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

- Seeking PostDoc or Assistant Professorship Position
- Seeking High-dimensional Parabolic PDEs
- Thesis on N-body Solver for Vortex Methods in CFD
- MGGHAT Version 1.1 Now Available
- New Book on Concurrent Scientific Computing
- Question on Robin of the ``Robin problem''
- Semi-linear Wave Equation
- SPARSKIT and Sparse Examples
- Conference in Romania
- Frontiers of Massively Parallel Computation
- ICASE/LaRC workshop on Adaptive Grid Methods
- Second Announcement Linkoping Conference
- Singularities in Partial Differnetial Equations
- Acta Numerica 1994
- Positions Available at Wolfram Research
- Fellowship Available at Oxford
- CFD Position in Manchester University
- Contents, SIAM Matrix Analysis and Applications
- Contents, Linear Algebra and its Applications
- Contents, SIAM Applied Mathematics

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

From: Frits Dumortier <fd@sun4.autoctrl.rug.ac.be>

Date: Mon, 20 Jun 1994 11:18:59 +0100

**Subject: Seeking PostDoc or Assistant Professorship Position**

Looking for PostDoc or Assistant Professorship Position

All good things come to an end! My term at the Dept. of Control Eng.

and Automation at the University of Gent finishes by the end of 1994

and I am therefore looking for a possible PostDoc or Assistant

Professorship Position in Belgium, Europe or eventually the States.

Fields of interest for research and/or teaching assignments are:

Advanced control theory:

linear control

adaptive control

predictive control

identification

simulation

Modern computer architectures:

vector processing

parallel processing

supercomputing

Numerical Algebra:

Parallel matrix algorithms as applied

in modern control algorithms

I also have an extended practical expertise in the management of VMS and

UNIX platforms, PCs and MACs, and computer networks.

Interested institutions/organizations can contact me by E-mail (preferably)

and I will send them an extended CV and publication list (PostScript- or

LaTeX-format).

advTHANKSance,

dr.ir. Frits Dumortier

University of Gent

Dept. Control Eng. & Automation

Technologiepark 9

B-9052 Zwijnaarde

Belgium

tel.: +32-9-264 55 80

fax : +32-9-264 58 39

E-mail: Frits.Dumortier@rug.ac.be

fd@autoctrl.rug.ac.be

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

From: Flavio Sartoretto <sartoret@lewy.dmsa.unipd.it>

Date: Mon, 20 Jun 1994 11:53:02 +0200

**Subject: Seeking High-dimensional Parabolic PDEs**

Dear na-digest reader,

I should like to test a Monte Carlo algorithm for solving

parabolic initial mixed boundary value problems like

u_t = Lu - c u, for x in D

u(x,0)=f(x), for x in D

alpha du/dn - gamma u = h(x,t) for x on B

where D is the n-dimensional domain of the problem, B its boundary,

L is a linear elliptic differential operator, f, h known functions, d/dn is

the normal derivative.

The key point is that the dimension n must be "large" (n > 3):

If you are interested in solving such problems

or you have some reference to point out, please send me an e-mail.

Thank you in advance. Flavio Sartoretto

Prof. Flavio Sartoretto

Dept. Matematica Applicata e Informatica

Venice University

Via Torino 157

30100 Mestre (Italy)

Fax: +39-49-831995

e-mail: sartoret@lewy.dmsa.unipd.it

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

From: Gavin Pringle <gavin@maths.napier.ac.uk>

Date: Fri, 24 Jun 94 12:09:57 BST

**Subject: Thesis on N-body Solver for Vortex Methods in CFD**

Hi,

I have recently completed my thesis, which I think may be of interest.

Briefly stated, I have investigated the Greengard_Rokhlin O(N) Fast N-body

solver, in both 2 and 3 dimenaions, and I have ported them

onto a MIMD computer. The 3D code was then employed to speed up

a vortex simulation of a turbulent fluid flow problem (non-viscous,

incompressible). Attention has been paid to the error which arises from

the Greengard-Rokhlin solver, and the exectution time has been reduced,

by various 'tricks', without compromising the prescribed tolerance.

If you are interested, please e-mail me and I will post a postscript version

to you. If you have any comments/questions about the text, I would be

happy to communicate on this subject.

Cheers,

Gavin

Gavin Pringle email: gavin@maths.napier.ac.uk, or

gavin@uk.ac.edinburgh.festival

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

From: William F. Mitchell <mitchell@cam.nist.gov>

Date: Fri, 24 Jun 94 14:16:08 EDT

**Subject: MGGHAT Version 1.1 Now Available**

I am pleased to announce the availability of Version 1.1 of MGGHAT.

MGGHAT (MultiGrid Galerkin Hierarchical Adaptive Triangles) is a

FORTRAN program for the solution of general second order linear

self-adjoint elliptic partial differential equations with

Dirichlet, natural or mixed boundary conditions on 2D polygonal

domains (possibly with holes).

MGGHAT uses a finite element method with linear, quadratic or

cubic elements (user selectable) over triangles. The adaptive

refinement via newest vertex bisection and the multigrid iteration

are both based on a hierarchical basis formulation. Run time and

a posteriori graphical displays are made with gnuplot.

Several changes have been made since version 1.0. It now has

the capability to save the program state and evaluate the solution

from the saved state. This is useful for systems of equations,

time dependent problems, nonlinear equations, etc. Examples for

a system of equations and a time dependent problem are included.

All graphics are now done with gnuplot. A Tcl/Tk based menu has

been added for manipulation of the graphics.

MGGHAT is available from netlib. It can be obtained, for example,

by sending the message "send index from pdes/mgghat" (without the

quotes) to netlib@research.att.com.

MGGHAT can also be obtained from MGNET (multigrid network) by

annonymous ftp to casper.cs.yale.edu in directory mgnet/mgghat.

A hypertext version of the User's Guide can be accessed by your

favorite WWW brower at the URL

http://gams.nist.gov/reports/mgghat/userguide/userguide.html

William F. Mitchell | mitchell@cam.nist.gov

Applied and Computational Mathematics Division | na.wmitchell@na-net.ornl.gov

National Institute of Standards and Technology |

Gaithersburg, MD 20899 |

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

From: Eric Van de Velde <evdv@ama.caltech.edu>

Date: Sun, 26 Jun 1994 15:21:44 -0700

**Subject: New Book on Concurrent Scientific Computing**

NEW BOOK:

Concurrent Scientific Computing,

Eric F. Van de Velde,

Number 16 in Texts in Applied Mathematics,

Springer-Verlag, New York, 1994.

ISBN 0-387-94195-9 and ISBN 3-540-94195-9

This book is based on the course of the same name, which I have been

teaching at Caltech since 1988. There are 12 chapters covering

numerical linear algebra, the fast Fourier transform, classical

methods for the Poisson equation, multigrid methods, domain decomposition,

and particle methods.

With the exception of the last chapter on computer dependency,

the book has a definite slant towards multicomputers, i.e., local-memory

architectures.

The text contains enough mathematical background material to make it

self-sufficient to anyone who has taken an introductory numerical-analysis

course. However, the main emphasis is on deriving algorithms of

concurrent scientific computing.

If you have any comments on the book, please let me know at

evdv@ama.caltech.edu

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

From: John A. Crow <crow@power.amasd.anatcp.rockwell.com>

Date: Mon, 20 Jun 94 08:21:58 PDT

**Subject: Question on Robin of the ``Robin problem''**

The ``Robin problem'' is another name for the `boundary value problem of

the third kind' in PDEs --- problems that specify boundary conditions

of the form G(u, grad u, nu) = 0 for the unknown function u where nu is the

boundary normal. The most common form is a*u + b*(nu . grad u) = f.

Question: Who was Robin?

My own guess is that he or she is/was French. The name seems not to appear

attached to the problem prior to the 50s, but this might be based on my

own lack of information. I did a scan of the literature but came up with

nothing conclusive.

Any info on this would be appreciated.

- John A. Crow

crow@power.amasd.anatcp.rockwell.com

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

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

Date: Mon, 20 Jun 1994 22:33:42 +0200 (MET DST)

**Subject: Semi-linear Wave Equation**

I am looking for some routines to solve initial value problem,

initial boundary value on semi-infinite line and initial boundary

value problems for semi-linear wave equation.

E. Kazakevicius

E.Kazakevicius@mat.dth.dk

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

From: Yousef Saad <saad@cs.umn.edu>

Date: Mon, 20 Jun 1994 19:58:18 -0500 (CDT)

**Subject: SPARSKIT and Sparse Examples**

Two annoucements:

1) SPARSKIT version 2 is now available - You can access it from an anonynous

FTP at cs.umn.edu. Instructions are appended to this message.

SPARSKIT is a library of routines that can be useful when working

with sparse matrices. The new version has a number of enhancements which

are too long to list. Noteworthy: more iterative solvers, more matrix

generation routines, some reordering routines,...

2) We are in the process of collecting sparse matrices from applications and

making them available also through anonymous FTP. Currently we have

matrices associated with CFD applications extracted from the examples

in the FIDAP package. We also have some matrices from an application

in a Tokamak simulation. Many (most) of these matrices are difficult

to solve with iterative methods, and a few are very difficult.

We have included for each matrix a description of the physical

problem where it originates from and the output of the INFO routine

from SPARSKIT. See the README files in the directory for details.

The matrices are located in the subdirectory /matrices in the FTP area.

They are all in the Harwell-Boeing format for compatibility with this

well-known collection.

It would be nice to make available some matrices on which `important'

numerical tests have been published. Currently, researcher on iterative

methods, are particularly interested in matrices that arise from typical

applications (e.g. CFD, electromagnetic scattering, structural

engineering, ...) If you have such matrices to contribute let me know.

We are also working on providing a contributed code for generating

matrices from CFD applications -- specifically a typical finite element

code for solving the Navier Stokes equations for a driven cavity problem.

SPARSKIT version 2 is located in an anonymous ftp area in ftp.cs.umn.edu

(128.101.230.9) -- To access it you will need to do the following:

* FTP to ftp.cs.umn.edu [128.101.230.9]

with the login name `anonymous' and your name as passwd.

* Then cd to /pub/sparse . You will find a file SPARSKIT2.tar.Z and a

directory called SPARSKIT2. You can either retrieve the

compressed tar file SPARSKIT2.tar.Z (use `binary' before

`get' when FTP'ing) or you can retrieve specific files /

modules, or all of the directory SPARSKIT2 (you may decide

to get the documentation first. - see below).

* the directory SPARSKIT2 consists of the eight subdirectories:

BLASSM, INFO, MATGEN, UNSUPP, DOC, INOUT, ORDERINGS, ITSOL,

and the files makefile and README,

Each of the subdirectories has a README file and one or

several makefiles (test programs). All the documentation is

in th DOC directory.

* If you retrieve the compressed file SPARSKIT2.tar.Z you

need to type the following in order to create the

subdirectory SPARSKIT2 in your directory:

uncompress -c SPARSKIT2.tar.Z | tar xvf -

Read carefully the README file in the main directory

SPARSKIT2. Send any comments, requests or complaints to

saad@cs.umn.edu.

Yousef Saad.

The collection of matrices is located in the subdirectory /matrices.

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

From: Ruediger Weiss <ne03@rz.uni-karlsruhe.de>

Date: Mon, 20 Jun 94 15:18:12 MESZ

**Subject: Conference in Romania**

First Announcement and Call for Papers

The Fourth Conference on Nonlinear Analysis,Numerical

Analysis and Applied Mathematics,April 26-30 ,1995

"OVIDIUS" University - Constanza,Romania

AIMS OF THE CONFERENCE : The Conference is organised by the

Department of Mathematics of the "OVIDIUS" University in

Constanza.It is aimed to establish exchanges and future friendships

among people working in the various fields mentioned in the title

and to point out the state-of-art of the researches in these fields.

SCIENTIFIC PROGRAM : The program will consists of about 6 invited

lectures in plenary sessions and selected presentations in three

parallel sessions : 1.Nonlinear analysis; 2.Numerical analysis;

3.Applied mathematics.

CONTRIBUTED PAPERS : You are invited to submit a paper(no more than

10 pages A4),which you may present as a lecture in approx. 15 minutes.

If you like to present a paper please submit an abstract (no more than

one page A4) to be included in a booklet of abstracts (available at

registration).

DEADLINES :

For abstracts - 15 December 1994

For full papers - 26 April 1995 (at registration).

The abstracts and papers will be sent on the address

of the Conference Secretariat.

REGISTRATION FEE : 30.- USD (you pay it arriving here,at registration).

The fee will cover the costs for the booklet of abstracts and the

printing of papers.For other informations and for sending the regis-

tration form please use the following address :

CONFERENCE SECRETARIAT

Constantin Popa

"OVIDIUS" University Constanza

Department of Mathematics,124 Mamaia Blvd.

8700 - Constanza,ROMANIA.

Phone : +40-41-614576 or +40-41-616194

Fax/Phone : +40-41-618372

Telex : 14468 UNIVO.

ORGANIZING COMMITTEE

Prof.dr.Silviu Sburlan

Prof.dr.Mirela Stefanescu

Conf.dr.Constantin Grasu.

SOCIAL PROGRAM : Constanza is one of the oldest (more than 2000

years old) and biggest towns in Romania.Because of its position on

the Black Sea shore,the town is also a resort place and it is

indeed beautiful.Some archeological places,the sea,some beautiful lakes

and interesting museums may offer wonderful trips for participants.

The Organizing Committee intends to offer possibilities of cheap

excursions to the ruins of old Histria and Callatis,on the shore

of the Black Sea and to the wine cellar of Murfatlar.

Dr. Ruediger Weiss

Rechenzentrum

Universitaet Karlsruhe

Postfach 6980

76128 Karlsruhe

Germany

Tel: +49 721 608 4034

Fax: +49 721 32550

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

From: Paul Havlak <havlak@cs.umd.edu>

Date: Tue, 21 Jun 1994 08:59:06 -0400 (EDT)

**Subject: Frontiers of Massively Parallel Computation**

FRONTIERS '95 -- Reminder of Deadline for Submissions: July 18, 1994

The Fifth Symposium on the Frontiers of Massively Parallel Computation

February 6-9, 1995, McLean Hilton, McLean, VA

This symposium is the fifth in a series of biennial meetings on the

design, development, and use of massively parallel computing systems.

The focus of this symposium is on research related or applicable to

systems scalable to 1,000 or more processors.

INVITED SPEAKERS:

Tom Blank, Maspar

Phil Colella, UC Berkeley

Ken Kennedy, Rice University

Burton Smith, Tera Computer

PANELS AND ORGANIZERS

Scalable I/O: Paul Messina, Caltech/JPL

Parallel C++: Carl Kesselman, Caltech

NII Application -- Radiation Treatment Planning: Robert Martino, NIH

Embedded Systems: David Schaefer, George Mason University

HPF -- Vendor Perspective: Joel Saltz, University of Maryland

Topical workshops and tutorials will be held on February 6, 1995.

The deadline for submission of papers and of workshop or tutorial

proposals is July 18, 1994. The deadline for abstracts of poster

sessions is November 1, 1994. More information is available from

http://www.cs.umd.edu:/projects/hpsl/announcements/front95.html, by

anonymous FTP at ftp.cs.umd.edu in directory pub/hpsl/frontiers95, or

by e-mail to frontiers95@umiacs.umd.edu.

Submissions and proposals should be sent to:

{Program, Tutorial, Workshop, Poster} Chair

Frontiers '95

UMIACS

University of Maryland

College Park, MD 20742-3251

For research papers, to be presented by formal presentation or

interactive demonstration, SIX (6) copies, in English, should be sent

to the program chair at the above address, so that they arrive by July

18, 1994. The text should be restricted to TEN double-spaced 8.5 by

ll inch pages. References, figures, tables, etc. may be included in a

addition to the ten pages of text. Submissions will be acknowledged

promptly by electronic mail and decisions sent by September 12 1994.

Camera-ready copy for the proceedings will be due October 31, 1994.

Each corresponding author is requested to include in a cover letter

the following information (1) complete postal address; (2) electronic

mail address; (3) phone number; (4) fax number; (5) an indication of

whether a formal presentation or researsh exhibit is desired; (6) a

statement that the manuscript is unpublished and is not under review

for another conference.

Sponsored by the IEEE Computer Society

IEEE Technical Committee on Computer Architectures

NASA Goddard Space Flight Center

UMIACS

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

From: John R. Van Rosendale <jvr@icase.edu>

Date: Tue, 21 Jun 1994 13:18:19 -0400

**Subject: ICASE/LaRC workshop on Adaptive Grid Methods**

ICASE/LaRC WORKSHOP ON ADAPTIVE-GRID METHODS

Radisson Hotel, Hampton, Virginia

*** NOVEMBER 7-9, 1994***

NOTE DATE CHANGE

Adaptive-grid techniques are essential to practical high resolution

fluid computations. In a three-day workshop, we plan to bring together

experts in adaptive refinement to evaluate the state-of-the-art in

adaptive-grid methods, and to discuss current research. Submissions

are invited in two areas: i) solution of proposed test cases and

ii) current research in adaptive-grid methodology. Priority will be

given to submissions which include computed solutions to one or more

of the proposed test cases.

The dates of this workshop, originally scheduled for August 26-28,

have been changed at the request of a number of the participants, who

felt the need for more time to devote to the test cases. These are a

sequence of two-dimensional compressible flow problems, chosen both

to encourage broad participation in the workshop, and to provide fair

comparisons between competing adaptive grid methodologies. All but

one of the test cases are inviscid, while four of the six are steady

state. Any adaptive-grid methods may be considered, including grid

enrichment, grid-point movement, order refinement, and hybrid methods.

As a convenience, structured and unstructured initial grids for these

test cases are available for anonymous FTP via Mosaic.

In addition to the test cases, the workshop will discuss the state-of-

the-art in adaptive-grid methods for fluid computations more generally.

The three-day format chosen should allow time for individual presenta-

tion of contributed solutions, comparison of solutions, presentations

of current research topics, and discussion on future directions in

adaptive-grid technology.

The invited speakers are:

Marsha Berger Courant Institute of Mathematical Sciences

Kim Bey NASA Langley Research Center

Phillip Colella University of California, Berkeley

Thomas Fisher University of Barcelona, Spain

Joseph Flaherty Rensselaer Polytechnic Institute

Dimitri Mavriplis ICASE, NASA Langley Research Center

Kenneth Powell University of Michigan, Ann Arbor

James Quirk ICASE, NASA Langley Research Center

Jeffrey Saltzman Los Alamos National Laboratory

Greg Spraggle Fluent, Inc.

Jean-Yves Trepanier University of Montreal, Canada

John Van Rosendale ICASE, NASA Langley Research Center

Gary Warren NASA Langley Research Center

Nigel Weatherill University College, Swansea, U.K.

Those interested in contributing should submit a four-to-six page

extended abstract for review. With the new workshop date, we are

extending the deadline for submission to August 15, 1994. Submissions

may be by hard copy, e-mail (uuencoded postscript), or fax. You will

be notified of acceptance by September 15, 1994. Final papers for

the proceedings will be due six weeks after the workshop. For more

information check the Mosaic pages:

http://k12mac.larc.nasa.gov/Wkshp.html

or

http://www.icase.edu/workshops/adapt

which contain complete descriptions of the test problems and the

proper paper format.

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

From: Lars Elde'n <laeld@math.liu.se>

Date: Wed, 22 Jun 94 09:41:25 +0200

**Subject: Second Announcement Linkoping Conference**

SECOND ANNOUNCEMENT AND CALL FOR PAPERS

In celebration of Ake Bjorck's 60'th birthday a conference will be

held at Linkoping University, January 9-10, 1995. The theme of the

conference will be

LEAST SQUARES METHODS: THEORY, ALGORITHMS and APPLICATIONS

The aim of the conference is to celebrate the many contributions of

Ake Bjorck to numerical analysis. This is best done by bringing

together scientists working in the field of numerical linear algebra

to discuss the latest development concerning least squares methods.

It is an interesting coincidence that in 1995 it will be 200 years

since the the least squares method was first used (according to Gauss

in his dispute with Legendre).

The following speakers have agreed to give a talk:

Iain Duff Rutherford Laboratory and CERFACS

Gene Golub Stanford University

Chris Paige McGill University

Haesun Park University of Minnesota

Mike Saunders Stanford University

Pete Stewart University of Maryland

Charles Van Loan Cornell University

Jim Varah University of British Columbia

CALL FOR PAPERS: There will be a number of contributed 20 min. talks.

No conference proceedings will be published. There are two ways to

submit an abstract:

a) send it by mail to Lars Elde'n at the address below.

b) send an abstract (ASCII file or LATEX) by email to laeld@math.liu.se

Participants and contributors should notice the following dates.

September 1, 1994 Third announcement

September 15, 1994 Deadline for abstract submission

October 15, 1994 Notification of acceptance

January 9-10, 1995 Conference

A conference dinner and birthday party will be held on the evening of

Monday, January 9.

ORGANIZING COMMITTEE: Lars Elde'n and Tommy Elfving, Linkoping, Gene

Golub, Stanford, Bo Kagstrom, Umea, and Axel Ruhe, Gothenburg.

INFORMATION: If you want to receive further information about the

conference by e-mail, please send a message to either of the addresses

below. Conference information will also be distributed by ordinary

mail.

CORRESPONDENCE should be addressed to either:

Lars Elde'n Theresia Petersson

Department of Mathematics Conference secretary

Linkoping University Same address as Lars Elde'n

S-581 83 Linkoping, Sweden

e-mail: laeld@math.liu.se thpet@math.liu.se

Phone: +46 13 28 21 83 +46 13 28 14 02

Fax: +46 13 10 07 46 +46 13 10 07 46

NOTE: January 11-13, 1995, a symposium will be held in Stockholm to

celebrate Germund Dahlquist's 70'th birthday. This will be announced

separately. For information, contact Gustaf Soderlind, e-mail

Gustaf.Soderlind@dna.lth.se.

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

From: C. J. Budd <Chris.Budd@bristol.ac.uk>

Date: Wed, 22 Jun 94 14:34:31 +0100

**Subject: Singularities in Partial Differnetial Equations**

First announcement

Workshop meeting on

Singularities and interfaces in Partial Differnetial Equations

Rodney Lodge, University of Bristol, UK

26th. - 28th. October, 1994

This workshop meeeting marks the start of a European HCM network on

Singularities and Interfaces in Partial Differential Equations. It aims

to bring together mathematicians in Europe interested in analytical aspects

of singularities and interfaces, their numerical computation and in their

application to physical problems. The meeting will focus on the following

topics: the theory of singularities and asymptotics in PDEs, singularities

in free boundary problems, singularities in superconductors, combustion,

phase transitions, singularities in water waves and viscous flow with

interfaces. There will be plenty of time for both formal talks and

informal interactions.

For further details contact: Chris Budd, School of Mathematics,

University Walk, Bristol, BS8 1TW, UK, Tel: 44-272-303317,

FAX: 44-272-303316, E-MAIL Chris.Budd@bristol.ac.uk.

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

From: Arieh Iserles <A.Iserles@amtp.cam.ac.uk>

Date: Thu, 23 Jun 94 11:09:14 BST

**Subject: Acta Numerica 1994**

The 1994 issue of Acta Numerica is now out and its contents are

Luis ALVAREZ and Jean Michel MOREL: "Formalization and computational

aspects of image analysis"..............................................1

Tony F. CHAN and Tarek P. MATHEW: "Domain decomposition algorithms"....61

S.W. ELLACOTT: "Aspects of the numerical analysis of neural networks".145

Bengt FORNBERG and David M. SLOAN: "A review of pseudospectral methods

for solving partial differential equations"...........................203

R. GLOWINSKI and J.L. LIONS: "Exact and approximate controllability

for distributed parameter systems I"..................................269

Leslie GREENGARD and Monique MOURA: "On the numerical evaluation of

electrostatic fields in composite materials"..........................379

Malcolm SABIN: "Numerical geometry of surfaces".......................411

Andrew STUART: "Numerical analysis of dynamical systems"..............467

As the na-netters might recall, the purpose of Acta Numerica is to

publish surveys of recent important developments in numerical analysis

and scientific computing. The themes and the authors are selected by a

distinguished Editorial Board (C. de Boor, F. Brezzi, J.C. Butcher,

P.G. Ciarlet, G.H. Golub, H.B. Keller, H.-O. Kreiss, K.W. Morton,

M.J.D. Powell and R. Temam). Acta Numerica is published once a year.

Acta Numerica 1994 continues the tradition that has been set in the

previous two volumes, presenting new developments on algorithms,

theory and application areas, except that the present issue is longer

than usual (572 pages).

Acta Numerica 1994 is available as a single volume for $44.95 (SIAM

members receive a 30% discount) or you can subscribe to automatically

receive your volume each year on publication. Copies of previous

volumes are also available for purchase. Further information can be

obtained and orders placed from Cambridge University Press by

contacting Amy Thomas at thomas@roslin.stanford.edu

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

From: Michael Trott <mtrott@wri.com>

Date: Mon, 20 Jun 1994 06:55:55 -0500

**Subject: Positions Available at Wolfram Research**

Mathematica Development

We are looking for top-quality individuals to work on innovative projects

in the areas of numerical computation, differential equations and

computational geometry. Extensive programming experience is required,

preferably in C. At least some familiarity with Mathematica is required.

Extensive experience in numerical analysis required.

Wolfram Research is headquartered in Champaign, Illinois and is an

affirmative action / equal opportunity employer. Interested applicants

should send a resume to:

Attn: Personnel,

Wolfram Research, Inc.,

100 Trade Center Drive,

Champaign,

IL 61820,

resumes@wri.com

fax: 217-398-0747

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

From: Bette Byrne <Bette.Byrne@comlab.ox.ac.uk>

Date: Fri, 24 Jun 1994 11:53:48

**Subject: Fellowship Available at Oxford**

CLOSING DATE: 30TH JUNE 1994

UNIVERSITY OF OXFORD

Computing Laboratory in association with the Smith Institute

SMITH RESEARCH FELLOW IN COMPUTATION

Applications are invited for a three year Research Fellowship, with the

possibility of two further years, at the Computing Laboratory, Oxford

University. The successful candidate will also be a senior member of

the Smith Institute, an innovative forum for the exchange of ideas,

problems and solutions between University researchers and industrial

scientists of Smith System Engineering Limited based in Guildford.

Applications will be welcome from Computing Scientists, Mathematicians

and Engineers specialising in any of the following areas: high

performance computing; distributed computing; parallel architectures,

systems and algorithms; system requirements, specification and

compliance; networks and communications; multimedia and synthetic

environments; computational science and engineering.

The post will involve strong interaction with Smith System Engineering,

which is engaged in a number of national and European computational

initiatives. The Fellow will have the opportunity to spend time at the

company premises in Guildford, discussing industrially relevant problems

in a stimulating business environment. Associated travel and

accommodation costs will be met by the company.

Salary will be according to age and experience, on either the RS1A or RS2

scale. (RS1A scale is currently 13,601 to 20,422 p.a. and the RS2 scale is

currently 18,855 to 25,107 p.a., both under review).

Further particulars may be obtained from: The Administrator, Oxford

University Computing Laboratory, Wolfson Building, Parks Road,

Oxford OX1 3QD. (Fax: 44-(0)865-273839, Email: sue@comlab.ox.ac.uk)

Applications in the form of a full curriculum vitae, together with the

names and addresses of three referees, should be sent to the Administrator

to arrive by 30th June 1994.

The University is an Equal Opportunity Employer.

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

From: Christopher T H Baker <cthbaker@ma.man.ac.uk>

Date: Wed, 22 Jun 94 12:41:45 BST

**Subject: CFD Position in Manchester University**

The University of Manchester (UK) is advertising a new chair in

Computational Fluid Dynamics established to provide a strong

interactive link between the School of Engineering and the Mathematics

Department.

The closing date for applications is 31st August.

Contact the Academic Staffing Office:

phone -- (International +44) (0)61 275 2028

fax -- (International +44) (0)61 273 5306

quoting reference 222/94.

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

From: SIAM <nelson@siam.org>

Date: Mon, 20 Jun 94 13:38:54 EST

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

Contents

SIAM J. ON MATRIX ANALYSIS AND APPLICATIONS

Vol. 15, No. 4, October 1994

A Perturbation Analysis of the Generalized Sylvester

Equation (AR-LB, DR-LE) = ( C,F)

Bo Kagstrom

Uniform Stability of Markov Chains

Ilse Ipsen and Carl Meyer

An Efficient Algorithm to Compute Row and Column Counts for

Sparse Cholesky Factorization

John B. Gilbert, Esmond G. Ng, and Barry W. Peyton

Convexity and Concavity of the Perron Root and Vector of

Leslie Matrices with Applications to a Population Model

Stephen J. Kirkland and Michael Neumann

Stable Numerical Algorithms for Equilibrium Systems

Stephen A. Vavasis

Some Convergence Properties of Matrix Sets

David P. Stanford and Jose Miguel Urbano

A Hybrid Algorithm for Optimizing Eigenvalues of Symmetric Definite Pencils

Jean)Pierre A. Haeberly and Michael L. Overton

Row Sums and Inverse Row Sums for Nonnegative Matrices

Shmuel Friedland, Rohan Hemasinha, Hans Schneider, Jeffrey

Stuart, and James Weaver

Collinearity and Total Least Squares

Ricardo D. Fierro and James R. Bunch

Rank Robustness of Complex Matrices with Respect to Real Perturbations

M. A. Wicks and R. A. DeCarlo

Row Ordering for a Sparse QR Decomposition

Thomas H. Robey and Deborah L. Sulsky

Block-Triangularizations of Partitioned Matrices under

Similarity/Equivalence Transformations

Hisashi Ito, Satoru Iwata, and Kazuo Murota

Numerical Range of Matrix Polynomials

Chi-Kwong Li and Leiba Rodman

A Stable and Efficient Algorithm for the Rank-One

Modification of the Syummetric Eigenproblem

Ming Gu and Stanley C. Eisenstat

Fast Solution of Confluent Vandermonde Linear Systems

Hao Lu

Condition and Accuracy of Algorithms for Computing Schur

Coefficients of Toeplitz Matrices

I. Gohberg, I. Koltracht, and D. Xiao

Eigenvalues of Block Matrices Arising from Problems in Fluid Mechanics

K. A. Cliffe, T. J. Garratt, and A. Spence

On the Perturbation of the Cholesky Factorization

Zlatko Drmac, Matjaz Omladic, and Kresimir Veselic

Towards a Divide and Conquer Algorithm for the Real

Nonsymmetric Eigenvalue Problem

Loyce Adams and Peter Arbenz

Gaussian Elimination with Partial Pivoting can Fail in Practice

Leslie V. Foster

A Hybrid Tridiagonalization Algorithm for Symmetric Sparse Matrices

Ian A. Cavers

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

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

Date: Mon, 20 Jun 1994 13:26:53 -0500 (CDT)

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

LINEAR ALGEBRA AND ITS APPLICATIONS

Contents Volume 207

Walter F. Mascarenhas (Campinas, Brazil)

The Structure of the Eigenvectors of Sparse Matrices 1

Andrew Lenard (Bloomington, Indiana)

Structure Theory of Reciprocal Pairs of Linear Transformations 21

T. Ja. Azizov (Voronezh, Russia), P. A. Binding (Calgary,

Alberta, Canada), J. Bognar (Budapest, Hungary), and

B. Najman (Zagreb, Croatia)

Nondegenerate Jordan Subspaces of Self-Adjoint Operators in

Indefinite Spaces 37

George Labahn (Waterloo, Ontario, Canada) and

Tamir Shalom (Herzlia, Israel)

Inversion of Toeplitz Structured Matrices Using Only

Standard Equations 49

Ann Sinap and Walter Van Assche (Heverlee, Belgium)

Polynomial Interpolation and Gaussian Quadrature for

Matrix-Valued Functions 71

Bingsheng He (Nanjing, People's Republic of China)

New Contraction Methods for Linear Inequalities 115

Xingping Sun (Springfield, Missouri)

Scattered Hermite Interpolation Using Radial Basis Functions 135

N. M. Missirlis and N. G. Gaitanos (Athens, Greece)

Extensions of the Ostrowski-Reich Theorem 147

Nam-Kiu Tsing (Hong Kong), Michael K. H. Fan, and

Erik I. Verriest (Atlanta, Georgia)

On Analyticity of Functions Involving Eigenvalues 159

Steve Batterson (Atlanta, Georgia)

Convergence of the Francis Shifted QR Algorithm on Normal Matrices 181

Andre C. M. Ran (Amsterdam, the Netherlands) and

Leiba Rodman (Williamsburg, Virginia)

The Rate of Convergence of Real Invariant Subspaces 197

Evgenij E. Tyrtyshnikov (Moscow, Russia)

Influence of Matrix Operations on the Distribution of Eigenvalues

and Singular Values of Toeplitz Matrices 225

Anders Barrlund (Umea, Sweden)

Perturbation Bounds for the Generalized QR Factorization 251

Haruo Yanai and Shin-ichi Mayekawa (Tokyo, Japan)

BOOK REVIEW: Linear Algebra and Linear Models, by R. B. Bapat 273

Author Index 279

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

From: SIAM <tschoban@siam.org>

Date: Thu, 23 Jun 94 11:22:41

**Subject: Contents, SIAM Applied Mathematics**

Contents

SIAM Journal on Applied Mathematics

Volume 54, Number 5, October 1994

Asymptotic Expansion of the Waiting Time Distribution of Two Models

of a Closed Processor-Sharing System: Heavy Usage

Roberto Barbagallo, Marina Mochi, and Francesco Zirilli

Ignition of a Rectangular Solid by an External Heat Flux

Carlos Vazquez-Espi and Amable Linan

Reconstruction of a Spherically Symmetric Speed of Sound

Joyce R. McLaughlin, Peter L. Polyakov, and Paul E. Sacks

A Uniqueness Theorem for a Lossy Inverse Problem in Reflection Seismology

Bruce J. Chaderjian

Diagonalization of Abel's Integral Operator

Oliver Knill

Localized Eigenmodes of the Induction Equation

Manuel Nunez

Multiple Supercritical Solitary Wave Solutions of the Stationary

Forced Korteweg-De Vries Equation and Their Stability

Lianger Gong and Samuel S. Shen

Chaotic Pulse Trains

N. J. Balmforth, G. R. Ierley, and E. A. Spiegel

Level Sets of Viscosity Solutions: Some Applications to Fronts and

Rendez-Vous Problems

M. Falcone, T. Giorgi, and P. Loreti

Dynamics of Interfaces in Competition-Diffusion Systems

S.-I. Ei and E. Yanagida

On the Evolution of Periodic Plane Waves in Reaction-Diffusion

Systems of (lambda)-(omega) Type

Jonathan A. Sherratt

The Existence of Spiral Waves in an Oscillatory Reaction-Diffusion System

Joseph Paullet, Bard Ermentrout, and William Troy

Stability and Bifurcations of Equilibria in a Multiple-Delayed

Differential Equation

Jacques Belair and Sue Ann Campbell

Turing Instability in Competition Models with Delay I: Linear Theory

S. Roy Choudhury

Analysis of Spatial Structure in a Predator-Prey Model with Delay

II: Nonlinear Theory

S. Roy Choudhury

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

End of NA Digest

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