## NA Digest Monday, October 11, 1999 Volume 99 : Issue 40

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

### Submissions for NA Digest:

Mail to na.digest@na-net.ornl.gov.

Mail to na.help@na-net.ornl.gov.

URL for the World Wide Web: http://www.netlib.org/na-net/na_home.html
-------------------------------------------------------

From: G. W. Stewart <stewart@cs.umd.edu>
Date: Mon, 4 Oct 1999 12:31:07 -0400 (EDT)

I'm giving a talk later this month on rounding error to the
Baltimore-Washington Section of SIAM. I would appreciate any
interesting anecdotes on real-life embarrassments due to rounding
error. I recall (though I don't know the details) stories about an
index on the Canadian stock market drifting off true and something
about a missile in the Iraq war. If you know the details of these or
any other stories, please pass them on to me.

Pete Stewart
stewart@cs.umd.edu

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

From: C. G. Broyden <broyden@CsR.UniBo.IT>
Date: Wed, 06 Oct 1999 15:05:31 +0100
Subject: Origins of Gram-Schmidt and Conjugate-directions

Dear Colleagues,
Two requests: (1) Can anyone give me the original reference for
the Gram-Schmidt method, and (2) Can anyone give me any details of J.
Morris, whose "escalator method" was arguably the first
conjugate-direction method.
Thanks in anticipation, C. G. Broyden

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

From: Garry Tee <tee@math.auckland.ac.nz>
Ken Turkowski <turk@apple.com>
Date: Tue, 5 Oct 1999 16:56:34 +1300
Subject: Re: Difference Between 1x1 Matrices and Scalars

In last week's NA Digest, Ilse Ipsen wrote:

> There can be a difference between 1x1 matrices and scalars.
>
> Consider the matrix product A*B*C where
>
> A = [1 1] B = [1] C=[1]
> [1] [2]
> [3]
>
> The product A*B*C is not defined because B*C is not defined.
> Nevertheless MATLAB 5.3 computes the answer [2]
> [4]
> [6]
>
> presumably because it associates (A*B)*C. In this case A*B
> happens to be a scalar but should be treated as a 1x1 matrix.
>
> Is this something to worry about?

**********

Garry Tee replies:

Yes, it is something to worry about.
A 1x1 matrix D is not just its single scalar element d_{11}, but it
has associated operations which are not identical with those for a scalar.
The scalar has the property that it can form a scalar product with any
vector or matrix, but the 1x1 matrix does not have that property. The
matrix product DE exists iff E has 1 row, and the matrix product FD exists
iff F has 1 column.
When any array is declared in a PASCAL program (& similarly for
other languages), then some relevant information about the structure must
be stored, as well as just the elements of the array. If a parameter in a
PASCAL procedure is specified as being array[1..1,1..1] of real, then the
compiler will properly reject an actual parameter which is a real scalar; &
it will reject every actual parameter with n subscripts, where n = 1 or
n>=3.
Many operations in linear algebra become simpler and clearer if
scalar multiplication is replaced by matrix multiplication. For example,
consider the eigenvalue equation
Av = ve.
If e is regarded not as a scalar, but as a 1x1 matrix, then this eigenvalue
equation generalizes to the case where m eigenvectors are packed together
to form the m columns of matrix v. In that case, e becomes an mxm matrix of
diagonal form, with the m eigenvalues as the diagonal elements.
The reported behaviour of MATLAB 5.3 must be regarded as a bug, to
be corrected.

Garry J. Tee,
Department of Mathematics, University of Auckland, Auckland, New Zealand.

**********

Ken Turkowski replies:

This is a common occurance. A*B is a dot product, resulting in a scalar.

It could be that A and B are vectors (or covectors) on a surface and C is
a vector (or covector) in three space.

However, the expression *should* be formally expressed as (A*B)*C, since
A*B*C can ambiguously be interpreted as A*(B*C), which is undefined.

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

From: Ken Turkowski <turk@apple.com>
Bill Silvert <bill@ecology.bio.dfo.ca
Joe Grcar <sepp@sandia.gov>
C T H Baker <cthbaker@ma.man.ac.uk>
Date: Tue, 5 Oct 1999 08:37:59 -0700
Subject: Re: Is Scientific Computing Part of Computer Science?

In last week's NA Digest, Martin Berzins <martin@scs.leeds.ac.uk> wrote:

> Every 5 years or so in the UK there is a Research Assessment Exercise
> whereby the research of all University departments is examined.
> The definition of Computer Science for the forthcoming exercise makes
> no mention of Scientific Computing. I'd be interested in the reaction
> of the NA-digest community to this.

**********

Ken Turkowski replies:

Similarly, I'm amazed that very few computer scientists know anything
- frequency analysis and filtering (FFT, convolution)
- numerical analysis

Several times annually, I see someone inverting a matrix by computing
cofactors and determinants (accumulating in single-precision!). This sort
of naivete has got to be corrected!

Ken Turkowski
Immersive Imaging Technologist
Apple Computer, Inc.

**********

Bill Silvert replies:

This is an interesting question, but should be broken into two parts --
SHOULD it be a part, and IS it a part. Clearly the needs of scientific
computing are of academic interest, and some computer scientists work in
this area, but many departments overlook it.

The case of FORTRAN illustrates this. FORTRAN is widely used for
scientific computing, but many CS departments refuse to teach it on the
grounds that it is poorly constructed and is not a good subject for
teaching CS. True, but this gap between theory and application has some
pretty negative side effects.

Bill Silvert
Habitat Ecology Section
Bedford Institute of Oceanography,

**********

Joe Grcar replies:

Computer science began as an interdisciplinary subject
once synonymous with scientific computing. Today, the
two have little in common besides the transposed names.

The truth of this is revealed by a cursory inspection of
major computer science journals. There are few if any
articles about scientific computing. Examine, for example,
the annual percent of articles on any numerical subject
in JACM, the flagship journal of the ACM. The numerical
content peaks at over 60% in 1960, and fluctuates well
below 10% since 1980.

The reason is, scientific computing remains inter-
disciplinary. The question it addresses is numerical
calculation. This is important but merely procedural
to the sciences; it is not the goal of their intellectual
pursuit. Moreover, as Steve Smale pointed out in his
SIAM von Neumann lecture, numerical analysts never
discovered a theoretical framework that simultaneously
treats questions of error propagation and algorithmic
complexity. So when computer science became an
established academic subject in the 1960's and 70's,
the intellectual core formed around the logical and
combinatorial theory of algorithms without accommodating
questions of numerical error. The latter can be viewed
as part of the mathematical theory of approximation, so
I would expect numerical analysis to find a place there.

Thus, responding to Martin Berzins' question in NA Digest
(v 99 n 39), "is scientific computing part of computer
to be different, but the facts plainly indicate it is not.

The point that Martin should make to the authorities
is something like this. Scientific computing is an
integral part of industrial design and scientific research.
One can even argue it is an important aid to making
government policy, since scientific computing is used
to predict the future climate and to develop weapons.
But scientific computing done well is an interdisciplinary
undertaking. None of the participating fields can claim
they alone do the whole thing well, or that projects
in the interdisciplinary subject can compete successfully
for a given field's research funds.

So, given that research in scientific computing is important
and that it is not part of any established program, then
how do the authorities propose to support it?

Lacking some answer to this question, I expect the current
Balkanization of scientific computing to continue. The
inevitable outcome of this will be the use of suboptimal
computing methods and the unrealized potential to address
important scientific and engineering problems.

Joe Grcar
sepp@sandia.gov

**********

Christopher Baker replies:

In NA Digest of October 4 (Volume 99 : Issue 39) Martin Berzins asks,
prompted by RAE2001 -- the Research Assessment Exercise in the UK,
whether Scientific Computing is part of Computer Science. The _draft_
documents issued in connection with RAE2001 (including the definition
of the boundaries of the subjects and the criteria and working
practices) have been issued for the purpose of consultation, and this
and similar issues ought to be raised before OCTOBER 15TH with the RAE
team, for communication to panels:
http://www.rae.ac.uk/Pubs/4_99/4_99.htm

As the Chairman of the Applied Mathematics Panel, which includes
_Numerical_ _Analysis_ in its remit, I shall be happy to raise the
question with the Chairman of the Computer Science Panel. The chairs
of panels in the related areas (Mathematics, Science & Engineering)
meet on Tuesday next. Perhaps I can remark that the general issue of
interdisciplinary research (which I think may be related to this
question) is one to which increased priority is being given,
reflecting its importance. See
http://www.niss.ac.uk/education/hefc/rae2001/1_99.html
The draft criteria for the Applied Mathematics Unit may be read at
http://www.ma.man.ac.uk/~rae2001/Criteria-UoA23.html
Reference to interdisciplinary material and material on the borders of
different assessment units is made in this document. The draft
criteria for all units are available from
http://www.rae.ac.uk/Pubs/4_99/byUoA.htm (as WORD docs!).

RAE2001 may be thought to be a rather local concern, affecting only
the UK, but for better or worse (depending on your viewpoint) these
things acquire an international fashionability, governing the funding
of national research. One of the judgements to be made in RAE2001 is
whether research undertaken at an institution in any given area is of
international excellence. In that respect, and as an innovation, the
panels will approach some non-UK experts to ask for comment.

Christopher Baker
Chair of the Panel for UoA23 (Applied Mathematics)

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

From: Jeremy Siek <jsiek@lsc.nd.edu>
Date: Tue, 5 Oct 1999 02:22:50 -0500 (EST)
Subject: New Release of the Matrix Template Library

Major New Release of the Matrix Template Library
Version 2.1.2-14

Newly Supported Compilers:
Microsoft Visual C++ 6.0
Metrowerks CodeWarrior Pro 5.0 (both Mac and x86)

After much blood, sweat, and tears we are happy to announce the port
of MTL to Visual C++ as well as to CodeWarrior. The ports for both
compilers have passed the full MTL test suite (all 354,432 tests). We
have also ironed out many of the smaller issues with the SGI, KCC, and
g++ compilers (including an update for g++ 2.95). The new version

Thanks to Valient Gough we have added lu_solve() and lu_inverse()
routines to make it more convenient to use lu_factor() to solve
systems of equations. Thanks to the rest of you for sending
in bug reports, bug fixes, and suggestions!

We encourage MTL users who have written algorithms, data structures
or utility functions that might be useful to others to send your code
in. It is all about code reuse!

There has been a couple small interface changes that are listed
on the web page under "What's New".

Enjoy!

Jeremy Siek and Andrew Lumsdaine

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

From: Tony Skjellum <tony@Aurora.CS.MsState.EDU>
Date: Fri, 8 Oct 1999 14:33:01 -0500 (CDT)
Subject: Parallel Mathematical Libraries Project

We have released the Parallel Mathematical Libraries Project first public
release (PMLP). This is a joint effort of MSU, Intel, VNIIEF, and LLNL.
It has sparse iterative, direct, sequential and parallel solvers in C++,
with beta C and Fortran interfaces at present. It supports NT systems and
NT clusters (using MPI).

A lot of modern C++ techniques have been applied to making this system
flexible in data structure, and also to exploit opportunities for
performance. This is the first release of the library, and we expect to
continue improving in future.

Please visit the PMLP page at http://www.erc.msstate.edu/labs/hpcl/pmlp

Thanks,
Tony Skjellum

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

From: Jose Castillo <castillo@myth.sdsu.edu>
Date: Mon, 4 Oct 1999 15:15:22 -0700 (PDT)
Subject: PanAmerican Workshop on Applied and Computational Mathematics

The Third PanAmerican Workshop on Applied and Computational Mathematics
(PWACM III) will be held in Chile, December 12-17, 1999. The Workshop will
emphasize applications of mathematics to industry, technology, science and
society. Proposals for mini-workshops, short talks, posters, and short
courses are solicited. See
http://www.sci.sdsu.edu/math_cs/PanAm98.html

Thanks, Jose

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

From: Daniel Hershkowitz <hershkow@techunix.technion.ac.il>
Date: Sat, 9 Oct 1999 23:21:09 +0200 (IST)
Subject: Electronic Journal of Linear Algeba

The International Linear Algebra Society (ILAS) is considering the production
of a hard copy of volumes 1-4 of the Electronic Journal of Linear Algeba (ELA)
(about 320 pages), and we have been working and negotiating with several
printing companies about quality, price, ... . We hope to sell the hard copy
(probably soft cover) to ILAS members, other linear algebraists, interested
mathematicians, and also to libraries. The cost is expected to be $20 with a 20% discount for ILAS members, including surface mail shipping. In order to determine how many copies should be produced, we are conducting an electronic survey. We ask you to e-mail ASAP, but no later than the October 15, to Jim Weaver: jweaver@uwf.edu your response to the question that follows. Your answer does not commit you in any way but please answer as accurately as possible. Our plan is to make hard copies of future volumes of ELA available to those who wish to purchase them. The ILAS Executive thanks you for your help. ___________________________ I WOULD EXPECT TO PURCHASE A HARD COPY OF VOLUMES 1-4 OF ELA FOR$20
($16 for ILAS members) IF IT WERE MADE AVAILABLE: YES________ NO________. REPLY TO jweaver@uwf.edu ------------------------------ From: Bruce A Wade <wade@csd.uwm.edu> Date: Tue, 5 Oct 1999 11:49:02 -0500 (CDT) Subject: IMACS Conference on Scientific Computing and Mathematical Modeling May 25-27, 2000, Milwaukee, Wisconsin Hosted by the University of Wisconsin-Milwaukee Conference Topics: Air and Water Pollution Models Atmospheric Science Computational Fluid Dynamics Domain Decomposition Financial Mathematics Grid Generation Ill-Posed Problems Industrial Mathematics Image Processing Mathematical Biology Mathematical Optimization Multi-grid Methods Parallel Computing Recent Algorithms for solving PDE's and ODE's Stiff Computations CALL FOR PAPERS Please send extended abstracts by January 10, 2000 to: Dr. S.K. Dey Department of Mathematics Eastern Illinois University Charleston, IL 61920 (USA) Selected papers will be published in full in the proceedings and all abstracts (other than those in the proceedings) will be published in the book of abstracts. For more information please visit www.uwm.edu/Dept/CIM/IMACS.html or contact Bruce A. Wade (wade@uwm.edu), David H. Schultz (schultz@uwm.edu) or Suhrit K. Dey (cfskd@eiu.edu) ------------------------------ From: Do Y. Kwak <dykwak@math.kaist.ac.kr> Date: Wed, 06 Oct 1999 13:36:21 +0000 Subject: KSIAM Workshop on Domain Decomposition First International KSIAM Workshop Domain Decomposition Method Seoul National University, Sangsan Hall Oct 29 - 31, 1999 Seoul, Korea We announce 1st International KSIAM Workshop. The KSIAM aims to gather mathematicians and engineers at the same podium, encourage them to find common interests, work together in or near Korean peninsula. Its scope includes all areas of applied mathematics, engineering, economics, management science, medical sciences, etc., which uses mathematics as a tool. The society also seeks to promote interdisplinary collaboration between mathematician and engineers. The topic of this particular Workshop is the Domain Decomposition Methods. DDM has served as a main tool in in scientific computations arising in the fields such as Numerical Analysis, Computational Fluid Dynamics, Mechnical Engineering, etc. The objective of this Workshop is to promote understanding and use of DD for the solution of problems arising in various fields of science and engineering and to promote interaction between researchers. The Workshop will include invited talks by leading experts and contributed talks in the related fields. Invited Speakers: P. Bjorstad(University of Bergen, Norway) O. Widlund, (NYU. USA) D. Keyes, (ODU, USA) Contributed talks : Sangback Ma, (A scalable parrellel preconditioner for large sparse linear system on a message passing system) Jinhee Lee, (Application of Pseudospectral Domain Decomp. Method to Structural Mechanics) Kwang Yeon Kim and Do Y. Kwak, (Mixed Covolume Methods for quasilinear equation) Sea Jang Youn, Hyung-Suk Kang, (Comparison of Heat Loss from a rectangular fin) Haecheon Choi, (Active Turbulence Control using Mathematical Theory) SeokChan Kim Organizing Committee: Ha Jine Kimn (Ajou University) : hjkimn@madang.ajou.ac.kr Do Young Kwak (KAIST) dykwak@math.kaist.ac.kr Yonghoon Kwon (Pohang University of Science and Technology) : kwony@posmath.postech.ac.kr Sang Kwon Chung (Seoul National University) : chung@plaza.snu.ac.kr Sang Geun Hahn(KAIST) sghahn@math.kaist.ac.kr Seung Jo Kim (Seoul National University) : sjkim@gong.snu.ac.kr Registration: Web page http://icms.kaist.ac.kr/~ksiam/public.html E-mail: dykwak@math.kaist.ac.kr E-mail: ksiam@icms.kaist.ac.kr For everything and more call Do Young Kwak(KAIST) tel (042) 869 - 2720, e-mail dykwak@math.kaist.ac.kr Ha Jine Kimn (Ajou Univ.): tel (0331) 219 - 2433, e-mail hjkimn@madang.ajou.ac.kr ------------------------------ From: A. Augusto de Sousa <Augusto.Sousa@inescn.pt> Date: Wed, 06 Oct 1999 10:43:56 +0100 Subject: VECPAR'2000, Vector and Parallel Processing VECPAR'2000 ---- THIRD and LAST ANNOUNCEMENT AND CALL FOR PAPERS SUMMARY OF IMPORTANT INFORMATION Deadline for submission of abstracts: October 29, 1999 Proposals for tutorials due: October 29, 1999 Final papers due: March 31, 2000 Deadline for early registration: April 28, 2000 Secretariat: congress.porto@abreu.pt Organisation: vecpar2000@fe.up.pt VECPAR'2000 web site: http://www.fe.up.pt/vecpar2000/ VECPAR'2000 is a multidisciplinary meeting on vector and parallel processing. This will be the fourth in a series of conferences initiated in 1993, and organised by the Faculty of Engineering of the University of Porto, Portugal. The main objective is to disseminate research results on parallel and distributed computing in many areas of science and engineering. TOPICS OF INTEREST Papers are solicited in all areas of vector, parallel and distributed computing applied to a broad range of research disciplines. Specially welcome are papers on "Applications of Parallel and Distributed Computing in Engineering" - the major theme of VECPAR'2000. The principal topics of VECPAR'2000 include but are not limited to: * Cellular automata * Computational fluid dynamics * Crash and structural analysis * Data warehousing and data mining * Distributed computing and operating systems * Fault tolerant systems * Imaging and graphics * Interconnection networks * Languages and tools * Numerical methods * Parallel and distributed algorithms * Parallel and distributed computing in education * Real-time and embedded systems * Reconfigurable systems INVITED TALKS AND SPEAKERS * Michael Duff (University College London, UK) "Thirty Years of Parallel Image Processing" * Ian Foster (Argonne National Lab. and the Univ. of Chicago, USA) "High Performance Computing on the Internet" * Roger Owen (University of Wales Swansea, UK) "Finite/Discrete Element Analysis of Multi-fracture and Multi-contact Phenomena" * Ugo Piomelli (University of Maryland, USA) "Large-Eddy Simulations of Turbulent Flows, from Desktop to Supercomputer" * Mark Stadtherr (University of Notre Dame, USA) "Parallel Computing Applications in Chemical Process Engineering" * Dietrich Stauffer (Cologne University, Germany) "Cellular Automata: Applications" ABSTRACTS The paper selection for the meeting will be made on the basis of an extended abstract (between 1000 and 2000 words). Extended abstracts should describe the purpose and scope of the work, contribution to the state-of-the-art, methods used, essential results already obtained, results to be included in the final version of the paper, conclusions and supporting figures and references where appropriate. Detailed instructions for abstract submissions can be found in the conference Web pages: http://www.fe.up.pt/vecpar2000/ Submissions should be sent until October 29, 1999. MORE INFORMATION For more information, please consult the conference Web pages, using the URL address http://www.fe.up.pt/vecpar2000/ contact the meeting secretariat or the organising committee at vecpar2000@fe.up.pt ------------------------------ From: Mary Pugh <mpugh@math.upenn.edu> Date: Wed, 6 Oct 1999 09:53:23 -0400 (EDT) Subject: Conference at NYU on Nonlinear Analysis Nonlinear Analysis, 2000 May 28 - June 2, 2000 Courant Institute, New York University This conference is dedicated to the state of the art in nonlinear analysis and its applications, with emphasis on partial and ordinary differential equations. Applications will include numerical analysis, optimal control, inverse problems, mathematical physics, dynamical systems, fluid dynamics, mathematical biology, mathematical finance, and other areas of applied mathematics. All talks will be short presentations by promising junior scientists. There will be 60 to 70 presentations during the week. In addition there will be open discussion sessions and small working groups to discuss topics and approaches in more detail. Please see www.cims.nyu.edu/math2k or send Mary Pugh e-mail (mpugh@math.upenn.edu) ------------------------------ From: MaryDell Tholburn <marydell@lanl.gov> Date: Wed, 06 Oct 1999 15:50:55 -0600 Subject: Symposium on Computing in Object-oriented Parallel Environments ISCOPE'99 Call for Posters The Third International Symposium on Computing in Object-oriented Parallel Environments December 7-10, 1999 Crowne Plaza Hotel in Union Square San Francisco, CA, USA http://www.acl.lanl.gov/iscope99/ The third International Symposium on Computing in Object-oriented Parallel Environments (ISCOPE'99) Conference will be held in San Francisco, California, USA, during December 7-10, 1999. ISCOPE is a leading forum where researchers and practitioners of high-performance object-oriented computing can exchange technical ideas and investigate success stories in application deployment. In the ISCOPE'99, a poster session will be held. Authors preferring an informal and interactive presentation of their fresh results or on-going projects may submit a proposal for the poster. The topics include: * Scientific applications * Parallel/Distributed problem solving environments * Parallel/Distributed languages and systems * Compiler technologies and performance issues * High-performance run-time systems * Programming/Debugging/Visualization tools * Class libraries, frameworks, and design patterns * Components, reuse, and portability * Software Engineering issues * Theoretical foundations, formal methods * Multi-agent systems * Reflection and Metaprogramming * High-performance databases and data mining * Financial applications * Real-time applications * Global computing, Internet computing and the Grid * Heterogeneous computing environments * Standards for object interoperability Proposals must be sent to ishikawa@rwcp.or.jp via e-mail, which should include: - Subject: "[ISCOPE99] Poster proposal" must appear in the subject line. - Poster Title - An abstract (less than 300 words) that describes the content of the poster. - Name, address, e-mail, phone, and fax information for the presenter. Deadline for submission: October 22th, 1999. Author Notification : November 1st, 1999. ------------------------------ From: Plamen Yalamov <yalamov@ami.ru.acad.bg> Date: Thu, 7 Oct 1999 10:31:36 +0400 (MEDT) Subject: Conference in Bulgaria on Numerical Analysis and Applications CALL FOR MINISYMPOSIA PROPOSALS SECOND CONFERENCE ON NUMERICAL ANALYSIS AND APPLICATIONS Rousse, Bulgaria June 11-15, 2000 organized by the University of Rousse, Bulgaria in cooperation with SIAM and endorsed by the International Linear Algebra Society This conference follows the meeting held in June 24-28, 1996 at the University of Rousse. There were more than 80 participants from 22 countries around the world. The refereed proceedings of the first meeting were published by Spinger Verlag in the LNCS series. The main tracks of the current conference are: 1. Numerical Linear Algebra. 2. Numerical Methods for Differential Equations. 3. Numerical Modeling. 4. High Performance Scientific Computing. We would like to invite organization of Minisymposia focused on a subtopic pertinent to the conference tracks. Each minisymposium should consist of four or more presentations. To contribute a Minisymposium, please send an abstract and the names of authors and titles of their presentations. Short abstracts of each talk will be very helpful. The deadline for submission of proposals is February 1st, 2000. Please e-mail the materials (PostScript, LaTeX or ASCII) to Plamen Yalamov yalamov@ami.ru.acad.bg Lubin Vulkov vulkov@ami.ru.acad.bg Marcin Paprzycki marcin@orca.st.usm.edu Detailed and regularly updated information can be found at: http://orca.st.usm.edu/marcin/mp/cfp/rousse00/rousse00.html http://unidhp.uni-c.dk/~yalamov/conferences.html in the NA-DIGEST. ------------------------------ From: Jens Burmeister <jb@numerik.uni-kiel.de> Date: Fri, 8 Oct 1999 16:11:11 +0200 (MET DST) Subject: GAMM-Seminar Leipzig on Schroedinger Equations Dear colleagues, I'm very pleased to announce the 16th GAMM-Seminar Leipzig on Numerical Techniques for Schroedinger Equations February 3rd to 5th, 2000. Chairmanship: Wolfgang Hackbusch. Location: Max-Planck-Institute for Mathematics in the Sciences, Leipzig, Germany. The first fifteen GAMM-Seminars were held in 1984, 1986-1999 at the Christian-Albrechts-University to Kiel under the title Annual GAMM-Seminar Kiel. For more information please visit our website http://www.mis.mpg.de/conferences/gamm/ With best regards Jens Burmeister ------------------------------ From: Bo Kagstrom <Bo.Kagstrom@cs.umu.se> Date: Fri, 8 Oct 1999 17:35:42 +0200 (MET DST) Subject: Research Positions at HPC2N, Umea University, Sweden Dear friends, Please, find an announcement for job positions at HPC2N, Umea University that we would like to have announced in the NA-digests. Many thanks in advance. Best regards, Bo Kagstrom High Performance Computing Center North (www.hpc2n.umu.se) HPC2N is a national center for scientific and parallel computing located at Umea university. The activities include education, research and competence development in high-performance computing (HPC), visualization, and VR technology; regional and national services for HPC production runs in scientific and industrial applications; knowledge transfer (new users, new areas); application and user support;etc. The parties of HPC2N are Umea University, Lulea University of Technology, The Swedish Institute of Space Physics in Kiruna, The Swedish University of Agricultural Sciences (SLU) in Umea and Mid-Sweden University. We welcome applications for the following new positions: Advanced Consultants in Scientific and High Performances Computing, Scientific Visualization and VR applications (dnr 3155-1773-99) One or two full time positions at HPC2N. You will actively support and take part in research and development (R&D) projetcs that use Umea University's advanced computer resources for parallel computing, access and processing of data, scientific visualization and VR applications. You should have extensive experience from R&D work in one or several of the areas mentioned in the position. We expect that you have a Masters degree in Computing Science and Engineering or a similar education. A Ph.D. degree and pedagogical experience are considered a merit. Positions for PhD Studies in Scientific and Parallel Computing, (dnr 3155-1774-99) One or two full time positions at the Department of Computing Science. You will conduct PhD studies and research in the development of efficient methods, tools, algorithms and and library software for high-performance parallel computer systems. The post-graduate studies will include basic research as well as application-oriented research. We work in an inter- national environment in close collaboration with well-known universities and research institutes. We expect that you have a Masters degree in Computing Science and Engineering or a similar education. It is a merit to have documented merits and experiences in Scientific, Parallel and High Performance Computing. For further information, please, contact Professor Bo Kagstrom, email: bokg@cs.umu.se. Applications are to be directed and sent to Registrator, Umea University, S-901 87 Umea, Sweden. For the complete announcement, see http://www.umu.se/umu/aktuellt/lediga_tjanster. The CLOSING DATE for application to the positions (dnr 3155-1773-99 and dnr 3155-1774-99) is October 29, 1999. You are most welcome with your application! ------------------------------ From: Roland England <R.England@open.ac.uk> Date: Fri, 08 Oct 1999 16:51:30 +0100 Subject: Position at The Open University CHAIR IN APPLIED MATHEMATICS The Open University invites applications for a Chair in Applied Mathematics - as part of a major commitment to strengthen both research and teaching in Applied Mathematics. You should have an excellent record of research publication and of teaching at a range of levels, academic leadership qualities (proven or potential), and a vision for our curriculum development. You will have an opportunity to build a strong research team: we are making available at least one additional Lectureship and one additional Lectureship/Senior Lectureship, to be filled following your appointment. Your leadership qualities are more important than your precise research area, but we would particularly welcome your application if you work in non-linear dynamics, quantum mechanics or numerical analysis of dynamical systems. You will lead the Department that teaches more Applied Mathematics students than any other UK University, with impressive multi-media resources to ensure that your courses are at the forefront of current teaching and learning technologies. The post is based in Milton Keynes. Confidential informal enquiries may be made of Professor David Brannan (Tel: +44 (0)1908-652892; email: d.a.brannan@open.ac.uk). Further particulars of the post and the application process may be obtained from Ms J Barker (Department of Applied Mathematics, The Open University, Walton Hall, Milton Keynes, Bucks MK7 6AA, UK; Tel: +44 (0)1908-653580; email: j.barker@open.ac.uk). The closing date for applications is 5th November 1999. Shortlisted candidates will be invited to visit the Department in late November/early December, and interviews will be held on 16th December 1999. Disabled applicants whose skills and experience meet the requirements of the job will be interviewed. Please let us know if you need your copy of the further particulars in large print, on computer disk, or on audio-cassette tape. Hearing impaired persons may make enquiries on Milton Keynes (01908) 654901 (Minicom answerphone). Equal Opportunity is University Policy. http://watt.open.ac.uk/personnel/emp/pr.htm Post No 10586 ------------------------------ From: Joyce Aitchison <aitchison@rmcs.cranfield.ac.uk> Date: Tue, 5 Oct 1999 13:56:18 +0100 Subject: Positions at RMCS, Cranfield University Applied Mathematics & Operational Research Group Cranfield University - Royal Military College of Science, Shrivenham. Applications are invited for two posts in the Applied Mathematics and Operational Research Group of Cranfield University at the Royal Military College of Science, Shrivenham. LECTURER in COMPUTATIONAL MATHEMATICS or STATISTICS The appointee will contribute to the teaching of mathematics or statistics to specialist MSc and short course programmes. He/she will also provide service teaching to non-specialist courses and must be prepared to work with a wide range of students. Applicants should have an established record in an appropriate research area or clear research potential. The current research activities of the group include mathematical modelling, numerical methods, scientific computing and applied statistics. Applications are invited from candidates with compatible research interests. The successful candidate will be expected to develop his/her research activities and to supervise postgraduate students. Flexibility and willingness to work with other members of staff and a variety of students are essential. Reference DIS21. TEACHING ASSOCIATE in COMPUTATIONAL MATHEMATICS The Group also wishes to appoint a Teaching Associate to assist with its Computational Mathematics activities. The main duties will be to provide support for the wide range of computer hardware and software which is in use within the group, to assist in the preparation of computer-based teaching material and the running of computer practicals, and to give a limited number of lectures and tutorials. There will be an opportunity to become involved with research projects within the group. The appointment will ideally suit a graduate in a mathematically related discipline with an MSc degree or similar qualification. Experience in scientific programming, preferably in Fortran, C or Matlab, is essential. The successful candidate will be required to work on a variety of projects and so flexibility and willingness to work with different members of staff and groups of students is essential. Reference DIS22. Informal enquiries about both posts may be made to Joyce Aitchison on (01793) 785276 or email J.M.Aitchison@rmcs.cranfield.ac.uk or see our website at http://www.rmcs.cranfield.ac.uk/departments/dois/amorg/ Application forms and further details may be obtained from the Personnel Office, Cranfield University, RMCS Shrivenham, Swindon, SN6 8LA. Tel: (01793) 785758 quoting the appropriate reference. Completed applications should be sent to the Personnel Office before the closing date of 26 November 1999. ------------------------------ From: William Layton <wjl+@pitt.edu> Date: Tue, 5 Oct 1999 09:32:18 -0400 (EDT) Subject: Faculty Position at University of Pittsburgh MELLON CHAIR PROFESSOR The Mathematics Department of the University of Pittsburgh invites applications for an endowed Mellon Chair, to begin with the Fall Term 2000 subject to budgetary approval. Mellon Chairs are intended to be the most prestigious academic appointments at the University of Pittsburgh. Applicants should have outstanding research records and be acknowledged leaders in their fields of expertise. We also seek excellence in teaching so applicants should demonstrate a dedication to teaching and supervising students. The applicant should be committed to taking a leadership role in advancing the research profile and national reputation of the Department. We particularly encourage applications from members of under represented minority groups and women. The University of Pittsburgh is an affirmative action, equal opportunity employer. Send a vita, and the names and addresses of up to five experts who support your application to: Mellon Search Committee Department of Mathematics University of Pittsburgh Pittsburgh, PA 15260 The Search Committee will begin the selection process on January 4, 2000. ------------------------------ From: Ronald Morgan <Ronald_Morgan@baylor.edu> Date: Thu, 07 Oct 1999 14:36:34 -0600 Subject: Faculty Position at Baylor University The Baylor University Department of Mathematics invites applications for a tenure track position, at the assistant professor level, starting August 2000. Excellence in teaching and research/scholarship is essential. A current curriculum vitae, three recent letters of reference, a photocopy of each official transcript, and statements about your philosophy of teaching and of research must be included in the application. Applications will be reviewed beginning Nov. 1, and will be accepted until the position is filled. To ensure full consideration, an application should be completed by Dec. 15, 1999. Baylor is a Baptist university affiliated with the Baptist General Convention of Texas. As an Affirmative Action/Equal Employment Opportunity Employer, Baylor encourages minorities, women, veterans, and persons with disabilities to apply. Send to Mathematics Search Committee, P.O. Box 97328, Waco, TX 76798-7328. Feel free to contact Ron Morgan at morganr@baylor.edu if you have questions. ------------------------------ From: Tim Phillips <tnp@aber.ac.uk> Date: Fri, 08 Oct 1999 15:02:10 +0100 Subject: Lectureships in Mathematics at University of Wales Aberystwyth Lectureships in Mathematics University of Wales Aberystwyth Applications are invited for two lectureships in the Department of Mathematics at the University of Wales, Aberystwyth. The successful candidates will interact with a thriving research group specializing in Computational Rheology. The group has a Grade 5 rating in Applied Mathematics. Its activities involve constitutive models for complex fluids and the numerical prediction of complex flows, feeding off a central experimental programme. Candidates with strong research profiles or potential in any area of modern applied mathematics, analysis, or computation, who are willing to collaborate on challenging problems in the dynamics of complex fluids, are encouraged to apply. One of those appointed will have responsibility for teaching courses in analysis. The posts are available from January 2000, but starting dates can be delayed if necessary. Further particulars and application forms, returnable by 12th November 1999, may be obtained from the Personnel Office, Old College, King Street, Aberystwyth, Ceredigion SY23 3AX (Tel: 01970 621832; fax: 01970 622975; e-mail: lml@aber.ac.uk). Informal enquiries may be made of Professor Russell Davies (Tel: 01970 622755; fax: 01970 622777; e-mail: ard@aber.ac.uk) or Dr Tim Phillips (Tel: 01970 622769; fax: 01970 622777; e-mail: tnp@aber.ac.uk). ------------------------------ From: Georgina Copeland <george@maths.warwick.ac.uk> Date: Tue, 5 Oct 1999 17:04:20 +0100 Subject: Positions at University of Warwick UNIVERSITY OF WARWICK, UK LECTURESHIPS IN MATHEMATICS AND COMPUTER SCIENCE Applications are invited for Lectureships in the Departments of Mathematics and Computer Science. We seek individuals who are committed to teaching and who wish to build strong research programmes. In particular the purpose of these two positions is to strengthen a growing research programme in Applied and Computational Mathematics at Warwick University; both the Mathematics and Computer Science Departments at Warwick were given the highest possible rating in the most recent UK research selectivity exercise. The position in The Mathematics Department is in the area of Applied Analysis. Expertise in applications of fields such as Dynamical Systems, PDEs, Stochastic Processes or Wavelets and Multiresolution Analysis will be particularly welcomed. Preference will be given to qualified candidates knowledgeable in computational aspects of their field. The position in The Computer Science Department is in the area of Scientific Computing. Expertise in the application and analysis of high performance or distributed computing environments to the solution of problems arising in fields such as numerical linear algebra and optimisation, molecular dynamics and image/signal processing will be particularly welcomed. Preference will be given to qualified candidates whose research and teaching interests complement both those of the Computer Science Department and the research group in applied and computational mathematics within the Mathematics Department. It is anticipated that appointments will be made at the Lecturer Grade A scale =A317,236 - =A322,579 pa but there is some flexibility and more experienced candidates should not be discouraged from applying. Further information is available from http://www.maths.warwick.ac.uk and http://www.dcs.warwick.ac.uk enquiries may be made to Professor A. Stuart (e:mail george@maths.warwick.ac.uk) Please quote appropriate reference. 9/2A/99 Applications forms and further particulars can be obtained from the Personnel Office, University of Warwick, Coventry CV4 7AL 02476 523685 e:mail recruit@admin.warwick.ac.uk) or from the web page http://www.warwick.ac.uk/jobs Closing Date: 15th December 1999 UNIVERSITY OF WARWICK, UK LECTURESHIPS IN MATHEMATICS Applications are invited for Lectureships in the Department of Mathematics. We seek individuals who are committed to teaching and who wish to build strong research programmes. Outstanding candidates from any area of the mathematical sciences are invited to apply. For one of the posts preference will be given to candidates in applied analysis and for this expertise in applications of dynamical systems, pdes, stochastic processes or wavelets would be particularly welcomed. The department is also keen to attract candidates in any area of financial mathematics. There are both permanent and 3-year posts available. The latter 3-year Warwick Zeeman Lectureship(s) are intended for recent PhD's of outstanding promise who would like an opportunity to begin their careers at one of the UK top rated departments in an environment that nurtures and encourages both research and teaching. Warwick Zeeman Lecturers will be expected to continue their already promising research programmes, will carry a two course per year teaching load, will act as tutors for approximately 17 students and will be expected to participate fully in the scholarly life of the department. Each appointee will have an academic staff mentor who will actively help in preparing the person for his or her future career by advising on pedagogy and development of teaching and communication skills and in identifying suitable opportunities for permanent posts. It is anticipated that appointments will be made at the Lecturer Grade A scale =A316,655 to =A321,815 pa ) with progression by annual increments to the Lecturer Grade B Scale subject to satisfactory performance. However, there is some flexibility and more experienced candidates should not be discouraged from applying for a permanent post. Please quote appropriate reference: 9/A/99 Further information may be obtained from http://www.maths.warwick.ac.uk and enquiries may be made to Professor David Rand (e:mail: george@maths.warwick.ac.uk). Applications forms and further particulars can be obtained from the Personnel Office, University of Warwick, Coventry CV4 7AL 024 7652 3685 e:mail recruit@admin.warwick.ac.uk) or from the web page http://www.warwick.ac.uk/jobs Closing Date: 15th December 1999 ------------------------------ From: Claudio Canuto <ccanuto@calvino.polito.it> Date: Thu, 07 Oct 1999 13:09:05 +0200 Subject: Pre-Doc Fellowship at the Politecnico di Torino The Department of Mathematics of the Politecnico di Torino (Italy) is willing to support one PhD student enrolled in the local PhD program in Applied Mathematics, with the final goal of preparing a Thesis on a topic related to `Multilevel approximations of partial differential equations'. Since funding comes from the European Union (TMR Project), the law requires the fellowship to be exclusively reserved to non-Italian citizens of the European Union (plus Israel). The fellowship amounts to 1200 Euros per month, plus the coverage of tuition fees. The grant initially covers the first year of Doctorate study, but it can be renewed for the second and third year. There will be the possibility of carrying on a limited teaching activity. Candidates should register in our PhD Program mandatorily before November 2, 1999. Please note that the Italian law requires an Admission Exam to PhD Programs, which will be held in Torino in December 1999. The PhD activity will start on January 2000. I urge all potential candidates to contact me as soon as possible, in order to get any further information on the matter. Thank you for your kind attention. ------------------------------ From: Hans Schneider <hans@math.wisc.edu> Date: Wed, 6 Oct 1999 09:14:58 -0500 (CDT) Subject: Contents, Linear Algebra and Its Applications Journal: Linear Algebra and Its Applications ISSN : 0024-3795 Volume : 297 Issue : 1-3 Date : 20-Oct-1999 pp 1-7 Diagonability of idempotent matrices over noncommunicative rings GUANGTIAN Song pp 9-22 Le theoreme de hua pour les algebres artiniennes simples H Essannouni pp 23-56 Stratification of linear systems. Bifurcation diagrams for families of linear systems I Garcia-Planas pp 57-61 Operators which are remain convergent when multiplied by certain Hermitian operators B Cain pp 63-80 Eigenvalues of tridiagonal pseudo-toeplitz matrices D Kulkarni, SZEKAI Tsui pp 81-85 Extensions d'operateurs auto-adjoints et defaut de reflexivite M'HAMMED Benlarbi Delai pp 87-105 Is every matrix similar to a Toeplitz matrix? SM Mackey, N Mackey pp 107-132 Inverse eigenvalue problem: existence of special mass-damper-spring systems P Nylen pp 133-155 Robust controllability and robust closed-loop stability with static output feedback for a class of uncertain descriptor systems C Lin, JL Wang pp 157-175 Majorization polytopes G Dahl pp 177-182 On the decomposition of a matrix into the sum of stable matrices Y Ito pp 183-191 A note on the equivalence of a class of factorized Broyden families for nonlinear least squares problems H Ogasawara pp 193-202 The distribution of the maximum condition number on great circles through a fixed 2 x 2 real matrix D Lewis pp 203-203 Author index ------------------------------ From: Thomas Hogan <hogan@math.ohio-state.edu> Date: Thu, 7 Oct 1999 13:42:09 -0400 (EDT) Subject: Contents, Journal of Approximation Theory Table of Contents: J. Approx. Theory, Volume 100, Number 1, September 1999 Gilbert Helmberg A corner point Gibbs phenomenon for Fourier series in two dimensions 1--43 M. Alfaro, A. Mart\'inez-Finkelshtein, and M. L. Rezola Asymptotic properties of balanced extremal Sobolev polynomials: coherent case 44--59 Tam\'as Erd\'elyi Notes on inequalities with doubling weights 60--72 Les{\l}aw Skrzypek The uniqueness of norm-one projection in James-type spaces 73--93 Walter Roth Korovkin approximation for weighted set-valued functions 94--112 D. Leviatan and I. A. Shevchuk Some positive results and counterexamples in comonotone approximation, II 113--143 L. De Michele and D. Roux The Gibbs phenomenon for$L_{\rm loc}^1\$ kernels
144--156

I. Bruj and G. Schmieder
Best approximation and saturation on domains bounded by curves of
bounded rotation
157--182

Borislav Bojanov
Markov interlacing property for perfect splines
183--201

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