NA Digest Sunday, December 28, 1997 Volume 97 : Issue 92

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

Submissions for NA Digest:

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Information about NA-NET:

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From: J. W. Lu <>
Date: Fri, 26 Dec 1997 13:06:21 -0600
Subject: Free Boundary Problem

Dear NA Net

Can someone point me out references about how to solve the 2-phase
Stefan problem numerically (especially using method of lines) ? My
problem is to solve the directional solidification of binary alloys in
the presence of a mushy zone. I have tried several schemes but do not
work well.

J. W. Lu


From: Pierre Asselin <>
Date: Tue, 23 Dec 97 23:22:25 GMT
Subject: Re: Who is The Author?

Frank Stenger wrote:

>Does anyone know the author of the following incredible "C" program,
>which, after processing, relates a message appropriate to this season?

>#include <stdio.h>
>char *a;

A certain Ian Phillipps, for the 1988 International Obfuscated C Code
%ontest. There's plenty more at

Pierre Asselin, Westminster, Colorado


From: Hans-Christian Hege <>
Date: Tue, 23 Dec 1997 11:15:09 +0100
Subject: Videos at the International Congress of Mathematicians

VideoMath Festival
at the
International Congress of Mathematicians (ICM'98)
Berlin, Germany, August 18 - 27, 1998


Dear colleague,

The International Congress of Mathematicians 1998 (ICM'98) will host
"VideoMath", a festival of the most outstanding mathematical videos, to
be publicly shown in a fullsized theater at ICM'98 in August 1998 in

VideoMath is part of the "cultural program" at ICM'98, and shall attract
a broad audience: ICM attendees, students, teachers, and the proverbial
man-in-the-street with an inclination towards mathematics. Performances
are open to the public and will take place during the period of the

Entries for VideoMath are solicited from all areas of mathematical
visualization and computer graphics. Submissions should meet the highest
standards of mathematical content, visualization techniques, artistic
design, and technical quality. An international program committee will
select the best contributions for inclusion in the festival show. A
PRIZE of DM 5000 will be awarded to recognize the most outstanding

The deadline for submissions is April 3, 1998.

Please, inform colleagues at your department and motivate visualization
experts to submit videos. A poster with a "Call for Videos" has recently
been sent to many institutions world-wide.

Detailed information about the festival and the submission process is
available at

For inquiries and requests to poster and information material, please,
end an e-mail to

We thank you for your help.


Hans-Christian Hege (ZIB Berlin)
Konrad Polthier (TU Berlin)
VideoMath Organizing Committee


From: Jan Hesthaven <>
Date: Fri, 26 Dec 1997 15:13:28 -0500
Subject: Conference on Spectral and High Order Methods

Second Announcement and Call for Papers
Tel Aviv, Israel
June 22-26, 1998

US AFOSR (UK), Tel Aviv Univ (Israel), NSF (USA), AMIF (EU)
S. Abarbanel, C. Bernardi, C. Canuto, M. Deville, R. Glowinski,
D. Gottlieb, B. Gustafsson, G. Karniadakis, H.O. Kreiss, Y. Maday,
E. Mund, T.J. Oden, C. Schwab, A. Quarteroni, L.R. Scott

S. Abarbanel (Chair), B. Artzi, D. Givoli, E. Turkel

The main objective of ICOSAHOM continues to be to bring together
researchers with interest in the theoretical, applied and computa-
tional aspects of high order and spectral methods for the solution
of partial differential equations. Subjects include, but are not
limited to, spectral methods, high-order finite difference and
finite element methods, h-p finite element methods and wavelet
based methods. Applications include problems appearing in electro-
magnetics, fluid and structural dynamics, efficient solvers and
preconditioners for high order methods and parallel aspects of
spectral and high order methods. It is anticipated that
ICOSAHOM'98 will bring together a broad group of scientists
and engineers with a very varied interest in the theory and
application of spectral and high order methods for the solution
solution of a multitude of problems.

An integral part of ICOSAHOM'98 will be a workshop in honor
of Professor V.S. Ryaben'kii for his many contributions to
numerical analysis during a professional career spanning a
period of 50 years.

The workshop honoring Prof. Ryaben'kii will consist of a number of
talks on the different aspects of numerical methods. Close to 20
leading mathematicians and computational scientists have tentatively
agreed to contribute to the workshop.

ICOSAHOM'98 will take place during the week of June 22-26, 1998
at the Holiday Inn Crowne Plaza in Herzelia, Israel. Herzelia is
a resort, beautifully located next to the Mediterranean, north
of Tel Aviv.

The fee for regular conference participants amounts
to US\$ 180,- while the fee for students is US\$ 100,-

A block of rooms have been reserved at the Holiday Inn Crowne Plaza
at an approximate rate of US\$ 155,- per night for a single room,
including breakfast. Alternatives, all in walking distance from
the conference center, include The Sharon, with rates starting
from US\$ 88,- per night for a single room and a limited number
of rooms at Tadmor Hotel starting at US\$ 58,- per night for single

The accommodation rates are all tentative. Further information
regarding accommodation and registration will follow in early
spring of 1998.

A limited number of young scientists attending the conference
may receive partial support for the travel, accommodation and
conference fee. The Scientific Committee invites applications
for partial support along with the submitted abstract. The
applications should contain a short CV of the applicant along
with a motivation for the requested support. Only contributing
conference attendees will be considered for partial support.

The Scientific Committee invites abstracts to be submitted,
describing the content of 30 min talks. These abstracts should not
be less than a page while not exceeding two pages and should be
submitted either in hard copy to the conference office or by
e-mail in LaTeX-style to the conference e-mail address. The abstract
will undergo a thorough referee-process prior to acceptance and
those accepted for presentation will be collected and given to
conference attendees at the beginning of the conference.

The Scientific Committee also invites organizers to submit suggestions
for topical workshops related to the theme of the conference. These
workshops should consist of segments of 2 hours with contributed
talks. It will be the responsibility of the workshop organizer
to solicit talks for the proposed workshop. The Scientific Committee
asks that organizers submit a brief motivation for the proposed
workshop, along with a tentative list of speakers participating in
the workshop. Partial support for a very limited number of workshop
organizers is available.

March 1, 1998 - Deadline for submission of abstracts
Deadline for workshop proposals
Deadline for application of partial support

Further information and future announcements can be obtained by writing an
e-mail to requesting to be included on the mailing
list of ICOSAHOM 98.


From: Mayer Humi <mhumi@WPI.EDU>
Date: Mon, 22 Dec 1997 16:58:50 -0500 (EST)
Subject: Computer Science Chair Position


Worcester Polytechnic Institute (WPI) invites applications for the
position of head of the Department of Computer Science. The
department is growing rapidly in faculty size, student population, and
research productivity. The department, with 15 full-time tenure-track
faculty, provides undergraduate and graduate education through the
Ph.D.; current enrollment is approximately 400 undergraduate and 100
graduate students.

The department has research strengths in artificial intelligence,
computer networks, computer science education, data/knowledge bases,
distributed systems, graph theory, and visualization. Other faculty
research interests include compilers, computer vision, multimedia
environments, programming languages, and software engineering.
Additional information regarding the department can be found at and the most recent annual report at

The department seeks a highly respected computer scientist with an
established record of success in teaching and scholarship. The
department head will be expected to contribute to enhancing the
reputation of the department, promote the development of the faculty,
support scholarly and educational initiatives, engage in scholarly
activity, and strengthen industrial connections.

WPI is an innovative technological university of engineering, science,
management, and the humanities and arts with an enrollment of 2600
undergraduates and about 1000 full- and part-time graduate students.
The WPI educational philosophy is embodied in the "WPI Plan," a
flexible, exciting, and academically challenging program that
synthesizes classroom experiences in real-world problem-solving

Situated in Worcester, MA, the WPI campus is located in close
proximity to many of the city's major cultural attractions, including
the American Antiquarian Society, the Worcester Art Museum and several
major music performance venues. Worcester, forty miles west of
Boston, offers access to the diverse cultural and recreational
resources of New England, and provides opportunities for urban,
suburban or rural lifestyles.

WPI offers a smoke-free environment. Send cover letter, resume, and
names, addresses, telephone numbers and email addresses of three
references, and salary requirements to Human Resources, Worcester
Polytechnic Institute, 100 Institute Road, Worcester, MA 01609-2280 or
email Applicants will be considered on a
continuing basis beginning January 1, 1998 until the position is
filled. To enrich education through diversity, WPI is an affirmative
action, equal opportunity employer.


From: Ake Bjorck <>
Date: Tue, 23 Dec 1997 08:30:59 +0100 (MET)
Subject: Contents, BIT

CONTENTS BIT Volume 38, No. 1 (March 1998)
ISSN 0006-3835

For information to contributers and about subscriptions see

Eigenvalues of symmetrizable matrices
R. Bhatia, F. Kittaneh, and R.-C. Li, pp. 1--11

Gauss-Runge-Kutta-Nystr\"om methods
C. Burnton and R. Scherer, pp. 12--21

Computing spectral value sets using the subharmonicity of the norm
of rational matrices
E. Gallestey, pp. 22--33

Rank-deficient prewhitening with quotient $SVD$ and $ULV$
P. C. Hansen, pp. 34--43

Analysis of the dynamics of local error control via a piecewise
continuous residual.
D. J. Higham and A. M. Stuart, pp. 44--57

An alternative to the Ritz pairs with the EN subspace method
M. Huhtanen, pp. 58--71

Periodic orbits of delay differential equations under discretization
K. In' t Hout and C. Lubich, pp. 72--91

Runge-Kutta methods on Lie groups
H. Munthe-Kaas, pp. 92--111

Point estimation and some applications to iterative methods
M. Petkovi\'c, \Dj. Herceg, and S. Ili\'c, pp. 112--127

A penalty continuation method for the $\ell_\infty$ solution of
overdetermined linear systems
M. C. Pinar and S. Elhedhli, pp. 128--153

Extensions of block-projections methods with relaxation parameters
to inconsistent and rank-deficient least-squares problems
C. Popa, pp. 154--179

Coloring update methods
Y. Shapira, 180--188

Interval solution of nonlinear equations using linear programming
K. Yamamura, H. Kawata, and A. Tokue, pp. 189--202

Modifying the generalized singular value decomposition with
application in direction-of-arrival finding
H. Zha and Z. Zhang, pp. 203--219


An error propagation in the numerical literature
D. Britz, pp. 220--221


From: Baltzer Science <>
Date: Tue, 23 Dec 1997 14:59:07 +0100
Subject: Contents, Advances in Computational Mathematics

Advances in Computational Mathematics 8 (1997) 1,2

Charles K. Chui, Xianliang Shi and Joachim Stoeckler
Affine frames, quasi-affine frames, and their duals 1-17

C. Dagnino and P. Lamberti
Numerical integration of 2-D integrals based on local bivariate C1
quasi-interpolating splines 19-31

Thilo Penzl
Numerical solution of generalized Lyapunov equations 33-48

Even Mehlum and Christian Tarrou
Invariant smoothness measures for surfaces 49-63

Ben-yu Guo and Yuan-ming Wang
An almost monotone approximation for a nonlinear two-point boundary value
problem 65-96

Tadeusz J. Janik
Parallel implementation of the p-version of the finite element method for
elliptic equations on a shared-memory architecture 97-110

Boris N. Khoromskij and Siegfried Proessdorf
Fast computations with the harmonic Poincare--Steklov operators on nested
refined meshes 111-135


From: Baltzer Science <>
Date: Tue, 23 Dec 1997 14:47:51 +0100
Subject: Contents, Numerical Algorithms

Numerical Algorithms 15 (1997) 3,4

P.R. Graves-Morris
A ``Look-around Lanczos'' algorithm for solving a system of linear equations

A. Benazzouz
Quasilinear sequence transformations 275-285

A. Averbuch, L. Vozovoi and M. Israeli
On a fast direct elliptic solver by a modified Fourier method 287-313

J. Bahi, J.C. Miellou and K. Rhofir
Asynchronous multisplitting methods for nonlinear fixed point problems

Zhong-Zhi Bai
Parallel multisplitting two-stage iterative methods for large sparse systems
of weakly nonlinear equations 347-372

Pierre-Jean Laurent, Marie-Laurence Mazure and Voichita Teodora Maxim
Chebyshev splines and shape parameters 373-383

Claude Brezinski
Book reviews 385-388


End of NA Digest