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

- NA Digest Calendar
- The Effect Matrix Size on Condition
- Maximizing a Determinant Subject to Constraints
- Web Resource and New Book on Level Set Methods
- Spin Glass Server Using a Branch and Cut Algorithm
- PARA96, Call for Abstracts and Registration
- Workshop on Theoretical and Numerical Fluid Dynamics
- Stieltjes Workshop on High Performance Optimization Techniques
- Advances in Computational Fluid Dynamics
- Structured Matrices in Filtering and Control
- Position at University of the Witwatersrand
- Postdoctoral Position at Rutherford Appleton Laboratory
- Postdoctoral Position at Carnegie Mellon University
- Position at Sandia National Laboratories
- Position at United Technologies Research Center
- Position at University of Tennessee
- Contents, SIAM Applied Mathematics
- Contents, SIAM Matrix Analysis and Applications

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

From: NA Digest <na.digest@na-net.ornl.gov>

Date: Thu Jun 6 18:04:10 EDT 1996

**Subject: NA Digest Calendar**

The Netlib Conferences Database is on the Web at:

http://www.netlib.org/confdb/Conferences.html

NA Digest Calendar

Date Topic Place NA Digest #

June 3- 8 Domain Decomposition Methods Bergen, Norway 10

June 5- 7 Short Course in Acoustics Montreal, Canada 12

June 10-13 CERFACS Workshop Toulouse, France 18

June 10-15 Honor Lax and Nirenberg Venice, Italy 95:29

June 11-14 Numerical Fluid Flow Breckenridge, CO 95:37

June 13-15 Algebraic Multilevel Iteration Nijmegen, Netherlands 17

June 15-19 Hyperbolic Problems Hong Kong 95:36

June 17-20 Integral Methods in Science and Engin. Oulu, Finland 95:24

June 17-20 Discrete Mathematics Baltimore, MD 15

June 17-21 Householder XIII Symposium Pontresina,Switz. 95:31

June 20-22 Memorial Conference D.S. Mitrinovic Nis, Serbia 13

June 23-26 Computational Physics Beijing, China 01

June 24-25 Stockholm Optimization Days Stockholm, Sweden 03

June 24-28 Short Course in CFD Ruston, LA 22

June 24-27 Numerical Analysis Rousse, Bulgaria 17

June 24-28 Networks and Systems Saint Louis, MO 52

June 26-28 Time-Frequency Methods for Finance Geneva, Switzerland 47

June 26-28 Images, Wavelets and PDE's Paris, France 41

June 29... Sparse Linear Systems Gran Canaria, Spain 06

June 29... Summer Program for Undergraduate Women Wasington, DC 09

July 1- 2 MPI Users Group Notre Dame, IN 52

July 1- 3 Celebration of Women in Math Berkeley, Ca 18

July 1- 4 Finite Element Methods Jyvaskyla, Finland 44

July 1- 5 Grid Adaptation Edinburgh, Scotland 13

July 2 Wavelets Tokyo, Japan 19

July 7-11 ASME Fluids Engineering Division San Diego, CA 95:35

July 8-12 Prague Mathematical Conference Prague, Czech Rep. 95:03

July 8-12 Quality of Numerical Software Oxford, England 19

July 8-19 Numerical Analysis Summer School Leicester, England 41

July 9-12 Monte Carlo Methods Salzburg, Austria 45

July 10-13 Computer-Aided Molecular Design Ithaca, NY 17

July 11-17 Numerical Linear Algebria Split, Croatia 51

July 15-19 Computational Mechanics Miskolc, Hungary 48

July 15-17 Finite Volumes Rouen, France 08

July 17-20 Applications of Computer Algebra Hagenberg, Austria 11

July 21-26 Computational and Applied Mathematics Leuven, Belgium 51

July 22-27 Summer Seminar on Plates and Shells Quebec, Canada 10

July 22-26 SIAM Annual Meeting Kansas City, MO 06

July 22-27 Canadian Mathematical Society Quebec, Canada 44

July 22-26 Summer Seminar Plates and Shells Quebec, Canada 20

July 24-26 Symbolic and Algebraic Computation Zurich, Switzerland 15

July 27-30 Conference Honoring Mike Powell Cambridge, England 45

July 29-.. Theoretical and Numerical Fluid Dynamics Vancouver, Canada 22

Aug. 1- 3 Structured Matrices Santa Barbara, CA 22

Aug. 5- 7 Computational Fluid Dynamics Hampton, VA 17

Aug. 5-13 Industrial Mathematics Modeling Raleigh, NC 13

Aug. 7- 8 Brazil Interval Workshop Recife, Brazil 18

Aug. 14-17 International Linear Algebra Society Chemnitz, Germany 15

Aug. 18-21 Applied Parallel Computing Lyngby, Denmark 20+22

Aug. 19-21 High Performance Computing Ithaca, NY 21

Aug. 19-21 Parallel Irregular Problems Santa Barbara, CA 44

Aug. 21-25 Total Least Squares Leuven, Belgium 13

Aug. 23 Computational Finance Conference Palo Alto, CA 02

Aug. 25-31 Congress Theor. & Appl. Mechanics Kyoto, Japan 94:46

Aug. 27-29 Parallel Numerical Algorithms Lyon, France 04

Aug. 27-29 Programming Environment and Tools Lyon, France 06

Sep. 1- 5 Numerical Solution of ODEs Halle, Germany 13

Sep. 2- 5 Nonlinear Programming Beijing, China 04

Sep. 4- 6 Multidisciplinary Analysis Bellevue, WA 05

Sep. 4- 6 Operations Research Braunschweig, Germany 10

Sep. 8-11 Computing in Europe on IBM Platforms Krakow, Poland 14

Sep. 9-13 "Diskrete Optimierung" Hamburg, Germany 18

Sep. 9-13 Computational Methods Applied Sciences Paris, France 15

Sep. 9-14 Inverse and Ill-Posed Problems Moscow, Russia 01

Sep. 9-27 Numerical Simulation of PDEs Trieste, Italy 04

Sep. 15-17 Control System Design Dearborn, MI 43

Sep. 16-18 Modern Software Tools Oslo, Norway 20

Sep. 16-18 Multivalued Eikonal Solvers Rocquencourt, France 06

Sep. 16-21 Computational Modelling Dubna, Russia 07

Sep. 17-20 Italian Operational Research Society Perguia, Italy 05

Sep. 18-20 Virtual Systems and Multimedia Gifu, Japan 14

Sep. 19-29 High Performance Optimization Techniques Delft, Netherlands 22

Sep. 25-27 Vector and Parallel Processing Porto, Portugal 51

Sep. 25-27 Dutch Numerical Mathematics Zeist, Netherlands 19

Sep. 23 Computational Mathematics Glasgow, Scotland 18

Sep. 23-27 Inverse Problems in Wave Propagation Aix les Bains, France 03

Sep. 24-26 Boundary Element Method Braga, Portugal 03

Sep. 24-27 Modeling Issues for Environment Albuquerque, NM 07

Sep. 26-28 Computer Mathematics Athens, Greece 09

Sep. 30... Interval Methods Wuerzburg, Germany 13

Oct. 1- 4 European Multigrid Conference Stuttgart, Germany 20

Oct. 9-11 Paralleles und Verteiltes Rechnen Braunschweig, Germany 14

Oct. 9-11 SIAM Conference on Sparse Matrices Coeur d'Alene, ID 16

Oct. 10-11 International Meshing Roundtable Pittsburgh, PA 15

Oct. 20-23 High Performance Computing Tempe, AZ 01

Nov. 6- 8 Innovative Time Integrators Amsterdam, Netherlands 40

Dec. 17-19 Mathematics in Signal Processing Warwick, England 48

1997

Jan. 5- 7 Discrete Algorithms New Orleans, LA 15

Jan. 5-12 Computational Mathematics Rio de Janeiro, Brazil 08

Jan. 5-12 Numerical Linear Algebra Rio de Janeiro, Brazil 13

Jan. 24-26 Multi-Scale Problems Kiel, Germany 21

Jan. 27-31 Maths-in-Industy Study Group Melbourne, Australia 11

Mar. 16-21 Approximation and Optimization Caracas, Venezuela 21

Mar. 21-22 AMS Session on Approximation Theory Memphis, TN 11

Apr. 1- 3 Monte Carlo Methods Brussels, Belgium 16

Apr. 6-11 Multigrid Copper Mountain, CO 19

May 26-30 Computational Heat Transfer Cesme, Turkey 05

June 16-18 Mathematical Issues in Geosciences Albuquerque, NM 18

June 24-27 Dundee NA Conference Dundee, Scotland 13

July 14-18 Theoretical and Computational Acoustics New York, NY 14

Aug. 24-29 IMACS World Congress Berlin, Germany 07

Sep. 15-19 Scientific Computing & Diff. Eqns. Grado, Italy 49

Sep. 29-.. ENUMATH-97 Heidelberg, Germany 50

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

From: Gary Howell <howell@zach.fit.edu>

Date: Sun, 2 Jun 96 14:12:31 -0400

**Subject: The Effect Matrix Size on Condition**

Dear Nanetters,

I am interested in the question of conditioning with respect to

problem size.

Hypothesis: for a given class of scalalble problems, conditioning

of the problem is a function of problem paramaters, in particular problem

size. This hypothesis is for example well-studied for randomly generated

matrices. Provided entries are

normally distributed or uniformly distributed with mean zero and

standard deviation one) then condition of n x n matrices is a bit worse

than n. This was the subject of Alan Edelman's dissertation. Conditioning

of the eigenvalues is a related and not quite as well resolved question.

On the other hand, if Gaussian multipliers are randomly generated

and multiplied together in the sequence of Gaussian elimination, conditioning

of the resulting lower triangular matrix increases exponentially (Trefethen

and Schreiber, SIMAX early 1990s) with matrix size. Though typically

the L of an LU decomposition with pivoting has a much more reasonable

increase with matrix size.

Another example for which a good deal is known is the linear

equations resulting from backward difference solution of the parabolic

partial differential equation u_t = u_xx . For the 1-D problem, conditioning

goes like n squared provided nodes are equally spaced. 2-D problems and

3-D problems can also be analyzed.

Question: for what other examples is analysis easy and/or

experimental results available?

I hope to compile a list of problems for which the relation of

conditioning and problem size is well-known and make a summary available

to Na-Net with a more complete document available by anonymous ftp. Please

reply by e-mail and give some indication of what literature

is available. For experimental results, please include a range of

problem sizes tried, by whom, on what machine, etc.

Also, I hope to make a related poster presentation at the summer

SIAM conference in Kansas City.

Sincerely, Gary Howell howell@zach.fit.edu

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

From: Lieven Vandenberghe <vandenbe@isl.stanford.edu>

Date: Sat, 25 May 1996 15:00:17 -0700 (PDT)

**Subject: Maximizing a Determinant Subject to Constraints**

Determinant maximization with linear matrix inequality constraints.

Software and paper available.

The problem of maximizing the determinant of a matrix subject to linear

matrix inequalities arises in many fields, including computational

geometry, statistics, system identification, experiment design, and

information and communication theory. It can also be considered as

a generalization of the semidefinite programming problem and of the

analytic centering problem.

A software package (MAXDET) and a survey paper are now available via

anonymous ftp. The software includes an implementation of an

interior-point method in C, with calls to LAPACK, as well as some

MATLAB routines that work with a mex-file interface.

To get the software, ftp as anonymous to isl.stanford.edu, and cd to

pub/boyd/maxdet. Set binary mode and get the file maxdet.tar.Z (which

includes maxdet.ps.Z, the paper), and the appropriate mex-file. Quit

ftp, then uncompress and untar maxdet.tar.Z:

% zcat maxdet.tar.Z | tar xvf -

You will then have a directory maxdet which contains the survey paper,

source code, (postscript) software documentation, source for MATLAB

mex interfaces, and example MATLAB files.

You can get the paper alone in pub/boyd/reports, in the file

maxdet.ps.Z.

You can also get the package and the paper via WWW, by following the

links from http://www-isl.stanford.edu/people/boyd/group_index.html.

The MAXDET code has also been incorporated in SDPSOL, a parser/solver

that solves semidefinite programming problems that are described in

a simple Matlab-like language.

Comments, suggestions and bug reports are welcome.

Lieven Vandenberghe, Stephen Boyd and Shao-Po Wu

vandenbe@isl.stanford.edu, boyd@isl.stanford.edu, clive@isl.stanford.edu

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

From: Alan Harvey <harvey@csli.Stanford.EDU>

Date: Fri, 31 May 1996 11:48:06 -0700

**Subject: Web Resource and New Book on Level Set Methods**

Announcing a Web Resource and New Book on Level Set Methods

THE WEB RESOURCE:

http://math.berkeley.edu/~sethian/level_set.html

A general introduction to level set methods and their application,

including interactive Java applets and MATLAB-generated MPEG movies.

A URL which describes level set methods in detail, both for the novice and

the expert, may be found at http://math.berkeley.edu/~sethian/level_set.html.

This site describes both the level set method and the fast marching method,

and includes a large number of MATLAB-generated MPEG movies demonstrating

the algorithms in action, and interactive Java applets exhibiting phenomena

in geometry, medical imaging, robotic navigation, two phase fluid flow,

image processing, and manufacturing of computer chips. A complete description

of the book and ordering information may also be found at this site.

THE BOOK:

Level Set Methods:

Evolving Interfaces in Geometry, Fluid Mechanics,

Computer Vision and Materials Science

by

J.A. Sethian,

Published by Cambridge University Press 1996

Cambridge Monographs on Applied and Computational Mathematics, 3

This book is an introduction to level set methods, which are numerical

techniques for analyzing and computing interface motion in a host of

settings. The numerical techniques can be used to track three-dimensional

complex fronts that develop sharp corners and change topology as they

evolve. The text includes applications from geometry, physics, chemistry,

fluid mechanics, combustion, image processing, materials science, seismology,

fabrication of microelectronic components, computer vision, control

theory, and robotic navigation.

The text is an equal blend of theory, implementations, and applications

areas, and includes detailed descriptions of the appropriate numerical schemes.

The book is intended for mathematicians, applied scientists, practicing

engineers, computer graphic artists, and anyone interested in the evolution

of boundaries and interfaces; no previous expertise in level set methods

or front tracking schemes is assumed.

To be published in Hardback in June 1996

ISBN 0-521-57202-9

6 x 9 220 pp. 92 figures

Cambridge Monographs on Applied and Computational Mathematics 3

Orders: http://www.cup.org/Reviews&blurbs/sethian.html

Enquiries: harvey@roslin.stanford.edu

OUTLINE

Part one: Equations of Motion for Moving Interfaces

Part two: Approximation Schemes for Level Set Methods

Part three: Viscosity Solutions, Hamilton--Jacobi Equations, and Fast

Marching Level Set Methods

Part four: Applications

Dr Alan Harvey tel: 415-723-0665

Editor, Mathematical Sciences fax: 415-723-0625

Cambridge University Press email: harvey@roslin.stanford.edu

Press Building http://www.cup.org

Stanford University

Stanford CA 94305-2235

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

From: Martin Diehl <diehl@informatik.uni-koeln.de>

Date: Fri, 31 May 1996 08:37:29 +0200 (MET DST)

**Subject: Spin Glass Server Using a Branch and Cut Algorithm**

At the Universitaet zu Koeln we have installed a Spin Glass Server (SGS).

This server solves instances of the problem of finding an exact ground

state of physical systems called spin glasses. This problem can be

transformed into an maximum cat problem which is solved using a

branch and cut algorithm. Our server has an E-Mail interface.

We think, it might be useful for some researchers to use our algorithm

which finds the optimal solutions quite quickly.

More information about SGS can be found at:

http://www.informatik.uni-koeln.de/ls_juenger/projects/sgs.html

or by sending an empty mail with subject line: help to:

spinglass@informatik.uni-koeln.de

This service is provided by the group of Prof. Dr. Michael Juenger at

the Institut fuer Informatik of the Universitaet zu Koeln. General

information about spin glasses and what they have to do with

optimization can be found at:

http://www.informatik.uni-koeln.de/ls_juenger/projects/spinglass.html

Martin Diehl.

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

From: Jerzy Wasniewski <unijw@unidhp1.uni-c.dk>

Date: Thu, 6 Jun 1996 22:00:52 +0200 (METDST)

**Subject: PARA96, Call for Abstracts and Registration**

We have employed the "International Conference Services A/S" company,

ICS, for the PARA96 registration and hotel reservation. The ICS requires

all the PARA96 participants (including invited speakers and local

attendants) must fill in the PARA96 "Registration and Hotel Reservation

Form". You can do this either on-line on the PARA96 Website

http://webhotel.uni-c.dk/para/para96.html

or sending the "Registration and Hotel Reservation Form" with your

signature either by

Fax: +45 39 46 05 15

or by the snail mail to ICS. Please fill in the "Registration and Hotel

Reservation Form" soon as possible otherwise we can have problems with

the accommodation.

There are still possibility to submit a short abstract either for a 20

minutes communication or for a poster. The dead line, June 15 is very soon.

Best regards,

Jerzy

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

From: Fluids Conference Account <fluid@math.ubc.ca>

Date: Mon, 27 May 1996 14:18:49 -0700

**Subject: Workshop on Theoretical and Numerical Fluid Dynamics**

International Workshop on Theoretical and Numerical Fluid Dynamics

Coast Plaza Hotel at Stanley Park, Vancouver, Canada

July 29 - August 2, 1996 (with short courses July 27-28)

The principal goal of this workshop/meeting is to explore the

extension of the mathematical theory of the Navier-Stokes equations,

and of numerical methods for these equations, to problems in nonlinear

fluids, turbulence and viscous compressible flow. To achieve this, the

program is organized around daily topics, with invited speakers who

have been requested to give lectures of a more expository nature than

usual. A number of these lectures will be followed by organized

discussions. Some of the lectures will be given by engineeers,

serveral of whom plan to include physical experiments in their

presentations. Another aim of the meeting is to bring Canadian and

American research in fluid dynamics into better contact with European

and Japanese research. This is reflected in the choice of invited

speakers and participants. In order to make the subject as widely

accessible as possible, particularly to students, the meeting will be

preceded by two short courses on July 27 and July 28. One, on the

mathematical theory of the Navier-Stokes equations, will be given by

Giovanni P. Galdi and the other, on numerical methods for the

Navier-Stokes equations, with be given by Rolf Rannacher.

Invited Speakers include:

K. Coughlin, G.P. Galdi, I.S. Gartshore, J. Glimm, R. Glowinski,

M.Y. Hussaini, C. Johnson, P.N. Kaloni, A. Kazhikhov, J. Necas,

T. Nishida, A. Novotny, M. Padula, A. Quateroni, K. Pileckas,

K.R. Rajagopal, R. Rannacher, M. Saalcudean, A. Sequeira, Y Shibata,

V.A. Solonnikov, C. Speziale, S. Turek, W. von Wahl, A. Wineman

Further information about this workshop can be obtained by e-mail

from fluid@fields.utoronto.ca or from the web site

http://www.fields.utoronto.ca.

Sincerely,

John Heywood

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

From: Etienne de Klerk <E.deKlerk@twi.tudelft.nl>

Date: Thu, 30 May 1996 14:03:55 +0200

**Subject: Stieltjes Workshop on High Performance Optimization Techniques**

Call for papers

Stieltjes Workshop on

High Performance Optimization Techniques

Thursday, September 19 to Friday, September 20, 1996

to be held at

The Delft University of Technology, Delft, The Netherlands

Aim of the workshop:

Recent progress in computer technology on the one hand and algorithms for

optimization on the other hand has led to a dramatic increase of the

efficiency of solution methods for a wide class of optimization problems.

The aim of the workshop is to bring together some of the most active

researchers working on the design and implementation of optimization

algorithms.

We aim to cover the latest algorithmic developments, complexity

results and implementation aspects, including the required tools from

numerical algebra.

Much attention will be given to the recent developments in semidefinite

optimization and its relevance for a wide range of practical applications

in fields such as combinatorial optimization, engineering design,

matrix inequalities in systems and control theory, and matrix

completion problems.

Main Speakers:

M. X. Goemans} (M.I.T.)

F. Rendl (Technische Universitat Graz)

Ph. Toint (Universit\'e de Namur)

L. Vandenberghe (Stanford University)

Program Committee:

Jan Karel Lenstra, Kees Roos, Lex Schrijver, Tamas Terlaky,

Henk A. van der Vorst.

Local Organizing Committee:

Etienne de Klerk, Arie Quist,

Kees Roos, Tamas Terlaky, Netty Zuidervaart-Murray.

e-mail address: For submission of abstracts, preregistration and

further information please send e-mail to:

HPOPT@twi.tudelft.nl

More detailed information, including a registration form, hotel

information and a list of tentative speakers

will be made available by mid June.

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

From: Chaoqun Liu <cliu@math.LaTech.edu>

Date: Mon, 3 Jun 1996 18:16:13 -0500 (CDT)

**Subject: Advances in Computational Fluid Dynamics**

LAST CALL FOR PARTICIPATION

SHORT COURSE

ADVANCES IN COMPUTATIONAL FLUID DYNAMICS

Louisiana Tech University, Ruston, Louisiana

June 24 - 28, 1996

Louisiana Tech University will host a five-day CFD short course

in the summer of 1996. A number of leading researchers will give lectures

and have one-on-one discussion with participants on recent advances in CFD.

Several advanced teaching and research codes for incompressible flow,

direct numerical simulation for flow transition, and numerical combustion

with detailed chemistry will be described and distributed to all attendants

free of charge.

Anyone who has interest in CFD and basic multigrid and CFD knowledge

is welcome to attend, including faculty, graduate students, scientific

researchers, government agents, and industrial scientists and engineers.

The registration fee, discounted for early registration, is $350 (group rate

is $250 each and student rate is $150), and it covers all lecture notes,

floppy disks with computational codes, a reception, and a formal dinner.

The lectures include:

Multigrid and multilevel adaptive methods

First-order system least squares (FOSLS)

Preconditioning for low speed flow

Central differences, the R-K scheme, and residual smoothing

Boundary conditions for time-dependent flows

Upwind differencing - principles and recent developments

Advanced turbulence models

Fast Navier-Stokes solvers

High-order grid generation

Direct numerical simulation for complex geometry

Non-reflecting outflow boundary conditions

Multilevel grid dissipation

Numerical simulation for turbulent combustion with detailed chemistry

Numerical pollutant prediction

The speakers include:

Dr. L. Sakell (US Air Force Office of Scientific Research)

Dr. A. Brandt (Weizmann Institute, Israel)

Dr. E. Turkel (Tel Aviv University, Israel)

Dr. P. Roe (University of Michigan)

Dr. S. McCormick (University of Colorado at Boulder)

Drs. T-H Shih and W. Liou (ICOMP, NASA Lewis Research Center)

Dr. C-H Sung (Navy David Taylor Research Center)

Dr. C. Liu ( Louisiana Tech University)

Drs. Z. Liu, X. Zheng, and C. Liao ( Louisiana Tech University)

FURTHER INFORMATION

Dr. Chaoqun Liu, Associate Professor

ACFD Short Course Chair

Department of Mathematics and Statistics

Louisiana Tech University

P.O. Box 3189, Ruston, LA 71272-0001

Tel : (318) 257-2257

Fax : (318)257-3935

email : cliu@math.latech.edu

http://www.math.latech.edu/~cliu

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

From: Ali Sayed <sayed@ece.ucsb.edu>

Date: Thu, 6 Jun 96 10:57:58 PDT

**Subject: Structured Matrices in Filtering and Control**

INTERNATIONAL WORKSHOP ON

NUMERICAL METHODS FOR STRUCTURED MATRICES

IN FILTERING AND CONTROL

August 1 to August 3, 1996

Radisson Hotel, Santa Barbara, CA

The objective of this three-day workshop is to bring together

researchers from the fields of filtering, control, and numerical

analysis to discuss recent advances and future directions in the

design of fast and numerically reliable algorithms for structured

matrices, such as Toeplitz, Hankel, Vandermonde, and related

structures, with applications in the disciplines of filtering and

control.

The meeting will be held at the Radisson Hotel overlooking

the Pacific Ocean in the beautiful surroundings of the city of

Santa Barbara. The hotel is located close to the lively

downtown area with its numerous shops, restaurants, and theaters.

Santa Barbara has a local airport with connections to Denver,

San Francisco, and Los Angeles.

Organizers: T. Kailath and V. Olshevsky

(Stanford University)

S. Chandrasekaran, A. J. Laub, and A. H. Sayed

(University of California, Santa Barbara)

More information about the meeting, including alternate hotels,

travel, and program, can be obtained by contacting sayed@ece.ucsb.edu.

Current list of attendees:

D. Bini (Dip. Matematica, Pisa, Italy)

T. Boros (Stanford University, USA)

R. Brent (Australian National University, Australia)

J. Bunch (Univ. California, San Diego, USA)

R. Chan (The University of Hong Kong, Hong Kong)

S. Chandrasekaran (Univ. California, Santa Barbara, USA)

P. Dewilde (Delft University, The Netherlands)

O. Dias (Lehman College, NY, USA)

W. Eberly (Univ. of Calgary, Canada)

L. Elden (Linkoping University, Sweden)

F. Gaston (University of Birmingham, UK)

L. Gemignani (Dipartimento di Informatica, Pisa, Italy)

I. Gohberg (Tel-Aviv University, Israel)

G. Golub (Stanford University, USA)

W. Gragg (Naval Postgraduate School, CA, USA)

M. Gu (Univ. California, Berkeley, USA)

G. Heinig (Kuwait University, Kuwait)

M. Hochbruck (University of Tubingen, Germany)

X. Huang (Lehman College, NY, USA)

T. Kailath (Stanford University, USA)

I. Koltracht (USA)

A. Laub (Univ. California, Santa Barbara, USA)

S. Miller (Univ. California, Santa Barbara, USA)

B. Meini (Dip. Matematica, Pisa, Italy)

J. G. Nagy (Southern Methodist University, Texas, USA)

V. Nascimento (Univ. California, Santa Barbara, USA)

V. Olshevsky (Stanford University, USA)

V. Pan (Lehman College, NY, USA)

H. Park (Univ. Minnesota, USA)

R. J. Plemmons (Wake Forest University, USA)

A. H. Sayed (Univ. California, Santa Barbara, USA)

K. Schubert (Univ. California, Santa Barbara, USA)

S. Serra (Dipartimento di Informatica, Pisa, Italy)

G. Strang (MIT, USA)

P. Tilli (Scuola Normale Superiore, Pisa, Italy)

Y. Yu (Lehman College, NY, USA)

A. Zheng (Lehman College, NY, USA)

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

From: Colin Wright <WRIGHT@gauss.cam.wits.ac.za>

Date: Fri, 31 May 1996 14:49:15 GMT+0200

**Subject: Position at University of the Witwatersrand**

UNIVERSITY OF THE WITWATERSRAND, JOHANNESBURG, SOUTH AFRICA

DEPARTMENT OF COMPUTATIONAL & APPLIED MATHEMATICS

LECTURER -- COMPUTATIONAL AND APPLIED MATHEMATICS

Applications are invited from suitably qualified persons for appointment to a

tenure track position at Lecturer level in the area of Optimization. The

successful candidate will be expected to contribute towards the supervision of

Masters and Doctoral students in Computational and Applied Mathematics as well

as to the Department's undergraduate teaching programme.

Active research areas in the department are: optimization; theory and control

of dynamical systems; numerical analysis and computational mathematics; image

processing; chaos theory; classical mechanics; continuum mechanics;

differential equations; general relativity and cosmology; observational

astrophysics; mathematics of finance.

The successful applicant may supplement his or her salary through contract

research and limited consulting.

To apply submit a detailed CV with the names and addresses of three

professional referees plus certified copies of degrees/diplomas to: Personnel

Office (Academic), University of the Witwatersrand, Private Bag 3, Wits 2050 or

via e-mail to Professor C J Wright, wright@gauss.cam.wits.ac.za. The closing

date is 15 June 1996, late applications will however be considered until the

position is filled.

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

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

Date: Sat, 25 May 96 19:52:40 BST

**Subject: Postdoctoral Position at Rutherford Appleton Laboratory**

POSTDOCTORAL RESEARCH POSITION ... RUTHERFORD APPLETON LABORATORY

A postdoctoral research position is available at the Rutherford

Appleton Laboratory (URL http://www.cclrc.ac.uk/ral/index.html) to work

in the Numerical Analysis Group (URL

http://www.cis.rl.ac.uk/struct/ARCD/NUM.html). The post is supported

by a Long Term Research (LTR) Project funded by the European Union.

The Project is charged with developing new parallel algorithms for the

direct solution of sparse systems of equations and for their

preconditioning. These algorithms will be implemented as portable

prototypes and will be integrated into a public-domain Library. The

prototype codes will be extensively tested on a range of industrial

applications.

The work can commence immediately. The position is for one year with

the possibility of extensions to a second and even third year.

Applicants should be experienced in programming Fortran and preferably

be familiar with message passing concepts. MPI will be principally

used in the Project. A background in numerical analysis and knowledge

of numerical linear algebra are essential.

Further information about the duties of the post can be obtained from

Jennifer Scott on e-mail (sct@rl.ac.uk) or by phone (01235 445131).

The Fixed Term Appointment will be made at Higher Scientific

Officer level; Salary will be within the range 13,491-19,669 pounds.

Application forms can be obtained from the Rutherford Appleton

Laboratory Recruitment Section by phone (01235 45510) or by writing to

the Section at: CCLRC; Building R71/2.16, Rutherford Appleton

Laboratory; Chilton; Didcot; Oxon. OX11 0QX. England.

Please quote reference 1379/96.

Completed forms should be returned to the Recruitment Section by

no later than 13 June 1996.

[Please note that nadigest readers who replied to the earlier preliminary

announcement about this post should not reapply]

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

From: Omar Ghattas <Omar_Ghattas@NAVIER.CML.CS.CMU.EDU>

Date: Sun, 02 Jun 1996 11:18:08 -0400

**Subject: Postdoctoral Position at Carnegie Mellon University**

A graduate research assistanship or a post-doc position is available

in the area of Numerical Modeling of Multiphase Fluid Flow. Typical

example applications include study of movement of organic chemicals,

such as fuels and solvents, in the subsurface environment. There are

several open questions regarding the mobility of these contaminants,

central to the successful characterization and remediation of

hazardous waste sites, which this research project aims to address.

The position requires prior experience with numerical modeling.

However, although the project involves a significant component of

numerical modeling, the candidate should have, as much as possible,

equal interest and respect for the physics of contaminant transport

and for numerical analysis. If interested and qualified, please

contact Prof. Marina Pantazidou, Civil and Environmental Engineering

Dept., Carnegie Mellon University, Pittsburgh, PA, at the following

e-mail address: marina+@andrew.cmu.edu.

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

From: Scott Hutchinson <sahutch@cs.sandia.gov>

Date: Tue, 4 Jun 1996 09:10:46 -0600

**Subject: Position at Sandia National Laboratories**

Research Position at Sandia National Laboratories

The Computational Sciences, Computer Sciences and Mathematics Center

at Sandia National Laboratories invites outstanding applicants for a

research fellowship in its Parallel Computational Sciences Department.

This position offers an exceptional opportunity for innovative

research in scientific computing on advanced architectures. The

successful candidate will have significant experience in the area of

computational plasmas, including both PIC and fluid models, high

performance computing and numerical algorithms. The work will require

programming of massively parallel, high performance computers in a

small team environment.

The Center maintains strong research programs in a variety of areas,

including analytical and computational mathematics, discrete

mathematics and algorithms, computational physics and engineering, and

advanced systems software and tools. A unique parallel computing

environment is supported which includes a 1,872-processor Intel

Paragon and a 1024-processor nCUBE 2. A 9000-processor Intel computer

with 512 GBytes of memory will be online in 1996.

The position includes a competitive salary, moving expenses, and a

professional travel allowance.

Requirements: Ph.D. in physics or electrical engineering or closely

related field. U.S. citizenship is also a requirement for this

position.

Interested persons should submit a complete resume with names and

addresses of three references to:

Scott A. Hutchinson

Sandia National Laboratories

Department 9221 / MS 1111

P.O. Box 5800

Albuquerque, NM 87185-1111

Applications will be accepted through 31 July 1996 or until the

position is awarded.

Equal Opportunity Employer M/F/V/H.

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

From: William McClurg <wcm@utrc.utc.com>

Date: Tue, 04 Jun 1996 11:45:00 -0400 (EDT)

**Subject: Position at United Technologies Research Center**

Open Position at United Technologies Research Center

The Controls Technology Group at the United Technologies Research Center

invites qualified individuals to apply for an open position in the Controls

Technology Group.

United Technologies Research Center (UTRC) is an internationally recognized

R&D organization which conducts research across a broad range of technology

areas in support of operating units of United Technologies Corporation

(UTC). The Controls Technology Group is responsible for research activities

at UTC on control algorithms, implementations, and control oriented modeling

which advance the state-of-the-art in one or more UTC divisions:

Pratt/Whitney, Sikorsky, Otis, Carrier and UT Automotive. Particular areas

of interest and expertise include applications of nonlinear dynamic analysis

and the development of nonlinear control strategies. Each individual

participates in a variety of different projects, all contributing to the

solution of practical engineering problems.

The minimum requirement is a strong background in mathematics and expertise

developing scientific software. A master s degree in applied mathematics or

in a relevant engineering discipline plus three years of professional

experience analyzing nonlinear dynamic systems, developing relevant

numerical analysis software, and constructing control algorithms is the

current qualification expectation. A Ph.D. is desirable and preference will

be given to candidates with expertise in: 1) numerical methods for

simulation and analysis of dynamical systems, 2) extraction of reduced order

models from CFD or partial differential equation models, 3) analysis and

synthesis of nonlinear control strategies, 4) demonstrated ability to work

independently and as a member of a team.

Inquiries should be directed to:

William "Chris" McClurg

em: wcm@utrc.utc.com

ph: 860-727-7022

fx: 860-727-7494

United Technologies Research Center

Mail Stop: 129-29

411 Silver Lane

East Hartford, CT 06108

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

From: Shirley Browne <browne@cs.utk.edu>

Date: Wed, 5 Jun 1996 08:10:53 -0400

**Subject: Position at University of Tennessee**

University of Tennessee

Research Associate, High Performance Computing

Applications are invited for a full-time research position in the high

performance computing and parallel programming area. Candidates should

have a master's degree in computer science or a related discipline,

with experience in designing, implementing, and using parallel systems

software. Duties will include locating, categorizing, and evaluating

parallel systems software, as well as implementing and maintaining an

Internet-accessible repository of this software.

Start date is September 1, 1996, with anticipated funding for five years.

Send letter, resume, and names of three references electronically to

Jack Dongarra, dongarra@cs.utk.edu, and Shirley Browne, browne@cs.utk.edu.

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

From: SIAM <thomas@siam.org>

Date: Tue, 04 Jun 96 11:21:44 EST

**Subject: Contents, SIAM Applied Mathematics**

SIAM JOURNAL ON

Applied Mathematics

AUGUST 1996 Volume 56, Number 4

Large Time Asymptotics in Contaminant Transport in Porous Media

C. N. Dawson, C. J. van Duijn, and R. E. Grundy

On the Stability of Pressure and Velocity Computations for Heterogeneous

Reservoirs

Are Magnus Bruaset and Bjorn Fredrik Nielsen

Density Fields in Burgers and KdV-Burgers Turbulence

A. I. Saichev and W. A. Woyczynski

Integral Method Solution of Time-Dependent Strained Diffusion-Reaction Layers

with Multistep Kinetics

Werner J. A. Dahm, Gretar Tryggvason, and Mei Zhuang

High-Kappa Limits of the Time-Dependent Ginzburg-Landau Model

Qiang Du and Paul Gray

Pulse-Coupled Decentral Synchronization

Rudolf Mathar and Jurgen Mattfeldt

Reflected Waves in an Inhomogeneous Excitable Medium

G. Bard Ermentrout and John Rinzel

Electromagnetic Inverse Problems and Generalized Sommerfeld Potentials

Petri Ola and Erkki Somersalo

Reconstruction of Source and Medium Parameters via Wave-Splitting and Green

Function Equations

Zhiming Sun

Stochastic Turning Point Problem in a One-Dimensional Refractive Random

Multilayer

Jeong-Hoon Kim

Recovery of Blocky Images from Noisy and Blurred Data

David C. Dobson and Fadil Santosa

What Is the Best Causal Scale Space for Three-Dimensional Images?

V. Caselles and C. Sbert

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

From: SIAM <tschoban@siam.org>

Date: Thu, 06 Jun 96 09:56:28 EST

**Subject: Contents, SIAM Matrix Analysis and Applications**

SIAM Journal on Matrix Analysis and Applications

July 1996, Volume 17, Number 3

CONTENTS

In Memoriam: Robert C. Thompson: 1931-1995

Charles R. Johnson

ARTICLES

Any Nonincreasing Convergence Curve Is Possible for GMRES

Anne Greenbaum, Vlastimil Ptak, and Zdenek Strakos

A Block-GTH Algorithm for Finding the Stationary Vector of a Markov Chain

Dianne P. O'Leary and Yuan-Jye Jason Wu

On the Spectral Radius of (0, 1)-Matrices with 1's in Prescribed Positions

Richard A. Brualdi and Suk-Geun Hwang

On the Condition Behaviour in the Jacobi Method

Zlatko Drmac

An Operator Relation of the USSOR and the Jacobi Iteration Matrices of a

p-Cyclic Matrix

Dimitrios Noutsos

On the Facial Structure of the Set of Correlation Matrices

Monique Laurent and Svatopluk Poljak

Interlacing Properties of Tridiagonal Symmetric Matrices with Applications to

Parallel Computing

Ilan Bar-On

On Eigenvalues of Quadratic Matrix Polynomials and Their Perturbations

M. Radjabalipour and A. Salemi

Computational Techniques for Real Logarithms of Matrices

Luca Dieci, Benedetta Morini, and Alessandra Papini

An Analysis of Zero Set and Global Error Bound Properties of a Piecewise Affine

Function Via Its Recession Function

M. Seetharama Gowda

A Chain Rule for Matrix Functions and Applications

Roy Mathias

Further Study and Generalization of Kahan's Matrix Extension Theorem

Dao-Sheng Zheng

On the Jacobi Matrix Inverse Eigenvalue Problem with Mixed Given Data

Shu-fang Xu

On the Derivatives of Matrix Powers

Paola Sebastiani

Second-Order Systems with Singular Mass Matrix and an Extension of Guyan

Reduction

Sanjay P. Bhat and Dennis S. Bernstein

Multifrontal Computation with the Orthogonal Factors of Sparse Matrices

Szu-Min Lu and Jesse L. Barlow

On Doubly Symmetric Tridiagonal Forms for Complex Matrices and Tridiagonal

Inverse Eigenvalue Problems

A. George, Kh. Ikramov, W.-P. Tang, and V. N. Tchugunov

Uniqueness of Sum Decompostions of Symmetric Matrices

Daniel Hershkowitz

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

End of NA Digest

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