NA Digest Sunday, July 24, 1994 Volume 94 : Issue 30

Today's Editor:
Cleve Moler
The MathWorks, Inc.

Submissions for NA Digest:

Mail to

Information about NA-NET:

Mail to


From: Toby Driscoll <>
Date: Mon, 18 Jul 1994 06:01:34 -0400
Subject: Schwarz-Christoffel Toolbox for Matlab

Update of the Schwarz-Christoffel Toolbox for Matlab

I've recently completed some significant additions to the
Schwarz-Christoffel Toolbox for Matlab.

The Schwarz-Christoffel Toolbox for Matlab 4 is a collection of
M-files for the interactive computation and visualization of
Schwarz-Christoffel conformal maps. The Schwarz-Christoffel
transformation is a formula for a conformal map from the upper
half-plane to the interior of a polygon, which may have slits
or vertices at infinity. The transformation can also be modified to
produce maps from the unit disk, an infinite strip, or a rectangle,
or from the disk to the exterior of the target polygon.

Major features of the toolbox include:

Graphical input of polygons

Solution of the parameter problem for half-plane, disk, strip,
rectangle, and exterior maps

Computation of forward and inverse maps

Adaptive plotting of images of orthogonal grids for

Command-line and graphical user interfaces

Online and Postscript documentation

The toolbox requires Matlab 4.1 or later, except under MS-Windows,
where version 4.0 is sufficient. Little Matlab expertise is required.

Version 1.2 has several improvements over version 1.0, most notably
the ability to work with maps from a strip or a rectangle. This
capability is useful when dealing with elongated polygons. There are
also improvements in speed and in the graphical interface, including
the drawing routine.

The Schwarz-Christoffel Toolbox can be obtained by anonymous ftp to, in the directory pub/driscoll/SC-Toolbox, or at
the MathWorks ftp site,, in the directory
pub/contrib/misc/sct-12. Version 1.2 of the toolbox is available in
the shar file, and the Postscript documentation is in the

Toby Driscoll
Center for Applied Mathematics
Cornell University
Ithaca, NY 14853

Phone: (607) 255-8272


From: Barak Galanti <>
Date: Tue, 19 Jul 1994 01:47:49 +0200
Subject: Looking for SMAC Navier Stokes Codes

Dear NA-Netters,

I am looking for codes implementing the SMAC (Simplified
Marker-and-Cell) for incompressible Navier Stokes equation in any
geometry and boundary conditions. Source codes in Fortran or
C are mostly convenient, but any other pointer or reference is also

Thanks in advance,
Barak Galanti


From: Stuart Doole <>
Date: Wed, 20 Jul 1994 20:07:27 +0000 (BST)
Subject: Matrix Spectrum Problem

Eigenvalues/ Matrix Spectrum problem

My colleague and I have been looking at a wave propagation problem
and currently are faced with the following type of matrix:
[ ]
[ 0 I ]
[ ]
[ -C -B ]
[ ]

I is the identity matrix
C is a diagonal matrix with positive entries
B is a symmetric matrix

How much can be said about the spectrum/eigenvalues of the above
matrix if no other information is known. (The general form of
the entries of C and B are known but the stated properties
seem to be the only apparent ones).
General enquiries amongst friends have
either drawn a blank or the response
that nothing definite can be said.

Alternatively, one might ask about the system

A'' + B*A' + C*A =0

where A is a vector and wonder about the stability theory.

Any useful references or ideas would be warmly appreciated.

Stuart Doole
Dept of Engineering Maths
Bristol University


From: Ira Hammerman <>
Date: Thu, 21 Jul 94 11:13:34 +0300
Subject: Prolate Spheroidal Functions

Is there code available for dealing with Prolate Spheroidal Functions?
Thank you,
Ira Hammerman <>


From: Kermit Sigmon <>
Date: Thu, 21 Jul 94 10:14:46 EDT
Subject: MATLAB Primer, 4th Edition

The Fourth Edition of the MATLAB Primer will be available
in mid-August 1994 from CRC Press.

Features of the new edition include:
New compact, reader-friendly, bound format.
Features of Version 4.2 of MATLAB blended into the text.
Substantial new section on the Symbolic Math Toolbox.
Extensive general revision and reformatting.
A fine-grained Table of Contents and detailed Index.
Same character and purpose of of the earlier editions:
(To help students and others begin to use MATLAB)

Ordering Information:
Mail Orders (both national and international):
CRC Press, Inc.
2000 Corporate Blvd., N.W.
Boca Raton, FL 33431

Telephone Orders:
Continential USA, except Florida: 1-800-272-7737
Florida and outside Continential USA: 1-407-994-0555

The expected price is $12.95.

The MATLAB Primer is no longer available as TeX source.


From: Roger Haggard <>
Date: Fri, 22 Jul 1994 14:41:45 -0500 (CDT)
Subject: Parallel Processing PC Boards?

I am looking for some kind of parallel processing board that will
plug into a standard IBM-compatible Personal Computer to
provide a significant speedup of some computation-intensive code.
I seem to remember some ads for I860 or I960 or transputer boards
somewhere, but now I cannot find them. Any pointers would
be very helpful.


Dr. Roger L. Haggard, Assistant Professor
EE Department, Box 5004 FAX: (615)372-6172
Tennessee Tech University Email: RLH0750@TNTECH.EDU
Cookeville, TN 38505 Phone: (615)372-3453


From: Markus Hegland <>
Date: Thu, 21 Jul 1994 15:38:43 +1000
Subject: New Report Series from ANU

New report series at ANU in scientific computing

The "Area 4 Working Note Series" have resulted from a collaboration bewteen
the Australian National University (ANU) and Fujitsu Ltd. Japan.
The software developed in this collaboration is incorporated in the
Fujitsu mathematical library or SSLII/VPP on the VPP500 series.

Authors of the Area 4 Working Notes include Richard P. Brent, Andrew J.
Cleary, Markus Hegland, Zbigniew Leyk and Mike Osborne. They cover various
topics from numerical linear algebra, FFTs and random number generation.

The Area 4 Working Note Series can be accessed with Mosaic using URL


Further information can be obtained from

Markus Hegland
Program in Advanced Computation
CMA, School of Mathematical Sciences Phone: + 61 (0)6 249 4405
and CSL, Res. Sch. Inf. Sci. Eng. Phone: + 61 (0)6 249 3011
Australian National University Fax: + 61 (0)6 249 5549
CANBERRA ACT 0200 Email:


From: Steve McCormick <stevem@newton.Colorado.EDU>
Date: Wed, 20 Jul 94 20:26:26 -0600
Subject: Date Change for Copper Mountain Multigrid Conference


Due to incorrect estimates by Copper Mountain Resorts of their low
season schedule, we have found it advisable to move the conference
back one week. We apologize if this has caused any inconvenience.
However, we will also take this opportunity to change the cost of
student registration: it is now gratis. Please encourage students
to attend and/or submit a paper to the student competition!



Copper Mountain, Colorado
April 2 - April 7, 1995

The University of Colorado
Front Range Scientific Computations, Inc.
The Society for Industrial and Applied Mathematics

Department of Energy
National Aeronautics and Space Administration


Tom Manteuffel and Steve McCormick,
University of Colorado


Joel Dendy, Los Alamos National Laboratory
Van Henson, Naval Postgraduate School
Jan Mandel, University of Colorado at Denver
Duane Melson, NASA Langley
Seymour Parter, University of Wisconsin
Joseph Pasciak, Brookhaven National Laboratory
John Ruge, University of Colorado at Denver
Klaus Stueben, Gesellschaft f. Math. u. Datenverarbeitung
Pieter Wesseling, Delft University
Olof Widlund, Courant Institute


Paul Frederickson, RIACS


Craig Douglas, IBM/CERFACS/Yale


Circus: forum for late-breaking results
Workshops: informal discussions on topics of interest
Student Paper Competition: travel support and special session
Proceedings: NASA Conference Publication
Special Journal Publication of Proceedings: to be arranged


Student Papers Dec. 1, 1994
Abstracts Jan. 1, 1995
Lodging Reservations Feb. 28, 1995
Early Registration Feb. 28, 1995
Papers for Proceedings Apr. 2, 1995 (at conference)


Anyone who wants to give a talk and will not be in the regular
session may do so at one of the Circus sessions. Each session will
begin by asking who wishes to speak and setting the Circus schedule
accordingly. To provide a more informal atmosphere for discussion,
there will also be time set aside for Workshops on specific topics
of interest. The schedule for the Circus and Workshops will be
determined each day according to demand.


Travel and lodging assistance will be awarded to students judged to
have the best research papers. Papers with original research due
mainly to the student must be received before December 1, 1994. They
must be singly authored and no more than 10 pages in length. Sending
only an abstract is unacceptable. A panel of judges will determine
the best papers. Authors of the three best papers will be given a
travel stipend, free lodging, and registration, and will be expected
to present their papers in a special session at the conference.
Several other students who participate in the competition may be
awarded free lodging and registration, depending on availability of


There will be morning and late afternoon lectures of approximately
25 minutes each. Evenings will be reserved for the Circus and
Workshops. Afternoons will be open for more informal workshops and


Potential contributors should submit an abstract of no more than
200 words by hard copy regular mail or, preferrably, by postscript
or ASCII email to:

University of Colorado
Program in Applied Math
CB 526
Boulder CO 80309-0526

If you submit your abstract by email, please do NOT send a TeX or
LaTeX file. It will be returned if you do. Instead, please send
either a ps file or an ASCII file.

Authors will be notified of the status of their abstract by the end
of January. Those notified of acceptance may then submit their paper
to the proceedings by bringing hard copy to the conference. Authors
who wish to make their paper generally available will be encouraged
to submit a ps file to mgnet.



Steve McCormick
University of Colorado
Program in Applied Math
CB 526
Boulder CO 80309-0526



From: Ivan Dimov <ivdimov@BGCICT.BITNET>
Date: Fri, 22 Jul 1994 09:22:03 +0200
Subject: Numerical Methods Conference in Bulgaria

of the 3rd International Conference on
Sofia, 21-26 August, 1994
(Key and Invited lectures)
9:00 - 9:15 Opening of the Conference
9:15 - 10:00 Z. Zlatev, I. Dimov, K. Georgiev, Optimizing large air
pollution models on high speed computers.
10:30 - 11:15 V. Thomee On the numerical solution of an evolution equation
with memory.
11:15 - 12:00 H. Chen, R. Ewing, R. Lazarov, Superconvergence of the mixed
finite element approximations to parabolic equations.
12:00 - 12:35 I. Dimov, A. Karaivanova, Overconvergent Monte Carlo
methods for density-function modelling using B-splines.
14:00 - 14:45L. Xanthis, The method of arbitrary lines: recent advances
in computational mathematics and mechanics.
14:45 - 15:20 Chr. Christov, A. Ridha, Splitting scheme for iterative
solution of biharmonic equation. Application to 2D
15:20 - 15:55 T. Rusten, A numerical method for solution of partial
differential equations modelling of the solidification of a binary alloy.
16:20 - 17:05 T.F. Chan, B. Smith, J. Zou, Multigrid and domain
decomposition methods for unstructured meshes.
17:05 - 17:40 I. Lirkov, S. Margenov, On circulant preconditioning of
elliptic problems in L-shaped domains.
17:40 - 18:15 B. Philippe, M. Sadkane, Arnoldi s procedure and angles
between Krylov subspaces.
9:00 - 9:35 Bl. Sendov, Parallel approximation with self-similar
9:35 - 10:10S. Dimova, M. Kaschiev, M. Koleva, D. Vasileva, Numerical
analysis of blow-up nonradial solutions of a nonlinear heat-transfer
10:30 - 11:15 J. Bramble, A least squares approach based on a discrete
minus one inner product for first order systems.
11:15 - 12:00 O. Axelsson, M. Neytcheva, The Short Length AMLI Method-II.
Rate of convergence.
12:20 - 12:40 J.Claver, Fine and medium parallel algorithms for the
Lyapunov's equations on a shared memory multiprocessor.
14:00 - 14:45 R. Ewing, Yu. Kuznetsov, R. Lazarov, S. Maliassov,
Preconditioning of nonconforming finite element approximations of second
order elliptic problems.
14:45 - 15:20 P. Vassilevski, O. Axelsson, A two-level stabilizing
framework for interface domain decomposition preconditioners.
15:20 - 15:55 T. Mathew, A splitting method for parabolic problems using
domain decomposition.
16:20 - 16:55 G. Bourdin, J. Greenberg, A. Le Roux, A numerical scheme for
a quadratic porous media equation.
16:55 - 17:30 J. Wang, T. Mathew, Mixed finite element method over
17:30 - 18:05 P. Vabishchevich, Parallel domain decomposition algorithms
for time-dependent problems of mathematical physics.
9:00 - 9:35 G. Gibson, C. Glasbey, D. Elston, Monte Carlo evaluation of
multivariate normal integrals and sensitivity to variate ordering.
9:35 - 10:10 C. Jacoboni, M. Nedjalkov, Monte Carlo modelling of quantum
electron transport in semiconductor structures. Simulations and
Scientific Computing
10:30 - 11:05 G. De Pietro, On the implementation of numerical methods on
parallel computers.
11:05 - 11:40 M. Kartalev, M. Kaschiev, D. Koitchev, Numerical Modeling
of stationary two-dimensional magnetosphere.
11:40 - 12:15 M. Chacha, St. Radev, R. Occeli, L. Tadrist, Liquid jet
disintegration analysis: direct numerical simulation.
12:15 - 12:50 A. Liolios, A bounding numerical approach to seismic
interaction between adjacent buildings.
9:00 - 9:45 O. Spaniol, Ch. Engel, Parallel processing of communication
9:45 - 10:30 D.J. Evans, Parallel solution of linear systems by implicit
matrix elimination.
10:50 - 11:25 W. Schade, V. Jossifov, I. Koepp, A parallelized placement
algorithm for printed circuit board design.
11:25 - 12:00 H. Kuchen, H. Stolze, A data parallel functional language
for distributed memory machines.
12:00 - 12:35 G. Megson, V. Aleksandrov, I. Dimov, A fixed sized regular
array for matrix inversion by Monte Carlo method.
9:00 - 9:45 G. Milovanovic, Summation of slowly convergent series via
9:45 - 10:20 J.-F. Carpraux, S. Godunov, S. Kuznetsov, Stability of the
Krylov basis and subspaces.
10:20 -10:55 A.A. Samarskij, Stability of difference schemes.
11:15 - 12:00 M. Vajtersic, Two classes of efficient hypercube orderings
for SVD.
12:00 - 12:35R. Beauwens, L. Dujacquier, S. Hitimana, M.monga-Made,
MILUfactorizations for 2-processor orderings.


From: Svetozar D. Margenov <>
Date: Tue, 19 Jul 94 17:47:16 PDT
Subject: IMACS Symposium on Iterative Methods

Second IMACS International Symposium on
Iterative Methods in Linear Algebra
June 18-21, 1995, Blagoevgrad, Bulgaria

Organized by: The International Association for Mathematics and
Computers in Simulation and Bulgarian Academy of Sciences(BAS)

International Program Committee:
OWE AXELSSON(KUN,Nijmegen,The Netherlands),
ROBERT BEAUWENS(ULB, Brussels, Belgium),
TONY CHAN(UCLA, Los Angeles, USA),
IVAN T. DIMOV(CICT at BAS, Sofia, Bulgaria),
STEFKA DIMOVA(Sofia University, Bulgaria),
JACK DONGARRA(University of Tennessee,USA),
IAIN DUFF(Rutherford Appleton Lab., Oxon, UK),
RICHARD E. EWING (TA & MU, College Station, USA),
ROLAND FREUND(AT&T Bell Lab., Murray Hill, USA),
PIET HEMKER (CWI, Amsterdam, The Netherlands),
OLEG ILIEV (IM at BAS, Sofia, Bulgaria),
MICHAIL KASCHIEV(IM at BAS, Sofia, Bulgaria),
DAVID KINCAID (CNA, University of Texas at Austin, USA),
YOUSEF SAAD (University of Minnesota, Minneapolis, USA),
HARRY YSERENTANT (Univ. of Tuebingen, Germany),
HENK VAN DER VORST (RUU, Utrecht, The Netherlands),
JUNPING WANG(University of Wyoming, Laramie,USA),
RAGNAR WINTHER(University of Oslo, Norway),
DAVID H. WOOD(University of Delaware, USA)

MATRIX ANALYSIS(convergence acceleration,preconditioning
techniques, methods for nonsymmetric, indefinite, singular
and overdetermined systems, sparse eigenproblems);
APPLICATIONS to PDEs(multigrid methods, domain decomposition
methods, spectral methods), systems theory, least square
problems, parallel matrix computation;
SOFTWARE DEVELOPMENT(sparse linear systems, sparse eigenproblems,
application oriented software; on sequential machines; on parallel

Deadline for submission of abstracts (one page stating clearly
the originality and importance of the results): October 1994
Notification of acceptance of the papers on the basis of
the submitted abstracts mailed by: January 1995
Deadline for submission of full papers: March 1995
Notification of acceptance of full papers mailed by: April 1995

Special Sessions
"The influence of high-nonnormality on the reliability of iterative
methods in Computational Linear Algebra", by Francoise Chatin-Chatelin,
University of Paris IX and Valerie Fraysee, CERFACS
"Krilov-subspace methods for nonsymmetric and indefinite linear
systems", by Roland Freund, AT & T Bell Lab., Murray Hill, USA
"Iterative Monte Carlo methods", by Ivan T. Dimov, CICT at BAS, Bulgaria
Robust Preconditioners" or "Industrial Problems", by Yousef Saad,
University of Minnesota, Minneapolis, USA


Conference address: E-mail: imacs95@bgearn.bitnet
Panayot S. Vassilevski or panayot@bgearn.bitnet
Second IMACS Int.Symp. on
Iterative Methods in Linear Algebra
CICT at Bulgarian Academy of Sciences
"Acad. G.Bontchev" street, block 25A
1113 Sofia, Bulgaria


From: Roy Williams <>
Date: Wed, 20 Jul 1994 09:19:53 -0700 (PDT)
Subject: Course on Parallel CFD in Stuttgart

European Research Community On Flow Turbulence And Combustion announces:
ERCOFTAC Course On Parallel Computational Fluid Dynamics
Stuttgart, Germany
October 17 - 20, 1994

The course is addressed to CFD specialists from research and industry who
want to port their code to a parallel computer. There will be two lecturers
per day, which talk each for 3 hours. The lectures deal to a large extent
with implementation and programming questions as well as with experiences
gained so far from parallel machines. There is less emphasis on mathematical
features or computer science basics.

Introduction to Parallel Computers
Dr. Dave Emerson, Daresbury Laboratory

Message Passing: PVM and MPI
Dr. Hans-Georg Paap, Genias

Introduction to High Performance Fortran and Fortran 90
Dr. Dieter Eppel, GKSS Research Center

A General Parallelization Strategy for Multi Domain CFD Codes using C
Prof. Jochem Hauser, CLE

Domain decomposition for unstructured grids
Dr. Roy D. Williams, Caltech

Example of porting an unstructured code to a Parallel Computer
Dr. Ramesh Agarwal, McDonnell Douglas

Example of Porting a flow solver using structured grids to a Parallel Computer
Prof. Siegfried Wagner, University of Stuttgart

Practical experiences with Massively Parallel Computing
Prof. Egon Krause, RWTH-Aachen

Dr. D. Emerson, Daresbury Laboratory, UK
Prof. J. Hauser, Center of Logistics and Expert Systems, Germany
Prof. E.H. Hirschel, DASA, Munchen, Germany
Prof. E. Krause, RWTH-Aachen, Germany
Prof. S. Wagner, University of Stuttgart, Germany
Dr. J.B. Vos, ERCOFTAC Coordination Center, Lausanne, Switzerland

The course is sponsored by:
European Space Agency (ESA)
European Research Community on Flow, Turbulence and Combustion (ERCOFTAC)
Institut fur Aero- und Gasdynamik, Universitat Stuttgart
Rechenzentrum Universitat Stuttgart

A complete set of lecture notes will be handed out at the course.

University: 750.-DM
Industry: 1000.-DM

A limited amount of ERCOFTAC scholarships are available for Ph.D Students
or researchers from East European countries. Please contact the local
organizer for more details.

The registration fee covers lunches, coffee breaks, lecture notes and a
course dinner.

Prof. S. Wagner
Institut fur Aero- und Gasdynamik
University of Stuttgart
Pfaffenwaldring 21
D-70550 Stuttgart

Tel.: +49 711 685 34 01
FAX: +49 711 685 34 38


Dr. Jan B. Vos
ERCOFTAC Coordination Cneter
CH-1015 Lausanne

Tel.: +41 21 693 53 05
FAX: +41 21 693 53 07


From: Jack Dongarra <>
Date: Thu, 21 Jul 1994 09:23:30 +0200
Subject: EURO-PVM Call for Papers

European PVM Users' Group Meeting
Rome, Italy
October 9-11 1994, Universita' di Roma, Rome


Sponsored by
IBM European Center for Scientific and Engineering Computing
Ecole Normale Superieure de Lyon CASPUR-Universita' di Roma

The first European PVM Users Group Meeting will be held October 9 to
11, 1994, at the Conference Room of the University of Rome, Via Salaria
113, Rome, Italy.
The meeting will provide an opportunity for European users of PVM to
meet each other, share ideas and experiences, and meet some of the
members of the PVM Team.

The conference will include:
* Invited talks by:
Wolfgang Gentzsch (Genias, Germany),
Vaidy Sunderam (Emory University),
Bernard Tourancheau (LIP, France),
... TBD ...
... TBD ...
* Contributed papers from the PVM user community.
* Technical presentations by the developers of PVM.
(Including a feedback session on future directions and features)
* Vendor presentations on supported PVM products.
* Social activities.
* Tutorial Session (Sunday 9th) by:
Adam Beguelin (CMU, USA),
Robert Manchek (UT, USA).

There will be Conference Registration/Reception at the conference
location. The registration desk opens, for the tutorial session, at
9:00 AM on Sunday and at 9:00 AM on Monday for the conference.

The Future Directions session ends at 17:00 PM Tuesday.


Program Chair: Michel Cosnard (LIP, ENS Lyon) (+33) 7272 8080 (fax)
Renzo Di Antonio (IBM ECSEC) (+39) 6.5966.5548 (fax)
Jack Dongarra (University of Tennessee and
Oak Ridge National Lab.) (615) 974-8296 (fax)
Giovanni Aloisio (Universita' di Lecce)
Organization Chair: Giorgio Richelli (IBM ECSEC)
Frederic Desprez (LIP ENS Lyon)
Romano Bizzarri (CASPUR-Universita' di Roma)
Program Committee: Fabrizio Baiardi (Universita di Pisa),
Giovanni Aloisio (Universita' di Lecce),
Adam Beguelin (Carnegie Mellon University),
Serge Chaumette (LABRI, Bordeaux),
Marc Garbey (LAN1-Lyon),
Al Geist (Oak Ridge Nat. Lab.),
Marc Gengler (LITH, EPF Lausanne),
Thomas Ludwig (Technische Universitaet, Muenchen),
Robert Manchek (University of Tennessee),
Pierre Manneback (Universit\'e Polytechnique de Mons),
Vaidy Sunderam (Emory University),
Piero Sguazzero (IBM ECSEC),
Pavel Tvrdik (Faculty of Elec. Eng., CTU),
Stephane Ubeda (Universite de Saint-Etienne).
Organization Comm.:
Giulia Caliari (IBM ECSEC)
Salvatore Filippone (IBM ECSEC)
Stefano Patarnello (IBM ECSEC)
Giorgio Richelli (IBM ECSEC)
Nico Sanna (CASPUR-Universita' di Roma)

Call For Papers
We invite everyone with PVM ideas or experiences to submit abstracts
of papers and posters for possible presentation at the Users' Group meeting.
List of topics includes (but is not limited to):
The PVM system:
Extensions and Improvements
Vendors Implementations
Programming Environments
Numerical Kernels
Scheduling and Load Balancing
Benchmarking and Pseudo-Applications
Real-world Parallel Applications:
Image Processing
Structural Analysis
Authors are requested to submit a 4-pages extended abstract before
September 15, 1994. Abstracts will be reviewed and authors notified of
their acceptance by October 1.
Any special equipment required for the talk should also be indicated
in the abstract.

Abstracts should be submitted in postscript form
by e-mail to


From: Philip Aston <>
Date: Thu, 21 Jul 1994 17:09:32 +0100 (BST)
Subject: Post Doc at Surrey, UK

Postdoctoral Research Fellow
Department of Mathematical
and Computing Sciences
University of Surrey, UK

A postdoctoral research fellow is required to work on the project
`Numerical Investigation of Turbulence in the Complex Ginzburg-Landau
Equation', which is funded by the EPSRC for a period of 3 years and will be
supervised by Dr P. Aston and Dr M. Bartuccelli in the Department of
Mathematical and Computing Sciences, together with Dr P. Voke in the
Department of Mechanical Engineering.

The project involves the development of numerical methods suitable for the
accurate simulation of both hard and soft turbulence in the CGL equation.
The norms of the solutions will then be compared with analytical upper
bounds. The relationship between the hard turbulent solutions of the CGL
equation and the finite time singularities of the Nonlinear Schrodinger
equation in the inviscid limit will also be considered.

Applicants should have, or expect to obtain, a PhD and should have
experience in either numerical analysis or nonlinear dynamical systems
as well as being a competent programmer. Knowledge of Fortan and Unix would
be an advantage. The appointment will on the 1A scale with starting salary
in the range 13941 - 15566 pounds per annum. The anticipated starting date
for the project is October 1994.

Applications in the form of a curriculum vitae (two copies), including the
name and address of two academic referees should be sent to the Personnel
Office (SAB), University of Surrey, Guildford, Surrey GU2 5XH, UK by Friday
2 September quoting reference number 280. Further details can be obtained
from the Personnel Office at the above address or by telephone on 0483-259360.

Informal enquiries may be made to Dr P. Aston (
or Dr M. Bartuccelli (

The University is committed to an Equal Opportunities Policy.


From: John Holt <>
Date: Wed, 20 Jul 94 15:17:02 EST
Subject: Visitors and Post Docs, Univ. of Queensland

Visitors and/or Post Docs

The Centre for Industrial and Applied Mathematics and Parallel Computing
Department of Mathematics
The University of Queensland
Queensland, Australia

CIAMP staff members currently have Australian Research Council funding for
a project entitled "Discrete optimisation algorithms for practical sequencing
and scheduling problems arising in the transportation industry."
The particular work being undertaken concerns algorithms for stochastic
vehicle routing problems and the use of parallel computers for a range of
methods appropriate for the combinatorial optimisation problems which arise in
the scheduling of vehicles and crew. Application areas considered so far
include airline crew scheduling, bus and crew scheduling, locomotive
scheduling and delivery vehicle scheduling.

The Centre is interested in hearing from suitably qualified people who may be
interested in visiting this year or next for periods of at least 3 months to
work on the project or who may be interested in applying for a post doctoral
position for 12 months. Experience with one or more of set partitioning,
Lagrangean relaxation or parallel algorithms for discrete optimisation
problems would be an advantage.

In the case of visitors, some support could be offered for people on leave from
their own universities who wish to work on the project.

For further information, contact:

Dr John Holt
Department of Mathematics
The University of Queensland
Qld, 4072

Telephone: +61 7 365 3265
+61 7 365 2673
Fax: +61 7 365 1477


From: SIAM <>
Date: Tue, 19 Jul 94 13:45:42 EST
Subject: Contents, SIAM Scientific Computing

SIAM Journal on Scientific Computing
Volume 15, Number 6, November 1994

Quasi-Random Sequences and Their Discrepancies
William J. Morokoff and Russel E. Caflisch

A Gradient Random Walk Method for Two-Dimensional Reaction-
Diffusion Equations
Arthur Sherman and Michael Mascagni

Computing Gaussian Likelihoods and Their Derivatives for General
Linear Mixed Models
Russ Wolfinger, Randy Tobias, and John Sall

Thin Plate Splines with Discontinuities and Fast Algorithms for
Their Computation
David Lee and Jyh-Jen Horng Shiau

On the Parallel Implementation of Jacobi and Kogbetliantz
Jurgen Gotze

Efficient Variants of the Vertex Space Domain Decomposition
Tony F. Chan, Tarek P. Mathew, and Jian-Ping Shao

Solution of the Systems Associated with Invariant Tori
Approximation II: Multigrid Methods
Luca Dieci and Georg Bader

Performance of Several Optimization Methods on Robot Trajectory
Planning Problems
Joseph G. Ecker, Michael Kupferschmid, and Samuel P. Marin

An Efficient Block-Oriented Approach to Parallel Sparse Cholesky
Edward Rothberg and Anoop Gupta

A Two-Phase Algorithm for the Chebyshev Solution of Complex Linear
Dirk P. Laurie and Lucas M. Venter

Preconditioning for Domain Decomposition through Function
Mo Mu and John R. Rice

Using Krylov Methods in the Solution of Large-Scale Differential-
Algebraic Systems
Peter N. Brown, Alan C. Hindmarsh, and Linda R. Petzold

Efficient Spectral-Galerkin Method I. Direct Solvers of Second- and Fourth-Order
Equations Using Legendre Polynomials
Jie Shen


From: Eduardo Sontag <>
Date: Tue, 19 Jul 94 19:57:47 BST
Subject: Contents, Control, Signals and Systems


Tryphon Georgiou,
Differential stability and robust control of nonlinear systems,
pp. 289-306.

Corrado Deconcini and Fabio Fagnani,
Symmetries of differential behaviors and finite group actions on
free modules over a polynomial ring, pp. 307-321.

Daniel E. Miller and Edward J. Davison,
On asymptotic model matching, pp. 322-340.

A. Pastor and V. Hernandez,
Differential periodic Riccati equations: Existence and uniqueness
of nonnegative definite solutions, pp. 341-362.

Yu-Fan Zheng and Li Cao,
On general construction of reduced inverse for controlled systems,
pp. 363-379.

Author Index for Vol 6, p. 380
Subject Index for Vol 6, p. 381


From: Richard Brualdi <>
Date: Wed, 20 Jul 1994 13:03:17 -0500 (CDT)
Subject: Contents, Linear Algebra and its Applications

Contents Volumes 208/209

Preface 1

Man-Duen Choi and Peter Rosenthal (Toronto, Ontario, Canada)
A Survey of Chandler Davis 3

Fuad Kittaneh (Amman, Jordan)
On Some Operator Inequalities 19

Man-Duen Choi (Toronto, Ontario, Canada), Mary Beth Ruskai
(Lowell, Massachusetts), and Eugene Seneta (Sydney, Australia)
Equivalence of Certain Entropy Contraction Coefficients 29

Kenneth R. Davidson and Marc S. Ordower
(Waterloo, Ontario, Canada)
Some Exact Distance Constants 37

V. Olevskii and M. Solomyak (Rehovot, Israel)
An Estimate for Schur Multipliers in Sp-Classes 57

T. Ando (Sapporo, Japan) and F. Hiai (Mito, Ibaraki, Japan)
Inequality Between Powers of Positive Semidefinite Matrices 65

Gerd M. Krause (Bielefeld, Germany)
Bounds for the Variation of Matrix Eigenvalues
and Polynomial Roots 73

Ludwig Elsner (Bielefeld, Germany)
Perturbation Theorems for the Joint Spectrum of
Commuting Matrices: A Conservative Approach 83

Michael Stewart (Urbana, Illinois) and
George Cybenko (Hanover, New Hampshire)
Perfect-Reconstruction Filtering With Unitary
Operators and Projections 97

Stephen Pierce (San Diego, California) and
Leiba Rodman (Williamsburg, Virginia)
Lipschitz Properties of Some Actions of Matrix Groups 135

C. Laurie (Tuscaloosa, Alabama), B. Mathes (Waterville, Maine),
and H. Radjavi (Halifax, Nova Scotia, Canada)
Sums of Idempotents 175

D. Przeworska-Rolewicz (Warszawa, Poland)
Remarks on Commutators With Operators Having Either
Finite Nullity or Finite Deficiency 199

Avraham Feintuch (Beersheva, Israel)
Gap Metric Robustness for Linear Time-Varying Systems 209

Takayuki Furuta (Tokyo, Japan)
A Note on the Arithmetic-Geometric Mean Inequality
for Every Unitarily Invariant Matrix Norm 223

Don Hadwin (Durham, New Hampshire)
An Algebraic Version of the Multiplication Property
of the Fredholm Index 229

Alexander Markus (Beer-Sheva, Israel) and
Vladimir Matsaev (Ramat-Aviv, Israel)
The Failure of Factorization of Positive Matrix Functions
on Noncircular Contours 231

Sujit Kumar Mitra (New Delhi, India)
Separation Theorems 239

Jin-Hsien Wang (Kaohsiung, Taiwan, Republic of China) and
Pei Yuan Wu (Hsinchu, Taiwan, Republic of China)
Difference and Similarity Models of Two Idempotent Operators 257

T. Ando (Sapporo, Japan) and Richard A. Brualdi
(Madison, Wisconsin)
Sign-Central Matrices 283

G. W. Stewart (College Park, Maryland)
Perturbation Theory for Rectangular Matrix Pencils 297

C. C. Paige (Montreal, Quebec, Canada) and
M. Wei (Shanghai, China)
History and Generality of the CS Decomposition 303

Mihaly Bakonyi (Atlanta, Georgia) and
Charles R. Johnson (Williamsburg, Virginia)
Invertible Completions of Partial Operator Matrices:
The Nonsymmetric Case 327

R. McEachin (Fort Wayne, Indiana)
Analyzing Specific Cases of an Operator Inequality 343

Rajendra Bhatia (New Delhi, India)
First and Second Order Perturbation Bounds for the
Operator Absolute Value 367

Ilya Spitkovsky (Williamsburg, Virginia)
Once More on Algebras Generated by Two Projections 377

Khakim D. Ikramov and Vadim N. Chugunov (Moscow, Russia)
On the Teng Inverse Eigenvalue Problem 397

Seppo Hassi and Kenneth Nordstrom (Helsinki, Finland)
On Projections in a Space With an Indefinite Metric 401

M. Omladic (Ljubljana, Slovenia), M. Radjabalipour
(Kerman, Iran), and H. Radjavi (Halifax, Nova Scotia, Canada)
On Semigroups of Matrices With Traces in a Subfield 419

W. O. Amrein (Geneva, Switzerland) and
Kalyan B. Sinha (New Delhi, India)
On Pairs of Projections in a Hilbert Space 425

Karl Gustafson (Boulder, Colorado)
Antieigenvalues 437

S. Friedland (Chicago, Illinois) and M. Katz (Haifa, Israel)
On the Maximal Spectral Radius of Even Tournament
Matrices and the Spectrum of Almost Skew-Symmetric
Compact Operators 455

Ren-Cang Li (Berkeley, California)
On Eigenvalue Variations of Rayleigh Quotient Matrix
Pencils of a Definite Pencil 471

Daniel Alpay (Beer-Sheva, Israel), Joseph A. Ball (Blacksburg,
Virginia), Israel Gohberg (Tel-Aviv, Ramat-Aviv,
Israel), and Leiba Rodman (Williamsburg, Virginia)
The Two-Sided Residue Interpolation in the Stieltjes Class
for Matrix Functions 485

J. A. Dias Da Silva (Lisboa, Portugal), Daniel Hershkowitz
(Haifa, Israel), and Hans Schneider (Madison, Wisconsin)
Sum Decompositions of Symmetric Matrices 523

P. A. Fuhrmann (Beer-Sheva, Israel)
On Skew Primeness of Inner Functions 539

Author Index 553


From: Marilyn Radcliff <>
Date: Fri, 22 Jul 1994 08:31:43 -0400 (EDT)
Subject: Contents, Journal of Approximation Theory

Table of Contents
Journal of Approximation Theory, Volume 78, Number 2, August 1994

Roland Durier. The Fermat-Weber Problem and Inner Product Spaces, 161-173.

T. N. T. Goodman. Interpolatory Hermite Spline Wavelets, 174-189.

Thomas Bagby and Norman Levenberg. Bernstein Theorems for Elliptic
Equations, 190-212.

Xin Li and E. B. Saff. Local Convergence of Lagrange Interpolation
Associated with Equidistant Nodes, 213-225.

D.-W. Buyn and S. Saitoh. Approximation by the Solutions of the Heat
Equation, 226-238.

Mao-Dong Ye and Ding-Xuan Zhou. A Class of Operators by Means of
Three-Diagonal Matrices, 239-259.

Christian Berg. Markov's Theorem Revisited, 260-275.

Radwan Al-Jarrah and Sayel Ali. Interpolation of Entire Functions Associated
with Some Freud Weights, II, 276-285.

Robert B. Gardner and N. K. Govil. On the location of the Zeros of a
Polynomial, 286-292.


Hidefumi Kawasaki. A Second-Order Property of Spline Functions with One
Free Knot, 293.

Marilyn Radcliff
Department of Mathematics radcliff@ohstpy.bitnet
The Ohio State University 1-(614)-292-3317 (office)
231 West Eighteenth Avenue 1-(614)-292-4975 (department)
Columbus, Ohio 43210-1174, U.S.A. 1-(614)-292-1479 (FAX)


End of NA Digest