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

- Calendar
- The Lake Arrowhead Matrix and Its Graph
- Singular PDE Systems
- Code Available from Differential Equations Book
- Scientific Computation and Differential Equations
- Mathematical and Computational Issues in the Geosciences
- MSc at University of Hertfordshire
- Position at TU Bergakademie Freiberg
- Position at State University of Sao Paulo
- Re: Positions at King Saud University
- Electronic Transactions on Numerical Analysis
- Contents, Journal of Computational Fluid Dynamics.
- Contents, BIT

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

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

Date: Sun Jul 3 14:13:35 EDT 1994

**Subject: Calendar**

Calendar of Forthcoming Events

Date Topic Place NA Digest #

July 4- 6 South African Numerical Mathematics Umhlanga Rocks, Natal 18

July 5- 7 Simulation of Devices and Technologies Obninsk, Russia 7

July 8- 9 Gigabyte Image Processing Argonne, IL 23

July 11-15 IMACS World Congress Atlanta, GA

July 11-15 Course on MODULEF Finite Elt. Library University Park, PA 12

July 18-29 SERC Numerical Analysis Summer School Leicester, UK 16

July 18-30 Summer Short Courses in CFD Istanbul, Turkey 15

July 18-19 OpenMath Oxford, UK 25

July 19 A# Programming Language Workshop Oxford, UK 22

July 22-23 Control Problems in Industry San Diego, CA 3

July 23 SIAM Forum San Diego, CA 20

July 24 AWM Workshop for Pre- and Post-docs San Diego, CA 3

July 25-29 SIAM Annual Meeting San Diego, CA 3

Aug. 1- 4 Computation Physics Lyngby, Denmark 11

Aug. 1- 5 Computational Science Workshop Los Alamos, NM 16

Aug. 15-19 Math Programming Ann Arbor, MI

Aug. 21-26 Numerical Methods Sofia, Bulgaria 21

Aug. 22-25 Continuum Mechanics Prague, Czech Rep. 6

Aug. 22-25 SVD and Signal Processing Leuven, Belgium 23

Aug. 22-25 Simulation Zurich, Switzerland 9

Aug. 29-31 Algorithms and Parallel VLSI Leuven, Belgium 23

Aug. 29... Mathematical Modelling Prague, Czech Rep. 1

Aug. 29... ICASE Multigrid Short Course Hampton, VA 22

Sep. 6-10 Mathematics in Industry Kaiserslatern, Germany 7

Sep. 12 Scottish Computational Mathematics Strathclyde, Scotland 23

Sep. 22-24 Hellenic Mathematical Society Athens, Greece 8

Sep. 26-27 Acoustics and Electromagnetics Washington, DC 19

Sep. 26-28 Multilevel Methods Meisdorf, Germany 16

Sep. 26-28 Large-Scale CFD Problems Montreal, Canada 24

Sep. 26-30 Total Positivity Jaca, Spain 5

Sep. 26 Dynamics of Discontinuous Systems Bristol, UK 20

Oct. 2- 6 Applications of Operator Theory Winnipeg, Manitoba 17

Oct. 6- 7 Combustion, Environment, and Heating Columbus, Ohio 21

Oct. 6- 7 Large Systems of Equations Wuppertal, Germany 23

Oct. 12-14 Scalable Parallel Libraries Mississippi State, MS 24

Oct. 13-14 60th birthday of Jean Descloux Lausanne, Switzerland 19

Oct. 18-21 High Performance Fortran Manno, Switzerland 24

Oct. 20-22 Systems, Control, Information Wuhan, China 8

Oct. 24-26 Computational Molecular Dynamics Minneapolis, MN 19

Oct. 26-28 Singularities in PDEs Bristol, UK 26

Nov. 7- 9 Adaptive-grid Methods Hampton, VA 26

Nov. 12 Matrix Theory Salt Lake City, UT 21

Nov. 18 Parallell Computing Applications Utrecht, Nethelands 24

Nov. 14-18 SuperComputing '94 Washington, DC 6

Nov. 30... Computational Methods in Engineering Belo Horizonte, Brazil 11

Dec. 16-19 Methods and Applications of Analysis Hong Kong 25

1995

Jan 3- 6 Computational Computer Design Maui, Hawaii 17

Jan. 9-10 Conference Honoring Ake Bjorck Linkoping, Sweden 26

Jan. 15-18 Bond Graph Modeling and Simulation Las Vegas, NV 4

Jan. 16-18 Markov Chains Raleigh, NC 7

Feb. 6- 9 Massively Parallel Computation McLean, VA 26

Feb. 8-10 Computational Issues in the Geosciences San Antonio, TX 27

Feb. 15-17 SIAM Conference on Parallel Processing San Francisco, CA

Feb. 19-25 Applications of Interval Computations El Paso, TX 16

Mar. 20-21 Nonconvex Energy Functions Rutgers, NJ 20

Mar. 28... Multigrid Methods Copper Mountain, CO 24

Mar. 28... Sci. Computation & Diff. Eqns. Stanford, CA 27

Apr. 3- 6 Numerical Methods for Fluid Dynamics Oxford, UK 25

Apr. 24-28 3rd INRIA-SIAM Wave Propagation Conf. Juan-les-Pins, France 19

Apr. 26-30 Numerical Analysis & Applied Math. Constanza,Romania 26

June 6-10 Inertial Manifolds Xi'an, China 21

June 11-14 Iterative Methods in Linear Albebra Blagoevgrad, Bulgaria 22

July 3- 7 ICIAM, Int'l Cong. Indust. Appl. Math. Hamburg, Germany 23

July 10-12 Linear Algebra and Applications Manchester, UK 19

July 16... Mathematics of Numerical Analysis Park City, UT 5

July 17-21 Distributed Parameter Systems Warsaw, Poland 25

Aug. 27-31 Circuit Theory and Design Istanbul, Turkey 25

Sep. 17-21 Acoustics of Submerged Structures Boston, MA 22

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

From: John R. Gilbert <gilbert@parc.xerox.com>

Date: Wed, 29 Jun 1994 17:00:44 PDT

**Subject: The Lake Arrowhead Matrix and Its Graph**

The Lake Arrowhead Matrix and Its Graph

At the 1993 Householder Symposium on Numerical Algebra in Lake Arrowhead,

Nick Trefethen posted a flip chart and invited everyone present to write

their name on it, and to draw lines connecting their name with the names

of all their coauthors. The diagram grew denser throughout the week; at

the end it was a graph with 104 vertices (or people) and 211 edges. Just

for fun, we typed the graph into Matlab and looked at it in a few different

ways. The graph and a Matlab script to view it are available by anonymous

ftp as parcftp.xerox.com:/pub/gilbert/householder.tar.Z .

The original flip chart is now framed on the wall of Nick's office at Cornell.

He promises to bring it along to Householder 2023.

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

From: Alessandro Russo <ALEX17%IPVIAN.bitnet@ICINECA.CINECA.IT>

Date: Mon, 27 Jun 94 10:49:56 ITA

**Subject: Singular PDE Systems**

Sometimes it happens that the solution of a p.d.e.

(and also its numerical approximation) is determined

up to a constant, or even up to a finite dimensional

kernel of big dimension (for instance in magnetostatic

problems, using the vector potential which is determined

up to a gradient).

For this reason, in general one has to solve a linear

system whose matrix is singular, but at least semidefinite,

with a ``compatible'' right hand side.

I noticed that it seems to be a common practice among engineers

to solve this singular system with an iterative method, for

instance conjugate gradient or GMRES, without doing

anything to de-singularize the matrix (for instance,

in the case of Stokes problem, one could fix the value

of pressure at a certain point of the domain).

Is there any theory on this topic?

Any reference will be welcome.

Thank you in advance.

Alessandro Russo

Istituto di Analisi Numerica del CNR

via Abbiategrasso 209

27100 Pavia ITALY

tel. +39-382-529 600

fax +39-382-529 566

e-mail: alex17@ipvian.ian.pv.cnr.it

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

From: William E. Schiesser <wes1@Lehigh.EDU>

Date: Fri, 01 Jul 1994 16:12:51 EDT

**Subject: Code Available from Differential Equations Book**

The programs (Fortran 77 source code) in the book:

Computational Mathematics in Engineering

and Applied Science: ODEs, DAEs and PDEs

CRC Press, Inc.

2000 Corporate Blvd., N.W.

Boca Raton, FL 33431

ISBN: 0-8493-7373-5

(1994)

are available on a DOS-formatted diskette. At present, we cannot provide

the programs via e-mail or ftp because some printed information is also

included. However, the package with the diskette will be sent by first

class mail (US), or by international air mail (outside the US), so receipt

should be within 10 days.

Requests can be sent to:

W. E. Schiesser

Iacocca Hall, D307

Lehigh University

111 Research Drive

Bethlehem, PA 18015 USA

(610) 758-4264 (office)

(610) 758-5057 (fax)

wes1@lehigh.edu (Internet)

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

From: Robert Skeel <skeel@cs.uiuc.edu>

Date: Mon, 27 Jun 1994 19:50:54 -0500

**Subject: Scientific Computation and Differential Equations**

Second Announcement

SciCADE 95

International Conference on

Scientific Computation and Differential Equations

Stanford, California, March 28--April 1, 1995

This meeting will feature current research in scientific computing with

an emphasis on the numerical solution of differential equations in science

and engineering, particularly ordinary differential equations.

The meeting will close with a celebration of the sixtieth birthday of

C. William Gear. Watch for the third announcement in the NA Digest.

Alternatively, send a message to scicade@sccm.stanford.edu with

enquiries and for future mailings.

Plenary speakers include

W. Beyn S. Campbell P. Deuflhard L. Dieci

C.W. Gear C. Grebogi E. Hairer W. Kahan

C. Lubich T. Mitsui E. Platen A. Sameh

J.M. Sanz-Serna T. Schlick L.F. Shampine P. Shirkov

J. Simo J. White S. Wright

Minisymposia (and their organizers) include

Boundary Value Problems (U. Ascher)

ODEs in Chemical and Atmospheric Sciences (Z. Zlatev)

Computing Invariant Sets (I. Kevrekidis)

Delay Differential Equations (A. Iserles)

Differential-Algebraic Equations I (S. Campbell)

Differential-Algebraic Equations II (R. Maerz)

Educational Issues (K. Stewart)

Hamiltonian Systems (J. Sanz-Serna)

Linear Algebra Issues (P. Saylor)

Long-time Integration (D. Stoffer)

Multibody Dynamics (K. Clark)

Numerical Methods for Stochastic Differential Equations (E. Platen)

ODE methods in PDEs (R. Russell)

ODE Software (A. Hindmarsh)

Parameter Estimation and Design Optimization (S. Wright)

Practical Parallel Methods (K. Burrage)

Shadowing (H. Kocak)

Trajectory Control (K. Brenan)

Validated Computation of ODE Solutions (H. Stetter)

Waveform Relaxation (J. White)

Call for papers. There is limited room in the program for contributed talks of

15 or possibly 30 minutes duration, for poster presentations, and for software

demonstrations. If you are interested in contributing to the program, please

send an abstract by November 15, 1994 by email (LaTex preferred but plain text

ok) to

freppert@cs.umn.edu

if possible; otherwise, send hard copies in triplicate to

Ms. Liz Freppert

Computer Science Department

University of Minnesota

200 Union Street S.E., Room 4-192

Minneapolis, MN 55455

FAX 612 625 0572

by November 15, 1994. In the case of a regular oral presentation, send an

extended abstract one page in length; otherwise send a half-page abstract.

Contributors can expect to be notified by December 30.

In your submission indicate which of the alternatives are acceptable:

*poster *software demo *15-minute talk *30-minute talk

For a software demo specify equipment needed or desired.

Space for commercial demos is also possible.

Contributions on scientific computing topics other than ODEs are encouraged.

There may be space in the program for an additional

mini-symposium. If you are interested in organizing one, please contact

L. Petzold (petzold@cs.umn.ed) by August 15.

There will be a special issue of SISC covering the conference

(refereed in the usual way) to honor Bill Gear's many contributions

to SIAM and to scientific computing.

Organizing committee: Gene Golub (Stanford), Linda Petzold (Minnesota),

Robert Skeel (Illinois), Andrew Stuart (Stanford)

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

From: Trini Flores <flores@siam.org>

Date: Tue, 28 Jun 94 09:46:38 EST

**Subject: Mathematical and Computational Issues in the Geosciences**

Third SIAM Conference on Mathematical and

Computational Issues in the Geosciences

February 8-10, 1995

St. Anthony Hotel, San Antonio, Texas

Deadline for submission of minisymposium proposals:

JULY 11, 1994.

Deadline for submission of contributed abstracts:

AUGUST 8, 1994.

SIAM encourages electronic submissions of minisymposium

proposals and abstracts. To help in formatting your

submissions, plain TeX or LaTeX macros are available by

contacting SIAM at meetings@siam.org.

To obtain a copy of the call for papers for the conference,

e-mail your requests to meetings@siam.org and the

information will be sent to you electronically. You may

also refer to gopher.siam.org.

The conference organizing committee looks forward to your

participation in this conference.

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

From: Bartholomew-Biggs <M.Bartholomew-Biggs@herts.ac.uk>

Date: Mon, 27 Jun 1994 14:54:45 +0100 (BST)

**Subject: MSc at University of Hertfordshire**

M Sc Studies at the University of Hertfordshire

The Mathematics Division of the University of Hertfordshire offers

conversion M Sc's in Numerical Computation, Mathematical Modelling and

Mathematical Studies. These courses are aimed at graduates in

disciplines such as Science or Engineering who have some mathematical

background which they would now like to develop further.

Full details can be obtained by contacting:

Mike Bartholomew-Biggs

Mathematics Division

University of Hertfordshire

Hatfield

England

M.Bartholomew-Biggs@herts.ac.uk.

Please quote your full surface mail address.

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

From: M. Eiermann <eiermann@blauwal.mathe.ba-freiberg.de>

Date: Wed, 29 Jun 1994 11:27:11 -0600

**Subject: Position at TU Bergakademie Freiberg**

FREIBERG UNIVERSITY OF MINING AND TECHNOLOGY

Department of Mathematics and Computer Science

The department invites applications for a

C3-professorship in Mathematical Optimization.

The appointment would commence in April 1995 and would fill the

position currently held by Prof. Dr. M. Schoch.

Candidates should have a substantial background in each of the

following areas: Linear optimization, discrete optimization,

parametric and vector optimization, and mathematical modelling.

In addition, applicants should have established an international

reputation in two of these areas.

Teaching obligations will be in mathematics for students of mathe-

matics and computer science as well as as for students of economics.

The university is committed to increase the number of women in

scientific positions. Qualified women are particularly encouraged

to apply.

Aplications, including a vita, a list of papers, and a confirmed

copy of the document of the highest academic degree, should be

sent to:

TU Bergakademie Freiberg

D-09596 Freiberg (Germany).

The deadline for applications is September 30, 1994.

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

From: Heloisa Helena Marino Silva <HSILVA@nimitz.ibilce.unesp.br>

Date: Fri, 1 Jul 1994 11:45:29 GMT-03

**Subject: Position at State University of Sao Paulo**

THE DEPARTMENT OF COMPUTER SCIENCE AND STATISTIC

IBILCE-UNESP

BRAZIL

located in S. J. Rio Preto, in the state of Sao Paulo, is looking for

PhD graduates (or soon to be) working on Numerical Analysis that would

like to work for a short period or maybe permanently.

Those interested should send a Curriculum Vitae including a publication

list (if aplicable) to:

HSILVA@NIMITZ.IBILCE.UNESP.BR

or by post to:

Dr. HELOISA H. M. SILVA

DCCE-IBILCE-UNESP-SJRP

RUA CRISTOVAO COLOMBO, 2265

C. P. 136

CEP: 15054-000-S. J. RIO PRETO-S. P.-BRAZIL

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

From: Omar Hamed <F40M001%SAKSU00.BITNET@VTBIT.CC.VT.EDU>

Date: Sat, 02 Jul 94 14:18:03 SLT

**Subject: Re: Positions at King Saud University**

Announcement From

The Department of Mathematics

College Of Sciences

King Saud University

Riyadh

Saudi Arabia

E-mail: F40M043@SAKSU00.BITNET

Further to our previous announcement of vacancies in the department

we request that applicants use the e-mail for short communications only

Lenghty resumes and publication lists should be sent by air mail.

Recommendation letters are not required at this stage. A photograph is

also not required.

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

From: ETNA <etna@etna.mcs.kent.edu>

Date: Fri, 1 Jul 1994 16:19:50 -0500 (EDT)

**Subject: Electronic Transactions on Numerical Analysis**

ELECTRONIC TRANSACTIONS ON NUMERICAL ANALYSIS

Electronic Transactions on Numerical Analysis (ETNA) is an electronic journal

for the publication of significant new and important developments in numerical

analysis and scientific computing. In addition to the rapid publication of

scholarly work, ETNA permits the publication of manuscripts containing

COLOR figures, diagrams, or photographs.

An individual who wishes to obtain a copy of a current or back manuscript can

get a copy through World Wide Web (URL http://etna.mcs.kent.edu) browser such

as Mosaic or Lynx. ETNA is also available through Gopher (etna.mcs.kent.edu),

anonymous ftp (etna.mcs.kent.edu), or through e-mail (send e-mail to

mailer@etna.mcs.kent.edu containing the phrase: send index).

To register to receive ETNA's quarterly list of titles and abstracts, please

send an e-mail message to etna@mcs.kent.edu. The subject of the message

should be: ETNA registration. Titles and abstracts of papers published in

ETNA will be e-mailed quarterly to the return addresses of all such requests.

Inquiries for further information should be e-mailed to etna@mcs.kent.edu.

The contents of the June issue of ETNA is

Electronic Transactions on Numerical Analysis

Volume 2, 1994

Minimization properties and short recurrences for Krylov subspace

methods. Rudiger Weiss.

File: vol.2.1994/pp57-75.ps

Efficient iterative solution of linear systems from discretizing

singular integral equations. Ke Chen.

File: vol.2.1994/pp76-91.ps

Modified Specht's plate bending element and its convergence analysis.

T.M. Shih and Junbin Gao.

File: vol.2.1994/pp92-103.ps.

Arden Ruttan, Managing Editor, ETNA

Department of Mathematics and Computer Science

Kent State University, Kent Ohio

e-mail etna@mcs.kent.edu

tel 216-672-4004x270

fax 216-672-7824

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

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

Date: Wed, 29 Jun 1994 14:26:05 -0400

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

Contents

INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS

Vol. 2, No. 1, 1994

Finite Element Method for Boussinesq Wave Analysis

M. Kawahara and J. Y. Cheng

A Finite-Volume Method for Fluid Flow Simulations with Moving Boundaries

Y. G. Lai and A. J. Przekwas

Modelling and Computation of Arc-Flow Interaction in Circuit-Breakers

X. D. Zhang, J.-Y. Trepanier and R. Camarero

Numerical Prediction of Laminar Flow in Plane Bifurcating Channels

M. Hortmann and M. Schafer

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

From: Ake Bjorck <akbjo@math.liu.se>

Date: Mon, 27 Jun 94 08:43:07 +0200

**Subject: Contents, BIT**

Contents

BIT Volume 34, No. 2 (1994)

A numerical study of optimized sparse preconditioners

A.~M. Bruaset and A. Tveito, pp. 177--204

On a fast and accurate method for computing Fourier transforms

P.~C. Chakravarti and M. Barrientos, pp. 205--214

Parallel frontal methods for ODEs

M.~R. Crisci, pp. 215--227

Stability estimates based on numerical ranges with an application

to a spectral method.

J.~L.~ M van Dorsselear and W. Hundsdorfer, pp. 228--238

Iterative refinement for constrained and weighted linear least squares

M. Gulliksson, pp. 239--253

Asymptotic error expansion for the Nystr\"om method of nonlinear

Fredholm integral equations of the second kind

G. Q. Han, pp. 254--261

A stability property of $A$-stable natural Runge-Kutta methods

for systems of delay differential equations

T. Koto, pp. 262--267

Relationship between tetrahedron shape measures

A. Liu and B. Joe, pp. 268--287

Optimal stochastic quadrature formulas for convex functions

E. Novak and K. Petras, pp. 288--294

A characterization of compactly supported orthonormal wavelets

J. Schneid, pp. 295--303

A summability method for the arithmetic Fourier transform

W. J. Walker, pp. 304--309

Symplectic Runge-Kutta methods with real eigenvalues

E. Hairer and G. Wanner, pp. 310--312

A note on best conditioned preconditioners

X.-Q. Jin, pp. 313--317

Some remarks on Dvorcuk's root-finding method

N. Kjurkchiev and K. Mahdi, pp 318--322

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

End of NA Digest

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