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

- Honorary Doctorate for Gene Golub at Umea University
- Scientific Computing Web Pages
- How to Find the Biggest Eigenvalues of Large Matrices
- Eigenvalues and -vectors of a Real 3x3 Matrix
- Seeking Copy of Ascher, Mattheij and Russell Book
- Software for Orthogonal Polynomials
- Problems with Email for Book on Iterative Methods
- New Book on Conjugate Gradients
- Software for 3-D Fluid Interfaces Available
- FTP, WWW, Gopher from University of Regensburg
- Nominations for George Polya Prize
- Conference on Computer Methods and Water Resources
- Workshop on Neural Networks and Neurocontrol
- Conference in Hungary on Computational Mechanics
- Workshop on Computational Electromagnetics
- Conference to Honor Thomas Kailath
- Fellowship at University of Bologna
- Postdoctoral Position at Rice University
- Research Assistantship at the University of Salford
- Postdoctoral Positions at University of Groningen
- Contents, Linear Algebra and its Applications
- Contents, International Journal of Computational Fluid Dynamics

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

From: Bo Kagstrom <Bo.Kagstrom@cs.umu.se>

Date: Mon, 15 May 95 14:32:39 +0200

**Subject: Honorary Doctorage for Gene Golub at Umea University**

Dear NA-net community,

The faculty of Mathematics and Natural Sciences has decided to appoint

Stanford University's Fletcher Jones Professor Gene H. Golub a honorary

doctorate (Doctor of Philosophy) at Umea University.

We all know Gene's magnificent scientific contributions to our area and

he very much deserves all the marks of distinction he has received over

the years.

Gene has had close relations with Umea for 25 years. He first visited

Umea 1970 and has since then been a very welcome guest both at a personal

and professional level during his regular visits.

The official appointment will take place September 15-16, 1995 during

the celebration of the 30th Anniversary of Umea University. Gene will

present a talk on September 15. Most of September 16 is devoted to

"festivities".

We welcome all Gene's friends to Umea for this very special event.

Bo Kagstrom and Per-Ake Wedin

Email: bokg@cs.umu.se

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

From: Gene Golub <golub@sccm.Stanford.EDU>

Date: Mon, 15 May 95 23:29:12 PDT

**Subject: Scientific Computing Web Pages**

After talking to many students, I have the impression that it is hard

for students to know where there are graduate programs in Scientific

Computing and Applied Mathematics. If you have such a program and if

you have a page on the WEB that is accessible, please send me a note

and I will make a page available which will allow students (and

others) to get a better perspective on our subject.

Thanks.

Gene

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

From: Basil Benjamin (B.Benjamin@unisa.edu.au)

Date: Tue, 16 May 1995 14:47:45 +1030

**Subject: How to Find the Biggest Eigenvalues of Large Matrices**

I am interested in knowing what are thought to be the "best" methods for

finding the n eigenvalues of maximum modulus of a matrix of order N.

Take n=20 and N=1e3, 1e4, 1e5 (if the answer varies with these sizes)

Presumably the answer will change if the matrix is:

1. real and symmetric 2. real and nonsymmetric 3. complex.

If anyone has comments on any of these cases, I would be very pleased to hear.

B.R.Benjamin, School of Maths, University of South Australia.

Fax +61 8 302 3381

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

From: Daniel A. Asimov <asimov@nas.nasa.gov>

Date: Wed, 17 May 1995 14:35:46 -0700

**Subject: Eigenvalues and -vectors of a Real 3x3 Matrix**

What do the experts think is the most efficient and numerically stable

algorithm for finding the eigenvalues and -vectors of a real (non-symmetric)

3 x 3 matrix ?

I am wondering if there is something to be gained in using an algorithm that's

tailored to 3 x 3 matrices, instead of using the same algorithms that are

deemed stellar for n x n matrices.

(In case it's relevant, I'll mention that the matrix entries tend to be

neither exceptionally small nor exceptionally large; they may be thought of as

selected independently from a standard normal distribution.)

Recommendations of appropriate canned routines are certainly welcome.

For the eigenvalue calculation, I am also interested in hearing the pros and

cons of using the formula (Cardano's) for the roots of a cubic polynomial,

which is mathematically satisfying and fairly fast, since it's a formula --

but which may or may not be numerically stable.

Thanks in advance for your suggestions.

Dan Asimov

Senior Computer Scientist

Mail Stop T27A-1

NASA Ames Research Center

Moffett Field, CA 94035-1000

asimov@nas.nasa.gov

(415) 604-4799 w

(415) 604-3957 fax

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

From: SIAM <bdilisi@siam.org>

Date: Thu, 18 May 95 14:36:09 EST

**Subject: Seeking Copy of Ascher, Mattheij and Russell Book**

SIAM will be reprinting Numerical Solution of Boundary Value Problems

for Ordinary Differential Equations, by Uri M. Ascher, Robert M.M.

Mattheij, and Robert D. Russell in our Classics in Applied Mathematics

Series. We are looking for someone who has a copy of the book and who

would like to donate it to SIAM--we will have to cut and paste pages.

In exchange, SIAM will give two complimentary copies of the new edition.

Please contact Vickie Kearn, Publisher, SIAM, 3600 University City Science

Center, Philadelphia, PA 19104-2688; e-mail: kearn@siam.org.

Thank you very much.

Vickie Kearn

Publisher, SIAM

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

From: Daniele Funaro <FUN18%IPVIAN.bitnet@ICINECA.CINECA.IT>

Date: Thu, 18 May 95 11:11:11 ITA

**Subject: Software for Orthogonal Polynomials**

Time ago I wrote a list of about 80 FORTRAN subroutines

with the aim of creating a short library for spectral methods

based on algebraic orthogonal polynomials (Jacobi, Chebyshev,

Legendre, Laguerre and Hermite).

These routines allow basic operations such as:

determination of zeroes and weights of Gauss quadratures,

change of basis (from Fourier coefficients to point-values

and viceversa), evaluation of derivatives and norms, etc.

They may be used to initialize FORTRAN codes using spectral

methods in view of more sophisticated applications, but they are

also suited for beginners.

I recently decided to make this software available to everybody.

The access on-line to the documentation can be made by

anonymous ftp on:

ftp.ian.pv.cnr.it in the directory /pub/splib

There you find a compressed version of the FORTRAN source:

splib_source.f.Z

the manual in postscript (about 180 pages):

sp_man.ps.Z

and a short version of the manual just containing the index:

index_of_sp_man.ps.Z

The subroutines have been checked many times, however they may

be always subjected to human mistakes and rounding errors.

I will gladly accept suggestions and improvements.

Daniele Funaro

University of Pavia, Italy

Via Abbiategrasso 209, 27100 Pavia

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

From: Are Magnus Bruaset <Are.Magnus.Bruaset@si.sintef.no>

Date: Tue, 16 May 1995 08:50:16 +0200

**Subject: Problems with Email for Book on Iterative Methods**

In the previous issue of NA-DIGEST (95:20) I announced the availability

of my book "A Survey of Preconditioned Iterative Methods", published by

Longman. In this announcement I also gave an email address for the Longman

publishing company. Unfortunately, as several of you have already

experienced, this email address is very unstable at the moment due to

technical problems. To overcome the incovenience this may have caused,

I just want to tell that the Web page

http://www.oslo.sintef.no/avd/33/3340/presurv

will give an alternative email address that can be used until the official

address is in working condition again.

Best regards

Are Magnus Bruaset

SINTEF Applied Mathematics

Oslo, Norway

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

From: Martin Hanke <hanke@ipmsun1.mathematik.uni-karlsruhe.de>

Date: Mon, 15 May 1995 10:00:16 +0200 (MET DST)

**Subject: New Book on Conjugate Gradients**

Announcement of a new book:

CONJUGATE GRADIENT TYPE METHODS FOR ILL-POSED PROBLEMS

Martin Hanke (Universitat Karlsruhe, Germany)

Publisher: Pitman Research Notes in Mathematics

Longman Scientific & Technical

Longman House

Harlow, Essex CM20 2JE

UK

Prize: UK pounds 23

About the book:

The conjugate gradient method is a powerful tool for the iterative solution

of selfadjoint operator equations in Hilbert space. This volume summarizes

and extends the developments of the past decade concerning the applicability

of the conjugate gradient method (and some of its variants) to ill-posed

problems and their regularization.

This Research Note presents a unifying analysis of an entire family of

conjugate gradient type methods. Most of the results are as yet unpublished,

or obscured in the Russian literature. Beginning with original results by

Nemirovskii and others for minimal residual type methods, equally sharp

convergence results are then derived for the classical Hestenes-Stiefel

algorithm. In the final chapter some of these results are extended to

selfadjoint indefinite operator equations.

The main tool for the analysis is the connection of conjugate gradient

type methods to real orthogonal polynomials, and elementary properties of

these polynomials. These prerequisites are provided in a first chapter.

Applications to image reconstruction and inverse heat transfer problems

are pointed out, and exemplarily numerical results are shown for these

applications.

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

From: Xiaolin Li <xli@cs.iupui.edu>

Date: Mon, 15 May 1995 10:29:12 +0500

**Subject: Software for 3-D Fluid Interfaces Available**

Software for simulating the 3-D fluid interface instabilities in

compressible fluids (Rayleigh-Taylor and Richymyer-Meshkov instabilities)

is available to those who are interested in applying it to scieitific

problems.

This code uses a resolution enhanced numerical scheme for contact

surface, that is, the second order TVD with artificial compression

(TVD/AC). The fluid contact interface is traced through the level set

method. The code has both the seriel and parallel modes and can be

run in parallel and distributed system such as the iPSC-860 and the PVM.

The output features the triangulated surface which can be viewed

by using the geomview software package.

For detail and to obtain this code, please send email to:

xlli@silver.ucs.indiana.edu

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

From: Herbert Homeier <Herbert.Homeier@chemie.uni-regensburg.de>

Date: Mon, 15 May 95 20:16:43 +0200

**Subject: FTP, WWW, Gopher from University of Regensburg**

The combined WWW/gopher/ftp server at

rchs1.uni-regensburg.de (IP 132.199.48.1)

now provides

Preprints, Technical Reports, and Theses

in the fields Computational Chemistry, Scientific Computing, and

Numerical Analysis.

WWW: http://rchs1.uni-regensburg.de:80/preprint.html

ftp://rchs1.chemie.uni-regensburg.de/pub/preprint

gopher://rchs1.chemie.uni-regensburg.de:70/11./pub/preprint

gopher: gopher rchs1.uni-regensburg.de

--> 8. Data files (= /pub )

--> 45. preprint

ftp: ftp rchs1.uni-regensburg.de

Name(...) : anonymous

Password: <your e-mail address>

cd /pub/preprint

Dr. Herbert H. H. Homeier

Institut fuer Physikalische und Theoretische Chemie

Universitaet Regensburg

D-93040 Regensburg, Germany

Phone: +49-941-943 4720 FAX : +49-941-943 2305

email: na.hhomeier@na-net.ornl.gov

<A HREF="http://rchs1.uni-regensburg.de/%7Ec5008/">HOMEPAGE</A>

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

From: Donna Blackmore <blackmore@siam.org>

Date: Tue, 16 May 95 16:06:48 EST

**Subject: Nominations for George Polya Prize**

CALL FOR NOMINATIONS

for

GEORGE POLYA PRIZE

The Polya Prize

SIAM will present the award at the 1996 SIAM Annual Meeting in Kansas

City, Missouri, July 22-26. The award honors the memory of George

Polya and will be given for a notable application of combinatorial

theory.

Eligibility

There are no restrictions except that the prize is broadly intended to

recognize specific work.

Description of the Award

The award will consist of an engraved medal and a $20,000 cash prize.

Nominations

A letter of nomination, including a description of the achievement(s),

should be sent by July 1, 1995, to:

Dr. Paul Seymour

Chair, Polya Prize Selection Committee

Bell Communications Research

435 South Street

Morristown, NJ 07960

Supporting letters, or names of knowledgeable persons from whom such

letters might be solicited, are also welcome.

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

From: Roger Ghanem <ghanem@eng.buffalo.edu>

Date: Wed, 17 May 1995 11:20:34 -0400

**Subject: Conference on Computer Methods and Water Resources**

Please be advised the dates for the Third International Conference for

Computer Methods and Water Resources, initially set for August 1995,

have been moved to September 25-28 1995.

Thank you

Roger Ghanem

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

From: Francisco Caviedes <caviedes@servidor.dgsca.unam.mx>

Date: Wed, 17 May 1995 21:23:12 +0600

**Subject: Workshop on Neural Networks and Neurocontrol**

THE INTERNATIONAL WORKSHOP ON NEURAL NETWORKS AND NEUROCONTROL

SEPTEMBER 5-10 QUINTANA ROO, MEXICO 1995

CALL FOR PAPERS

The Organizing Committee invites all persons interested in fuzzy sets,

evolutionary programming, and neural networks applied to the engineering

fields related to control systems, to submit papers for presentation at the

conference.

All papers accepted for presentation will be published in the conference

proceedings. To ensure a high-quality conference and proceedings, all paper

submissions will be reviewed for technical merit and content by three senior

researchers in the field.

Authors are requested to submit a letter of intent, the information sheet

(that includes full name (s) of the author(s), title, address, phone/fax

numbers, e-mail address), and an abstract (up to 250 words) no later than

May 25, 1995.

TOPICS OF INTEREST

Architecture

ANN Paradigms, Associative Memories, Hybrid Systems

Learning

Gradient-Based Learning, Stochastic Learning, Adaptive Methods,

Supervised Learning, Reinforcement Learning

Systems Analysis

Time Series, Signal Processing, Systems Modeling, Systems Identification,

Process Monitoring, Fuzzy Models

Control & Design

Optimization, Neurocontrol, Adaptive Control, Learning Control, Fuzzy

Control, Intelligent Control

Authors should forward the letter of intent, information sheet, and abstract

to:

Prof. Benito Fernandez-Rodriguez

Mechanical Engineering Department, ETC 5.160, MC C2200

The University of Texas at Austin, Austin, TX 78712-1063

Phone/Fax: (512) 471-7852-7682

E-mail: benito@NERDLab.me.utexas.edu

or

Dr. Nydia Lara-Zavala

Centro de Instrumentos, Laboratorio de Neurocomputaci=F3n=20

UNAM, Apdo. Postal 70-186

M=E9xico, 04510, D.F.

Phone: (525) 652 5920

Fax: (525) 550 0357

E-mail: nydia@aleph.cinstrum.unam.mx or

caviedes@servidor.unam.mx

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

From: Gyorgy Szeidl <mechszgy@gold.uni-miskolc.hu>

Date: Thu, 18 May 1995 08:44:00 +0100

**Subject: Conference in Hungary on Computational Mechanics**

FIRST ANNOUNCEMENT AND CALL FOR PAPERS

NUMERICAL METHODS AND COMPUTATIONAL MECHANICS

IN SCIENCE AND ENGINEERING

15-19th July 1996

Miskolc, Hungary

Organized by

Central European Association for Computational Mechanics

Janos Bolyai Mathematical Sociaty Hungarian Acadamy of Sciences

University of Miskolc

This conference is a satellite conference prior to the 2nd European

Congress of Mathematics to be held in Budapest, July 21-27, 1996. The aim

of the conference is to bring together numerical analysts, specialists of

computational mechanics and software developers. The conference will focus

on numerical methods used in mechanical and other engineering applications.

Special attention will be given to the finite element method and related

techniques.

FIELDS OF PRIMARY INTEREST

-- Numerical algebra (sparse and dense linear systems, eigenvalue problems,

nonlinear systems, parallel algorithms, etc.)

-- Numerical solution of differential equations (FEM, BEM, multigrid,

difference methods, spectral methods, parallel algorithms, etc.)

-- Computational mechanics (FEM, BEM, parallel algorithms etc)

INTERNATONAL SCIENCE COMMITTEE

I. BABUSKA, chairman; University of Maryland

B. SZABO, co-chairman; Washington University in St. Louis

B. GUO, The University of Manitoba, Winnipeg, Canada

R. HABER, University of Illinois at Urbana-Champaign, USA

V.P. IL'IN, Computing Center, Russian Academy of Sciences, Novosibirsk, Russia

C. JOHNSON, Chalmers University of Technology, Sweden

M. KRIZEK, Czech Academy of Sciences, Prague

J.T. ODEN, The University of Texas, USA

J. PITKARANTA, Helsinki University of Technology, Finland

L.S. XANTHIS, University of Westminster, London, UK

J.R. WHITEMAN, Brunel University, U.K.

M.F. WHEELER, Rice University Houston, USA

T. CZIBERE, University of Miskolc, Hungary

Z. GASPAR, Technical University of Budapest, Hungary

I. PACZELT, University of Miskolc, Hungary

P. ROZSA, Technical University of Budapest, Hungary

G. STOYAN, Eotvos Lorand University of Budapest, Hungary

PLENARY SPEAKERS INCLUDE

I. Babuska, B. Szabo, R. Haber, V.P. Il'in, M. Krizek, L.S. Xanthis,

W.L. Wendland, Zs. Gaspar, P. Rozsa, G. Stoyan

SUGGESTIONS RECEIVED FOR MINISYMPOSIA

Finite element methods for parabolic and hyperbolic problems,

Computational methods for optimization of engineering systems,

Linear algebra, Boundary element method

CALL FOR PAPERS

Authors who wish to present a 20-minute contributed lecture should submit a

one-page abstract in English and LATEX format with article 12pt style.

Page size is A4. Authors are kindly asked to submit their abstracts

via e-mail. Deadline: 30th of January, 1996.

If you are interested in attending the conference and wish to be on the

mailing list, please SEND NOW, a message to

A.GALANTAI or Gy.SZEIDL

Institute of Mathematics or Department of Mechanics

University of Miskolc

3515 Miskolc-Egyetemvaros

Hungary

The whole text of the First Announcement will have been sent to

persons on our mailing list as of the middle of July.

Phone: 36-46-365111 Fax: 36-46-365174

e-mail: matnum@gold.uni-miskolc.hu (preferred)

matgal@gold.uni-miskolc.hu

mechszgy@gold.uni-miskolc.hu

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

From: Roy Nicolaides <rn0m+@andrew.cmu.edu>

Date: Thu, 18 May 1995 15:09:16 -0400 (EDT)

**Subject: Workshop on Computational Electromagnetics**

WORKSHOP ANNOUNCEMENT

ICASE/LaRC is hosting a COMPUTATIONAL ELECTROMAGNETICS workshop

which will take place from June 12 through June 16 1995. The

purpose of the workshop is to bring together leading

researchers from academia, industry and government to exchange ideas

and information on topics of current interest in computational

electromagnetics. The workshop consists of invited presentations

and discussions and is open to all interested researchers and

practitioners.

The invited talks include:

P. Petropoulos (SMU)

A higher order finite difference scheme for the time

dependent Maxwell's equations in materials with memory

B. McCartin (GMI)

Guided wave computation via the control region approximation

V. Oliker (Emory)

On Monge-Ampere equations arising in synthesis of reflector antennas

J-F. Lee (WPI)

Vector finite elements; perfectly matched absorbing boundary conditions

M. Deshpande (NASA)

Integral equation methods to solve electromagnetic

scattering and radiation problems

R. Shore (USAF/Phillips)

Incremental length diffraction coefficients for the

shadow boundaries of circular and parabolic cylinders

Z. Cendes (Ansoft Corp/CMU)

Spurious modes; absorbing boundary conditions; CAD interfaces

A. Taflove (Northwestern)

Advances in finite difference time domain simulation of

electromagnetic wave phenomena

R. Nicolaides (CMU)

Unstructured mesh approximations for Maxwell's equations

with applications to radar cross sections

U. Kangro (CMU)

Spurious electric and magnetic offset fields in electromagnetic

scattering: cause and cures.

R. Reddy (NASA)

Hybrid finite element and moments methods for electromagnetic

scattering and radiation from complex structures

P. Monk (Delaware)

Higher order finite elements on cuboid meshes

T. Abboud (EP,France)

Integral equation techniques for relatively high frequency

electromagnetic scattering

For additional information please contact ICASE at (804) 864-2174

or Roy Nicolaides at nic+@cmu.edu.

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

From: Christine K. Lincke <chris@rascals.Stanford.EDU>

Date: Fri, 19 May 95 16:40:09 -0700

**Subject: Conference to Honor Thomas Kailath**

International Conference on

COMMUNICATIONS, COMPUTING, CONTROL and

SIGNAL PROCESSING

to honor the contributions of Professor Thomas Kailath

June 22-26, 1995

Stanford University, Stanford, CA, USA

The traditional systems disciplines of communications, computation, control

and signal processing are becoming increasingly important in addressing major

technological challenges of the coming century, in fields such as materials

processing, highway automation, and ubiquitous personal communications,

among many others. Moreover the boundaries between these separate disciplines

are rapidly being blurred by the many demands of these applications.

This conference will highlight several of these recent trends and results,

presented by leading scientists and engineers from around the world.

Invited speakers include: N. Abramson, B. Anderson, K. Astrom, B. Atal,

A. Bruckstein, S. Boyd, J. Cioffi, T. Cover, B. De Moor, P. Dewilde,

T. Durrani, C. Foias, D. Forney, R. Gallager, M. Gevers, I. Gohberg,

G. Golub, H. Kimura, P. Kokotovic, S.Y. Kung, R-W. Liu, L. Ljung,

D. Mayne, S. Meerkov, D. Messershmitt, S.K. Mitter, A. Netravali,

B. Ottersten, A. Paulraj, E. Robinson, V. Roychowdhury, R. Schafer,

G. Verghese, N. Viswanadham, A. Viterbi, J. Willems, G. Xu, L. Zadeh,

For further information, fax: 415-723-8473 or e-mail: chris@isl.stanford.edu

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

From: Giorgio Turchetti <TURCHETTI@bologna.infn.it>

Date: Fri, 19 May 1995 14:06:15 +0200 (WET-DST)

**Subject: Fellowship at University of Bologna**

EC HUMAN CAPITAL AND MOBILITY

NONLINEAR PROBLEMS IN BEAM DYNAMICS AND TRANSPORT

Reasearch Assistantships

The European Commission has provided funding to support research in

nonlinear effects in beam dynamics. The network consists of the following

institutions:

Dipartimento di Fisica, Universit\`a di Bologna - ITALY

Department of Mathematics, University of Patras - GREECE

LNL Laboratori Nazionali INFN, Legnaro - ITALY

ENEA Laboratori di Frascati - ITALY

GSI Darmstadt - GERMANY

DESY Hamburg - GERMANY

CERN Geneva - SWITZERLAND

Faculdad de Ciencias Fisicas, Universidad Complutense, Madrid - SPAIN

Three fellowships are available at CERN-Bologna, DESY and GSI respectively

for the period of one year. Applications are invited from citizens of all

EC member states.

Fellowship reserved to EC citizens excluding italians.

Working sites : University of Bologna and CERN (Geneva).

Reasearch topics: beam diffusion induced by ripples in the power supply.

Fellowship reserved to EC citizens excluding germans.

Working site: GSI (Darmstadt). Research topics: effect of noise in

the beam stability.

Fellowship reserved to EC citizens excluding germans.

Working site DESY (Hamburg). Research topics: nonlinearities of a

magnetic lattice and collective phenomena.

The appointment is for one year starting 1st october 1995.

Mobility within the network for short periods will be allowed.

Gross salary will be 2000 ECU per month.

Applicants should have a PhD in Physics,

preferably concerning nonlinear dynamics and its applications to particle

accelerators.

Candidates not having yet obtained the PhD, will be considered with lower

priority; exceptionally the fellowship could

be attributed, but with a lower salary to be negotiated.

Closing date for applications is 30th of August, 1995

The applications with a full C.V. and letters by two referees

with complete addresses should be addressed to

Prof. G.Turchetti, Dipartimento di Fisica, Universit\`a di Bologna.

Via Irnerio 46, 40126 Bologna, ITALY

FAX 39.51.247244; E-MAIL Turchetti@bologna.infn.it

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

From: Dan Sorensen <sorensen@masc22.rice.edu>

Date: Fri, 19 May 95 12:52:23 CDT

**Subject: Postdoctoral Position at Rice University**

Postdoctoral Position at Rice University:

The Numerical Linear Algebra Project within the Center for Research on

Parallel Computation has a postdoctoral position in software and algorithm

development for large scale algebraic eigenvalue problems. The applicant

should have a Ph.D. and be knowledgeable in the areas of parallel programming,

numerical software development, numerical linear algebra, Krylov subspace

projection methods. In addition to a research interest in this area, it is

crucial that the applicant be a good writer and speaker and have an interest

in modern software design and implementation. The position will be under

the direction of Dan Sorensen and will be a research appointment in the

Department of Computational and Applied Mathematics at Rice University in

Houston, Texas.

Contact Dan Sorensen, sorensen@rice.edu, immediately if you are interested

in at least one year in this position.

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

From: S. Amini <S.Amini@mcs.salford.ac.uk>

Date: 15 May 95 9:41

**Subject: Research Assistantship at the University of Salford**

EPSRC Funded Research Assistantship

at the University of Salford

The Mathematics committee of the Engineering and Physical Sciences Research

Council has awarded us a postdoctoral research assistantship to commence on

or soon after 1st October 1995 for a period of up to 3 years.

The project title is

''Analysis of Boundary Integral Equations for a Class of

Inhomogeneous and Nonlinear PDEs''

The project will be supervised jointly by Dr S Amini of the University of

Salford and Dr Chen Ke of the University of Liverpool. The successful

candidate will be based at Salford but regular bi-monthly meetings are planned

at Liverpool.

CANDIDATE:

should possess or be about to obtain a PhD in a related field.

The starting salary is in the region of 15000 pounds p.a. on the RA1A scale.

OUTLINE OF THE PROJECT:

The Boundary integral methods provide an effective technique for the solution

of a large class of linear partial differential equations.

For an important class of inhomogeneous and nonlinear problems, applications

of classical boundary integral methods are no longer effective, due to the

presence of domain integrals. Promising methods such as the dual reciprocity

technique for obtaining boundary only integral equations have been attempted

by the engineering community.

The project is concerned with the analysis of these generalised boundary

integral equation methods based on approximation of the source terms by

radial basis functions. The resulting integral equations are to be discretised

using wavelet functions. We start by investigating two model problems,

the Helmholtz and the diffusion equations, before extending the analysis

to the more general equations.

For further details please contact:

Dr S Amini

Department of Mathematics & Computer Science

University of Salford

Salford M5 4WT.

UK.

Tel: (0044) 0161- 745 5353 (Direct)

Fax: (0044) 0161- 745 5559

email: S.Amini@mcs.salford.ac.uk

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

From: F. W. Wubs <F.W.Wubs@math.rug.nl>

Date: Thu, 18 May 1995 13:42:45 +0200

**Subject: Postdoctoral Positions at University of Groningen**

The Center for Large-Scale Scientific Computing (LSSC) of the University of

Groningen (RUG) offers:

2 POST-DOCTORAL FELLOWSHIPS

for a period of 9-12 months each. These fellowships are provided through the

Human Capital and Mobility Host Institute Program of the European Commission.

The Center for LSSC is part of the Faculty of Mathematics and Natural Sciences.

The Center is specialized in the design and application of simulation methods

requiring huge amounts of computer power (high-performance computing). A broad

research area is covered, ranging from molecular chemistry, through fluid

mechanics and astrophysics, upto computer vision and computational

neuroscience. The University of Groningen possesses a most modern

infrastructure for high-performance computing, consisting of workstations,

minisupers (Convex C240), i860 multiprocessor systems, massively parallel

supercomputers (Thinking Machines CM-5; Cray J932) and visualization tools.

We are looking for candidates who can play a role in the central theme of

high-performance computing, i.e. the development and implementation of

numerical algorithms on parallel computers. Therefore, candidates should

hold a PhD degree in one of the areas of high-performance computing, or

should acquire this degree in the very near future.

Candidates must have a firm background in numerical analysis and parallel

computing. Experience in developing iterative methods for solving the large

sparse matrices which arise in various applications (such as CFD) will be

highly appreciated.

The candidates are expected to deliver support to the high-performance

computing community at RUG, and to make a contribution to the educational

curriculum on parallel computing.

According to the EU rules, to be eligible candidates must be a national of a

Member State of the European Union or an associated state or be resident in

the Community. Applicants may not possess Dutch nationality or have carried

out their normal activity in The Netherlands for more than two years prior

to the date of submission of their application.

Applications should contain an extended curriculum vitae showing the

candidate's experience in high-performance computing. It should include a list

of publications and an abstract of the candidate's PhD thesis (1-2 pages).

Applications should be sent before June 15, 1995 to:

prof.dr. A.E.P. Veldman

Department of Mathematics

University of Groningen

P.O. Box 800

NL-9700 AV Groningen

The Netherlands

e-mail: veldman@math.rug.nl

fax: +31 50 633976

> From the received applications, the Center for LSSC as the host institute

will make a pre-selection. The final selection of the candidates will be made

by the European Commission. For further inquiries you can contact

prof. Veldman at the address above.

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

From: Richard Brualdi <brualdi@math.wisc.edu>

Date: Wed, 17 May 1995 17:54:01 -0500 (CDT)

**Subject: Contents, Linear Algebra and its Applications**

LINEAR ALGEBRA AND ITS APPLICATIONS

Contents Volume 220

Special Issue: Proceedings of the Workshop

``Nonnegative Matrices, Applications and Generalizations''

and the Eighth Haifa Matrix Theory Conference

Richard A. Brualdi (Madison, Wisconsin)

> From the Editor-in-Chief 1

Preface 7

Lars-Erik Andersson (Linkoping, Sweden),

Gengzhe Chang (Hefei, Anhui, China),

and Tommy Elfving (Linkoping, Sweden)

Criteria for Copositive Matrices Using Simplices

and Barycentric Coordinates 9

I. Baragana (San Sebastian, Spain) and I. Zaballa (Vitoria-Gasteiz, Spain)

Block Similarity Invariants of Restrictions to

(A, B)-Invariant Subspaces 31

Ilan Bar-On (Haifa, Israel) and Bruno Codenotti (Pisa, Italy)

A Fast and Stable Parallel QR Algorithm for Symmetric

Tridiagonal Matrices 63

Alberto Borobia (Madrid, Spain)

Matrices Which Are Extreme Points of the

Generalized Transitive Tournament Polytope 97

Dragomir Z. D@B-okovic (Waterloo, Ontario, Canada)

Cosets of Centralizers in the General Linear Group

Contain Regular Elements 111

B. Curtis Eaves (Stanford, California), Uriel G. Rothblum (Haifa, Israel),

and Hans Schneider (Madison, Wisconsin)

Perron-Frobenius Theory Over Real Closed Fields and

Fractional Power Series Expansions 123

L. Elsner (Bielefeld, Germany)

The Generalized Spectral-Radius Theorem:

An Analytic-Geometric Proof 151

L. Elsner (Bielefeld, Germany) and S. Friedland (Chicago, Illinois)

Singular Values, Doubly Stochastic Matrices,

and Applications 161

Miroslav Fiedler (Prague, Czech Republic)

Numerical Range of Matrices and Levinger's Theorem 171

Stephen J. Kirkland (Regina, Saskatchewan, Canada)

and Michael Neumann (Storrs, Connecticut)

Group Inverses of M-Matrices Associated With Nonnegative

Matrices Having Few Eigenvalues 181

Mark Krupnik (Haifa, Israel)

Geometric Multiplicities of Completions of

Partial Triangular Matrices 215

George M. Lady (Philadelphia, Pennsylvania),

Thomas J. Lundy (Victoria, British Columbia, Canada),

and John Maybee (Boulder, Colorado)

Nearly Sign-Nonsingular Matrices 229

P. Lancaster (Calgary, Alberta, Canada) and

L. Rodman (Williamsburg, Virginia)

Minimal Symmetric Factorizations of Symmetric Real

and Complex Rational Matrix Functions 249

Yu. Lyubich (Haifa, Israel)

Perron-Frobenius Theory for Finite-Dimensional

Spaces With a Hyperbolic Cone 283

Rosa Amelia Martins (Aveiro, Portugal) and

Joao Filipe Queiro (Coimbra, Portugal)

Spectral Inequalities for Generalized Rayleigh Quotients 311

J. J. McDonald (Regina, Saskatchewan, Canada),

M. Neumann (Storrs, Connecticut),

H. Schneider (Madison, Wisconsin), and

M. J. Tsatsomeros (Regina, Saskatchewan, Canada)

Inverse M-Matrix Inequalities and Generalized Ultrametric Matrices 321

J. P. Milaszeqicz (Buenos Aires, Argentina)

Comparison Theorems for Monotone Newton-Fourier Iterations

and Applications in Functional Elimination 343

B. Mond (Bundoora, Victoria, Australia) and

J. E. Pecaric (Zagreb, Croatia)

Reverse Forms of a Convex Matrix Inequality 359

Reinhard Nabben (Bielefeld, Germany) and

Richard S. Varga (Kent, Ohio)

Generalized Ultrametric Matrices-a Class of Inverse M-Matrices 365

Ronald J. Stern and J. J. Ye (Montreal, Quebec, Canada)

Variational Analysis of an Extended Eigenvalue Problem 391

Robert C. Thompson (Santa Barbara, California)

Root Spreads for Polynomials and Hermitian Matrix Pencils 419

Referees, Volumes 201-220 435

Author Index, Volumes 201-220 441

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

LINEAR ALGEBRA AND ITS APPLICATIONS

Contents Volume 221

Charles Kenney (Santa Barbara, California) and

Gary Hewer (China Lake, California)

Trace Norm Bounds for Stable Lyapunov Operators 1

Jie-Tai Yu (Notre Dame, Indiana)

On Relations Between Jacobians and Minimal Polynomials 19

Werner Kratz (Ulm, Germany)

Characterization of Strong Observability and Construction

of an Observer 31

H. Narayanan (Bombay, India)

A Rounding Technique for the Polymatroid Membership Problem 41

M. Niezgoda and Z. Otachel (Lublin, Poland)

Differentiable Transformations Preserving a Cone Preordering 59

Philip A. Knight (Glasgow, United Kingdom)

Fast Rectangular Matrix Multiplication and QR Decomposition 69

Carl H. FitzGerald (La Jolla, California), Charles A. Micchelli

(Yorktown Heights, New York), and Allan Pinkus (Haifa, Israel)

Functions That Preserve Families of Positive Semidefinite Matrices 83

Li Jiong-Sheng (Hefei, Anhui, People's Republic of China)

Eigenvalues of Oriented-Graph Matrices 103

Andrew J. Lazarus (Berkeley, California)

Eigenvectors of Circulant Matrices of Prime Dimension 111

Li Luoluo (Guangzhou, People's Republic of China)

Sufficient Conditions for the Solvability of an Algebraic

Inverse Eigenvalue Program 117

Shao Jia-yu (Shanghai, People's Republic of China)

On the Largest kth Eigenvalues of Trees 131

Zhi-Hao Cao (Shanghai, People's Republic of China)

On Convergence of Nested Stationary Iterative Methods 159

LeRoy B. Beasley (Logan, Utah), Stephen J. Kirkland

(Regina, Saskatchewan, Canada), and Bryan L. Shader

(Laramie, Wyoming)

Rank Comparisons 171

J. M. Pena (Zaragoza, Spain)

M-Matrices Whose Inverses Are Totally Positive 189

Steve Kirkland (Regina, Saskatchewan, Canada) and

Robert E. Hartwig (Raleigh, North Carolina)

A Convexity Result for Complex Numbers With Applications to

Nonnegative Normal Matrices 195

S. Jondrup (Copenhagen, Denmark)

Automorphisms and Derivations of Upper Triangular Matrix Rings 205

Juan M. Gracia and Francisco E. Velasco (Vitoria-Gasteiz, Spain)

Stability of Invariant Subspaces of Regular Matrix Pencils 219

R. D. Grigorieff and R. Plato (Berlin, Germany)

On a Minimax Equality for Seminorms 227

Kazuo Toraichi (Tsukuba, Ibaraki, Japan) and Masaru Kamada

(Hitachi, Ibaraki, Japan)

Knot Positions for the Smoothest Periodic Quadratic Spline

Interpolation of Equispaced Data 245

George Labahn (Waterloo, Ontario, Canada), Bernhard Beckermann

(Villeneuve d Ascq, France), and Stan Cabay (Edmonton, Alberta, Canada)

Inversion of Mosaic Hankel Matrices via Matrix Polynomial Systems 253

Author Index 281

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

From: Grant Guevremont <grantg@wells.CERCA.UMontreal.CA>

Date: Fri, 19 May 1995 15:03:20 -0400

**Subject: Contents, International Journal of Computational Fluid Dynamics**

Contents

INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS

Vol. 4, No. 1-2, 1995

Least Squares Finite Element Solutions for

Three-Dimensional Backward-Facing Step Flow

B.-N. Jiang, L.-J. Hou, T.-L. Lin and L. A. Povinelli

An Efficient Least-Squares Finite Element Method for

Incompressible Flows and Transport Processes

L. Q. Tang and T. T. H. Tsang

Finite Element Modelling of the Incompressible Navier-Stokes Equations

T. Utnes and G. Ren

Analysis of Combustion Processes in a Gun Interior Ballistics

T. W. H. Sheu and S.-M. Lee

An Explicit FEM for 3-D Viscous Incompressible Flows

with an EBE/PCG Iterative Algorithm

U. Gulcat

On the Influence of the Choice of Transport and

Chemical Models for Non-Equilibrium Hypersonic

Flow Simulations

M. L. Sawley and S. Wuthrich

Parallel Computation of the 2-D Navier-Stokes Flowfield of a Pitching Airfoil

A. Cui and D. D. Knight

The Behavior of Some Solution Acceleration Techniques in CFD

J. O. Hager and K. D. Lee

Steady Stratified Circulation Induced by Constant Coastal Wind

C.-W. Kong, R. R. J. Hwang and R. Y. Yang

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

End of NA Digest

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