### Today's Editor:

- Cleve Moler
- The MathWorks, Inc.
- moler@mathworks.com

- Navier-Stokes Solver Sought
- Parallel LAPACK?
- Software Sought for Meshing in 3D
- Academic Programs on Scientific Computing
- New E-mail Address for Jim Greenberg
- Change of Address for Greg Luther
- Address Changes for John Buoni and Bruce Mattingly
- Iterative Methods Moves Mountains
- Managing Director Position at SIAM
- Graduate Assistantships at Los Alamos
- Position at University of Bonn
- Position at Southern Methodist University
- Position at North Carolina State University
- Position at Yale
- Position at Sandia Livermore
- 1995 IMA Linear Algebra Conference in Manchester
- Proceedings of Conference on Numerical Integration
- Block Elimination Codes Available
- Preprints via FTP from Chemnitz

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

From: Melanie Stein <melanie@ams.sunysb.edu>

Date: Wed, 13 Oct 93 12:07:45 EDT

**Subject: Navier-Stokes Solver Sought**

I am hoping to find a 3-D stationary Navier-Stokes solver for

moderate Reynolds numbers (order 10). Any language okay,

FORTRAN preferred. Would be grateful for any suggestions

people might have.

melanie@ams.sunysb.edu

Melanie Stein

Applied Math and Statistics/

Marine Sciences Research Center

SUNY-Stony BrooK

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

From: Roy Richter <rrichter@ph.gmr.com>

Date: Wed, 20 Oct 93 15:54:17 EDT

**Subject: Parallel LAPACK?**

I'm solving some moderate size banded Ax=b

problems (say 4500 rows, bandwidth 250) and I'd like to run them on a

multiple processor shared-memory machine, say a Sun with 4 or 8

processors, not a massively parallel machine. I would increase my size

with a faster solver.

Any pointers to a solver that would help me out?

Please email replys to me directly.

Thanks for your help.

Roy Richter Internet: rrichter@ph.gmr.com

Physics Dept, GM Research UUCP: rphroy!rrichter

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

From: Hans Kraaijevanger <kraaijevangerj@ksepl.nl>

Date: 21 Oct 1993 16:36:09 +0100

**Subject: Software Sought for Meshing in 3D**

Can anyone help me with public domain software for dividing a set V

in 3D space into tetrahedra (or other convenient elements) ?

One may assume that the set V is closed, bounded and connected, but

not necessarily singly connected (so, there can be holes in V).

In fact, the boundary of V consists of a finite number of triangles.

The tetrahedral mesh to be generated should be consistent with these

boundary triangles.

Please contact me if you have (or know of) such a code.

Hans Kraaijevanger (kraaijevangerj@ksepl.nl)

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

From: S. P. Norsett <norsett@imf.unit.no>

Date: Thu, 14 Oct 1993 09:40:38 +0100

**Subject: Academic Programs on Scientific Computing**

Program on Scentific Computing.

At the university of Trondheim, Norway we are in the planning of

a program in Scientific Computing. Since I am in the committee,

set down by the rector I have been asked to get information from

other universities on the program they have in such a direction of

studies. I ask you to send me such information on the program you

have, either by e-mail or by slow mail.

Yours sincerely

Prof. Syvert P. Norsett

Department of Mathematical Sciences

NTH

N-7034 Trondheim

Norway

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

From: James Greenberg <greenber@math.umbc.edu>

Date: Fri, 15 Oct 1993 11:17:27 -0400 (EDT)

**Subject: New E-mail Address for Jim Greenberg**

My new e-mail address is : greenber@math.umbc.edu

- Jim Greenberg

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

From: Greg Luther <luther@illiac.unm.edu>

Date: Wed, 13 Oct 93 17:00:16 MDT

**Subject: Change of Address for Greg Luther**

Please note my new email:

luther@math.unm.edu

This has changed from luther@math.arizonza.edu.

Thanks, Greg Luther

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

From: Bruce Mattingly <rbm@math.ysu.edu>

Date: Mon, 18 Oct 1993 21:00:20 -0400

**Subject: Address Changes for John Buoni and Bruce Mattingly**

Due to administrative changes, there are slight changes

in the addresses for John Buoni and Bruce Mattingly:

office address: Department of Mathematics

Youngstown State University

Youngstown OH 44555

e-mail: buoni@math.ysu.edu

rbm@math.ysu.edu

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

From: Tom Manteuffel <tmanteuf@newton.Colorado.EDU>

Date: Wed, 13 Oct 93 13:27:52 -0600

**Subject: Iterative Methods Moves Mountains**

Iterative Methods Moves Mountains

The Copper Mountain Conference on Iterative Methods will be held

at Breckenridge Colorado April 5-9, 1994, and will be called:

The Colorado Conference on Iterative Methods

A complete announcement is now available. To automatically receive

the announcement, please send email to

cciminfo@newton.colorado.edu

More detailed requests can be sent to

ccim@newton.colorao.edu

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

From: C. William Gear <cwg@research.nj.nec.com>

Date: Wed, 13 Oct 93 17:18:49 EDT

**Subject: Managing Director Position at SIAM**

MANAGING DIRECTOR

Society for Industrial and Applied Mathematics

Applications are invited for the position of Managing Director of

SIAM. The Managing Director is responsible for the planning,

supervision, and fiscal overview of all facets of the society. The

Managing Director is appointed by the Board of Trustees and works

with the President of the Society, its Council, and other groups.

SIAM has an annual budget in excess of $5 million and a headquarters

staff of 50.

Candidates for the position must have proven administrative skills.

A background in applied mathematics or a related area is highly

desirable. The successful candidate should have good interpersonal

skills for working with society volunteers and other organizations.

Prior experience in a technical, professional, or non-profit

organization is valuable.

The salary will be commensurate with experience. Benefits include

life insurance, hospitalization and medical coverage, long term

disability, vacation and pension. SIAM is an equal opportunity

employer and specifically encourages applications from women and

minorities.

The position is available beginning Sept 1, 1994. The search

committee will accept applications and nominations until a candidate

has been approved by the Board. Applications and suggestions should

be sent to the chair of the search committee and clearly marked

"Application/Nomination for position of SIAM Managing Director."

C. W. Gear

Chair, SIAM Managing Director Search Committee

NEC Research Institute

4 Independence Way

Princeton, NJ 08540

Inet: cwg@research.nj.nec.com

UUCP: princeton!nec!cwg

PHONE: (609) 951-2500

FAX : (609) 951-2480

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

From: Wayne Joubert <wdj@c3serve.c3.lanl.gov>

Date: Wed, 13 Oct 93 14:18:12 MDT

**Subject: Graduate Assistantships at Los Alamos**

Graduate Student Research Assistants

Los Alamos National Laboratory

(PARALLEL COMPUTATION AND NUMERICAL ANALYSIS)

The Computer Research and Applications Group at Los Alamos National

Laboratory is currently seeking highly motivated graduate students

to participate in the Graduate Research Assistant program. Students

with experience in any or all of the following categories are

encouraged to apply:

Parallel Computer Programming

Numerical Linear Algebra

Software Library Development

Experience with Fortran, C and assembly languages on parallel

machines such as the Connection Machine CM-2/200, CM-5, Intel

iPSC/860, Paragon and workstation clusters is desirable.

A minimum GPA of 2.5 is required. Appointments can range from

3 to 12 months in duration. Interested individuals are encouraged

to contact Wayne Joubert for more information:

Wayne Joubert

Los Alamos National Laboratory

Group C-3, MS B-265

Los Alamos, NM 87545

EMAIL: wdj@lanl.gov

Los Alamos is an equal-opportunity employer.

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

From: Luckhaus <UNM11B@IBM.rhrz.uni-bonn.de>

Date: Thu, 14 Oct 93 14:06:14 +0000 (MEZ)

**Subject: Position at University of Bonn**

At the University of Bonn a chair for scientific computing

has been created. Emphasis is placed on numerical solutions

of PDE problems on modern computers. The university is

looking for a scientist whose research fits in with the

existing center for nonlinear PDE(sfb 256). Deadline for

applications with cv and list of publications: Dec.13,1993.

Address: Fachgruppe Mathematik-Informatik der Universitaet Bonn

Wegelerstr.10, D-53115 Bonn, Germany

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

From: Ian Gladwell <gladwell@seas.smu.edu>

Date: Thu, 14 Oct 93 09:03 CDT

**Subject: Position at Southern Methodist University**

SOUTHERN METHODIST UNIVERSITY

Department of Mathematics

The Department of Mathematics at Southern Methodist University invites

applications for two tenure-track assistant professorships, with

employment beginning in the Fall semester of 1994. Suitable candidates

may be considered for a more senior position. All applicants must have an

excellent research record in physical applied mathematics, numerical

analysis or scientific computation, and a strong commitment to

undergraduate and graduate teaching. The standard teaching load is two

courses (six hours) per semester. Applicants who wish to be considered

for a senior position must be able to supervise doctoral dissertations and

a strong grant record is desirable.

The Department of Mathematics has an active doctoral program in physical

applied mathematics, numerical analysis and scientific computation;

research interests include asymptotic and perturbation methods,

bifurcation theory, dynamical systems, fluid mechanics, mathematical

biology, mathematical software, nonlinear waves, and the numerical

analysis of differential equations. Fourteen of the seventeen faculty are

applied or numerical mathematicians. The Department of Mathematics has

access to distributed workstations, good Internet connections, and a 20

processor Sequent Symmetry.

Applications will be accepted until January 7, 1994, or until the

positions are filled. Send a letter of application and a vita to:

Professor I. Gladwell, Chairman, Department of Mathematics, Southern

Methodist University, Dallas, Texas 75275-0156. (Tel: (214) 768-2506;

Fax: (214) 768-4138). Applicants should arrange for three letters of

recommendation to be sent directly to Professor Gladwell.

SMU is an equal opportunity/affirmative action/Title IX employer.

I. Gladwell's e-mail addresses:

igladwel@sun.cis.smu.edu

gladwell@seas.smu.edu

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

From: Tim Kelley <Tim_Kelley@ncsu.edu>

Date: Thu, 14 Oct 93 10:12:58 EDT

**Subject: Position at North Carolina State University**

Numerical Analysis Position at North Carolina State University

The department of Mathematics at North Carolina State University

expects to make a tenure-track appointment in numerical analysis

at the rank of assistant professor starting July 1, 1994. The

applicant should have research experience beyond the Ph. D.

The intellectual climate for a numerical analyst at NCSU is lively

and challenging. Our group consists of ten faculty members (within

a department of over sixty faculty) and many graduate students and

postdocs.

The group has research programs in differential algebraic equations,

integral equations, numerical linear algebra, numerical

optimization/nonlinear equations, ordinary and partial differential

equations, control, and parallel computing. The successful

applicant will have the opportunity to become a member of the

Center for Research in Scientific Computation which facilitates

interaction between the faculty in the Mathematics department and

other research institutions and industry.

Faculty in the NCSU Mathematics department have access to the high

performance computing and visualization facilities at the North

Carolina Supercomputing Program.

Applicants should send a vita and have three letters of recommendation

sent to C. T. Kelley, Department of Mathematics, Box 8205,

North Carolina State University Raleigh, NC 27695-8205.

Phone: 919-515-7163. E-mail: Tim_Kelley@ncsu.edu.

0n January 15, 1994 we will begin to select candidates from the

pool of complete applications.

North Carolina State University is an equal opportunity and

affirmative action employer. In its commitment to diversity and

equity, North Carolina State University seeks applications from

women, minorities, and the disabled.

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

From: Judy Smith <smith-judy@CS.YALE.EDU>

Date: Mon, 18 Oct 1993 12:37:00 -0400

**Subject: Position at Yale**

YALE UNIVERSITY

DEPARTMENT OF COMPUTER SCIENCE

We expect to have one or more junior faculty positions available for

the 1994--95 academic year. We are particularly interested in

applicants in the areas of programming languages and systems,

artificial intelligence, and numerical analysis. Applications should be

submitted before March 15, 1994.

Duties will include teaching graduate and undergraduate courses.

Applicants are expected to engage in a vigorous research program.

Candidates should hold a Ph.D. in computer science or related

discipline.

Qualified women and minority candidates are encouraged to apply.

Yale is an affirmative action/equal opportunity employer.

Send vitae and names of three references to: Faculty Recruiting

Committee, Department of Computer Science, Yale University,

P.O. Box 208285, New Haven, CT 06520-8285.

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

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

Date: Wed, 20 Oct 93 09:18:57 -0700

**Subject: Position at Sandia Livermore**

Research Fellowship

Sandia National Laboratories

Livermore, California

The Center for Computational Engineering (CCE) at Sandia National

Laboratories invites outstanding candidates to apply for a

postdoctoral position in the Scientific Computing

Department. 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 must be U.S. citizens, 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.

The CCE has strong research programs in scientific and parallel

computing, linear algebra, and optimization. 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 numerical methods for

solving computational science problems. The CCE supports an excellent

computational environment that includes high-performance scientific

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

(including a 1024-processor nCUBE, a 64-processor Intel iPSC-860, a

1840-processor Intel Paragon, and several large Cray supercomputers).

The postdoctoral position is for a period of one year and may be

renewed for a second year. Applications should be addressed to:

A.M. Isham, Personnel Department, 8522-S39, 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).

Sandia National Laboratories is an Equal Opportunity Employer M/F/V/D.

U.S. Citizenship is required

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

From: Nick Higham <higham@vtx.ma.man.ac.uk>

Date: Fri, 15 Oct 93 15:33:21 +0100 (BST)

**Subject: 1995 IMA Linear Algebra Conference in Manchester**

The Institute of Mathematics and Its Applications

CONFERENCE ON LINEAR ALGEBRA AND ITS APPLICATIONS

This conference will be held at the University of Manchester, England,

from Monday 10th to Wednesday 12th July, 1995.

This is the week following the Third ICIAM Conference, which is being held

July 3-7 1995 in Hamburg, Germany.

Organizing Committee:

N.J. Higham (Chairman, University of Manchester)

I.S. Duff (Rutherford Appleton Laboratories)

R. Fletcher (University of Dundee)

T.L. Freeman (University of Manchester)

S.J. Hammarling (NAG Ltd., Oxford)

N.K. Nichols (University of Reading)

A call for papers will be issued shortly.

For more information please contact:

Miss Pamela Irving

The Conference Officer

The Institute of Mathematics and Its Applications

16 Nelson Street

Southend-on-Sea

Essex, SS1 1EF

UK

tel: 0702 354020

fax: 0702 354111

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

From: Knut Petras <I1040214@DBSTU1.RZ.TU-BS.DE>

Date: Sat, 16 Oct 93 14:10:41 +0000 (MEZ)

**Subject: Proceedings of Conference on Numerical Integration**

NEW BOOK ANNOUNCMENT

Title: Numerical Integration IV

(Proceedings of the Conference at the

Mathematical Research Institute,

Oberwolfach, November 8-14, 1992),

(Internat. Ser. Numer. Math., vol. 112)

Editors: H. Brass, G. Haemmerlin

Publisher: Birkhaeuser Verlag

ISBN: 3-7643-2922-X (Basel...)

0-8176-2922-X (Boston)

===============

From the preface: 'After the conferences in 1978, 1981 and 1987

(Proceedings in ISNM 45, 57, 85), a fourth symposium on numerical

integration was held at Oberwolfach November 8-14, 1992. 46

mathematicians from 16 countries participated. This volume contains

27 refereed papers presented at the conference.

Algorithms for the numerical computation of definite integrals

have been proposed for more than 300 years, but practical consi-

derations have lead to problems of ever increasing complexity, so

that, even with current computing speeds, numerical integration may

be a difficult task. High dimension and complicated structure of

the region of integration and singularities of the integrand are

the main sources of difficulties.

The construction of new rules was therefore a central theme of

the conference. Another line of reasearch attempts to study the set

of all rules of a class with regard to the error or another charac-

teristic. The theory of information-based complexity introduced new

concepts and results into the discussion. The widening of the notion

of optimality to the average case setting seems to be of great in-

terest. As it has been the case in the former conferences, the

Gaussian rule and its relatives have continued to be important ob-

jects of the study.

Many open problems were discussed in Oberwolfach, showing live-

liness and actuality of the theory, nine of these problems could be

given precise formulations; they are collected at the end of this

volume.'

===============

A LATEX-file containing all abstracts of the talks held at

Oberwolfach can be obtained via anonymous ftp at:

address: dhiurzm24.rz.uni-hildesheim.de

directory: pub/publications/quadrature

filename: ni4abs.tex

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

From: Willy Govaerts <Willy.Govaerts@rug.ac.be>

Date: Wed, 20 Oct 1993 09:33:41 +0100 (MET)

**Subject: Block Elimination Codes Available**

Mixed Block Elimination Codes available through NETLIB

The problem

In many computational problems linear systems with coefficient

matrix in block form

( A B )

M = ( )

( C^T D )

arise naturally. Here A is a large square matrix ( n by n )

and matrices B, C, D comprise a border whose width m is

much smaller ( m << n).

Often solvers for A and A^T are relatively easy to construct

because of the structure or sparsity type of A (symmetric,

banded,sparse,...). One wants to use these solvers to solve

linear systems with M and M^T. This can be done by

block elimination in several ways; unfortunately stability

is usually lost in the process. The critical case is when

A is nearly singular but M is reasonably well - conditioned.

The BEMW code

A collection of Fortran subroutines helps remedy this situation.

It is called BEMW (Block Elimation Mixed for Wider borders) by

its authors W. Govaerts (University of Gent, Belgium) and

J. D. Pryce (Royal Military College of Science, England).It

is a reverse communication code of modest size : less than

16Kb including an example program, full documentation and

3 BLAS core subroutines. For simplicity the driver program

is a trivial example (n=m=2) but the code is known to work

well for large discretized boundary value problems with

nearly singular A.

Availability

The codes are contained in the Unix shar file

linalg/bemw.shar distributed through netlib from where it

can be obtained by ftp, e-mail or xnetlib in the

usual way. This file contains real, double precision

and complex versions of BEMW and a special

version for real symmetric M.

What the user should know

The calling program has to provide solvers for both A and

A^T. The BEMW routines do not care about them, as long

as they are stable in the usual backward sense. The

elements of A are not referred to. The matrices B, C, D

have to be stored in a specific but natural way. The

BEMW routines will then solve systems with M and M^T

also in a backward stable way, even for very

ill - conditioned A.

Theoretical foundation

Theory and numerical examples are given by W. Govaerts

(Stable solvers and block elimination for bordered

systems, SIAM J. matrix anal. appl. 12 (1991) 469 - 483)

and W. Govaerts and J. D. Pryce (Mixed block elimination

for linear systems with wider borders, IMA J. Numer.

Anal. 13 (1993) 161 - 180). Further tests in a dynamical

systems context are given by W. Govaerts (Solution of

bordered singular systems in numerical continuation and

bifurcation, to appear in J. Comput. Appl. Maths).

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

From: Volker Mehrmann <volker.mehrmann@Mathematik.TU-Chemnitz.DE>

Date: Thu, 21 Oct 93 18:38:43 +0000 (MEZ)

**Subject: Preprints via FTP from Chemnitz**

The following preprints are available via ftp from the Numerical Analysis Group

of the Technical University Chemnitz. Date October 21.1993

to get the papers proceed as follows:

ftp ftp.tu-chemnitz.de

login name: ftp

password: your email address:

cd /pub/Local/mathematik (Observe the capital L in Local)

there are several directories amnong them the directories:

Mehrmann

He

SPC

each directory contains a file README with titles and abstracts of the

papers.

Here is what you can get:

subdirectory Mehrmann:

abm1.dvi.Z, abm1.ps.Z

A multishift algorithm for the numerical solution of algebraic

Riccati equations

Gregory Ammar, Peter Benner,Volker Mehrmann

bmn3.dvi.Z, bmn3.ps.Z

Regularization of Descriptor Systems by Output Feedback

Angelika Bunse-Gerstner, Volker Mehrmann, Nancy K. Nichols

ehm2fv.dvi.Z, ehm2fv.ps.Z

Minimizing the condition number of a positive definite matrix by completion

L. Elsner, C. He and V. Mehrmann

els_he_m.dvi.Z, els_he_m.ps.Z

Minimization of the norm, the norm of the inverse and the

ocndition number of a matrix by completion

km3.dvi.Z, km3.ps.Z:

Canonical forms for linear differential-algebraic equations with

variable coefficients

Peter Kunkel, Volker Mehrmann

km4.dvi.Z, km4.ps.Z

A new class of discretization methods for the solution of linear

differential-algebraic equations with variable coefficients

Peter Kunkel, Volker Mehrmann

km5.dvi.Z, km5.ps.Z

A new look at matrix pencils

Peter Kunkel, Volker Mehrmann

m_rat2.dvi.Z, m_rat2.ps.Z:

Numerical Methods for the Computation of Analytic Singular Value

Decompositions

Volker Mehrmann and Werner Rath

in the subdirectory He:

iuepnew.dvi.Z, iupnew.ps.Z:

On an Inverse Eigenvalue Problem for Unitary Hessenberg Matrices

Gregory S. Ammar, Chunyang He

sturm.dvi.Z, sturm.ps.Z:

On The Sturm Sequence Of Polynomials For Unitary Hessenberg Matrices

Angelika Bunse-Gerstner, Chunyang He

In the subdirectory SPC:

libs.dvi.Z, libs.ps.Z (SPC 93_1)

Bibliotheken zur Entwicklung paralleler Algorithmen

Gundolf Haase, Thomas Hommel, Arnd Meyer, Matthias Pester

parbem.ps.Z (SPC 93_2)

A Parallel Version of the Preconditioned Conjugate Gradient Method

for Boundary Element Equations

Matthias Pester, Sergej Rjasanow

P.S. New postal code, new private phone number.

Volker Mehrmann Tel.: (049) (0)371-561-2659 (office)

Fachbereich Mathematik Tel.: (049) (0)172-3482395 (private)

TU Chemnitz-Zwickau Fax.: (049) (0)371-561-2657

PSF 964 email: mehrmann@mathematik.tu-chemnitz.de

D-09009 Chemnitz priv. addr.: Fichtestr. 18, D-09126 Chemnitz

FRG

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

End of NA Digest

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