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

- Software for 3D Diffusion-reaction Equations
- Identifying Non-efficient Vectors
- Addendum to SciTools'96 announcement
- ACM-SIAM Symposium on Discrete Algorithms
- SIAM Conference on Discrete Mathematics
- International Meshing Roundtable
- Julia Robinson Celebration of Women in Math
- Conference of the ILAS
- Workshop on Optimal Control, Dynamic Games and Nonlinear Dynamics
- European Community on Computational Methods in Applied Sciences
- ISSAC'96 Registration Announcement
- Building GUIs for FORTRAN programs with Tcl/Tk
- Report on "State of the Art in Numerical Analysis" Conference
- Positions Available at Apple Computer
- Postdoctoral Position at Rice University
- Postdoctoral Position at Sandia Laboratories, Livermore
- Research Position at Newcastle upon Tyne
- Position at ABB Corporate Research in Switzerland
- Graduate Research Assistantships at Marquette
- Contents, BIT
- Contents, Applications of Mathematics
- Contents, SIAM Discrete Mathematics
- Contents, SIAM Applied Mathematics
- Contents, J. Approximation Theory
- Contents, Reliable Computing

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

From: Regine Model <rmodel@ChbRB.Berlin.PTB.De>

Date: Tue, 09 Apr 1996 12:37:02 EDT

**Subject: Software for 3D Diffusion-reaction Equations**

I am working on an inverse problem of parameter

identification of diffusion equations of the following form

d u(x,t)/ dt = div(D(x)grad(u(x,t)) - m(x)u(x,t) + s(x,t) .

D(x) and m(x) are the unknown parameter functions.

s(x,t) and the flux in normal direction of u on the boundary is known

for different s(x,t), in general a delta-function in space and time.

The iterative inverse procedure is based on the repeated solution of

the forward problem with known parameter functions. I am looking for

a 3D solver for the diffusion equation, commercial or scientific

software possibly with source code. Any suggestions would be appriciated.

Thanks.

Regine Model

Physikalisch-Technische Bundesanstalt

Abbestrasse2-12, D-10587 Berlin

regine.model@ptb.de

fax: (+4930) 3481406

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

From: Indraneel Das <indra@owlnet.rice.edu>

Date: Tue, 9 Apr 1996 13:25:09 -0500 (CDT)

**Subject: Identifying Non-efficient Vectors**

This is a problem of identifying the non-efficient vectors

given a set of potentially efficient/non-dominated vectors.

A typical application for this is multi objective optimization.

Consider a finite set S of vectors in R^m,

S = { v_1, v_2, ... , v_n }

A vector v_k in S is said to be efficient (or non-dominated or

Pareto-minimal) in S iff there does not exist j in {1,2,...,n}

such that

v_j(i) <= v_k(i) , for all i in {1,2,...,m}

[v_j(i) indicates the ith component of v_j]

and

v_j(i) < v_k(i) for some i in {1,2,...,m}

The problem is to weed out the non-efficient vectors from S

computationally. Naively, this can be done in O(mn) comparisons.

Is there a smarter way leading to a better complexity result ?

-- Indraneel Das

Department of Computational and Applied Mathematics

Rice University

Houston, TX 77251 -1892

Ph. (713) 527 8101 x3810 e-mail: indra@rice.edu

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

From: Are Magnus Bruaset <Are.Magnus.Bruaset@si.sintef.no>

Date: Wed, 10 Apr 1996 11:59:23 +0200

**Subject: Addendum to SciTools'96 announcement**

SciTools'96

Updated call for papers

In the March 31 issue (13/96) of NA Digest we announced the SciTools'96

workshop to take place in Oslo, Norway this September. Since the

announcement was made, we have been contacted by the international

publisher Birkhauser concerning the possibility of publishing a book

based on carefully selected contributions to the workshop. We feel that

this information is important and it should therefore be communicated to

our potential contributors. For further details, see the workshop web

pages at http://www.oslo.sintef.no/SciTools96/.

On behalf of the SciTools'96 Organizing Committee,

Are Magnus Bruaset

SINTEF Applied Mathematics

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

From: Trini Flores <flores@siam.org>

Date: Mon, 08 Apr 96 10:01:39 EST

**Subject: ACM-SIAM Symposium on Discrete Algorithms**

CALL FOR PAPERS

SODA 97

Eighth Annual ACM-SIAM Symposium on Discrete Algorithms

January 5-7, 1997

Le Meridien New Orleans Hotel

New Orleans, Louisiana

This symposium concerns research on the use, design, and analysis of efficient

algorithms and data structures, in areas including, but not limited to:

o Combinatorial Structures

o Computational Biology

o Computational Geometry

o Databases and Information Retrieval

o Discrete Optimization

o Graphs and Networks

o Machine Learning

o Number Theory and Algebra

o On-line Problems

o Pattern Matching and Data Compression

o Random Structures

o Symbolic Computation

Papers will be selected for presentation based on extended abstracts.

Authors wishing to submit a paper should send nineteen copies (hard

copies only) of an extended abstract (not a full paper) to:

SIAM Conference Coordinator

3600 University City Science Center

Philadelphia, PA 19104-2688, U.S.A.

Abstracts must be received at the SIAM office by July 1, 1996 (or

postmarked by June 28, 1996 and sent airmail). This is a firm

deadline; submissions after the deadline will not be considered.

Further information regarding the Symposium can be accessed in electronic

format via SIAM's World Wide Web:

http://www.siam.org/meetings/da97/da97home.htm

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

From: Trini Flores <flores@siam.org>

Date: Mon, 08 Apr 96 10:01:39 EST

**Subject: SIAM Conference on Discrete Mathematics **

June 17-20, 1996

Johns Hopkins University

Baltimore, Maryland

The conference preliminary program; dormitory, hotel, and registration

forms; and transportation information will be available through the

World Wide Web on April 15. Point your browser to:

http://www.siam.org/meetings/dm96/dm96home.htm

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

From: Scott Mitchell <samitch@sandia.gov>

Date: Mon, 8 Apr 1996 14:43:13 -0600

**Subject: International Meshing Roundtable**

Call for papers

5th International Meshing Roundtable

October 10-11, 1996

Pittsburgh, Pennsylvania, U.S.A.

The goal of the 5th International Meshing Roundtable is to bring

together researchers and developers from industry, academia, and

government labs for the exchange of technical information related to

automatic mesh generation. The Roundtable will include an invited

panel of experts discussing topics suggested by the attendees. There

will be numerous opportunities for informal dialog between attendees.

Accepted papers will be published (by Sandia National Laboratories) in

a proceedings, and made available on the WWW if possible.

Typical paper topics include:

* Unstructured triangular and tetrahedral mesh generation

* Unstructured quadrilateral and hexahedral mesh generation

* Mixed element meshing

* Geometry decomposition techniques

* Adaptive mesh generation and refinement, transition control

* Grid relaxation techniques

* Dirty geometry management for meshing

* Special purpose meshing algorithms for particular applications

* Theoretical or novel ideas with practical potential

June 14 - Paper submission deadline (10-15 pages)

July 26 - Acceptance/rejection notices sent to authors

August 23 - Final, camera-ready papers due

October 11-12 - 5th International Meshing Roundtable

The full call for papers and other information can be found at

http://sass577.endo.sandia.gov:80/9225/Personnel/samitch/roundtable96

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

From: Assn. for Women in Mathematics" <awm@math.umd.edu>

Date: Mon, 8 Apr 1996 16:59:54 -0400 (EDT)

**Subject: Julia Robinson Celebration of Women in Math**

TRAVEL FUNDS available for

WOMEN Graduate Students and Recent Ph.D.s

in the Mathematical Sciences

Julia Robinson Celebration of Women in Mathematics

to be held

July 1-3, 1996

at MSRI, Berkeley, California

supported by the National Security Agency, the

Mathematical Sciences Research Institute and the

Association for Women in Mathematics

The celebration of the 25th anniversary of the Association of Women

in Mathematics (AWM) will culminate in the Julia Robinson

Celebration of Women in Mathematics conference. All mathematicians

are invited to attend the conference. The goals of the celebration

are:

* to showcase the recent achievements of women in mathematics;

* to facilitate networking among women in various fields of

mathematics;

* to provide role models and offer mentoring for beginning women

mathematicians;

* outreach to area teachers and students.

The Celebration will be a two and a half day conference to be held

July 1-3, 1996, at the Mathematical Sciences Research Institute

(MSRI) in Berkeley, California. Details of the program can be found

in the MSRI homepage: http://www.msri.org/

Approximately 40 grants to attend the conference will be available to

women in the mathematical sciences. In awarding these grants, preference

will be given to women graduate students and recent Ph.D.s. Applicants

should include a cover letter, an outline of their research (maximum two

double-spaced pages) and a curriculum vita. Graduate student applicants

should also include a letter of recommendation from their advisors. All

non-U.S. citizen applicants must have a current U.S. address.

Send FIVE complete copies of the application materials (including

the cover letter) to:

Julia Robinson Conference Selection Committee

Association for Women in Mathematics

4114 Computer & Space Sciences Building

University of Maryland

College Park, Maryland 20742-2461

(Applications via e-mail or fax are not acceptable.)

ANY QUESTIONS? - PHONE: 301-405-7892 E-MAIL: awm@math.umd.edu

***** APPLICATION DEADLINE: MAY 10, 1996 ******

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

From: Matthias Bollhoefer <matthias.bollhoefer@mathematik.tu-chemnitz.de>

Date: Tue, 9 Apr 1996 13:50:14 +0200 (MESZ)

**Subject: Conference of the ILAS**

Second Announcement and Final Call for Papers

SIXTH CONFERENCE OF THE

INTERNATIONAL LINEAR ALGEBRA SOCIETY

August 14-17, 1996, Chemnitz (GERMANY)

PURPOSE

To bring together researchers and educators in all fields of Linear Algebra

from Numerical Linear Algebra to Algebra, pure and applied, allowing a broad

exchange of ideas and discussion of recent developments in these areas.

Special emphasis: Numerical Linear Algebra, Computational Algebra.

INVITED SPEAKERS

R. Bapat (New Dehli), L. Berg (Rostock), R. Byers (Lawrence), J.-L. Dorier

(Grenoble), M. Eiermann (Freiberg), R. Gow (Dublin), F. Hall (Atlanta),

U. Helmke (W"urzburg), D. Hershkowitz (Haifa), C.-K. Li (Williamsburg),

R. Mathias (Williamsburg), N. Nichols (Reading), B. Parlett (Berkeley),

T. Pate (Auburn), C. Ringel (Bielefeld), P. Van Dooren (Louvain La Neuve).

Olga Taussky-Todd speaker: R. Guralnick (Los Angeles)

After diner speaker: B. Huppert (Mainz)

MINISYMPOSIA

G. Michler: Parallel Computations in Algebra

B. Silbermann: C^*-Algebra Techniques in Computational Linear Algebra

R. Horn: Canonical Forms

N. Higham: Perturbation Theory

ORGANIZING COMMITTEE

B. De Moor (Leuven), G. De Oliveira (Coimbra), L. Elsner (Bielefeld),

T. Laffey (Dublin), V. Mehrmann (Chemnitz, Chairman), G. Michler (Essen),

M. Neumann (Storrs), F. Uhlig (Auburn).

LOCAL ARRANGEMENTS COMMITTEE

D. Happel, F. Lowke, C. Rost, B. Silbermann.

CALL FOR PAPERS

Contributed papers from all areas of linear algebra and applications are

solicited. Papers fitting within the scope of the conference will be

accepted, subject to unavoidable limitations of space and time. Selected

papers will be scheduled as 15(+5)-minute presentations in concurrent

sessions.

Two copies of an extended one-page abstract should be submitted by May 1,

1996, to

Volker Mehrmann email: mehrmann@mathematik.tu-chemnitz.de

Fakult"at f"ur Mathematik fax: +49-(0)371-531-2657

TU Chemnitz-Zwickau

D-09107 Chemnitz, GERMANY

Electronic submissions are encouraged. Abstracts should mention all authors

and their affiliations. Please also provide the postal and e-mail address

(or fax number) of the corresponding author to facilitate correspondence.

The abstracts will be collected in a book of abstracts distributed at the

conference. A selection of papers will also be collected in the conference

proceedings but these have to be submitted separately.

For more information contact

Heike Weichelt email: ilas@mathematik.tu-chemnitz.de

Fakult"at f"ur Mathematik phone: +49-(0)371-531-2659

TU Chemnitz-Zwickau fax: +49-(0)371-531-2657

D-09107 Chemnitz, GERMANY

or use our website at the URL http://www.tu-chemnitz.de/ilas/

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

From: Michael Breitner <breitner@math.tu-clausthal.de>

Date: Tue, 9 Apr 1996 16:23:32 +0200 (DFT)

**Subject: Workshop on Optimal Control, Dynamic Games and Nonlinear Dynamics**

First Announcement and Call for Papers

Sixth Viennese Workshop on

Optimal Control, Dynamic Games and Nonlinear Dynamics

Theory and Applications in Economics and OR/MS

Vienna , May 21-23, 1997

After five successful workshops on various similar topics the Sixth Viennese

workshop on Optimal Control, Dynamic Games and Nonlinear Dynamics will again

bring together researchers interested in the application of nonlinear methods

in economics, operations research and management science. Topics of interest

are optimal control theory, dynamic programming, differential games,

evolutionary games, learning, economic modelling, chaos theory, complex

systems and related fields. Theoretical contributions to one of these fields

which are relevant to problems from economics or OR/MS are especially welcome

but also applied modelling will be covered.

The attendance will be limited, and due to the lack of sufficient financial

support by private and public organizations a registration fee of ATS 1500.-

(approx. US$150.-) will be charged. In addition to the scientific program an

extensive social program will be organized.

If you wish to participate in the Workshop please send an email to

ws_vie97@e119ws1.tuwien.ac.at

If you have no access to electronic mail please contact

Prof. Gustav Feichtinger,

Department of Operations Research and Systems Theory,

Vienna University of Technology

Argentinierstrasse 8/119

A-1040 Vienna, AUSTRIA

Fax: +43-1-5054524

by surface mail or fax. To facilitate fast and efficient communication,

answers by email are prefered.

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

From: Patrick Le Tallec <Patrick.Le_Tallec@inria.fr>

Date: Tue, 09 Apr 1996 18:40:57 +0200

**Subject: European Community on Computational Methods in Applied Sciences**

European Community on Computational Methods in Applied Sciences

ECCOMAS 96

Paris, September 9-13, 1996

- SECOND ECCOMAS CONFERENCE ON

NUMERICAL METHODS IN ENGINEERING

- THIRD ECCOMAS COMPUTATIONAL FLUID

FLUID DYNAMICS CONFERENCE

Topics: Computational Methods in Applied Sciences, Fluid

Mechanics and Engineering.

Format: 15 invited speakers, 19 Special Technological Sessions,

27 minisymposia, 360 contributed papers.

Programme: The programme of the conference and the registration forms

are now available on the web at

//www.inria.fr/Colloques/ECCOMAS-eng.html

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

From: Manuel Bronstein <bronstei@inf.ethz.ch>

Date: Fri, 12 Apr 1996 18:13:00 +0200

**Subject: ISSAC'96 Registration Announcement**

I S S A C ' 9 6

International Symposium on Symbolic and Algebraic Computation

July 24-26, 1996 Zurich, Switzerland

Sponsored by ACM SIGSAM and ACM SIGNUM

Registration/Accomodation information and registration forms for ISSAC'96

are now available from the ISSAC'96 homepage at either one of:

http://www.inf.ethz.ch/ISSAC96/ISSAC96.html

http://www.inf.ethz.ch/department/WR/html/ISSAC96

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

From: Venkat Sastry <SASTRY@rmcs.cranfield.ac.uk>

Date: Sun, 14 Apr 1996 12:30:36 +0100 (BST)

**Subject: Building GUIs for FORTRAN programs with Tcl/Tk**

Two Day Course on

Building GUIs for FORTRAN programs with Tcl/Tk

10 -- 11 June 1996

Tool Command Language (Tcl)/ Tool Kit (Tk) is a GUI development tool which

has been increasingly adapted in a variety of applications. This two day course

is aimed at programmers and project managers with particular interest in the

development of inexpensive but effective GUIs for their applications.

For further details contact:

Mrs C Lankaster,

Department of Applied Mathematics and Operational Research,

Cranfield University,

RMCS Shrivenham,

Swindon, Wilts. SN6 8LA,

Tel: 01793 785316

Fax: 01793 784196

Email: amor@rmcs.cran.ac.uk

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

From: Hans Munthe-Kaas <Hans.Munthe-Kaas@ii.uib.no>

Date: Tue, 9 Apr 1996 10:25:07 +0200

**Subject: Report on "State of the Art in Numerical Analysis" Conference**

State of the art in Numerical Analysis?

What has happened in Numerical Analysis during the last 10 years, and

what are the most interesting future developments in the field? These

questions were the topics in the conference 'State of the art in Numerical

Analysis' held April 1-4 in York, England. The conference has been

arranged every tenth year since 1966 by IMA (The Institute of Mathematics

and its Applications), and this year it gathered 112 mathematicians from

about 16 countries. Gene Golub asked me to summarize the conference for

the NA-Net readers:

The conference centered around the central themes in numerical analysis:

- Linear algebra

- Ordinary differential equations

- Integral equations

- Approximation

- Optimization

- Partial differential equations

And in addition there was a session on new applications. I will here give

a brief personal summary of the various topics, which of course to some

extent is colored by my own personal interests. All the talks will appear in

the conference proceedings, published by IMA. Judged from the quality of

the talks, this will be a very valuable reference source.

Linear Algebra:

Talks were given by Nick Higham (dense linear algebra), Iain Duff (sparse

direct methods), Gene Golub (iterative methods for linear systems) and

Henk van der Vorst (sparse eigenproblems). The main developments in dense

linear algebra during the last 10 years has been centered around all the work

with the LAPACK project for dense linear algebra. Parallel computers have been

around only for about a decade, so most of the work on parallel linear

algebra is done in this period. This is now seen through the organization

of algorithms around block formulations via the BLAS 2 and 3 routines.

Interestingly, also sequential computers gain speed by this organization.

Also in sparse computations, much of the activity has been inspired by

parallel computers. For iterative methods, the main contributions during

the last decade is perhaps the development of Krylov subspace techniques

for unsymmetric systems (GMRES, CGS, Bi-CGSTAB, QMR). And in eigenproblems

there have been a significant development of Lanczos and Arnoldi type

methods. Some old methods have gained new significance (Jacobi) and some

new ideas have been introduced due to parallel computers (divide and

conquer algorithms). Even some new basal mathematical tools have gained

significant importance (pseudospectra).

Where are we going now? It seems as parallelism per se is not a topic of

major popularity, but it will of course remain constantly in our heads when

we contemplate over new algorithms. Since the 'black box' software

packages in linear algebra is now so excellent, much work in the future will be

centered around exploiting structures which arise in various application

areas. This was pointed out by Gene, who said that he 'just late in life'

realized the importance of exploiting all the information which comes from

knowing the structure of the underlying problems. A lot of this

information is lost if we regard our problems as being 'purely' linear

algebra.

Ordinary differential equations:

In this area, the need for alternatives to the 'black box' software was

even more emphasized than in linear algebra. All the three speakers; Chus

Sanz-Serna (geometric integrators), Andrew Stuart (dynamical systems) and Arieh

Iserles (beyond the classical theory of ODEs), pointed out that there is a

major need for understanding how to conserve various properties of equations

that are essential mathematically, and which has not been given enough

consideration numerically. Chus summarized the work done during the last 10

years on preserving symplecticity and Andrew Stuart talked about recovering

the correct asymptotic properties of dissipative dynamical systems (limit

sets and attractors). Here the classical notion of measuring quality

by the global error is not relevant. Ariehs talk summarized the work done

on delay differential equations and differential algebraic systems during the

last decade. He pointed out some areas of significant current research,

where we may gain major insight in the next decade. This includes the work

currently undertaken to understand the integration of equations where the

solution is known to sit on a specific manifold or on a Lie group. In the

discussion someone pointed out that "Whereas one 20 years ago didn't need

to know much about differential equations to work with numerical solutions

of them, this is no longer the case".

Integral equations:

Two talks were given about integral equations; Christopher Baker (Volterra

functional and integral equations), Kendall Atkinson (Boundary integral

equations). Also in these areas the last decade has been very fruitful. For

boundary integral equations much of the understanding of the numerical

analysis of corner singularities have been gained in this period. For me

as an outside viewer in this field, the most fascinating developments have

perhaps been the various fast algorithms for solving the dense matrix

problems arising in these fields. (Fast multipole algorithms and algorithms

based on wavelet compression and multiresolution analysis). Now the

solution techniques for these dense linear algebra problems have become so fast

that it is important not to form the coefficient matrix explicitly. (The

complexity of solving the linear systems is smaller than the complexity of

assembling the coefficient matrix!)

Approximation:

Talks were given by Alistair Watson (emphasis on the univariate case),

Mike Powell (multivariate interpolation), David Broomhead (neural net

approximations). The most important development in approximation has

probably been the field of wavelets, briefly summarized in Watsons talk.

Optimization:

Three talks in this field: Jorge Nochedal (unconstrained optimization),

David Shanno (interior point methods), Nick Gould (nonlinear constraints).

There has been a tremendous amount of work on interior point methods this

decade, and Shanno referred to large industrial optimization problems where

interior point methods beat simplex by a factor 50 in speed.

Partial diff. eqn:

The talks on PDEs were: Franco Brezzi (Stabilization techniques and

subgrid scales capturing), Charlie Elliott (Large approximation of

curvature dependent interface motion), Endre Suli (Finite element methods

for hyperbolic problems: stability, accuracy, adaptivity), Bill Morton

(Approximation of multi-dimensional hyperbolic PDEs). Some keywords from these

talks are error control and adaptivity.

New applications:

There were two talks on applications; Frank Natterer (Tomography) and

Jean-Michel Morel (nonlinear filtering and PDEs). Morels talk about the

connection between filtering techniques in computer vision and partial

differential evolution equations was highly inspiring. The idea is to

classify various families of discrete image filters via the PDEs they

approximate. In some sense, the work in this field resembles the early work

on statistical mechanics/ transport theory/ continuum mechanics in the

last century. This is an area in its infancy, where the basic

understanding of the processes involved is being developed in the language

of PDEs.

Concluding remarks:

It is hard to summarize all the developments that has been going on in

numerical analysis during the last decade. It has been an immensely

fruitful period, and the subject is truly alive and developing.

It is also a pleasure to remark that the numerical analysis community consists

of a bunch of cheerful people, and that the friendly spirit of the 'late

hours' is also a part of the 'State of the Art' in our field. This was

evident in the hilarious dinner speech by John C. Mason. Thanks to the

organizing committee chaired by Alistair Watson, and to Pamela Bye for

arranging all the practical details.

Info is also found at:

http://www.amtp.cam.ac.uk/user/na/SotANA/SotANA.html

Hans Munthe-Kaas

University of Bergen

Norway

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

From: Ken Turkowski <turk@apple.com>

Date: Mon, 8 Apr 1996 15:05:25 -0700

**Subject: Positions Available at Apple Computer**

Image Mosaicing: Utilization of Computer Vision techniques to extract

relative 3D information from a set of images and construct a panoramic

environment.

Skills Required: C/C++, Vector Calculus, Projective Geometry, Optimization,

3D Computer Graphics, Computer Vision.

Stereographic Object Reconstruction: Develop a geometric model and texture

map from several photographs of an object.

Skills Required: C/C++, Vector Calculus, Projective Geometry, Optimization,

3D Computer Graphics, Computer Vision, Optic Flow.

Please send CV's and relevant experience to

Ken Turkowski

Apple Interactive Media Group

Apple Computer, Inc.

1 Infinite Loop

MS 301-3M

Cupertino, CA 95014

turk@apple.com

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

From: Teresa Anne Parks <tparks@caam.rice.edu>

Date: Wed, 10 Apr 1996 08:57:42 -0500 (CDT)

**Subject: Postdoctoral Position at Rice University**

RESEARCH SCIENTIST - RICE UNIVERSITY

The Optimization Project of the Center for Research on Parallel Computation

has a postdoctoral position in applications and algorithm development for

large scale numerical nonlinear programming. This position will be under

the direction of Professor John Dennis and Professor Matthias Heinkenschloss

and will be a research appointment in the Department of Computational &

Applied Mathematics.

DUTIES: Conduct independent and joint research in computational

optimization problems rooted in engineering. Specific areas of activity

include optimization software development, development of research

directions, interface with application scientists and engineers,

supervision of graduate and undergraduate research assistant, including

research seminar organization.

QUALIFICATIONS: Applicant must have excellent communication skills and an

ability to work with specialists in varied fields. Applicant must have

demonstrated interest and expertise in at least two of the following:

Algorithm development for nonlinear programming, numerical software

development, nonlinear programming approaches to engineering design or

parameter identification. Ph.D. or equivalent. Applicant's record of

publication will be considered.

TERM: One year commencing June 1, 1996 with possible renewal.

SALARY: Competitive

APPLICATION DEADLINE: April 26, 1996

SEND RESUME TO: RICE UNIVERSITY, EMPLOYMENT OFFICE-MS 56,

6100 MAIN STREET, HOUSTON, TEXAS 77005-1892

AN EQUAL OPPORTUNITY, AFFIRMATIVE ACTION EMPLOYER

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

From: Juan Meza <meza@salsa.ca.sandia.gov>

Date: Thu, 11 Apr 1996 10:15:39 -0800 (PDT)

**Subject: Postdoctoral Position at Sandia Laboratories, Livermore**

Research Fellowship

Sandia National Laboratories

Livermore, California

Sandia National Laboratories invites outstanding candidates to apply

for a postdoctoral position in computational sciences. Postdoctoral

positions at Sandia provide an exceptional opportunity for innovative

research in scientific computing on advanced architectures and are

intended to promote the transfer of technology from the laboratory

research environment to industry and academia through the advanced

training of new computational scientists. Candidates should have a

Ph.D. or the equivalent in applied mathematics, computer science, or a

related field, and have a strong interest in computational modeling

research.

Sandia has strong research programs in scientific and parallel

computing and computational mathematics. We seek a candidate with a

research agenda to augment these programs in addition to a strong

interest in the development of state-of-the-art methods for solving

computational science problems. Sandia supports an excellent

computational environment that includes high-performance scientific

workstations and access to state-of-the-art parallel computers.

The postdoctoral position can be for periods of one, two, or three

years. Applications should be addressed to: Sandia National

Laboratories, attn: Anna Isham, Mail Stop 9111, HR Department,

8522-CA0011, P.O. Box 969, Livermore, CA 94551, and must include a

resume' and the names and addresses of three references.

For further information contact Juan Meza (e-mail: meza@ca.sandia.gov,

WWW: http://midway.ca.sandia.gov/~meza)

Sandia National Laboratories is an Equal Opportunity Employer /

Affirmative Action Employer. U.S. Citizenship is required.

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

From: Chris Petrie <Chris.Petrie@newcastle.ac.uk>

Date: Fri, 12 Apr 1996 14:28:45 +0100 (BST)

**Subject: Research Position at Newcastle upon Tyne**

UNIVERSITY OF NEWCASTLE UPON TYNE

DEPARTMENT OF ENGINEERING MATHEMATICS

RESEARCH ASSOCIATE

Theoretical study of two-phase gas-solid and gas-liquid flow.

This is a new three year EPSRC funded post in the area of turbulent two-phase

flow modelling. The research will involve the development and analysis of a

variety of mathematical models using both two-fluid and kinetic approaches,

and will contribute to on-going studies in this area within the Department.

Candidates should have a background in theoretical fluid dynamics and, ideally,

should have some knowledge of multi-phase systems. Experience in computer

programming and a knowledge of numerical methods applied to fluid dynamics

will also be an advantage.

Starting salary will be up to GBP16,628 pa on the Grade 1A scale

(GBP14,317 - GBP21,519 pa) according to qualifications and experience.

For information about the Department, see WWW URL http://www.ncl.ac.uk/~nengm/

For further details please contact Professor Yuri Sergeev

Department of Engineering Mathematics, University of Newcastle

Newcastle upon Tyne, NE1 7RU, UK.

tel: (+44)(0) 191 222 6284

email: Yuri.Sergeev@ncl.ac.uk

with whom applications, with full c.v. and the names and addresses of three

referees, should be lodged not later than 1st May 1996.

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

From: Claude Pommerell <claude.pommerell@chcrc.abb.ch>

Date: Fri, 12 Apr 1996 19:21:33 +0200

**Subject: Position at ABB Corporate Research in Switzerland**

ABB is a world-wide leader in power generation and distribution, industrial

automation, and mass transportation. In our Swiss Research Center near Zurich,

approximately 200 scientists and engineers are working on the basics of new

products for ABB. We have research projects in the areas of combustion

engineering, aerodynamics, environmental technology, materials science,

measurement techniques, and computer science.

Within our Computer Engineering Department, we have an immediate opening for a

permanent position as a

Scientific Computing Expert

The candidate should have a broad background in scientific computing. He or she

should be able to analyse practices in computational environments, identify

problems and find solutions, and should have experience in most of the

following levels of scientific computing:

- mathematical modeling

- numerical analysis

- parallel computing

- high-performance computing environments

- commercial simulation software

- UNIX system tuning

- computer networks

Furthermore, experience in the following fields is a plus:

- computational fluid dynamics

- benchmarking

- WWW technology

Communicative skills are essential, since the candidate will often have to

interface between scientists, engineers, and managers in very different fields,

advise them on improvements, and articulate ideas in their own terminology.

The position requires the willingness to learn German.

Interested applicants should submit a curriculum vitae by e-mail (ASCII or

PostScript) to <Claude.Pommerell@chcrc.abb.ch>, or to

Claude Pommerell

ABB Corporate Research

CH-5405 Baden-Daettwil

Switzerland

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

From: George Corliss <georgec@boris.mscs.mu.edu>

Date: Fri, 12 Apr 96 16:56 CDT

**Subject: Graduate Research Assistantships at Marquette**

Industrial-Based Graduate Research Assistantships

Marquette University, Milwaukee, Wisconsin, USA

Department of Mathematics, Statistics, and Computer Science

The Marquette University Department of Mathematics, Statistics,

and Computer Science has openings for two Industrial-Based

Graduate Research Assistantships in industrial and applied

mathematics. Students will pursue a Master of Science degree

while working closely with industrial sponsors Johnson Controls

and SC Johnson Wax. One assistantship requires skills in

operations research, the other in statistics and database

design.

Number of openings: two.

Duration: June 3 or August 15, 1996, through December, 1997.

Annual stipend: $12,000 + 18 tuition credits per year.

Deadline: All applications received by May 6 will be considered. If

no suitable candidates are found, applications will be welcomed,

and the positions will be filled by the first suitable applicant.

The NSF funding requires students to be citizens of the USA

or lawfully admitted permanent resident aliens.

An on-site interview at the applicant's expense will be required.

Students from groups traditionally underrepresented in the field

are especially sought.

For information: Dr. George Corliss (georgec@mscs.mu.edu)

Specifics? http://studsys.mscs.mu.edu/~georgec/Jobs/indust_gra.html

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

From: Ake Bjorck <akbjo@math.liu.se>

Date: Tue, 9 Apr 1996 09:46:52 +0200

**Subject: Contents, BIT**

CONTENTS BIT Volume 36, No. 2 (1996)

ISSN 0006-3835

Roundoff error analysis of algorithms based on Krylov subspace methods

M. Arioli and C. Fassino, pp. 189--205

Checking robust nonsingularity of tridiagonal matrices in linear time

I. Bar-On, B. Codenotti and M. Leoncini, pp. 206--220

The iterative correction method for Volterra integral equations

H. Brunner, L. Qun, Y. Ningning, pp. 221--228

A composition law for Runge-Kutta methods applied to index-2

differential-algebraic equations

R. P. K. Chan and P. Chartier, pp. 229--246

Perturbation and error analyses for block downdating of a Cholesky decomposition

L. Eld\'en and H. Park, pp. 247--263

Optimized look-ahead recurrences for adjacent rows in the Pad\'e table

M. Gutknecht and M. Hochbruch, pp. 264--286

Limitations of the L-curve method in ill-posed problems

M. Hanke, pp. 287--301

Finding roots of a real polynomial simultaneously by means of Bairstow's method

W. S. Luk, pp. 302--308

Continuous extensions to Nystr\"om methods for second order initial

value problems

A. Marthinsen, pp. 309--332

Diagonal forms of the translation operators in the fast multipole

algorithm for scattering problems

J. Rahola, pp. 333--358

On fair parametric rational cubic curves

M. Sakai and A. Usmani, pp. 359-377

On some stability bounds subject to Hille-Yosida resolvent conditions

J. Sand, pp. 378--386

Automatic quadrature of functions of the form $g(|f(x)|)$

A. Venter and D. P. Laurie, pp. 387--394

SCIENTIFIC NOTES

High order iterative methods for approximating square roots

B. Kalantari and I. Kalantari, pp. 395--399

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

From: Petr Prikryl <prikryl@beba.cesnet.cz>

Date: Tue, 9 Apr 1996 12:38:33 +0200 (MET DST)

**Subject: Contents, Applications of Mathematics**

APPLICATIONS OF MATHEMATICS

Contents

Volume 41, Number 3 (1996)

B. Rie\v can: On the entropy and generators of dynamical systems

M. Pokorn\'y: Cauchy problem for the non-newtonian viscous

incompressible fluid

D. Goeleven: Noncoercive hemivariational inequality and its

applications in nonconvex unilateral mechanics

News and Notices:

Professor Ivo Babuska is seventy

70th birthday of Vratislav Hor\'alek

Book reviews

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

From: SIAM <poulson@siam.org>

Date: Tue, 09 Apr 96 14:23:43 EST

**Subject: Contents, SIAM Discrete Mathematics**

SIAM Journal on Discrete Mathematics

May 1996

Volume 9, Number 2

pp. 167-348

Finding a Domatic Partition of an Interval Graph in Time O(n)

Glenn K. Manacher and Terrance A. Mankus

On a Question of Erdos on Subsequence Sums

Don Coppersmith and Steven Phillips

Spanning Trees-Short or Small

R. Ravi, R. Sundaram, M. V. Marathe, D. J. Rosenkrantz, and S. S. Ravi

On the Nonexistence of Perfect Codes in the Johnson Scheme

Tuvi Etzion

A Graph-Coloring Result and its Consequences for Polygon-Guarding Problems

Frank Hoffmann and Klaus Kriegel

Classifying Hyperplanes in Hypercubes

Oswin Aichholzer and Franz Aurenhammer

Packing Steiner Trees: Separation Algorithms

M. Grotschel, A. Martin, and R. Weismantel

On the Power of Democratic Networks

E. N. Mayoraz

Bounding Functions and Rigid Graphs

Michael O. Albertson and Ruth Haas

A Linear Algorithm for Maximum Weight Cliques in Proper Circular Arc Graphs

Binay Bhattacharya, Pavol Hell, and Jing Huang

The Ultimate Categorical Independence Ratio of a Graph

Jason I. Brown, Richard J. Nowakowski, and Douglas Rall

Random Walks on Regular and Irregular Graphs

Don Coppersmith, Uriel Feige, and James Shearer

The L(2,1)-Labeling Problem on Graphs

Gerard J. Chang and David Kuo

Realizing Degree Sequences in Parallel

Srinivasa R. Arikati and Anil Maheshwari

The Total Interval Number of a Graph II: Trees and Complexity

Thomas M. Kratzke and Douglas B. West

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

From: SIAM <thomas@siam.org>

Date: Fri, 12 Apr 96 08:46:24 EST

**Subject: Contents, SIAM Applied Mathematics**

SIAM JOURNAL ON Applied Mathematics

JUNE 1996 Volume 56, Number 3

CONTENTS

Symmetric Singularity Formation in Lubrication-Type Equations for Interface

Motion

Andrea L. Bertozzi

An Inverse Problem in Thermal Imaging

Kurt Bryan and Lester F. Caudill, Jr.

Layer Stripping for the Helmholtz Equation

John Sylvester, Dale Winebrenner, and Fred Gylys-Colwell

Integral Geometry in Hyperbolic Spaces and Electrical Impedance Tomography

Carlos A. Berenstein and Enrico Casadio Tarabusi

Matrix Lie Group-Theoretic Design of Coupled Linear Optical Waveguide Devices

R. W. C. Vance

C^1-Arcs for Minimizers of the Mumford-Shah Functional

Guy David

Slow Passage Through a Pitchfork Bifurcation

G. J. M. Maree

Stochastic Models with Multistability and Extinction Levels

Fritz Colonius, F. Javier de la Rubia, and Wolfgang Kliemann

Information Capacity of Channels with Partially Unknown Noise. I.

Finite-Dimensional Channels

C. R. Baker and I.-F. Chao

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

From: Marilyn Radcliff <radcliff@math.ohio-state.edu>

Date: Fri, 12 Apr 1996 09:03:59 -0400 (EDT)

**Subject: Contents, J. Approximation Theory**

Table of Contents: J. Approx. Theory, Volume 85, Number 1, April 1996

Peter Math\'e

On the existence of unbiased Monte Carlo estimators

1--15

Ying Guang Shi

Necessary conditions for $L_p$ convergence of Lagrange interpolation

on an arbitrary system of nodes

16--26

Michael Prophet

Codimension one minimal projections onto the quadratics

27--42

Jorge Bustamante Gonzalez

Asymptotics for Angelesco-Nikishin systems

43--68

Thomas Bagby, Len Bos, and Norman Levenberg

Quantitative approximation theorems for elliptic operators

69--87

Dimitar K. Dimitrov

On a conjecture concerning monotonicity of zeros of ultraspherical

polynomials

88--97

Y. Makovoz

Random approximants and neural networks

98--109

Note

Kamen G. Ivanov and Boyan Popov

On convex approximation by quadratic splines

110--114

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

From: Vladik Kreinovich <vladik@cs.utep.edu>

Date: Sat, 13 Apr 96 17:26:02 MDT

**Subject: Contents, Reliable Computing**

Reliable Computing. - 1996. - N 2 (2). - 114 p.

CONTENTS

Preface 95

Mechanising the theory of intervals using OBJ3

Marcilia A. Campos, Augusto C. A. Sampaio, and Alexandre H. F.

Brainer 97

Errors in vector processing and the library libavi.a

Tiaraju A. Diverio, Ursula A. Fernandes, and Dalcidio

M. Claudio 103

Chebyshev acceleration techniques for large complex non

Hermitian eigenvalue problems

Vincent Heuveline and Miloud Sadkane 111

Interval methods that are guaranteed to underestimate (and the

resulting new justification of Kaucher arithmetic)

Vladik Kreinovich, Vyacheslav M. Nesterov, and Nina A. Zheludeva 119

On the computational complexity of the solution of linear

systems with moduli

Anatoly V. Lakeyev 125

Software for high radix on-line arithmetic

Thomas Lynch and Michael J. Schulte 133

Self-correcting polynomial programs

Guevara Noubir and Henri J. Nussbaumer 139

Reducing division latency with reciprocal caches

Stuart F. Oberman and Michael J. Flynn 147

Interval approach challenges Monte Carlo simulation

Janne Pesonen and Eero Hyvonen 155

Interval operations involving NaNs

Evgenija D. Popova 161

Enclosing solutions of overdetermined systems of linear interval

equations

Jiri Rohn 167

Numerical solutions of Burgers' equation with a large Reynolds

number

Masaaki Sugihara and Seiji Fujino 173

Rank of convex combinations of matrices

Tomasz Szulc 181

Locating, characterizing and computing the stationary points of

a function

Michael N. Vrahatis and Evangelia C. Triantafyllou 187

Reviews

Applications of Reliable Scientific Computing 195

Addresses of the Editorial Board members 204

Information for authors 206

Contents 207

The contents of all the issues, as well as other information related to

interval computations, is placed on the Interval Computations website

http://cs.utep.edu/interval-comp/main.html

(for journal, click on the Journal link in the main menu)

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

End of NA Digest

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