812



From: Manil Suri <>
Date: Wed, 1 Sep 1999 16:07:14 -0400 (EDT)
Subject: Faculty Position at University of Maryland Baltimore County


Department of Mathematics and Statistics

The department invites applications for a tenure-track faculty position
in the area of Scientific Computation, at the rank of assistant professor,
starting in the fall of 2000. The successful candidate should have a PhD in
mathematics or a related field, an active, independent research program,
strong potential for obtaining external funding, and a commitment to
excellence in teaching. Preference will be given to candidates able to
conduct interdisciplinary research, as well as those able to interact
with existing groups in the department. Current areas represented in the
department include numerical analysis, PDEs, optimization and systems theory.

The department offers BS, MS, and PhD degrees in applied mathematics and
statistics. Refer to the Web page at for more

Applicants should send a vita, three letters of reference, and a summary
of their current research program to: Scientific Computation Recruiting
Committee, Department of Mathematics and Statistics, University of
Maryland Baltimore County, Baltimore, MD 21250. Screening of applications
will commence November 1, 1999 and will continue until the position is

UMBC is an Affirmative Action, Equal Opportunity Employer.


From: Corry Magrijn <>
Date: Tue, 31 Aug 1999 00:05:23 +0200
Subject: Contents, Mathematics of Control, Signals, and Systems

Mathematics of Control, Signals, and Systems (MCSS)

Volume 12 (1999), Number 3

L.C.G.J.M. Habets,
System equivalence for AR-systems over rings - with
an application to delay-differential systems. <BR>
MCSS 12 (1999), 219-244.

B. Ho-Mock-Qai,
Non-smooth robust stabilization of a class of
two-dimensional nonlinear systems. <BR>
MCSS 12 (1999), 245-269.

D. Nesic,
Controllability for a class of parallelly connected
polynomial systems. <BR>
MCSS 12 (1999), 270-294.

H. Akcay and B. Ninness,
Orthonormal basis functions for continuous-time
systems and $L?p$ convergence. <BR>
MCSS 12 (1999), 295-305.

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

Address for submissions:
J.H. van Schuppen (Co-Editor MCSS)
P.O.Box 94079
1090 GB Amsterdam
The Netherlands

Bradley Dickinson, Eduardo Sontag, Jan van Schuppen (Editors)


End of NA Digest