Send mail to:  mgnet@cs.yale.edu             for the digests or bakeoff
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Current editor:  Craig Douglas douglas-craig@cs.yale.edu
 

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            http://www.tat.physik.uni-tuebingen.de/~mgnet

Today's editor:  Craig Douglas (douglas-craig@cs.yale.edu)

Volume 12, Number 6 (approximately June 30, 2002)

Today's topics:

     Dissertations
     Copper Mountain Virtual Proceedings
         Benzi-Tuma Paper
         Marques-Drummond-       Workshop Slides
     LAA special issue: Large Scale Linear and Nonlinear Eigenvalue Problems
     2nd anouncement European Multigrid Conference
     ICIWIM-2002 at IIT Bombay

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

Date: Tue, 30 Apr 2002 10:20:01 -0400
From: Craig Douglas 
Subject: Dissertations

If you published a dissertation (or one of your students did who is bashful)
that would be of interest to the readers of this newsletter, would you please
consider sending an announcement?  These tend to be among the most downloaded
documents on MGNet and are good publicity to young investigators.  Thanks.

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

Date: Mon, 13 May 2002 09:28:11 -0400 (EDT)
From: Michele Benzi 
Subject: Copper Mountain Virtual Proceedings

A robust preconditioner with low memory requirements
for large sparse least squares problems

Michele Benzi

Department of Mathematics and Computer Science
Emory University
Atlanta, Georgia 30322, USA
(benzi@mathcs.emory.edu)

Mirosla V. Tuma

Institute of Computer Science
Academy of Sciences of the Czech Republic
Pod vodarenskou vez 2
182 07 Prague 8, Czech Republic
(tuma@cs.cas.cz).

Abstract.  We describe a technique for constructing robust preconditioners for
the CGNR method applied to the solution of large and sparse least squares
problems.  Our algorithm computes an incomplete LDLT factorization
of the normal equations matrix without the need to form the normal matrix
itself.  The preconditioner is reliable (pivot breakdowns cannot occur) and
has low intermediate storage requirements.  Numerical experiments illustrating
the performance of the preconditioner are presented.

Key words.  Large sparse least squares problems, preconditioned CGNR, robust
incomplete factorization, incomplete C-orthogonalization

AMS subject classifications.  Primary 65F10, 65F20, 65F25, 65F35, 65F50.
Secondary 15A06.

    Editor's Note: See http://www.mgnet.org/mgnet-cm2002.html#Benzi-Tuma
    -------------

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Date: Mon, 13 May 2002 16:54:33 -0700
From: Osni Marques 
Subject: Copper Mountain Virtual Proceedings

Could you please put our workshop in the virtual proceedings as well.  I am
attaching a pdf version of our presentantion.

       High Performance Numerical Libraries for Science and Engineering

                Osni Marques, Tony Drummond, and Andrew Canning
                    Lawrence Berkeley National Laboratory
                              Berkeley, CA, USA.

This tutorial introduces state-of-the-art numerical tools currently used
worldwide in science and engineering.  Such mathematical tools for addressing
more complex physical and societal phenomena, along with the growth of
computing resources, is driving the continuous growth of the computational
sciences community.  This community includes scientists, designers and
developers of high-end technology who require computerized modeling solutions.
 
We will focus on the use, implementations and applications of these libraries.
Some of these libraries are part of the Department of Energy's Advanced
Computational Testing and Simulation (ACTS) Toolkit while others are part of
the HSL from Rutherford Appleton Laboratory.

    Editor's Note: See http://www.mgnet.org/mgnet-cm2002.html#WS-Monday
    -------------

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Date: Fri, 14 Jun 2002 10:56:33 +0300
From: Andrew Knyazev 
Subject: LAA special issue: Large Scale Linear and Nonlinear Eigenvalue Problems

    LINEAR ALGEBRA AND ITS APPLICATIONS

      Special issue on Large Scale Linear and Nonlinear Eigenvalue
      Problems.

      CALL FOR PAPERS:

In many different application areas there is an increasing and pressing need
for new theory and numerical techniques for solving very large linear and
nonlinear eigenvalue problems.

Recent advances in computer hardware make it feasible to solve enormously
large eigenvalue problems with millions of unknowns, but this increase in the
problem size leads to several new numerical challenges.  First, classical
eigenvalue solvers that do not scale linearly with the problem size have
become very expensive for practical problems.  This has increased attention to
alternative approaches such as preconditioning for eigenvalue problems.
Secondly, due to the architecture of modern computers, there is a demand for
parallel algorithms that are well scalable with respect to the number of
computing nodes.  Moreover the growth of the problem size often leads to badly
conditioned problems, which require increased algorithm stability and novel
tools to estimate the accuracy of computed eigenvalues and eigenvectors.  In
some large-scale applications, one needs to find eigenpairs of a matrix that
is available only implicitly through a function that computes the
corresponding vector-matrix product for a given vector, which thus calls for
"matrix-free" eigensolvers.

This special issue will be open for all papers with significant new results in
Large Scale Linear and Nonlinear Eigenvalue Problems where either linear
algebraic methods play an important role or new tools and problems of linear
algebraic nature are presented.  In addition, surveys papers are very welcome,
in particular on specific application areas where the eigenvalue problems are
especially challenging because of the large size.

Papers must meet the publication standards of Linear Algebra and Its
Applications and will be refereed in the usual way.

The deadline for submission of papers is March 31, 2003, and the special issue
is expected to be published in 2004.  Papers should be sent to any of its
special editors, preferably by email in the PostScript format:

Zhaojun Bai
Dept. of Computer Science
University of California
One Shields Avenue
Davis, CA 95616
USA
bai@cs.ucdavis.edu
Phone: +1-530-752-4874
Fax: +1-530-752-4767

Andrew Knyazev
Department of Mathematics
University of Colorado at Denver
P.O. Box 173364, Campus Box 170
Denver, CO 80217-3364.
USA
andrew.knyazev@cudenver.edu
Phone: +1-303-556-8442
Fax: +1-303-556-8550

Henk A. Van der Vorst
Mathematical Institute
Utrecht University
Mailbox 80.010
3508 TA UTRECHT
The Netherlands
vorst@math.uu.nl
Phone: +31-30-2533732
Fax: +31-30-2518394

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

Date: Wed, 22 May 2002 14:33:48 +0200
From: Jochen Hittler 
Subject: 2nd anouncement European Multigrid Conference

Seventh European  MultiGrid Conference

Hohenwart Forum, Germany
October 7th - 10th, 2002

The Research Network WiR Baden-Wurttemberg,  together with the
Simulation in Technology Center at the University of Heidelberg are
organizing the European Multigrid Conference in 2002. Earlier European
Multigrid Confrences were held in Cologne in 1981 and 1985, Bonn in
1990, Amsterdam in 1993, Stuttgart in 1996 and Gent in 1999. The
conference provides a forum for the presentation and discussion of
recent research in the general area of multigrid methods.

Chairmen
W. Hackbusch, Kiel
G. Wittum, Heidelberg

Invited Speakers (tentative)

R.E. Bank, San Diego; A. Brandt, Rehovot; R. Falgout, Livermore; R.
Hiptmair, Tubingen;  S. Lang, Heidelberg; K. Oosterlee, Delft;  S.
Sauter, Zurich; V. Schulz, Trier; R. Stevenson, Utrecht; J. Xu, Penn
State; W. Zulehner, Linz.

Conference topics
Multigrid methods, focussing on robustness, adaptivity, algebraic
multigrid, wavelets, parallel methods, optimization and inverse
modelling, software and tools.Applications of multigrid, particulary in
computational fluid dynamics, porous media flow, computational
mechanics, chemical engineering, biotechnology and statistical physics.

Proceedings

Invited lectures and a number of selected presentations will appear as
full papers in Computing and  Visualisation in Science.

Abstracts

Please submit your abstract by
May 31st.
Notice of acceptance will be given by July 15th . Your abstract should
not be longer than 30 lines in 12 pt, including tables and pictures.
Please send it in pdf-format to emg02@iwr.uni-heidelberg.de

Registration Office

Jochen Hittler      phone: ++49 (0) 6221 54 88 15
Oktavia Klassen    phone: ++49 (0) 6221 54 88 54
Simulation in Technology Center
Universitat Heidelberg
Im Neuenheimer Feld 368
D- 69120 Heidelberg
fax:       ++49 (0) 6221 54 88 60
email:  emg02@iwr.uni-heidelberg.de
http://www.wir-bawue.de

Registration

The conference fee includes lodging and full board during the
conference, admission to all lectures,  a collection of abstracts and
the conference dinner.The conference fee for registration not later
than  August 1st is
Participiants                            500,- Euros
Students, accomp. persons                300,- Euros
For registration later than August 1st we charge an additional fee of
100,- Euros per person. Limited resources for financial support are
available on request.

Social Programme

Jewellery Museum in Pforzheim, Oct  8     10,- Euros
Maulbronn Abbey , Oct 9                   20,- Euros
Trip to Heidelberg, Oct 11               130,- Euros

Proceedings
Proceedings Volume                        50,- Euros

Payments are to be made in Euro by bank transfer:
"EMG STZ Technische Simulation"
Deutsche Bank, Heidelberg
Bank code     672 700 03
Account no    0153 114

Conference Location
Hohenwart Forum Conference Center
Schönbornstr. 25
75181  Pforzheim - Hohenwart
phone   ++49 (0) 7234 606 0
fax     ++49 (0) 7234 606 46
The conference center is located in Hohenwart, a nice little place in the
Northern Black Forest.  Nearby airports are Frankfurt/M.  (150 km) and
Stuttgart (50 km), the closest train station is Pforzheim.  It is possible to
reach Hohenwart from Pforzheim by taxi or bus (20 min).

Best regards

Jochen Hittler
WiR Bawue

    Editor's Note: Their bank is already taking transfers.
    -------------

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Date: Thu, 30 May 2002 21:17:40 +0530 (IST)
From: "Prof. A.K.Pani" 
Subject: ICIWIM-2002 at IIT Bombay

                 INTERNATIONAL CONFERENCE & INSTRUCTIONAL WORKSHOP 
                              ON  INDUSTRIAL MATHEMATICS

                                   (ICIWIM-2002)

As a part of year long activity in the Department of Mathematics, it 
is proposed to organize a three day International Conference on  
``Industrial Mathematics'' at IIT Bombay during December 7-9, 2002. This 
conference will be preceded by a 5 day  Instructional  Workshop 
- December 2-6, 2002, on the same topic.


The main focus of the conference will be on recent advances in solution 
strategies employed for solving real life problems. The thrust areas  
will be 

* Modeling & Simulation        * Scientific Computing 
* Control & Optimization       * Industrial Statistics 
* Financial Mathematics 

The  Instructional Workshop will emphasize on case studies 
pertaining to the above mentioned areas in a  Computer Aided Instructional 
Environment. Hands-on experience through tutorial sessions will be an 
essential feature.  


International Organizing Committee: 
Mohan C. Joshi, IITB (India); Helmut Neunzert, Chair, Institute for 
Industrial Mathematics, Kaiserslautern (Germany); John R. Ockendon, Oxford 
University (UK); Robert S. Anderssen, CMA (ANU) and CSIRO, Canberra 
(Australia); Heinz W. Engl, Industrial Mathematics Institute, 
Johannes-Kepler University, Linz (Austria); Vincenzo Capasso, MIRIAM, 
University of  Milano (Italy); Ivo Babuska, University of Texas (USA); 
Mary F. Wheeler, University of Texas (USA);
A V Balakrishnan, UCLA (USA); Richard E. Ewing, ISC, Texas A \& M (USA); 
E van Groesen, University of Twente (Netherlands); 
P. N. Shiv Kumar, University of Manitoba (Canada); Gautam Mitra, 
Brunel University (UK); John R. Whiteman, Brunel University (UK);
and Edy Soewono, ITB, Bandung (Indonesia).


National Organizing  Committee.
Mohan C. Joshi, Chair (IITB); Amiya K. Pani, Co-ordinator (IITB);
Sanjeev Sabnis, Co-ordinator (IITB);
Ranjan K. Malick (IITB); Kannan M. Moudgalya (IITB); Sachin B. Patkar 
(IITB); Alladi Subramanyam (IITB);Suresh Kumar (IITB); P. R. Parthasarthy 
(IITM, Chennai); V. D. Pathak (MSU, Baroda);  S. Purohit (CDAC, Pune).


Registration Fee.
Conference:
Before October 15, 2002: \$150/- (Foreign participants), Rs. 1,000/- 
(Indian participants)
After October 15, 2002: \$200/- (Foreign participants), Rs. 2,000/- 
(Indian participants).

Conference & Workshop:
Before October 15, 2002: \$200/- (Foreign participants), Rs. 2,000/- 
(Indian participants).
After October 15, 2002: \$250/- (Foreign participants), Rs. 2,500/- 
(Indian participants).

Online Registration. Visit web page 
http://www.math.iitb.ac.in/~iciwim

Submission of Abstract.} Deadline -October 15, 2002.

The conference proceedings will be published.


Contact Person.

Professor Amiya K Pani
Co-ordinator, ICIWIM-2002
Department of Mathematics
IIT Bombay, Powai
Mumbai-400076 (India).

Phone: 91-22-576 7451 (Office)
       91-22-576 8481 (Residence) 
Fax: 91-22-576 3480 
Email : 
iciwim@math.iitb.ac.in, 

Home page: 
http://www.math.iitb.ac.in/~iciwim 

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

End of MGNet Digest
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