NA Digest Monday, December 27, 1993 Volume 93 : Issue 48

Today's Editor:

Cleve Moler
The MathWorks, Inc.

Submissions for NA Digest:

Mail to

Information about NA-NET:

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From: David G. Hough <>
Date: Mon, 20 Dec 93 21:19:21 PST
Subject: Freely Distributable LIBM

Dr. K-C Ng has developed a new version of libm that is the basis for
the bundled /usr/lib/ in Solaris 2.3 for SPARC and for future
Solaris 2 releases for x86 and PowerPC. It provides the standard
functions necessary to pass the usual test suites.
This new libm can be configured to handle exceptions in accordance with
various language standards or in the spirit of IEEE 754.
The C source code should be portable to any IEEE 754 system with minimal

fdlibm contains no additional functions
beyond those required by various standards;
the additional functions that used to be part of Sun libm
will be distributed in a new library libsunmath.a that will
be shipped with the unbundled SunPro compilers.

In the interest of elevating the minimum acceptable level of quality in
math libraries, SunPro has decided to make K-C's work freely distributable
subject only to the restriction that its origin be acknowledged:

/* @(#)fdlibm.h 5.1 93/09/24 */
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================

How to get fdlibm by email - as three email messages of 100KB each:

send all from fdlibm

How to get fdlibm by ftp:

get fdlibm.tar

Remember that anything free comes with no guarantee. But
you may send comments and bug reports to:


From: J. M. SANZ-SERNA <>
Date: Tue, 21 Dec 1993 08:48:34 +0000 (UTC +0100)+0100
Subject: New book, Numerical Hamiltonian Problems

and M.P. Calvo is now available. It is published by Chapman
and Hall, London and has xii+207 pages.

The purpose of the book is to present a unified introduction
to the interdisciplinary and growing field of symplectic
integration of Hamiltonian problems.. It includes five
preliminary chapters on Hamiltonian problems and numerical
methods, so that little background knowledge should be
required. Numerical examples are provided throughout.


From: Karen Morgan <70530.1227@CompuServe.COM>
Date: 20 Dec 93 12:12:07 EST
Subject: Medicine Meets Virtual Reality

January 27-30, 1994, San Diego Marriott Hotel & Marina
Sponsored by UCSD, 23 hours Category 1 CME credit, $390 until December 31, $450
after, call 619/751-8841, fax 751-8842, or E-mail 70530, for

THURSDAY, January 27, three workshops offered simultaneously:
I. BIOLOGICAL INFORMATICS, Hans B. Sieburg, Ph.D., Chair, Participants:
Sheldon Ball, Floyd Bloom, Michael Huerta, Ralph Martinez, Jack Park, Stella
Veretnik, W. Ziarko

Makoto Nonaka, M.D., Ph.D., Chair, Participants: Adrian King, Patrick Chang,
Michael Gribskov, Russ Altman, Tom Brotherton

Dave Warner, Chair

FRIDAY, January 28

TECHNOLOGY ASSESSMENT: Who Will Pay and Why? Diane S. Millman, J.D., Paul
Radensky, M.D., J.D., John E. Abele, Steven T. Charles, M.D., Mark Wiederhold,
M.D., Ph.D., Faina Shtern, M.D., Melvyn Greberman, M.D., MPH

DATA FUSION: More Than the Sum of the Parts. Don Stredney, Hans B. Sieburg,
Ph.D., Mark Wiederhold, M.D., Ph.D.

APPLICATIONS: New Visions for New Technologies. Col. Richard M. Satava, M.D.,
Joseph M. Rosen, M.D., Harvey Eisenberg, M.D., Michael D. Doyle, Ph.D., Walter
J. Greenleaf, Ph.D., John P. Brennan, M.D., Kenneth Kaplan, Beth A. Marcus,
Ph.D., Suzanne Weghorst, Christopher C. Gallen, M.D., Ph.D.

SURGERY: Images of the New Paradigm. Glenn M. Preminger, M.D., John Flynn,
Adrie C.M. Dumay, Ph.D., David Hon, Jonathan R. Merril, M.D., Zoltan Szabo,
Ph.D., Michael Truppe, M.D., Patrick J. Kelly, M.D., Robert B. Lufkin, M.D.,
Leon Kaufman, Ph.D., Karun Shimoga, Ph.D., William E. Lorensen, Volker Urban,
M.D., P. Mayer, N. M. Huewel, M.D.

SATURDAY, January 29

EDUCATION AND TRAINING: The Best and Highest Use. J.K. Udupa, Ph.D., Richard
A. Robb, Ph.D., Jonathan Prince, D.D.S., Helene M. Hoffman, Ph.D., Michael J.
Ackerman, Ph.D.

INTERFACE: Speaking the Same Language. Nathaniel I. Durlach, Dave Warner, Col.
Richard M. Satava, M.D., Myron Krueger, Ph.D., Walter J. Greenleaf, Ph.D., Paul
Cutt, Narender P. Reddy, Ph.D., Scott Hassan, Alan Barnum-Scrivener, John
Peifer, M.A.

TELEROBOTICS: Reach Out and Touch Something. Ian Hunter, Ph.D., Paul S.
Schenker, Ph.D., Elmar H. Holler, Steven T. Charles, M.D., Bela L. Musits, Hugh
Lusted, Ph.D., Janez Funda, Ph.D., Yulun Wang, Ph.D.

Gabriele Faulkner, Ph.D., Uwe G. Kuehnapfel, Ph.D., Matthias Wapler, R. Bowen
Loftin, Ph.D., Jaren Parikh, Kurt R. Smith, D.Sc., Bruce Kall, M.S., Donald W.
Kormos, Ph.D., David W. Cloyd, M.D., Penny Jennett, Ph.D., Lauren Gabelman,
M.S., Joshua Lateiner, Anthony M. DiGioia III, M.D., Joseph B. Petelin, M.D.,
Timothy Poston, Erik Viirre, M.D., Ph.D., Mark Bolas, A. David Johnson, Ph.D.,
Brian D. Athey, Ph.D.

SUNDAY, January 30

TELEMEDICINE: The Global Health Community. Dave Warner, Michael F. Burrow, Jay
H. Sanders, M.D., Ralph Martinez, Ph.D., William J. Dallas, Ph.D., John D.
Hestenes, Ph.D., Rudy Mattheus, M.Sc., Georges J.E. De Moor, M.D., Jens P.
Christensen, M.SE., MBA

SUMMARY DISCUSSION: Improving Quality, Continuity, and Access to Healthcare
While Reducing Cost. Faina Shtern, M.D., Col. Richard M. Satava, M.D., Makoto
Nonaka, M.D., Ph.D., Nathaniel I. Durlach, John D. Hestenes, Ph.D., Rudy
Mattheus, M.Sc., Melvyn Greberman, M.D., MPH

EXHIBITS: Advanced Visual Systems, Inc., Artma Biomedical, Inc., BioControl
Systems, Inc., Computer Motion, Inc., Dimension Technologies, Inc., Engineering
Animation, Inc., XTensory, Inc., High Techsplanations, Inc., Image Technology
Associates, Inc., Immersion Corp., IVI Publishing, IXION, Kaiser Medical Optics,
Inc., Shooting Star Technology, Silicon Graphics, Inc., SONY Medical Systems,
Inc., Stealth Technologies, Inc., Pixys, Inc., Virtual Vision


From: Hans Hinterberger <>
Date: Tue, 21 Dec 93 08:27:49 +0100
Subject: Scientific and Statistical Database Management

Call for Papers VII SSDBM

Seventh International Working Conference on
Scientific and Statistical Database Management
Charlottesville, Virginia U.S.A. September 28-30, 1994

The Conference

This international conference provides a forum for the presentation and
exchange of current work in the field of scientific and statistical data-
base management. We are particularly soliciting papers on new concepts,
novel ideas, and state-of-the-art research results relevant to database
and knowledge base design from a theoretical as well as applicative
point of view. To encourage the dialog between practitioners and researchers
we invite contributions also from domain-scientists, reporting experience
in data management from their field. Topics of interest include but are not
limited to: modeling and semantics, query languages and user interfaces,
physical organization, security, scientific databases, data analysis and
visualization, management of temporal and spatial data, knowledge discovery,
uncertainty, evaluation of scientific, engineering, statistical applications.

Submission of Papers and further information

Authors are requested to submit five copies of the complete paper, not
exceeding 20 pages, as follows.

Contributions from the European and Asian continents to:

Hans Hinterberger, European Co-Chairman.
Institute for Scientific Computing
ETH Zentrum
CH-8092 Zurich, Switzerland

All other contributions to:

James C. French, General Chairman.
c/o Sandra Sullivan
Thornton Hall, University of Virginia
Charlottesville, VA 22901 USA

Important Dates

March 1, 1994 Deadline for submission of papers.
May 24, 1994 Notification of acceptance.
July 12, 1994 Camera-ready copies of papers due.


From: D. F. Griffiths <>
Date: Wed, 22 Dec 93 09:31:27 GMT
Subject: 16th Dundee NA Conference, 1995

16th Dundee Conference on Numerical Analysis
26 -30 June, 1995

The dates of the next Dundee NA Conference are as shown. The list of
invited speakers will be broadcast once it is finalised. Enquiries
should be directed to me.

David F Griffiths Tel: Direct +44 (382) 344467
Dept of Maths & Computer Science Tel: Dept Office +44 (382) 344471
The University FAX: +44 (382) 201604
Dundee DD1 4HN email:
Scotland, UK


From: Taketomo Mitsui <>
Date: Sat, 25 Dec 93 12:18:52 +0900 (JST)
Subject: Group Theoretical Methods in Physics

XXth International Colloquium
Group Theoretical Methods in Physics
July 4 - 9, 1994
Senri Life Center, Toyonaka, Osaka, Japan

The Colloquium, financially supported by Yamada Science Foundation
and held as one of the Yamada Conferences, targets topics:
Symmetry and foundations in classical and quantum mechanics;
Geometry, topology and quantum field theory;
Quantum groups and infinite-dimensional Lie algebras;
Algebraic approach to nuclear structure;
Integrable statistical systems and theory of critical phenomena;
Atomic and molecular physics, condensed matter physics;
Other applications of group theory to physics.

Contact address:
ICGTMP Secretariat
Research Institute for Mathematical Sciences
Kyoto University, Kyoto 606-01, Japan
Fax: +81-75-753-7272


Date: Sat, 25 Dec 93 12:19:27 +0900 (JST)
From: Taketomo Mitsui <>
Subject: Asian-Pacific Operational Research Societies

A P O R S '94
The Third Conference
the Association of Asian-Pacific Operational Research Societies
July 26-29, 1994
Fukuoka Recent Hotel, Fukuoka, Japan

The theme of this conference is Development in Diversity and Harmony.
The topics will cover theory and applications of operations research
and management science, such as:
OR in management and manufacturing;
OR in public sectors; applied probability and statistics;
mathematical programming and optimization;
use of computer for OR.

Those who are interested in should contact

Japan Operations Research Society
Fax: +81-3-3815-3352


YONEDA Kiyoshi
SY4, Research Institute of System & Software Production Technology
Toshiba Co. Ltd.
Yanagi-machi 70, Saiwai-ku
Kawasaki 210, Japan
Fax: +81-44-533-3593


Date: Sat, 25 Dec 93 12:19:52 +0900 (JST)
From: Taketomo Mitsui <>
Subject: Simulation for Manufacturing and Communications

August 1-2, 1994
Waseda University, Tokyo, JAPAN

SIG on System Simulation, The Operations Research Society of Japan
Waseda University, Japan
National Institute of Standards and Technology, USA
National Science Foundation, USA


This conference provides clear presentations of new directions and
results in discrete-event simulation by bringing together world-wide
experts. This is the first international conference in Asia devoted
to discrete-event simulation.


Encompasses all aspects of DISCRETE-EVENT simulation, including
combined discrete-continuous simulation.


Sessions will be organized into three tracks: methodology,
applications, and tutorials. Topic areas include, but not limited to:
modeling and analysis methodologies; manufacturing, communication,
computer and other applications; state-of-the-art reviews and
tutorials; software demonstrations.


December 31, 1993 Submission of abstracts
February 1, 1994 Notification of paper acceptance
April 1, 1994 Early registration
April 29, 1994 Submission of camera-ready manuscripts

Professor MORITO Susumu
Department of Industrial Engineering and Management
Waseda University
3-4-1 Okubo, Shinjuku-ku, Tokyo, 169 JAPAN
Fax: +81-3-3200-2567 (Specify Prof. Morito, IE Dept.)
Tel: +81-3-3203-4141 ext. 73-3452


The tentative list of speakers now includes, among others:
LAW Averill Simulation Modeling & Analysis Corp.; U. Arizona
SCHMEISER Bruce Purdue U.
STECKE Kathryn U. Michigan
SMITH Alan U. California, Berkeley
UNGER Brian Jade Simulations Int'l Corp.; U. Calgary
BOSCH Maximo U. Chile
LEE Young-Hae Hanyang U.
SONG Whey-Ming Tsing Hua U.


From: J. F. Lemaire <>
Date: Tue, 21 Dec 1993 15:56:11 010
Subject: Position at Belgian Institute for Space Aeronomy

Brussels, Belgium

A candidate is sought to carry out software development and data
processing of Earth satellite measurements
(fluxes of energetic ions trapped in the geomagnetic field).
The appointment starts 1st June 1994 and will last 12 months,
at least. The applicant should have a Ph.D. or equivalent
degree in physics, mathematics, engineer.
The following will comprise a complete application :
(1) A statement from the applicant regarding his interest in the position;
(2) a Curriculum Vitae;
(3) a list of publications;
(4) address, phone, and fax numbers of the candidate,
and of 3 scientists familiar with the work of the applicant;
(5) a transcript of graduate school grades;
(6) an abstract of the Ph.D. thesis.
Applications should be sent to
IASB-BIRA, 3 ave Circulaire, B-1180 Brussels,
Belgium (FAX 32-2-374 84 23).
Questions about the position can be directed to
Prof. J.F.Lemaire at 32-2-373 04 07 (off.) or
32-2-374 81-21 (central) or
by E-mail :


From: Frances Abel <>
Date: Tue, 21 Dec 93 15:56:01 -0800
Subject: Positions at RIACS


NASA Ames Research Center
Moffett Field, California

The Research Institute for Advanced Computer Science (RIACS) at the NASA
Ames Research Center, located in the San Francisco Bay area adjacent to
Silicon Valley, is inviting applications for visiting research positions
for visiting faculty, graduate students and advanced undergraduates for
the summer of '94 and for post-doctoral appointments of up to two years
beginning in the fall of '94. We are also inviting application for
sabbatical visits of University faculty during the academic year 94-95.
Summer student visitors must be U.S. Citizens or permanent residents.

RIACS carries out a basic research program in the computational sciences
to support the needs of NASA Ames scientific missions. Specific areas of
interest are: algorithms and software for parallel scientific computation
with applications to computational fluid dynamics, adaptive and composite
mesh methods for solving partial differential equations, the design and
implementation of compilers and tools for parallel computers, and the
analysis of high performance networks.

The computing environment at NASA Ames Research Center includes a Connection
Machine (CM-5), an Intel Paragon, a Cray Y-MP and a Cray-2. High performance
graphics workstations are also available. Visitors to RIACS are expected
to collaborate with NASA Ames scientists. Additional opportunities for
collaboration abound with the many local research Universities and

Applicants should send resumes, descriptions of research interests, and
names and addresses of three references to contact. Please return to:

Joseph Oliger, Director
NASA Ames Research Center
Mail Stop T20G-5
Moffett Field, CA 94035-1000

Applications and inquiries may also be made via e-mail to:

RIACS is an Equal Opportunity Employer.


From: Richard Brualdi <>
Date: Thu, 23 Dec 1993 15:35:20 -0600 (CST)
Subject: Contents, Linear Algebra and its Applications

Volume 196
Table of Contents

Stephen J. Kirkland (Regina, Saskatchewan, Canada) and
Bryan L. Shader (Laramie, Wyoming)
Tournament Matrices With Extremal Spectral Properties 1

R. B. Bapat and A. K. Lal (New Delhi, India)
Path Positivity and Infinite Coxeter Groups 19

Richard A. Brualdi (Madison, Wisconsin), Keith L. Chavey
(River Falls, Wisconsin), and Bryan L. Shader (Laramie, Wyoming)
Rectangular L-matrices 37

A. Deif (Giza, Egypt) and J. Rohn (Prague, Czech Republic)
On the Invariance of the Sign Pattern of Matrix Eigenvectors Under
Perturbation 63

Oscar Rojo, Ricardo L. Soto and Hector Rojo (Antofagasta, Chile)
A Decreasing Sequence of Eigenvalue Localization Regions 71

Thomas J. Laffey and Eleanor Meehan (Dublin, Ireland)
Factorization of Polynomials Using Commuting Matrices 85

Wang Xinmin (Beijing, People's Republic of China)
Convergence for a General Form of the GAOR Method and
Its Application to the MSOR Method 105

Ana Fuenzalida (Talca, Chile), Alicia Labra (Santiago, Chile),
andCristian Mallol (Montpellier, Francia)
Orthogonality in WBJ Algebras 125

J. W. van der Woude (Delft, the Netherlands)
Graph Theoretic Methods for the Computation of Disturbance
Decoupling Feedback Matrices for Structured Systems 139

Zhang Xian and Gu Dunhe (Nangjing, People's Republic of China)
A Note on A. Brauer's Theorem 163

D. R. Jensen (Blacksburg, Virginia)
Minimal Properties of Moore-Penrose Inverses 175

Jonq Juang and Mei Tzu Lee (Hsinchu, Taiwan, Republic of China)
Comparison Theorems for the Matrix Riccati Equation 183

Shmuel Friedland (Chicago, Illinois) and Wasin So
(Minneapolis, Minnesota)
On the Product of Matrix Exponentials 193

Joseph A. Ball (Blacksburg, Virginia) and Jeongook Kim
(Kwangju, Korea)
Stability and McMillan Degree for Rational Matrix Interpolants 207

Roberto Costa and Henrique Guzzo Jr. (Sao Paulo, Brazil)
Indecomposable Baric Algebras. II 233

Herve Le Ferrand (Villeneuve d'Ascq, France)
Quelques Inegalites sue les Determinants de Gram d'une Suite
Vectorielle de Krylov Associee a une Matrice Orthogonale de R*gr 243

Ehrhard Behrends (Berlin, Germany)
On Matrix-Closed Families of Subspaces of a Banach Space 253

Aloys Krieg (Aachen, Germany)
Counting Modular Matrices With Specified Maximum Norm 273


End of NA Digest