### Today's Editor:

- Cleve Moler
- The MathWorks, Inc.
- moler@mathworks.com

- Request for Good Matrices and Exercises
- Displacement Non-Newtonian Flow
- Classification of Books
- Re: Direct Poisson Solvers / Rapid Elliptic Solvers
- SIAG/OPT Prize
- Boundary Element Day at University of Bradford
- Object Oriented Numerics Conference
- Two Positions, Univeristy of Texas, Permian Basin
- Chairman Position at Virginia Polytechnic Institute
- Positions at Temple
- Positions at Southern Methodist University
- Special Issue of Quaestiones Mathematicae
- Contents, SIAM Optimization
- Contents: SIAM Discrete Mathematics

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

From: Gil Strang <gs@BOURBAKI.MIT.EDU>

Date: Mon, 2 Nov 92 17:17:31 EST

**Subject: Request for Good Matrices and Exercises**

REQUEST for good matrices and good exercises (especially using MATLAB)

I am writing a new linear algebra text. It is at a more basic level than

my present book ( because student preparation is so varied). The new

book will have short MATLAB codes for the main constructions of linear

algebra. It needs good MATLAB exercises - not difficult but interesting.

Could you send any favorites to me at gs@math.mit.edu with a copy to

moler@mathworks.com ? They could involve a special matrix ( tridiagonal,

Pascal, Vandermonde, ...). They can be on any basic topic: LU, inverse,

basis and dimension, nullspace, least squares, QR, det, evalues,

applications!! Pencil and paper problems are welcome too. They will

be gratefully received, and acknowledged in the book.

Introduction to Linear Algebra will be published this spring for fall 1993.

The manuscript goes from Wellesley-Cambridge Press to the compositor at

Christmas. (Corrections go later.) For printed exercises or codes,

my address is Room 2-240 MIT Cambridge MA 02139. 617 253 4383 fax -4358.

Thank you.

--Gil Strang

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

From: Boerre Johnsen <borre@balder.rf.no>

Date: Mon, 2 Nov 92 14:39:59 MET

**Subject: Displacement Non-Newtonian Flow**

I am Looking at 3 dimensional modeling of non-Newtonian flow in an

eccentric annulus where the surfaces are irregular. One fluid is displaced

by another, the flow regime is laminar. The fluids have different rheology

(Power-law, Bingham) and density.

At the moment I looking for code to do compute the velocity field and

code to transport the fluids given a velocity field.

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

From: David Handscomb <David.Handscomb@na.oxford.ac.uk>

Date: Wed, 4 Nov 92 17:43:42 GMT

**Subject: Classification of Books**

Classification of books in specialist NA + Computer Science libraries

Can any member of the na-net strongly recommend through experience any

particular system for classifying books in a specialist mathematics library

with substantial holdings in numerical analysis and computer science?

My instinct is that Dewey is too coarse-grained for the purpose, while AMS,

though good for general mathematics, falls down on computer science.

Any comments would be welcome.

David Handscomb

Oxford University Computing Laboratory

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

From: Craig Douglas <douglas-craig@CS.YALE.EDU>

Date: Thu, 5 Nov 1992 17:30:52 -0500

**Subject: Re: Direct Poisson Solvers / Rapid Elliptic Solvers**

Nested iteration multigrid methods solve the type of problems referred to

in Atul Chhabra's note in O(N*N) time. A good reference is Hackbusch's

book,

@book{Hackbusch85,

author = "W. Hackbusch",

title = "Multigrid Methods and Applications",

publisher = "Springer--Verlag",

address = "Berlin",

year = "1985"

}

There are fast codes for Poisson's equation in 2 and 3 dimensions as well

as more general elliptic solvers in the MGNet anonymous ftp repository

on casper.cs.yale.edu. To get on the mailing list, please send e-mail

to mgnet-requests@cs.casper.yale.edu.

Craig Douglas

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

From: Tim Kelley <Tim_Kelley@ncsu.edu>

Date: Wed, 4 Nov 92 07:31:16 EST

**Subject: SIAG/OPT Prize**

FINAL CALL FOR NOMINATIONS

FOR

SIAM ACTIVITY GROUP ON OPTIMIZATION (SIAG/OPT) PRIZE

The SIAG/OPT will present its first award at the SIAM Annual

Meeting in July 1993. The award is to be given to the author(s)

of the most outstanding paper, as determined by the prize

committee, on a topic in optimization published in English in a

peer-reviewed journal.

The deadline for receipt of nominations at the SIAM office is November 30.

If you are planning to make a nomination, now is the time. For a copy

of the official call for nominations send e-mail to me (Tim_Kelley@ncsu.edu).

-- Tim

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

From: S. N. Chandler-Wilde <S.N.Chandler-Wilde@bradford.ac.uk>

Date: Wed, 4 Nov 92 20:03:20 GMT

**Subject: Boundary Element Day at University of Bradford**

One day meeting on

BOUNDARY ELEMENT METHODS FOR ACOUSTIC SCATTERING

AND RELATED PROBLEMS

Wednesday 25th November - University of Bradford

Programme

"Inverse Problems Using the Boundary Element Method"

Professor Derek Ingham, University of Leeds

"Electromagnetic Scattering by Dielectric Obstacles"

Dr Paul Martin, University of Manchester

"The BEM Calculation of Electromagnetic Scattering"

Mr X. Q. Mao, Teeside University

"Refined Variational Boundary Element Methods for Acoustic Modelling"

Dr Jean-Pierre Coyette, Numerical Integration Technologies N.V., Leuven, Belgium

"The Application of Boundary Integral Methods in Applied Acoustics"

Dr Y. W. Lam, University of Salford

"Perturbation Methods for the Interaction Between a Structure and a Light Fluid"

Dr Paul Filippi, CNRS Laboratoire de Mecanique et d'Acoustique, Marseille

"Boundary Integral Equation Methods for the Helmholtz Equation in Exterior

Domains"

Dr Sia Amini, University of Salford

"A Boundary Element Method for Outdoor Noise Barriers"

Dr Simon Chandler-Wilde, University of Bradford

N.B. There will be an opportunity to see, during coffee and lunch breaks,

a demonstration of the SYSNOISE software, which analyses acoustic and

coupled acoustic-structure interaction problems using a mixture of finite

and boundary element methods.

For further information, contact:

Chandler-Wilde, Department of Civil Engineering, University of Bradford,

Bradford BD7 1DP, England by 20th November.

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

From: Margaret Chapman <rwave!amc@CS.ORST.EDU>

Date: Wed, 4 Nov 1992 15:54:20 -0800

**Subject: Object Oriented Numerics Conference**

OONSKI'93 CALL FOR PAPERS

OBJECT ORIENTED NUMERICS CONFERENCE

(Sponsored by Rogue Wave Software in Cooperation with SIAM)

Sunriver, Oregon

April 25-27, 1993

Theme: This conference will concern itself with Object-Oriented Numerics:

the use of modern object- oriented techniques in the design of software

solutions to numerical problems.

There will be three separate focus areas:

1. Reusable software components - One of the promises of object-oriented

design is easily reusable code. In this area, papers are invited on the

design and implementation of libraries of numerical classes intended for

use as building blocks in applications.

2. Applications - Only rarely can a large application be built entirely

from off-the- shelf components. More often, application-specific classes

are built by putting together existing components and custom-built

components. In this area papers are invited on application-specific

designs and their object-oriented implementations.

3. Parallelism - Although parallel processing allows far larger numerical

problems to be solved, the algorithms can be difficult to implement. In

this area papers are invited on the use of object-oriented techniques to

manage the complexity of parallel models of computation. Both new

languages and innovative uses of existing languages will be considered.

4. Object Oriented Compiler Technology - Performance with respect to both

memory utilization and speed must always be addressed for numeric

applications. Papers presenting difficulties encountered with current

compiler tools and languages as well as advances in either compiler

implementations and/or language characteristics will be considered.

IMPORTANT DATES:

Papers Due: December 31, 1992

Notification to Authors: February 1, 1993

Camera-Ready Copy Due: March 15, 1992

PROGRAM COMMITTEE:

Richard Bartels, University of Waterloo

Jack Dongarra, University of Tennessee/

Oak Ridge National Laboratory

Mike Holly, Cray Research

Cleve Moler, The Math Works

Allen Robinson, Sandia National Laboratories

Al Vermeulen, Rogue Wave Software

Why OONSKI? The conference is being held in Sunriver, Oregon where you

will find some of the best spring skiing in the country on Mt. Bachelor.

Come Saturday the 24th of April and have a full day of skiing or enjoy one

of the top golf courses in the US. Family members welcome.

INFORMATION:

For general conference information and registration, contact:

Margaret Chapman, Program Coordinator

Rogue Wave Software

PO Box 2328

Corvallis, Oregon 97339

email: amc@roguewave.com

phone: 503-754-3010

fax: 503-757-6650

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

From: M. Paprzycki <M_PAPRZYCKI@utpb.pb.utexas.edu>

Date: Sun, 1 Nov 1992 19:36:04 GMT-0600

**Subject: Two Positions, Univeristy of Texas, Permian Basin**

UNIVERSITY of TEXAS

of the

PERMIAN BASIN

CHAIR

Department of Mathematics and Computer Science seeks a chair at

the rank of Associate Professor or Professor, starting

September 1, 1993. Candidates should have the Ph.D. in computer

science and be able to contribute to both the teaching and

research missions of the department. Preference will be given to

applicants with interests in information systems, database

systems, and software engineering. The teaching load is eight or

nine hours per semester and scholarly activity is expected. The

chair will be offered a nine month appointment with salary up to

$50,000, depending upon qualifications and experience. The

department currently has eight full time faculty and growth is

expected in the next few years. Computing facilities include

several VAX systems and access to a CRAY Y-MP8/864 via remote

login to the UT System Center for High Performance Computing.

UT Permian Basin was, until 1991, an upper level and graduate

only institution. Freshmen were admitted for the first time in

the fall of 1991 and sophomores in the fall of 1992. The State

of Texas requires all faculty in higher education to be

proficient in both written and spoken English. Candidates whose

first language is not English will be expected to provide

evidence of such proficiency.

Interested candidates should send a resume and the names and

addresses of three references to:

Dr. D. F. Hale

Division of Natural Sciences

The University of Texas of the Permian Basin

Odessa, Texas 79762

d_hale@utpb.pb.utexas.edu

Review of files will begin February 1, 1993.

The University of Texas of the Permian Basin is an Equal

Opportunity/Affirmative Action Employer.

===============================================================

UNIVERSITY of TEXAS

of the

PERMIAN BASIN

Pending approval of funding, tenure track position in the

Department of Mathematics and Computer Science at the rank of

Assistant/Associate Professor, starting September 1, 1993.

Candidates should have the Ph.D. in computer science and be able

to contribute to both the teaching and research missions of the

department. Primary teaching responsibility will be in the areas

of information systems, database systems, and software

engineering. Computing facilities include several VAX systems

and access to a CRAY Y-MP8/864 via remote login to the UT System

Center for High Performance Computing. The State of Texas

requires all faculty in higher education to be proficient in both

written and spoken English. Candidates whose first language is

not English will be expected to provide evidence of such

proficiency.

Interested candidates should send a resume and the names and

addresses of three references to:

Dr. D. F. Hale

Division of Natural Sciences

The University of Texas of the Permian Basin

Odessa, Texas 79762

d_hale@utpb.pb.utexas.edu

Review of files will begin on February 1, 1993.

The University of Texas of the Permian Basin is an Equal

Opportunity/Affirmative Action Employer.

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

From: Layne Watson <ltw@cayuga.cs.vt.edu>

Date: Mon, 2 Nov 92 08:10:27 -0500

**Subject: Chairman Position at Virginia Polytechnic Institute**

ANNOUNCEMENT

of the opening for the position of

DEPARTMENT HEAD

in the

Department of Computer Science

at

Virginia Polytechnic Institute and State University (Virginia Tech)

Applications and nominations are invited for the position of Professor

and Head of the Department of Computer Science at Virginia Tech, with

a desired starting date of July 1, 1993.

The Department

Established in 1970, the department currently has 26 faculty members,

250 graduate students (150 in off-campus programs), and 450

under-graduate majors. It offers a B.S., M.S., and Ph.D. in Computer

Science, as well as a Master of Information Systems. Since 1985, the

department has required freshmen to purchase personal computers

running UNIX.

The department's primary research concentrations are in human-

computer interaction; software engineering and systems; numerical

analysis; parallel computation; image processing, multimedia, and

information systems; modeling and simulation; and artificial

intelligence. Facilities include over 100 workstations and personal

computers (DECstation, NeXT, SUN, Macintosh, Amiga, IBM, etc.),

parallel processing units (Sequent, Intel Hypercube), and special

facilities for image processing, multimedia, robotics, and AI.

The University

Located in Blacksburg, adjacent to the scenic Blue Ridge Mountains,

Virginia Tech is a land-grant university of the Commonwealth of

Virginia. Highly selective in admissions, the university enrolls in

its nine colleges some 18,000 undergraduates and 5,000 graduate and

professional students.

Qualifications

A strong research record in human-computer interaction is preferred,

but all major fields in computer science will be considered.

Dedication to excellence in graduate and undergraduate education and a

demonstrated potential for leadership and administration is essential.

Applications

Please send nomination details or applications --- including resume,

cover letter, and the names, addresses, and phone numbers of four

references --- to Professor Edward A. Fox, Dept. of Computer Science,

562 McBryde Hall, Virginia Tech, Blacksburg, VA 24061-0106. Informal

communications may use electronic mail (fox@vtopus.cs.vt.edu) or

telephone (703/231-5113).

Deadline

December 15, 1992, or until position is filled.

We are particularly interested in receiving the

nominations/applications of women and minority candidates.

Virginia Tech is an Equal Opportunity, Affirmative Action employer.

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

From: Daniel B. Szyld <szyld@euclid.math.temple.edu>

Date: Thu, 5 Nov 92 17:27:04 EST

**Subject: Positions at Temple **

TEMPLE UNIVERSITY

The Department of Mathematics seeks to fill one or more tenure-track

positions at the assistant professor level. The search is for talented

researchers and teachers in one or more of the following fields:

Scientific Computing, Nonlinear PDE, Mathematical Physics.

Outstanding applications in other fields will be given serious

consideration as well.

Send applications, including a vita and at least three letters

of recommendation by Dec. 20, 1992 to: Search Committee, Department

of Mathematics, Temple University, Philadelphia, PA 19122-2585.

Temple University is an equal opportunity employer. Women and

minorities are encouraged to apply.

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

From: Ian Gladwell <H5NR1001%SMUVM1.BITNET@ricevm1.rice.edu>

Date: Fri, 06 Nov 92 07:42:12 CST

**Subject: Positions at Southern Methodist University**

Southern Methodist University

Department of Mathematics

The Department of Mathematics at Southern Methodist University invites

applications for a senior mathematician and for two tenure-track assistant

professorships, with employment beginning in Fall 1993. All applicants

must have an excellent research record in physical applied mathematics,

numerical analysis or scientific computation, and a strong commitment to

undergraduate and graduate teaching. Senior applicants must have the

ability to supervise doctoral dissertations; a strong grant record is

desirable. The standard teaching load is two courses (six hours) per

semester.

The Department of Mathematics has an active doctoral program in physical

applied mathematics, numerical analysis and scientific computation;

research interests include asymptotic and perturbation methods,

bifurcation theory, dynamical systems, fluid mechanics, mathematical

biology, mathematical software, nonlinear waves, and the numerical

analysis of differential equations. Fourteen of the seventeen faculty are

applied or numerical mathematicians. Senior faculty include W.E. Ferguson

(numerical partial differential equations), I. Gladwell (mathematical

software), R. Haberman (nonlinear waves), M. Melander (computational fluid

dynamics), G.W. Reddien (numerical bifurcation theory), D.A. Reinelt

(fluid dynamics), and L.F. Shampine (numerical ordinary differential

equations). Southern Methodist University has good Internet connections

and a 20 processor Sequent Symmetry for research use.

The application deadline is January 8, 1993. Send a letter of application

and a vita to: Professor I. Gladwell, Department of Mathematics, Southern

Methodist University, Dallas, Texas 75275 (Tel: (214) 768-2506; Fax:

(214) 768-4138). Junior applicants should arrange for three letters of

recommendation to be sent directly to Professor Gladwell.

I. Gladwell's email addresses:

h5nr1001@cis.vm.smu.edu

gladwell@seas.smu.edu

SMU is an equal opportunity/affirmative action/Title IX employer.

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

From: WSKDPL <WSKDPL@puknet.puk.ac.za>

Date: Fri, 06 Nov 92 09:47

**Subject: Special Issue of Quaestiones Mathematicae **

A special issue of the (usually rather pure) journal Quaestiones

Mathematicae has been devoted to papers presented at the 17th South African

Symposium on Numerical Mathematics held at Umhlanga Rocks on July 15-17,

1991. Ben Herbst and Dirk Laurie acted as guest editors, and all papers

underwent the normal refereeing processes of the Journal.

Non-subscribers can order this special issue at $10 per copy from:

Professor J.J. Grobler

Potchefstroom University for Christian Higher Education

2520 Potchefstroom

South Africa

QUAESTIONES MATHEMATICAE Volume 15, number 3 July 1992

Table of Contents

Mixed finite element methods for one-dimensional problems: A survey

B.D. Reddy

Computing the combined effect of wake-passing and free-stream

turbulence on gas turbine blade boundary layers

D. Greenblatt

Review of geometric continuity, with application to the

construction of $G^2$ continuous curves

M.A. Coetzee and M.L. Baart

Accuracy evaluation of code for the characteristic initial value

problem in general relativity

N.T. Bishop

Order stars and the maximal accuracy of stable difference schemes

for the wave equation

R. Renaut and J.H. Smit

Stable, multi-state, time-reversible cellular automata with rich

particle content

M.J. Ablowitz, J.M. Keiser and L.A. Takhtajan

Numerical homoclinic instabilities in the sine-Gordon equation

B.M. Herbst and M.J. Ablowitz

Stratified sequences of nested quadrature formulas

Dirk P. Laurie

Methods of obtaining collision outcomes for 3-D lattice gases

P.J. Lake

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

From: SIAM <ginsberg@siam.org>

Date: Thu, 05 Nov 92 14:40:37 EST

**Subject: Contents, SIAM Optimization**

SIAM Journal on Optimization

February 1993 Volume 3, Number 1

Contents

A Theoretical and Experimental Study of the Symmetric Rank-One Update

H. Fayez Khalfan, R. H. Byrd, and R. B. Schnabel

A Cutting Plane Approach to the Sequential Ordering Problem (with

Applications to Job Scheduling in Manufacturing)

N. Ascheuer, L. F. Escuerdo, M. Grtschel, and M. Stoer

Error Bound and Reduced)Gradient Projection Algorithms for Convex

Minimization Over a Polyhedral

Zhi-Quan Luo and Paul Tseng

Black-Box Complexity of Local Minimization

Stephen A. Vavasis

Mesh Independence for Nonlinear Least Squares Problems with

Norm Constraints

Matthias Heinkenschloss

A Superlinearly Convergent Polynomial Primal-Dual Interior-

Point Algorithm for Linear Programming

Yin Zhang and Richard A. Tapia

Numerical Continuation and Singularity Detection Methods for

Parametric Nonlinear Programming

Bruce N. Lundberg and Aubrey B. Poore

Remarks on Convergence of Matrix Splitting Algorithm for the

Symmetric Linear Complementarity Problem

Wu Li

Global Convergence of a Class of Trust Region Algorithms for

Optimization Using Inexact Projections of Convex Constraints

A. R. Conn, Nick Gould, A. Sartenaer, and Ph. L. Toint

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

From: SIAM <helfrich@siam.org>

Date: Fri, 06 Nov 92 14:08:11 EST

**Subject: Contents: SIAM Discrete Mathematics**

SIAM Journal on Discrete Mathematics

Vol. 6, No. 1, February 1993

On Error-Correcting Codes and Invariant Linear Forms

A. R. Calderbank and P. Delsarte

Algorithmic Aspects of Neighboring Numbers

Gerard J. Change, Martin Farber, and Zsolt Tuza

On the Structure of the Strong Orientations of a Graph

John Donald and John Elwin

Garden of Eden Configurations for Cellular Atoumata on Cayley Graphs of Groups

Antonio Machi and Filippo Mignosi

The Weighted Sparsity Problem: Complexity and Algorithms

S. Thomas McCormick and S. Frank Chang

Exact Formulas for Multitype Run Statistics in a Random Ordering

Macdonald Morris, Gabriel Schachtel, and Samuel A. Karlin

Characterization of the Homomorphic Preimages of Certain Oriented Cycles

Huishan Zhou

Matchings in the Partition Lattice

E. Rodney Canfield

Communication Complexity and Quasi Randomness

Fan R. K. Chung and Prasad Tetali

Discrete Logarithms in GF(P) Using the Number Field Sieve

Daniel M. Gordon

Polyhedral Properties of Clutter Amalgam

P. Nobili and A. Sassano

Hamilton Cycles that Extend Transportation Matchings in Cayley Graphs of Sn

Frank Ruskey and Carla Savage

A New Triangularization for Simplicial Algorithms

Michael J. Todd and Levent Tuncel

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

End of NA Digest

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