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

- Special Issue of Linear Algebra and its Applications
- Cambridge Approximation Day
- Industrial days at CERFACS on Inner-Outer iterations
- Block Lecture Supercomputing in July 2000
- Conference in Bulgaria on Large-Scale Scientific Computations
- Position at DRW Investments, Chicago

**URL for the World Wide Web:**
http://www.netlib.org/na-net/na_home.html

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From: Hans Schneider <hans@math.wisc.edu>

Date: Wed, 10 May 2000 08:27:42 -0500 (CDT)

**Subject: Special Issue of Linear Algebra and its Applications**

Linear Algebra and its Applications

Special Issue on

STRUCTURED AND INFINITE SYSTEMS OF LINEAR EQUATIONS

Deadline extension

The scope of the 'Special Issue on 'Infinite Linear Systems

of Equations finitely specified' with deadline June 1st

has been slightly extended to include very large structured

systems and methods that may lead to the treatment of

infinite systems. There have already been submissions

to the previously announced special issue which

fit the extended scope. We wish to give all potential authors

the chance to submit papers fitting the broader scope and

are therefore extending the deadline for submission

to August 31st. The new, slightly adapted description of

the special issue reads as follows:

One of the traditional hunting grounds of linear algebra is

the area of finite systems of linear equations, as described by a

matrix equation $Ax = b$. Here $A$ is a known matrix,

$b$ a known vector of finite dimensions, and $x$ is an unknown

vector of finite dimensions, which is to be determined such

that the equation is either satisfied, or, if that is not possible,

approximately satisfied. Many techniques are known for finding solutions

or approximate solutions, depending on the properties of the

given data and the approximation technique choosen.

If the system of equations is not finite, i.e. $A$ is not a matrix

but an operator, and $b$ and $x$ are of infinite dimension, then

algebraic and numerical techniques can still be used provided the

given data are finitely specified. Operators with such a property

are often called 'structured operators', and it turns out that

one can solve such infinite equations in an exact or approximate sense using

finite methods and algorithms. Also in the case of very large

structured matrices, methods can be devised that are in principle

extendable to the infinite case.

The conjunction of linear algebra and inversion theory for finitely

specified infinite operators brings interesting connections to the

forefront: algebraic equivalents of inner-outer factorizations e.g.,

or the algebraic significance of Kalman filtering. Structured matrices

can be of many types, e.g. systems with finite displacement ranks or

time-varying systems with state spaces of finite dimensions and whose

limiting behaviour is known, e.g. as a time invariant system.

A non-limiting list of topics of interest in this area is (assuming

$A$ is an infinite but finitely described operator of some kind):

- inversion methods

- decomposition methods for the operator A

- quadratic approximation methods

- complexity reduction

- equivalencies

- canonical forms

- transform techniques.

Examples of operator structure:

- systems with low displacement rank

- finitely described time-varying systems

- finitely described almost-periodic systems

- differentials of non-linear systems.

Interested authors are kindly invited to submit full papers with

significant contributions to this area to any of the three

guest editors listed below before August 31st, 2000.

Patrick Dewilde

DIMES, Delft University of Technology

POB 5031,

2600GA Delft, the Netherlands.

Fax: +31 15 262 3271

email: dewilde@DIMES.tudelft.nl

Vadim Olshevsky

Department of Mathematics and Computer Science

Georgia State University

University Plaza

Atlanta, GA 30303, USA

Fax: +1 404 651 2246

email: volshevsky@cs.gsu.edu

Ali Sayed

Rm 44-123A Engr. IV Bldg

Dept. of Electrical Engineering

University of California

Los Angeles, CA 90095-1594, USA

Fax: +1 310 206 8495

email: sayed@biruni.icsl.ucla.edu

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

From: Mike Powell <M.J.D.Powell@damtp.cam.ac.uk>

Date: Fri, 19 May 00 12:46:07 BST

**Subject: Cambridge Approximation Day**

CAMBRIDGE APPROXIMATION DAY

Wednesday, June 21st, 2000

An informal meeting on Approximation will be held in DAMTP, University

of Cambridge, England on June 21st, the titles of talks (and speakers)

being as follows:

Approximation on manifolds (Jeremy Levesley, Leicester),

Multilevel approximation (Steve Hales, Leicester),

Some links between different iterative methods for radial basis

function interpolation (Anita Faul, Cambridge),

New results on the characterization of native spaces for radial

basis functions (Hans-Martin Gutmann, Cambridge), and

Scattered data interpolation from principal shift-invariant

spaces (Michael Johnson, Kuwait).

There is no registration fee, and anyone who is interested will be

welcome to attend the meeting. Further information is available at

www.damtp.cam.ac.uk/user/na/App_day.html.

M.J.D. Powell

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

From: Valerie Fraysse <Valerie.Fraysse@cerfacs.fr>

Date: Mon, 15 May 2000 09:04:14 +0200 (MET DST)

**Subject: Industrial days at CERFACS on Inner-Outer iterations**

Industrial days at CERFACS on Inner-Outer iterations

Numerical quality of software coupling

September 11--12, 2000

CERFACS, Toulouse, France

Keynote speaker: Prof. G. Golub, Stanford.

Invited speakers: Prof. S. Hammarling, Nag, Oxford.

Prof. A. Griewank, Dresden.

Embedded iterative solvers are ubiquitous in numerical simulation. There

is a great need by industry for better control of inner-outer iterations

These two industrial days will give an opportunity for the industrial

and academic representatives to review the state-of-the-art

and define together promising research directions for embedded solvers.

Scientific committee:

CERFACS: F. Chaitin-Chatelin, I.S. Duff, V. Fraysse, L. Giraud,

and E. Traviesas.

Industry: J.-C. Berges (CNES), Ph. Homsi (Aerospatiale),

and J.-L. Vaudescal (EDF).

Local arrangements: B. Yzel and E. Traviesas.

For more information, visit the website: www.cerfacs.fr/algor or e-mail

B. Yzel (yzel@cerfacs.fr).

This workshop is organized with the collaboration of Aerospatiale,

CNES (CCT 1) and EDF.

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

From: Willi Schoenauer <schoenauer@rz.uni-karlsruhe.de>

Date: Wed, 17 May 2000 16:38:38 +0200

**Subject: Block Lecture Supercomputing in July 2000**

Block Lecture Supercomputing in July 2000

Scientific Supercomputing: Architecture an Use of Shared and Distributed

Memory Supercomputers (in English)

(1637 + 1638, 2 +2 SWS)

Bock lecture in the week 31.7. - 4.8.2000

Location: Seminarraum 217 in the Computer Center of the Universitaet

Karlsruhe, 2nd floor, building 20.21

Time: Mo - Fr 8.30 - 10.00, 10.30 - 12.00 h

Mo - Tu 14.30 - 16.00 h

Schoenauer/Haefner: Exercises in Seminarraum 217 and terminal room, Mo

16.30 - 19.00 and futher terms

Background: Supercomputers are built by connecting vector pipelines or

microprocessors by a communication network. The theoretical peak performance

now is more than 1 TFLOPS (teraflops, 1E12 floating-point operations per

second). These parallel computers are used for the numerical simulation in

all technical and scientific areas: crash tests for automobiles, weather

forecast, elementary particke physics, drug design etc. The progress in

science and technology is essentially determined by this new "Computational

Science". At the Universitaet Karlsruhe and the Forschungszentrum Karlsruhe

are installed an IBM RS/6000 SP and a Siemens/Fujitsu VPP300 + 5000. At LRZ

Munic a Hitachi SR8000 with more than 1TFLOPS is available for German

scientists. You should terefore get aquainted with the usage of such

supercomputers.

Contents: The contents of the lecture and how to obtain the manuscript can

be seen at the URL

http://www.uni-karlsruhe.de/~rz03/book/

It should be mentioned that there is an open-ended (hand-written) ADDENDUM

to this basic lecture where new architectures and algorithms are published.

It is accessible bythe above URL.

Prerequisite for the exercises is the basic knowledge of UNIX and Fortran.

There is no necessity of registration for students of Karlsruhe. External

participants should send an e-mail. Information about the Computer Center

is under the URL

http://www.rz.uni-karlsruhe.de/

The next term will be 19. - 23.2.2001

Willi Schoenauer

Rechenzentrum der Universitaet Karlsruhe

D-76128 Karlsruhe, Germany

Tel: +49/721/608-6350

Fax: +49/721/32550

Email: schoenauer@rz.uni-karlsruhe.de

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

From: Svetozar Margenov <margenov@parallel.bas.bg>

Date: Fri, 19 May 2000 13:14:55 +0300 (DST)

**Subject: Conference in Bulgaria on Large-Scale Scientific Computations**

Third International Conference on "Large-Scale Scientific Computations"

ICLSSC, June 6-10, 2001, Sozopol, Bulgaria

The Central Laboratory on Parallel Processing, Bulgarian Academy of Sciences

in cooperation with the Division of Numerical Analysis and Statistics, Rousse

University, will organize the next ICLSSC. This third in a row scientific

meeting is planned to have two special tracks:

I. Computational Linear Algebra

II. LSSC of Engineering and Environmental Problems

Specific topics of interest (but not limited to) are the following:

1. Hierarchical, adaptive, domain decomposition and local refinement methods

2. Robust preconditioning algorithms

3. Monte-Carlo methods and algorithms

4. Numerical linear algebra

5. Methods and algorithms for inverse problems

6. Large-scale computations of environmental problems

7. High-performance algorithms for engineering problems

8. Large-scale computations of data processing

9. Parallel algorithms and performance analysis

Following the already established tradition, up to eight special sessions will

be incorporated in the scientific program of the conference. Applications

related to the special tracks of the conference as well as in some more specific

and/or advanced topics of the LSSC and their applications will be considered.

WWW-site. http://copern.bas.bg/Conferences/SciCom01.html

E-mail: scicom01@parallel.bas.bg

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

From: Lester Ingber <ingber@ingber.com>

Date: Sun, 14 May 2000 17:47:55 -0500

**Subject: Position at DRW Investments, Chicago**

Programmer/Analyst in Computational Finance. DRW Investments

[www.drwtrading.com], 311 S Wacker Dr Ste 900, Chicago IL 60606.

At least 2-3 years combined experience programming in C/C++, Visual

Basic/VBA and Java, as well as financial industry experience with a

financial institution. Must have excellent background in Physics, Math,

or similar disciplines, PhD preferred. Needs practical knowledge of

methods of field theory and stochastic differential equations, as well

as an understanding of derivatives pricing models, bond futures and

modeling of financial indices. The position will be primarily dedicated

to developing and coding algorithms for automated trading. Flexible hours

in intense environment. Requires strong commitment to several ongoing

projects with shifting priorities.

See www.ingber.com for some papers on current projects. Please email

Lester Ingber ingber@drwtrading.com a resume regarding this position.

Lester Ingber <ingber@ingber.com> http://www.ingber.com/

PO Box 06440 Wacker Dr PO Sears Tower Chicago IL 60606-0440

<ingber@alumni.caltech.edu> http://www.alumni.caltech.edu/~ingber/

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

End of NA Digest

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