**Today's Topics:**

- Unsymmetric Eigenvalue Problem
- Fortran 77 to C Converter Available via Netlib
- International Conference on Numerical Methods
- Change of Address for Deepankar Medhi
- Kaj Madsen Visiting Multiflow Computer
- Positions at Southern Methodist
- Group Leader Position at Los Alamos

From: Alan Cline <cline@cs.utexas.edu>

Date: Wed, 15 Nov 89 14:53:03 CST

Unsymmetric Eigenvalue Problem

A problem that is important in dynamical systems is the

computation of an eigenvalue of maximum real part given a large

(perhaps of order in the thousands), sparse, real, unsymmetric matrix.

(Since the matrix is real, there may be a complex conjugate pair

having the maximum real part.) The matrix is parameterized and the

region of interest is exactly that point where any of the eigenvalues

enter the right half-plane, so the maximum real part may be quite

small. Are there some suggestions for dealing with this problem?

Please direct responses to cline@cs.utexas.edu.

Alan Cline

The University of Texas at Austin

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

From: Norm Schryer <nls@research.att.com>

Date: Thu, 16 Nov 89 17:17:35 EST

The Unix command

(echo filter f2c; cat file) | mail netlib@research.att.com

converts the Fortran 77 in "file" to C and returns it via email.

The converted C requires a "header" file which can be obtained by:

echo "send f2c.h from f2c" | mail netlib@research.att.com

The command

echo "send index from f2c" | mail netlib@research.att.com

returns an index of useful f2c information available from Netlib

including a "man page", source for libraries, etc.

F2c "just" prints out the C parse tree internally produced by f77,

the reliable old Fortran 77 compiler of Stu Feldman.

The programming was done by D. M. Gay of Bell Labs and

Mark Maimone of Carnegie-Mellon University.

The usual caveat applies:

The service is free and you get what you pay for.

An additional caveat is that a daemon saves the Fortran submitted

to Netlib so we can do regression testing on f2c.

We intend to put f2c in the public domain and want as much

experience with it as possible before foisting it on the world.

Comments, questions and complaints to

Norm Schryer, nls@research.att.com, 201-582-2912.

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

From: Giovanni Monegato <MONEGATO%ITOPOLI.BITNET@Forsythe.Stanford.EDU>

Date: Mon, 13 Nov 89 09:03 GMT+1

International Conference

on

NUMERICAL METHODS IN APPLIED SCIENCE AND INDUSTRY

Torino, Italy, June 18-21,1990

Organized by: Seminario Matematico dell'Universita e del Politecnico

di Torino

Scientific Committee: F.Brezzi, C.Canuto, L.Gatteschi, G.Monegato

Invited Speakers: F.Andreuzzi, O.Axelsson, I.Babuska, K.J.Bathe,

C.A.Brebbia, J.Douglas, W.Hackbusch, T.J.R.Hughes,

G.C.Hsiao, J.Lyness, G.Maier, P.P.Strona, W.Wendland

There will be no short communication sessions

Registration Fee: 200.000 Italian Lira; this amount includes the Proceeding

of the Conference, four working lunches, gala dinner.

For information write to:

Numerical Methods Conference

Dipartimento di Matematica

Politecnico di Torino

Corso Duca degli Abruzzi, 24

I-10129 Torino, Italy

or to MAT1@ITOPOLI.BITNET

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

From: Deepankar Medhi <dmedhi@vax2.cstp.umkc.edu>

Date: 14 Nov 89 08:46:00 CDT

I have left AT&T Bell Laboratories to join University of Missouri-Kansas

City starting this fall. Please note my new address:

Deepankar (Deep) Medhi

Computer Science Telecommunications Program

University of Missouri-Kansas City

5100 Rockhill Road

Kansas City, MO 64110-2499

Phone: (816) 276-2006

FAX: (816) 276-5159

E-mail: dmedhi@vax2.cstp.umkc.edu

or, dmedhi@umkcvax2.bitnet

or, na.medhi...

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

From: Jerzy Wasniewski <mfci!wasniews@uunet.UU.NET>

Date: Tue, 14 Nov 89 08:17:10 EST

KAJ MADSEN TO SPEAK AT MULTIFLOW COMPUTER

December 15th, 1989, 11:30 a.m.

Multiflow Computer, Inc.

31 Business Park Drive

Branford, CT 06405

(203) 488-6090

No Fee

Attendance by reservation only

Please contact Mike Bernhardt to register for this lecture.

A METHOD FOR LINEAR L1-APPROXIMATION

Kaj Madsen, Institute for Numerical Analysis

The Technical University of Denmark

This talk concerns the problem of minimizing the sum of the

absolute values of m linear functions.

This problem is similar (equivalent) to the linear programming

problem, and it has previously been solved using active set

strategies, similar to the Simplex Method for this problem.

The new method presented is based on smoothing the

(non-differentiable) L1 problem. A Newton type method is applied

to the smooth problems. In the final stages of the iteration an

active set strategy is applied. Numerical experiments with the new

method indicate superiority to the simplex type methods by a factor

of at least 2.

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

From: Ian Gladwell <smu!gladwell@uunet.UU.NET>

Date: Fri, 17 Nov 89 09:12:38 CST

Southern Methodist University

Department of Mathematics

Junior Tenure-Track Positions

The Department of Mathematics at Southern Methodist University seeks

applications for junior tenure-track positions with employment beginning

Fall 1990. An outstanding candidate may be considered for a more senior

position. Candidates should be active researchers in applied or numerical

mathematics and should have a strong commitment to teaching. The

department has an active doctoral program. Applicants must be able to

teach graduate level courses in applied mathematics, numerical analysis or

scientific computation. The teaching load for each position is two courses

(six hours) per semester. There may also be visiting positions available

in academic year 1990-91.

Southern Methodist University has about 8000 students. The Department of

Mathematics has a strong and ongoing commitment to the development of

classical and modern applied mathematics. Thirteen of the sixteen

full-time faculty are applied or numerical mathematicians. Current areas

of research include mathematical modeling of physical and biological

phenomena, nonlinear waves, perturbation methods, fluid dynamics,

numerical bifurcation, mathematical software, numerical solution of

differential equations, and parallel computation. Candidates should be

active in one of these areas or a related one. Senior faculty and their

interests include D.H. Anderson (mathematical biology), W.E. Ferguson

(numerical partial differential equations), I. Gladwell (mathematical

software), R. Haberman (nonlinear waves), G.W. Reddien (bifurcation

theory), D.A. Reinelt (fluid dynamics) and L.F. Shampine (numerical

ordinary differential equations). Among its computers, the university has

a Sequent Symmetry for research use.

Applications must be received by January 10, 1990. Please send a vita and

three letters of recommendation to: Professor I. Gladwell, Chair,

Department of Mathematics, Southern Methodist University, Dallas, Texas

75275 (Tel: (214) 692-2506, FAX: (214) 692-4099) who may also be contacted

with any questions concerning the positions.

I. Gladwell's email addresses are:

na.gladwell@na-net.stanford.edu

and

h5nr1001 at smuvm1 (on bitnet)

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

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

From: Andrew White <abw@scrump.c3.lanl.gov>

Date: Fri, 17 Nov 89 15:06:58 MST

Attached is a job ad for a Group Leader position at Los Alamos. I hope that

this is self-explanatory, but if not plese send me e-mail at abw@lanl.gov.

Andy White

The Computing and Communications Division at the Los Alamos National Laboratory

is seeking a candidate to provide management and technical leadership for the

Computer Research Group.

Current activities include general computational applied mathematics, signal

processing, mathematical algorithms and libraries, experimental computing

technology, computer performance measurement, expert systems, neural networks,

speech recognition, advanced computing architectures, user tools, languages,

pattern recognition, and image processing.

AREAS OF RESPONSIBILITY

o Providing management and leadership in computer research applicable to

problems of interest to the Laboratory

o Collaborating with universities, other Laboratories, and industrial

partners

o Recruiting and evaluating personnel

o Salary administration, financial reporting, and affirmative action

planning

o Communicating and interacting with management and staff throughout the

Laboratory, DOE, other government agencies, and academia

The successful candidate should have extensive experience in the following

areas: leading technical research efforts; managing and supervising technical

staff; demonstrated ability in interacting with funding agencies, other

research efforts, potential users of research results, and management; and

a proven research record in some area of computer research, application of

computers to problem solving, and development of computer software.

A Master's, Ph.D., or equivalent experience in computer science, physics,

mathematics, or related scientific or engineering field, is necessary.

The Los Alamos National Laboratory, which is located in the scenic mountains of

northern New Mexico, offers a competitive salary and benefits package.

FOR INITIAL CONSIDERATION, submit a resume no later than 12/1/89 to Andy

White, Los Alamos National Laboratory, MS B260, #90878RA, Los Alamos, New

Mexico 87545. For additional information, call Andy at (505) 667-6164.

TO FORMALLY APPLY, submit a resume to Ray Archuleta, Los Alamos National

Laboratory, Personnel Services Division, #90878RA, Los Alamos, New Mexico 87545.

Los Alamos is an Affirmative Action/Equal Opportunity Employer. Security

clearance required.

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End of NA Digest

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