- Today's Editor:
- Cleve Moler
- The MathWorks, Inc.
- moler@mathworks.com

- A Complex Symmetric Tridiagonal Eigenvalue Problem
- Reference Values for Spheroidal Functions
- Origin of Packed Format for Arrays
- New Book on Multiresolution Methods in Scattered Data Modelling
- SIAM Annual Meeting in Portand
- Sparse Days at CERFACS
- Workshop at University of Sheffield on Machine Learning
- Workshop in Washington on the Changing Face of Mathematical Software
- Workshop in Heidelberg on Parameter Estimation
- Advanced Short Course in Italy on Nonsmooth Mechanics of Solids
- Faculty Positions at the University of Birmingham
- Faculty Position at University of Manchester
- Staff Position at the University of Manchester
- Vacancies at University of Kent
- Assistant Professorship at Delft University of Technology
- Contents, ACM Transactions on Mathematical Software
- Contents, Nonlinear Analysis
- Contents, Numerical Algorithms
- Subscribe, unsubscribe, change address, or for na-digest archives:
- http://www.netlib.org/na-net

Information via e-mail about NA-NET:
* Mail to na.help@na-net.ornl.gov.*

-------------------------------------------------------

From: Brad Bell <brad@apl.washington.edu>

Date: Tue, 20 Apr 2004 11:27:13 -0700 (PDT)

**Subject: A Complex Symmetric Tridiagonal Eigenvalue Problem**

Background

We use (x, y, z) do denote position in three coordinates. The

inhomogeneous Helmholtz equation is

[ d^2/dx^2 + d^2/dy^2 + d^2/dz^2 ] F (x, y, z) + k(x, y, z)^2 F (x, y, z) = 0

It is often useful to concentrate on the dependence of k on one spatial

coordinate x , leading to a mode eigenvalue equation

d^2/dx^2 f(x) + k0(x)^2 f(x) = b f(x)

where k0 resembles k in some appropriate way.

For the problems we are interested in, there is absorption of the wave,

which means that k0(x)^2 is complex valued. If one makes the standard

centered second difference approximation for d^2/dx^2 f(x) in a bounded

domain with homogeneous (e. g., f = 0 ) boundary conditions, one is led to

a matrix eigenvalue problem. The matrix is tridiagonal and symmetric with

complex elements along the diagonal and real elements above and below the

diagonal. The matrix it is not Hermitian; in fact we are interested in the

case where it is not even normal. Thus we are lead to the following

question:

Question

Suppose that D is an n by n real diagonal matrix, S is an n by n real

symmetric tridiagonal matrix, and D S is not equal to S D (the matrices do

not commute). What is the best available routine for finding the

eigenvalues and eigenvectors of the matrix S + i D when the dimension n is

between 1 and 1000 ?

It appears that the following article describes

a method that is appropriate:

A QL procedure for computing the eigenvalues of complex symmetric

tridiagonal matrices SIAM J. Matrix Anal App Vol 17, No 1, pp 83-109 1996.

It also appears that the authors have implemented this method in the

routine CMTQL1. Where can one download a copy of this routine ?

------------------------------

From: Martin Nigsch <nigsch@tph.tuwien.ac.at>

Date: Sun, 18 Apr 2004 20:42:17 +0200 (CEST)

**Subject: Reference Values for Spheroidal Functions**

Hello,

I'm looking for reference values for spheroidal functions. In the book

"Spheroidal Wave Functions in Electromagnetic Theory" (Li, Kang, Leong

2002) the authors state:

"It is also found that some of the previous computed results of spheroidal

eigenvalues and spheroidal harmonics are not accurate [...], although they

have been used elsewhere for many years [...]."

The references where that have been used for many years are 1) Flammer,

"Spheroidal Wave Functions" (1957) and 2) Abramovitz, Stegun, "Handbook of

Mathematical Functions" (1972).

My question now is: what reference values are in use nowadays to validate

implementations of spheroidal wave functions? Are there still numerical

discrepancies?

best regards,

Martin Nigsch

Institute for theoretical Physics

TU Vienna

-- answers to na@ganymed.org please --

------------------------------

From: Garry Tee <tee@math.auckland.ac.nz>

Date: Mon, 19 Apr 2004 10:48:53 +1200

**Subject: Origin of Packed Format for Arrays**

In last week's NA Digest, Fred Gustavson asked

I am trying to find out who first proposed packed format for symmetric and

triangular arrays. It appears that many people used packed format early on

and it then got adopted in early linear algebra codes such as the Handbook

of Automatic Computation, Eispack and Linpack. I do know that Velvel Kahan

used this format for a matrix package he developed in 1958.

The first software manual was issued by the University of Cambridge Mathematical

Laboratory in September 1950. The Director Dr M. V. Wilkes edited the

"Report on the Preparation of Programmes for the EDSAC and the Use of the

Library of Subroutines". That first edition was produced on a spirit duplicator

(in violet and crimson), and hence less than 100 copies could be printed.

The subroutines were carefully chosen and very skillfully written. But only

two subroutines deal with linear algebra: V2 Addition and subtraction of

n dimensional vectors, and V1 Multiplication of vector by symmetric matrix.

The specification for V1 states that "Given a symmetric n-by-n matrix of

which only (1/2)n(n+1) elements are stored" (Part 2, page 26), and the complete

subroutine (in EDSAC machine code) is given in Part 3, pages 38 & 39.

A revised version of that Cambridge manual was then published as "The

Preparation of Programs for an Electronic Digital Computer, with special

reference to the EDSAC, and the use of a library of subroutines", by Maurice

V. Wilkes, David J. Wheeler and Stanley Gill, Addison-Wesley Press, Inc.,

Cambridge 42, Mass. USA, 1951 (with many later editions). That book had

immense and beneficial influence upon computer programming. Subroutine V1

is printed (in black and white, not violet and crimson) on pages 102 & 103.

Garry J. Tee,

Department of Mathematics, University of Auckland,

Private Bag 92019, Auckland, New Zealand

------------------------------

From: Armin Iske <iske@ma.tum.de>

Date: Mon, 19 Apr 2004 13:41:37 +0200

**Subject: New Book on Multiresolution Methods in Scattered Data Modelling**

A. Iske: "Multiresolution Methods in Scattered Data Modelling",

Lecture Notes in Computational Science and Engineering, Vol. 37,

Springer-Verlag, Heidelberg, 2004, 182 p., ISBN 3-540-20479-2.

This application-oriented work concerns the design of efficient,

robust and reliable algorithms for the numerical simulation of

multiscale phenomena. To this end, various modern techniques from

scattered data modelling, such as splines over triangulations and

radial basis functions, are combined with customized adaptive

strategies. The resulting multiresolution methods are thinning

algorithms, multilevel approximation schemes, and meshfree

discretizations for transport equations. The utility of the

algorithmic approach taken in this research is supported by the

wide range of applications, including image compression,

hierarchical surface visualization, and multiscale flow simulation.

Special emphasis is placed on comparisons between the various

numerical algorithms developed in this work and comparable

state-of-the-art methods.

------------------------------

From: Connie Young <cyoung@siam.org>

Date: Fri, 23 Apr 2004 13:39:34 -0400

**Subject: SIAM Annual Meeting in Portand**

Conference Name: 2004 SIAM Annual Meeting

Location: Portland, Oregon

Dates: July 12-16, 2004

Program and registration information is available at:

http://www.siam.org/meetings/an04/

Meeting Registration Deadline: Monday, June 14, 2004

Hotel Reservation Deadline: Friday, June 11, 2004

For additional information visit http://www.siam.org/meetings/an04/ or

contact SIAM Conference Department at meetings@siam.org.

------------------------------

From: Iain Duff <I.Duff@rl.ac.uk>

Date: Thu, 22 Apr 2004 20:49:01 +0100 (BST)

**Subject: Sparse Days at CERFACS**

Sparse Days at CERFACS ... June 2-3, 2004

Here are more details about the Sparse Days at CERFACS the dates of which were

announced in a recent NA Digest.

The meeting will commence at 11.00 on Wednesday June 2 and will continue

until the afternoon of Thursday June 3, the exact time being dependent on the

number of talks.

There is no registration fee for the meeting but the cost of the conference

dinner on Wednesday evening will be about 30 euros.

Some low cost accommodation is available at the Meteo residences and

this may be waived for students or other needy cases. This accommodation is

somewhat limited, so you should let us know soon whether you want to stay

there. Communications for this and for hotel information should be made with

Brigitte Yzel (Brigitte.Yzel@cerfacs.fr). If you wish our assistance with

accommodation you must let Brigitte know before May 12th.

Although we are particularly interested by data assimilation applications,

any contribution involving sparse matrix research or applications is welcome.

A title and short abstract should be sent to Martin van Gijzen

(gijzen@cerfacs.fr) before May 12th. You should indicate the time, t, that you

would ideally like for your presentation, 15 min <= t <= 45 min and we

will try to accommodate this request within the constraint of having no

parallel sessions and finishing by 17.00 on June 3rd.

Regularly updated information will shortly be available by following the

indicated web links from the CERAFCS Parallel Algorithms Group web page

http://www.cerfacs.fr/algor/. In particular the tentative schedule will be

available there on May 15th.

------------------------------

From: Joab Winkler <joab@dcs.shef.ac.uk>

Date: Mon, 19 Apr 2004 07:50:47 +0100 (BST)

**Subject: Workshop at University of Sheffield on Machine Learning**

SHEFFIELD MACHINE LEARNING WORKSHOP

Sheffield, United Kingdom

Septemeber 7-10, 2004

www.dcs.shef.ac.uk/ml/workshop

The Machine Learning Research Group in The Department of Computer

Science at The University of Sheffield is organising a workshop on

deterministic and statistical methods in machine learning, with a

strong emphasis on mathematical and numerical methods.

REGISTRATION NOW OPEN

Confirmed invited speakers:

Chris Bishop (Microsoft Research, UK)

Andrew Blake (Microsoft Research, UK)

Herve Bourlard (IDIAP, Switzerland)

Andrzej Cichocki (RIKEN, Japan)

Michael Elad (Technion, Israel)

Jerry Eriksson (Umea, Sweden)

Zoubin Ghahramani (University College London, UK)

Gene Golub (Stanford, USA)

Josef Kittler (Surrey University, UK)

David Lowe (Aston University, UK)

David MacKay (Cambridge University, UK)

Ian Nabney (Aston University, UK)

Manfred Opper (Southhampton University, UK)

John Platt (Microsoft Research, USA)

Stephen Roberts (Oxford University, UK)

Bernard Schoelkopf (Max Planck Institute, Germany)

Michael Tipping (Microsoft Research, UK)

Chris Williams (Edinburgh University, UK)

The refereed proceedings of the conference which will be published by

Springer in the series Lecture Notes in Computer Science. The workshop

is supported by grants from the Engineering and Physical

Sciences Research Council, the London Mathematical Society,

Sheffield University, and the PASCAL European Network of

Excellence.

Registration is now open and early registration is encouraged

because (1) there is a limited number of places, and (b) there

is an early bird discount. Registration is available on-line at

www.dcs.shef.ac.uk/ml/workshop/.

For more details, contact the organisers:

Joab Winkler

Mahesan Niranjan

Neil Lawrence

E-mail: mlworkshop@dcs.shef.ac.uk

Department of Computer Science

The University of Sheffield

United Kingdom

------------------------------

From: Ron Boisvert <boisvert@nist.gov>

Date: Mon, 19 Apr 2004 11:41:44 -0400

**Subject: Workshop in Washington on the Changing Face of Mathematical Software**

Workshop on the The Changing Face of Mathematical Software

Washington, DC, USA

June 3-4, 2004

The IFIP Working Group 2.5 (Numerical Software) will be holding

one of its series of regional workshops on June 3-4, 2004 in

Washington, DC on the topic of "The Changing Face of Mathematical

Software". Participants will consider how math software architecture

and interfaces are responding to recent changes in the underlying

platforms, application contexts, as well as in the user community

itself. Speakers include Brian Ford, Ian Gladwell, William Mitchell,

Roldan Pozo, and Pete Stewart. The workshop will be limited to 40

participants. For further details see the workshop web site at

http://math.nist.gov/workshops/wg25-2004/.

------------------------------

From: Stefan Koerkel <stefan@koerkel.de>

Date: Thu, 22 Apr 2004 15:14:56 +0200 (CEST)

**Subject: Workshop in Heidelberg on Parameter Estimation**

Second Call for Participation and Papers

PARAOPE 2004

International Workshop on

Parameter Estimation and Optimal Design of Experiments

Numerical Methods and Applications

June 30 - July 2, 2004

University of Heidelberg, Germany

TOPICS include (but are not restricted to):

Theory of inverse problems

Theory of optimum experimental design

Model validation for dynamic processes

Large scale optimization

Numerical methods

Application problems

INVITED SPEAKERS

U. Ascher (University of British Columbia, Vancouver, Canada)

M. R. Osborne (Australian National University, Canberra, Australia)

V. H. Schulz (University of Trier, Germany)

H. Schwetlick (Technical University of Dresden, Germany)

CONTRIBUTED TALKS

Contributed talks (25 minutes) from researchers working on the

subjects Parameter Estimation and Optimal Design of Experiments will

be presented. Anyone interested in participating is invited to submit

a short abstract (1/2 to 1 page of length).

REGISTRATION

Registration is possible online on the website

www.iwr.uni-heidelberg.de/~agbock/conferences/2004/paraope/

Conference Fee: 100 Euro

to be paid in cash at the conference site.

IMPORTANT DATES

Deadline for Abstract Submission and

Registration: April 30, 2004

Notification of Acceptance: May 17, 2004

Workshop: June 30 - July 2, 2004

CONFERENCE PUBLICATIONS

It is planned to publish selected papers presented at the Workshop

as a special issue of Optimization Methods & Software (OMS) Journal

(http://www.tandf.co.uk/journals/titles/10556788.asp).

INFORMATION

Visit the conference website

http://www.iwr.uni-heidelberg.de/~agbock/conferences/2004/paraope/

ORGANIZATION

This workshop is organized by the Sonderforschungsbereich (SFB) 359

"Reactive Flows, Diffusion and Transport" and by the Postgraduate

Program "Complex Processes: Modelling, Simulation and Optimization" at

the Interdisciplinary Center (IWR) of the University of Heidelberg

Organizers:

H. G. Bock (IWR, University of Heidelberg)

S. Koerkel (IWR, University of Heidelberg)

E. Kostina (IWR, University of Heidelberg)

J. P. Schloeder (IWR, University of Heidelberg)

------------------------------

From: Georgios Stavroulakis <gestavr@cc.uoi.gr>

Date: Tue, 20 Apr 2004 12:50:33 +0300

**Subject: Advanced Short Course in Italy on Nonsmooth Mechanics of Solids**

International Centre for Mechanical Sciences

Centre International des Sciences Mecaniques

NONSMOOTH MECHANICS OF SOLIDS

Advanced School Coordinated by

J. Haslinger, and G.E. Stavroulakis

CISM, Udine, Italy, October 4 - 8, 2004

More details: in http://www.cism.it

Lecturers:

M. Fremond, Ch. Glocker, J. Haslinger, Z. Naniewicz, G.E. Stavroulakis

Short Description:

In many real-life problems coming from engineering or economics one can

encounter nondifferentiable or discontinuous functions and set-valued

mappings. A deep study of the properties of these maps including a

certain generalized differential calculus is the subject of nonsmooth

analysis. We shall focus on some problems in mechanics of solids which

lead to such models.

The classical mechanics (statics and dynamics) of solids provide a large

number of nonsmooth effects: contact problems, collisions, stick-slip

motions connected with friction,

delaminations in composites. All these effects can be mathematically

described by means of differential inclusions. The mathematical research

in this area began at sixties assuming

multivalued parts to be represented firstly by maximal monotone

mappings, i.e. the case leading to variational inequalities. The

monotonicity assumption however turns out to be very restrictive. In

practice, we meet a lot of problems whose basic constitutive laws are no

longer monotone. At the beginning of eighties Prof. P.D. Panagiotopoulos

used tools of nonsmmoth analysis and introduced what he called

hemivariational inequalities (HE). HE's represent an appropriate

mathematical tool enabling us to involve nonmonotone multivalued

relations into the model. Due to HE's, the range of problems which can

be now rigorously treated is enlarged.

The goal of this course is to illustrate the potential of nonsmooth

analysis in modelling of various problems in mechanics of solids. The

emphasis will be laid on the completeness and mathematical

correctness of the presentation, although several industrial

applications will be presented. It will cover the following topics:

nonsmooth modelling of problems in mechanics of solids, the mathematical

theory of variational and hemivariational inequalities, approximation of

variational and hemivariational inequalities by finite element and

boundary element methods, the numerical realization (including smoothing

and regularisation techniques), algorithms and applications from civil

and mechanical engineering and related optimal design and identification

problems.

A number of well-known experts and active researchers in the field,

including mathematicians and engineers, will report on classical and new

results covering all the above mentioned topics. The presentation of all

these topics will be carefully balanced between theory, numerical

methods and applications. The summer school is addressed to graduate

students, PhD candidates and young faculty members in mathematics,

physical sciences and engineering.

Engineers working on advanced applications of computational mechanics

and modelling of highly nonlinear and nonsmooth effects such as contact

and friction problems in industry (civil, aerospace, automotive) as well

as applied mathematicians and computer scientists (dealing with

nonsmooth analysis, optimisation, calculus of variations, computational

mechanics) will benefit from the course.

For more details and application forms, please vistit the web page of CISM

http://www.cism.it

------------------------------

From: Warren R Smith <smithwar@for.mat.bham.ac.uk>

Date: Fri, 23 Apr 2004 10:56:36 +0100 (BST)

**Subject: Faculty Positions at the University of Birmingham**

University of Birmingham

Lectureship in Applied Mathematics (Two Posts)

Applications are invited from strong researchers in any area of

Applied Mathematics, whose research complements and adds breadth

to the Applied Mathematics Group, particularly in the area

of numerical and computational mathematics.

Informal enquiries can be made to Professor J R Blake of the School of

Mathematics and Statistics e-mail: j.r.blake@bham.ac.uk or

telephone: 0121 414 6577 or Professor G R Robinson, Head

of School of Mathematics and Statistics, e-mail: g.r.robinson@bham.ac.uk

or telephone: 0121 414 6581.

Starting salary on scale 22,191 - 33,679 pounds a year depending on

experience and qualifications. In addition, a 9,000 pounds "Golden Hello"

supplement may be available. The posts are available from 1 October 2004.

Application forms (returnable by 14 May 2004) and details from

Personnel Services, The University of Birmingham, Edgbaston,

Birmingham B15 2TT. Tel: 0121 415 9000, web: www.punit.bham.ac.uk/vacancies

Please quote reference S13380.

Working towards equal opportunities.

------------------------------

From: Nick Higham <higham@maths.man.ac.uk>

Date: Mon, 19 Apr 2004 08:47:13 +0100

**Subject: Faculty Position at University of Manchester**

Lectureship in Applied Mathematics, University of Manchester (Ref. 431/04)

As part of its commitment to high quality research and teaching the

School of Mathematics at the University of Manchester invites

applications for a Lectureship in Applied Mathematics, available from

September 1, 2004 or an agreed date thereafter.

Interest in any branch of Applied Mathematics will be considered but

preference may be given to applicants who complement or reinforce the

School's existing strengths in continuum mechanics (solid and fluid

mechanics, waves, granular materials, combustion), dynamical systems,

industrial and biological modelling, inverse problems, financial

mathematics, numerical analysis, astrophysics and geophysics, or who

will enhance collaborative links with other groups within or outside

the University. Candidates should have, or be about to obtain, a

doctorate in an area of applied mathematics.

Salary will be in the range GBP22,191 - GBP25,451 per annum (Lecturer

Grade A) or GBP26,270 - GBP33,679 per annum (Lecturer Grade B) (under review)

For more information, application forms and further particulars, see

http://www.man.ac.uk/news/vacancies/academic.html#431

Informal enquiries may be made to the Head of the School of

Mathematics: Professor Paul Glendinning tel: +44 (0)161-200-8972;

e-mail: p.a.glendinning@umist.ac.uk

or the current Heads of Applied Mathematics: Professor David

Abrahams, tel: +44(0)-161-275-5901; e-mail: i.d.abrahams@ma.man.ac.uk

Professor John Dold tel: +44(0)-161-200-3654;

e-mail: John.Dold@umist.ac.uk

------------------------------

From: Adrian Tate <Adrian.P.Tate@man.ac.uk>

Date: Fri, 23 Apr 2004 18:02:48 +0100 (BST)

**Subject: Staff Position at the University of Manchester**

We have a vacancy for a High Performance Computing Consultant to join the

HPC team at Manchester Computing, University of Manchester.

Manchester Computing supports world class research and teaching in all

disciplines, providing both a local and national supercomputing service

and undertakes research and development in high performance computing,

visualization and e-science.

We are seeking a HPC consultant who relishes the challenge of solving

complex problems on the latest state-of-the-art high performance

computers, and has a desire to provide the best possible service to the

user community.

The successful applicant will specialise in one of the following areas:

Computational Chemistry, Parallel Numerical Software or Computational

Mechanics/Fluid Dynamics

A good degree in an appropriate discipline is required. Experience of

multiprocessor computers, at least as a user, is essential, as is

familiarity with Unix/Linux and a high level programming language.

Experience in code optimisation and parallelisation would be an advantage.

Posts are initially for a period of two years, but with the possibility of

extensions. Starting salary will be in the range GBP 18,265 - GBP 33,679

pa (under review), depending on qualifications and experience.

For an application form and for further information, see

http://www.man.ac.uk/news/vacancies/tech.html#438

The closing date for applications is May 6th.

Adrian Tate

------------------------------

From: W. B. Liu <W.B.Liu@kent.ac.uk>

Date: Sun, 25 Apr 2004 09:30:38 +0100 (BST)

**Subject: Vacancies at University of Kent**

THE UNIVERSITY OF KENT - CANTERBURY BUSINESS SCHOOL

Professor/Reader - computational management science, mathematical

Programming, OR, stochastic optimisation, Systems (ref.A04/60)

Reader/Senior Lecturer (ref. A04/61)

Two Lecturers (ref. A04/62&63)

Location: Kent

Salary: Professor: minimum L40,841, Reader: L35,251 - L44,084

Senior Lecturer: L35,251 - L39,958pa; Lecturer: L22,191 - L33,679 pa;

Date posted: 20 Apr 04

Closing date: 21 May 04

Job description

Canterbury Business School (soon to be called Kent Business School) is

undertaking a major development programme. This year we have made three

senior appointments - Martyn Jones as Director, Professor John Mingers as

Director of Research and Professor Paul Phillips as Deputy Director - as

well as six new lecturerships. We are helping to shape the new Transmanche

University in collaboration with four French institutions and are also

part of the University's establishment of a new campus at the Medway. The

MBA Programme is being redeveloped to include a modular version and a

public sector MBA. We have recently been awarded ESRC 1+3 PhD quotas and

the University received a greater increase in HEFCE funding than any

other.

The Business School is situated in the historic city of Canterbury and has

excellent links with London and Europe.

We now wish to move into the second phase of development to strengthen our

research profile with these appointments, mainly at senior levels. We

would be interested to hear from applicants across the field of management

who can demonstrate a strong commitment to research, but are particularly

interested in making appointments in the following areas. Applicants for

senior positions will have a track record of successful publication in

international refereed academic journals.

Particular areas of interest are mathematical programming/DEA, simulation,

soft OR/systems, statistics/forecasting, CRM/yield management, heuristics.

The senior post would involve an active role in course development and

mentoring of junior colleagues. To discuss these jobs please contact

Prof. John Mingers (J.Mingers@kent.ac.uk) or Prof. (Steve) WB Liu

(W.B.Liu@kent.ac.uk). Further particulars will soon be available on

http://www.kent.ac.uk/registry/personnel/vacancies.htm

Professor: minimum L40,841 pa;

Reader: L35,251 - L44,084 pa;

Senior Lecturer: L35,251 - L39,958 pa;

Lecturer: L22,191 - L33,679 pa;

Some of the post carry an additional salary supplement for new lecturers

who meet certain criteria.

Closing date for receipt of applications is Friday 21 May 2004.

Interviews are likely be held in June/July.

We actively promote equal opportunity in education and employment and

welcome applicants from all sections of the community.

UNIVERSITY OF KENT - POSITIVE ABOUT DISABLED PEOPLE

------------------------------

From: Piet Wesseling <P.Wesseling@ewi.tudelft.nl>

Date: Tue, 20 Apr 2004 10:19:33 +0200

**Subject: Assistant Professorship at Delft University of Technology**

Assistant Professor in Numerical Analysis (permanent position)

Department of Applied Analysis

Faculty of Electrical Engineering, Mathematics and Computer Science

Delft University of Technology

The Department of Applied Analysis of Delft University of Technology in The

Netherlands has an open permanent position for an Assistant Professor

(Universitair Docent) in Numerical Analysis. The Assistant Professor will

belong to the Numerical Group, chaired by P. Wesseling. The Numerical Group

engages in teaching and research in the field of numerical analysis and

applications in the engineering sciences. The Group participates in the

teaching programs for the BSc and MSc degrees in Applied Mathematics, and for

engineering degrees in the University. Research is carried out in the field of

computational science and engineering. An important part of the research is

done by PhD students, is externally financed and is performed in cooperation

with partners from other disciplines and industry. Some of the current

problems we are working on include free boundary problems in materials

science, computational and mathematical modelling of optical recording,

efficient methods for large sparse systems of equations, and unstructured grid

methods in computational fluid dynamics.

Requirements include a PhD degree in applied mathematics or a subject in the

computational sciences, and preferably a few years of postdoctoral research

experience; research skills shown by publications of high quality; affinity

and experience with or aptitude for teaching; good communication skills and

interest in interdisciplinary work.

Tasks will include both research and teaching on a fifty-fifty basis.

For further information one may contact Professor P. Wesseling, phone

+3115 2783631, email P.Wesseling@ewi.tudelft.nl, or Ms G.M. Mense-Baars, phone

+3115 2783351, email G.M.Mense-Baars@ewi.tudelft.nl

See also

http://administration.its.tudelft.nl/scripts/pno/new_vacature_lijst.asp

Applications are to be sent to the Faculty of Electrical Engineering,

Mathematics and Computer Science, Afdeling P&O, Mekelweg 4, 2628 CD Delft, The

Netherlands. Please include the vacancy number EWI 2004.13 in the upper left

corner of your letter.

Closing date: May 15 2004

------------------------------

From: Ron Boisvert <boisvert@nist.gov>

Date: Mon, 19 Apr 2004 15:47:30 -0400

**Subject: Contents, ACM Transactions on Mathematical Software**

Table of Contents

ACM Transactions on Mathematical Software

March 2004, Volume 30, Number 1

For more information, including abstracts and access

to full text, see http://www.acm.org/toms/V30.html.

S. Gonzalez-Pinto, J.I. Montijano, and S. Perez-Rodriguez

Two-Step Error Estimators for Implicit Runge-Kutta Methods Applied

to Stiff Systems

1-18

Vladimir Rotkin and Sivan Toledo

The Design and Implementation of a New Out-of-Core Sparse Cholesky

Factorization Method

19-46

A. Ismael F. Vaz, Edite M. G. P. Fernandez, and M. Paula S. F. Gomez

SIPAMPL: Semi-Infinite Programming with AMPL.

47-61

Roscoe A. Bartlett, Bart G. Van Bloemen Waanders, and Michael A. Heroux

Vector Reduction/Transformation Operators.

62-85

R. J. Hanson and Tim Hopkins

Algorithm 830: Another Visit with Standard and Modified Givens

Transformations and a Remark on Algorithm 539.

86-94

------------------------------

From: Science Direct <sciencedirect@prod.lexis-nexis.com>

Date: Thu, 22 Apr 2004 07:26:11 -0400 (EDT)

**Subject: Contents, Nonlinear Analysis**

Nonlinear Analysis Volume 57, Issue 1, Pages 1-152 (April 2004)

TABLE OF CONTENTS

On the second part of Hilbert's 16th problem, Page 1

E. Oxenhielm

The number of bifurcation points of a periodic one-parameter ODE with at most two periodic solutions, Pages 3-22

J.L.Jose L. Bravo, Manuel Fernandez and Antonio Tineo

Random fixed points of uniformly Lipschitzian mappings, Pages 23-34

P.L.P. Lorenzo Ramirez

An alternating projection that does not converge in norm, Pages 35-61

H.S.Hein S. Hundal

Comparison principles for parabolic differential-functional initial-value problems, Pages 63-84

Agnieszka Bartomiejczyk and Henryk Leszczyski

On characterization of convexity for regularly locally Lipschitz functions, Pages 85-97

Duan Bednaik and Karel Pastor

The natural best approximant in Orlicz spaces of Young measures, Pages 99-110

C.C.Cristian Constantin Popa

Global asymptotic stability of a class of nonautonomous integro-differential systems and applications, Pages 111-135

Meng Fan and Xingfu Zou

Wave breaking for a shallow water equation, Pages 137-152

Yong Zhou

------------------------------

From: Claude Brezinski <claude.brezinski@univ-lille1.fr>

Date: Thu, 22 Apr 2004 13:55:35 +0200

**Subject: Contents, Numerical Algorithms**

CONTENTS

Numerical Algorithms

April 2004, Volume 35 (Issue: 2-4) ISSN: 1017-1398

Theory and Practice in Optimization

Guest Editors: Jose Mario Martinez, Jin Yun Yuan

137 Preface

J.M. Martinez, Jin Yun Yuan

139 Conjugate Gradient Method for Rank Deficient Saddle Point Problems

X. Wu, B.P.B. Silva, J.Y. Yuan

155 A Computational Study of Global Algorithms for Linear Bilevel

Programming

C.H.M. de Saboia, M. Campelo, S. Scheimberg

175 Some Inexact Hybrid Proximal Augmented Lagrangian Algorithms

C. Humes Jr., P.J.S. Silva, B.F. Svaiter

185 Properties of the Central Points in Linear Programming Problems

C.C. Gonzaga, M. Cardia

205 Error Estimates for Two Filters Based on Polynomial

Interpolation for Recovering a Function from Its Fourier Coefficients

Musheng Wei, A.R. De Pierro, Jiahong Yin

233 A New Approach to a Multicriteria Optimization Problem

W. Sosa, F.M.P. Raupp

249 On Restart Procedures for the Conjugate Gradient Method

Yu-Hong Dai, Li-Zhi Liao, Duan Li

261 Recent Applications and Numerical Implementation of

Quasi-Newton Methods for Solving Nonlinear Systems of Equations

R. Perez, V.L. Rocha Lopes

287 A Function to Test Methods Applied to Global Minimization of

Potential Energy of Molecules

C. Lavor, N. Maculan

301 L-Curve and Curvature Bounds for Tikhonov Regularization

D. Calvetti, L. Reichel, A. Shuibi

315 Using a Conic Formulation for Finding Steiner Minimal Trees

M. Fampa, N. Maculan

331 An Acceleration Scheme for Solving Convex Feasibility Problems

Using Incomplete Projection Algorithms

N. Echebest, M.T. Guardarucci, H. Scolnik, M.C. Vacchino

351 A Class of Nested Iteration Schemes for Linear Systems with a

Coefficient Matrix with a Dominant Positive Definite Symmetric Part

O. Axelsson, Zhong-Zhi Bai, Shou-Xia Qiu

373 A Genetic Algorithm for Solving a Capacitated p-Median Problem

E. Santos Correa, M.T.A. Steiner, A.A. Freitas, C. Carnieri

------------------------------

End of NA Digest

**************************

-------