**Today's Topics:**

- Roommate Needed at Copper Mountain Conference
- Liz Jessup Wins Householder Fellowship at Oak Ridge
- Barry Smith Wins Wilkinson Fellowship at Argonne
- Distance of a Matrix to a Subspace
- Numerical Integration Program Wanted
- Summer Programs for Undergraduates
- Nominations Sought for Fifth Householder Prize
- Washington, DC Area E-mailing List
- Dr. Zahari Zlatev Visiting Multiflow Computer, Inc.
- Conference on Numerical Methods for Free Boundary Problems
- SIAM Nordic Section meeting, June 1990
- NAG Floating-point Test Package
- PCGPAK2 for Solving Sparse Linear Equations
- IMA Journal of Numerical Analysis Contents
- SIMAX April Contents
- Lectureship in Mathematics at Edinburgh University
- Chair in Scientific Computing at Umea
- Fellowship at Sandia National Labs

From: T. J. Garratt <tjg%maths.bath.ac.uk@nsfnet-relay.ac.uk>

Date: Mon, 29 Jan 90 15:30:32 GMT

WANTED: Person to share room for conference:

"ITERATIVE METHODS", Copper Mountain, Colorado,

1st - 5th April, 1990.

I am a male postgraduate studying for my PhD in Numerical Analysis

at Bath University, and will be attending the above conference.

To help with the costs of accommodation, I am looking for someone to

share a lodge room or deluxe studio.

Perhaps a student in a similar situation might be interested.

If you are interested or know someone who may be, then please contact:

Tony Garratt,

School of Mathematical Sciences,

Univeristy of Bath,

Claverton Down, Bath.

AVON. BA2 7AY.

United Kindgom.

E-mail: tjg@uk.ac.bath.baths

(OR na.spence@edu.stanford.na-net)

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

From: Bob Ward <ward@rcwsun.EPM.ORNL.GOV>

Date: Tue, 30 Jan 90 10:42:07 EST

Elizabeth R. Jessup has been selected as the winner of the first

Householder Fellowship at the Oak Ridge National Laboratory (ORNL).

Dr. Jessup, who received her doctorate degree in Computer Science in

1989 from Yale University, is currently an Assistant Professor of

Computer Science at the University of Colorado at Boulder. Her

research interests are in parallel computing and numerical linear

algebra.

Dr. Jessup will be collaborating with the researchers in ORNL's

Mathematical Sciences Section and with applied computational scientists

in various divisions at ORNL on scientific problems involving high

performance computing. Her primary interest will be on parallel

algorithms for solving large-scale eigenproblems on a

distributed-memory MIMD multiprocessor. Her fellowship appointment

will begin this summer.

Alston S. Householder was the organizer and founding Director of the

Mathematics Division (precursor of the current Mathematical Sciences

Section) at ORNL. In recognition of the seminal research contributions

of Dr. Householder to the fields of numerical analysis and scientific

computing, a distinguished postdoctoral fellowship program was

established and named in his honor. Householder Fellows will be

appointed annually for a term of one year, renewable for a second

year.

The Householder Fellowship Program is supported by the Applied

Mathematical Sciences Subprogram of the U.S. Department of Energy.

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

From: Jorge More <more@antares.mcs.anl.gov>

Date: Wed, 31 Jan 90 09:21:30 CST

WILKINSON FELLOWSHIP

We are pleased to announce that Barry Smith from the Courant

Institute of Mathematical Sciences is the 1990 Wilkinson fellow.

Barry is a student of Olof Widlund working on domain decomposition

algorithms for the partial differential equations of linear elasticity.

In addition to Courant, he has worked at the IBM T. J. Watson Research

Center, Los Alamos National Laboratory, and at the University of Bergen.

He will join the Mathematics and Computer Science Division of Argonne

National Laboratory in the summer.

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

From: Henry Wolkowicz <hwolkocz@orion.waterloo.edu>

Date: Mon, 29 Jan 90 15:48:23 EST

How would one find (numerically) the distance between a given real

n by n matrix A and the given subspace S, where S is the subspace

of upper triangular matrices which are themselves made up of

k by k upper triangular blocks ?

The distance is the inf of spectral norms (largest singular value).

Henry Wolkowicz; Department of Combinatorics and Optimization;

Faculty of Mathematics; University of Waterloo;

Waterloo, Ontario, Canada N2L 3G1 (519-888-4597 office; 746-6592 FAX)

{hwolkowicz@water.bitnet; na.wolkowicz@na-net.stanford.edu}

{hwolkowicz@water.uwaterloo.ca; usersunn@ualtamts.bitnet }

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

From: Ben Lotto <ben@cps3xx.egr.msu.edu>

Date: 1 Feb 90 20:10:23 GMT

I would like a numerical integration program that will handle a Cauchy

principal value integral of the following form:

\lim_{\epsilon\to 0}

\int_{\epsilon}^{\pi} (f(\theta - t) - f(\theta + t)) / tan(t/2) dt

(this computes the conjugate function of f) where f is a function that

has a a couple of jump discontinuities (I could probably fudge things

and get rid of this) and a log x-type singularity. In particular, I

would like the algorithm to work for the function

f(x) = log |x|, if |x| < \pi / 2

0, if |x| >= \pi / 2

Reply by e-mail, please, as I don't read this newsgroup regularly.

Thanks in advance.

-B. A. Lotto (ben@nsf1.mth.msu.edu)

Department of Mathematics/Michigan State University/East Lansing, MI 48824

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

From: Bill Anderson <XB.N64@Forsythe.Stanford.EDU>

Date: Thu, 1 Feb 90 20:41:31 PST

Last week's NA Digest included an announcement of a Summer program

for undergraduates at CNSF at Cornell. Are there additional Summer

programs to which I could encourage two highly qualified

undergraduates to apply? One is a math major, the other CS.

Thanks in advance!

Bill Anderson

email: xa.e71@forsythe.stanford.edu

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

From: G. W. Stewart <stewart@cs.UMD.EDU>

Date: Fri, 2 Feb 90 07:47:33 -0500

Alston S. Householder Award V (1990)

(Second Posting)

In recognition of the outstanding services of Alston Householder,

former Director of the Mathematics Division of the Oak Ridge National

Laboratory and Professor at the University of Tennessee, to numerical

analysis and linear algebra, it was decided at the Fourth Gatlinburg

Symposium (now renamed the Householder Symposium) in 1969 to

establish the Householder Award. This award is in the area in which

Professor Householder has worked and its natural developments, as

exemplified by the international Gatlinburg Symposia [see A. S.

Householder, The Gatlinburgs, SIAM Review 16:340-343 (1974)]. Recent

recipients of the award include James Demmel (Berkeley), Ralph Byers

(Cornell), and Nicholas Higham (Manchester).

The Householder Prize V (1990) will be awarded to the author of the

best thesis in Numerical Algebra. The term Numerical Algebra is

intended to describe those parts of mathematical research which have

both algebraic aspects and numerical content or implications. Thus

the term covers, for example, linear algebra that has numerical

applications or the algebraic aspects of ordinary differential,

partial differential, integral, and nonlinear equations.

The thesis will be assessed by an international committee consisting

of Chandler Davis (Toronto), Beresford Parlett (Berkeley), Axel Ruhe

(Gothenburg), Pete Stewart (Maryland), and Paul Van Dooren (Phillips,

Belgium).

To qualify, the thesis must be for a degree at the level of an

American Ph.D. awarded between 1 January 1987 and 31 December 1989.

An equivalent piece of work will be acceptable from those countries

where no formal thesis is normally written at that level. The

candidate's sponsor (e.g., supervisor of his research) should submit

five copies of the thesis (or equivalent) together with an appraisal

to

Professor G. W. Stewart

Department of Computer Science

University of Maryland

College Park, MD 20742

USA

by 28 February 1990. The award will be announced at the

Householder XI meeting and the candidates on the short list will

receive invitations to that meeting.

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

From: Michael Mascagni <mascagni@ncifcrf.gov>

Date: Fri, 2 Feb 90 13:04:41 EST

I am happy to announce a newly formed mailing list. The list's purpose is

to distribute information on scholarly talks, meetings, and other events of

interest to the "greater" Washington, DC area community involved in applied

mathematics, computer science, numerical analysis, high performance computing,

and scientific computing. We have identified people at several sites in the

area who have agreed to serve as site contributors. We are quite biased, and

have no doubt left out several sites, group, etc. Our purpose was not to

offend, but to get things going ASAP. So if you wish to be a site contributor,

please send in a request. If you wish to be placed on the mailing list also

send us e-mail. DO NOT E-MAIL TO MY NA-NET ADDRESS. Instead, send mail to

mascagni@jvncf.csc.org with your request. As soon as we have a reasonable

number of announcements, the first mailing will go out. Until then, spread

the word, and please communicate with mascagni@jvncf.csc.org!!

NOTE: PLEASE LIMIT YOUR GEOGRAPHICAL INTEREST TO THE "GREATER" DC AREA!

Thanks for your help in this.--Michael Mascagni

(na.mascagni, but mascagni@jvncf.csc.org for this)

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

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

Date: Mon, 29 Jan 90 07:38:27 EST

Dr. Zahari Zlatev

National Environmental Research Institute,

Division for Emissions and Air Pollution,

Frederiksborgvej 399,

4000 Roskilde, Denmark

visiting Multiflow Computer, Inc. Feb 14 - 16, 1990. Dr. Zlatev

will present two lectures.

1) Thursday, February 15th, 1990 - 12:00 a.m.

Multiflow Computer, Inc.

31 Business Park Drive

Branford, CT 06405

Tel: (203) 488-6090

SEMINAR IN COMPUTATIONAL MATHEMATICS

RUNNING LARGE AIR POLLUTION MODELS ON HIGH SPEED COMPUTERS

A b s t r a c t

The long-range transport of air pollutants ( LRTAP )

over Europe is studied, at the Air Pollution Laboratory of

the Danish Agency of Environmental Protection, by a

mathematical model based on a system of partial

differential equations ( PDE's ) . Four different

physical processes, advection, diffusion, deposition

and chemical reactions (together with emission sources),

are the main components of the LRTAP . These four

processes are described by different terms in the model

(the system of PDE's). Since the space domain is very

large (including the whole of Europe together with parts of

the Atlantic Ocean, Asia and Africa), the discretization of

the system of PDE's leads to huge systems of linear

algebraic equations ( LAE's ) . In the three

dimensional case on a 32 x 32 x 9 grid the number of

LAE's that are to be solved at each time-step is more

than 10**6 when 29 chemical species are involved

in the model. Even if the model is considered as a

two-dimensional model, the number of LAE's is still

very large; more than 10**5 . This explains why one

should make some simplifications in the model description

(which are not always very well justified physically, but

lead to a model that can be handled on the computer used)

and/or one should use high-speed computers. In the latter

case, high performance can be achieved by efficiently

implementing certain kernels which perform the bulk of the

computational work. Fortunately, regular grids are to be

used during the discretization of the LRTAP model. This

leads to the solution of LAE's whose coefficient

matrices are banded and whose solution dominates the

computational load. Several such kernels for solving banded

systems of LAE's will be described. Experimental results

obtained on AMDAHL VP1100, CRAY X-MP and ALLIANT will

be presented and discussed.

2) Friday, February 16, 1990 - 11:00 a.m.

Yale University - Numerical Analysis

A. K. Watson Hall - 51 Prospect Street - room 200

New Haven, CT 06520

SEMINAR IN SCIENTIFIC COMPUTING

SOLVING GENERALLY SPARSE LINEAR SYSTEMS ON PARALLEL COMPUTERS

A b s t r a c t

Consider the system ! Ax = b !. Assume that !A! is a

large and sparse, but neither any special property of this

matrix (such as symmetry and/or positive definiteness)

nor any structure of its non-zero elements (such as

bandedness) can be exploited. For such systems direct

methods may be both time and storage consuming, while

iterative methods may not converge. A hybrid method, which

attempts to avoid the drawbacks of both direct methods and

iterative methods, is proposed. We start with some factors

!L! and !U! obtained by removing "small" non-zero

elements during Gaussian elimination and use them to

precondition the system. Then one of three conjugate

gradients-type methods (ORTHOMIN, GMRES and CGS) can be

used. If the iterative process does not converge, then the

criterion used in the decision whether a non-zero element

is small or not is made more stringent and new factors are

calculated and used to precondition the system. This

process can, if necessary, be repeated several times. If

after a prescribed number of trials the iterative method

is still not convergent, then a switch is made to Gaussian

elimination. Thus, with regard to the accuracy

requirements the hybrid method is not worse than Gaussian

elimination. However, even more important is the fact that

the method is often less time and storage consuming than

Gaussian elimination. This is demonstrated by many

numerical examples (including the well-known

Boeing-Harwell test-matrices).

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

From: Mikko Tarkiainen <mcsun!sunic!tut!tukki!tarkiain@uunet.uu.net>

Date: 29 Jan 90 16:41:45 GMT

Second Announcement of the

CONFERENCE ON

NUMERICAL METHODS FOR FREE BOUNDARY PROBLEMS

July 23-27, 1990 in Jyvaskyla, Finland

TOPICS OF THE MEETING. The topics covered at the conference will be:

Free boundary problems in fluid mechanics, in hydrodynamics, in

mechanics, in ground freezing and in optimal shape design, capillary

free boundaries, shape memory problems, inverse and identification

problems, control of phase transition, solidification process, etc.

PARTICIPANTS. So far, among others, the following persons are

intending to attend:

Barbu, V. (Romania), Bossavit, A. (France), Chizikalov, V.A. (USSR),

Cuvelier, C. (The Netherlands), Fage, D. (USSR), Fasano, A. (Italy),

Gets, I. (USSR), Grossman, Ch. (DDR), Haslinger, J. (Czechoslovakia),

Hoffmann, K-H (BRD), Kaliev, I. (USSR), Kenmochi, N. (Japan),

Khludnev, A.M. (USSR), Knabner, P. (BRD), Kurtze, D.A. (USA),

Magenes, E. (Italy), Maximov, A. (USSR), Meirmanov, A. (USSR),

Mittelmann, H. (USA), Myslinski, A. (Poland), Niezgodka, M. (Poland),

O'Carrol, M.J. (USA), Paolini, M. (Italy), Primicerio, M. (Italy),

Rivkind, V. (USSR), Rogers, J.C.W. (USA), Sahm, P.R. (BRD),

Schulkes, R.M.S.M.(The Netherlands), Shemetov, N. (USSR),

Shopov, P.J. (Bulgaria), Verdi, C. (Italy).

REGISTRATION. Registration forms can be ordered from the address

below. Notice that the registration must be done before March 31, 1990.

A detailed program and abstracts of the lectures will be issued to

those attending. Registration forms should be sent to Professor Pekka

Neittaanm{ki. You may contact us also by email.

CONFERENCE FEE. The conference fee, which includes attendance at the

conference, conference material, refreshments during breaks, ship

cruise on Lake P{ij{nne and conference dinner, will be $ 100.

Participants especially from East and Southeast Europe may be given

some support for the conference fee and local expenses (travel in

Finland, living costs in Finland). Please inform us about required

financial support in the registration form.

ACCOMMODATION. Accommodation for the conference is available at the

Hotel Alba on the University campus. Also, student hotels are

available (2 km from the University). Please make the reservation for

the accommodation, including the dates, on the accommodation

registration form. If you want another hotel please inform us. If you

want to stay longer in Finland before or after the conference we can

help you to make reservations (hotels, summer houses, camping places,

etc.)

THIRD ANNOUNCEMENT including a preliminary conference program,

information on preparing the paper for the conference proceedings,

travel connections in Finland, etc., will be sent at the end of April

1990.

Prof. Pekka Neittaanmaki

University of Jyvaskyla

Department of Mathematics

Seminaarinkatu 15

SF-40100 Jyvaskyla, Finland

email: Neittaanmaki@finjyu.bitnet

tel.: (+358 41)602733

telefax: 358-41602701

telex: 28219 JYK SF

Mikko Tarkiainen e-mail: mtt@jylk.jyu.fi

Department of Mathematics tarkiain@tukki.jyu.fi

University of Jyvaskyla, Finland phone: +358 41 292715

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

From: Germund Dahlquist <dahlquis@nada.kth.se>

Date: Fri, 2 Feb 90 12:56:51 +0100

Third Annual Meeting of

SIAM NORDIC SECTION

June 26-27 1990

Stockholm, Sweden

SIAM Nordic Section was founded in 1987. The objectives of the section

are within the Nordic countries

- to further the application of mathematics to industry and science

- to promote basic research in mathematics leading to new methods and

techniques useful to industry and science

- to unite the community of researchers and graduate students in applied

mathematics

- to provide media for the exchange of information and ideas between

mathematicians and other technical and scientific personnel.

The first annual meeting was held in 1988 in Bergen, Norway, the second

one in Espoo, Finland.

All kinds of contributions of 25 minutes duration (including

discussion) are welcome, but presentations from doctoral students and

nonacademic organisations are especially invited.

Please send a title of your talk and an abstract (at most one page

long) before April 18, 1990.

At the SIAM Nordic Section Meeting The GOLUB PRIZE will be awarded for

the best contributed paper presented at the Section Meeting by a

student who is from a Nordic country and has not yet finished PhD. The

second Golub Prize was given to Rune Karlsson from Linkoping at the

1989 meeting in Helsinki.

In addition to the contributed talks, there will be a number of talks

by leading researchers from the Nordic countries.

There will be a registration fee of 200 Sw.Cr. For members of the SIAM

Nordic Section, 150 Sw.Cr. only.

Membership can be arranged at the meeting.

There will be no registration fee for graduate students from the

Nordic countries.

There will be a "Wine & Carrots" -party on Tuesday, June 26, at 5 p.m.

The local organizer of the meeting is the Department of Numerical

Analysis and Computing Science (NADA) at the Royal Institute of

Technology.

Housing has been arranged at a tourist class hotel, Hostel Frescati,

located at the University campus, about 5 km north of Stockholm

centre, while the meeting takes place at the Royal Institute of

Technology.

You can either have a nice (?) walk (less than 3 kms) or go by bus and

subway. The same bus can also bring you downtown in about 10 minutes.

Rates per night are 170 Sw Crs (about US$ 27) for a single room, 130

Sw Crs per person in a double room. The reception of the hotel is open

all the time There is an extra cost (30 Sw Crs) for linen unless you

bring linen yourself. Breakfast is not included but is served in a

Campus restaurant. If you want us to book a room for you on Hostel

Frescati, please send in the enclosed registration form as soon as

possible. Hotel prices in Stockholm are high, about 1000 Sw Crs for a

single room.

WELCOME TO THE MEETING!

For more information and questions, please contact:

Berit Gudmundson Germund Dahlquist

NADA NADA

K T H K T H

S-100 44 Stockholm S-100 44 Stockholm

Sweden Sweden

Tel. +46 (8) 790 8077 +46 (8) 790 7142

Email: dahlquis@nada.kth.se

P.S.

We like to mention that during the week June 18-22 there are two

Applied Mathematics meetings in the Nordic countries:

1) The 1990 Conference on Solution of Ordinary Differential Equations,

Helsinki, Finland (Register before April 30,1990)

Information from Prof Olavi Nevanlinna, Institute of Mathematics,

Helsinki University of Technology, 02150 Espoo 15, Finland

Email: mat-on@finhut.bitnet

2) The Householder Symposium XI Meeting in Numerical Algebra,

Tylosand,Sweden. (Deadline was Novenber 1, 1989)

Information from Prof Ake Bjorck, Dept of Mathematics,

Linkoping Univ, S-581 83 Linkoping, Sweden

So, if you decide to participate in one of the above meetings, you are

encouraged to extend your visit to the Nordic countries by attending

to the SIAM Nordic Section meeting. In between there is the famous

Nordic Midsummer Weekend, with midnight sun and all that + a Monday

for recovery.

By the way, there is also a great meeting in the week June 11-15:

3) 3rd International Conference on Hyperbolic Problems, Uppsala, Sweden

Information from Lena Jutestal, Dept of Scientific Computing,

Uppsala Univ, Stureg 4B, S-752 23 Uppsala, Sweden,

Email: lena@tdb.uu.se

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

From: Sven Hammarling <NAGSVEN%vax.oxford.ac.uk@nsfnet-relay.ac.uk>

Date: Mon, 29 Jan 90 18:04 GMT

FPV is a program which attempts to test the floating-point operations + - * /

sqrt, and comparisons .LT. .GT. etc., on a systematically chosen set of

operands. The code is written with all floating-point operations in loops that

will vectorise easily. It can test that the arithmetic is rounded according to

a number of rounding rules, including all the IEEE rules. There are currently

Fortran-77 and ISO standard Pascal versions of FPV. Unlike Paranoia though, FPV

is a commercial product. Anyone interested in receiving more information should

contact The Numerical Algorithms Group.

Sven Hammarling.

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

From: Andy Sherman <cs.yale.edu!topcat!sherman-andy@CS.YALE.EDU>

Date: 30 Jan 90 20:56:06 GMT

SCIENTIFIC Computing Associates, Inc. is pleased to announce the

availability of PCGPAK2, its new package of subroutines for the

iterative solution of large, sparse systems of linear equations.

PCGPAK2 offers a choice of solution methods based on a collection

of preprocessing, preconditioning, and iterative techniques

that includes some of the most robust and efficient methods known.

The entire package is written in portable Fortran 77, so it can be

easily merged with the large amount of existing scientific and

engineering software that depends on solving sparse linear systems.

Four basic iterative methods are available in PCGPAK2:

--- the conjugate gradient method (CG);

--- the generalized minimal residual method (GMRES(k));

--- ORTHOMIN(k);

--- the restarted generalized conjugate residual method (GCR(k)).

All of these are Krylov subspace methods that minimize a norm of the

residual error at each step. CG is applicable only to symmetric,

positive definite systems; the others are general methods designed

mainly for systems having nonsymmetric or non-positive-definite

symmetric coefficient matrices.

PCGPAK2 includes several options that can enhance the performance of the

basic iterative methods. Among these are:

1. Incomplete factorization preconditioning --

The system is preconditioned with an approximate factorization of the

coefficient matrix generated with sparse Gaussian elimination, ignoring

some or all of the fill-in. A levelparameter is used to control the

amount of fill-in that is neglected, and a relaxation parameter is

available to fully or partially preserve the matrix row sums.

2. Reduced system preprocessing --

A preprocessing step generates a smaller, denser system that is solved

using one of the preconditioned basic iterative methods.The solution to

the full system is recovered by postprocessing the solution to the

smaller reduced system.

3. Block iteration --

All of the methods in PCGPAK2 can exploit general block structure in the

coefficient matrix. This leads to iterative methods that are extremely

robust and natural for problems with underlying block structure arising

from geometric or modeling considerations. Both constant and variable

blocksizes are supported.

PCGPAK2 is applicable to a wide range of engineering and scientific

problems that depend on the solution of large sparse systems of linear

equations. Examples of application areas include structural engineering

analysis, aerodynamic and hydrodynamic modeling, oil reservoir

simulation, ocean acoustics, simulation of VLSI circuit designs and

combustion physics. For many problems, PCGPAK2 is substantially faster

and uses far less storage than alternative banded or sparse Gaussian

elimination methods. For example, on one relatively-small nonsymmetric

system of order 3969 arising from a nine-point discretization of an

elliptic partial differential equation on the unit square,

PCGPAK2 required less than one-fourth of the time and less than

one-fifth of the storage required by the band Gaussian elimination

routines from LINPACK. For larger two-dimensional and three-dimensional

partial differential equations, the savings are far greater.

The standard Fortran version of PCGPAK2 will run on essentially any

computer. Optimized versions of PCGPAK2 are available for a number of

vector machines, including the Cray 1, Cray XMP, Cray YMP, Cray 2, IBM

3090, Convex C-1, Convex C-2, and DEC VAX 9000.

For further information, contact SCIENTIFIC at

SCIENTIFIC Computing Associates, Inc.

246 Church Street, Suite 307

New Haven, CT 06510

Tel.: (203) 777-7442

FAX: (203) 776-4074

Email: sca@yale.edu or yale!sca

PCGPAK2 is a registered trademark of SCIENTIFIC Computing Associates, Inc.

Computers mentioned may be trademarks of their respective manufacturers.

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

From: Iain Duff <duff@antares.mcs.anl.gov>

Date: Sun, 28 Jan 90 16:32:16 CST

IMA JOURNAL OF NUMERICAL ANALYSIS

The contents of the current issue of the IMA Journal of Numerical

Analysis are given below.

IMA Journal of Numerical Analysis - Volume 10, Number 1

A Iserles Stability and dynamics of numerical methods

for non-linear ordinary differential

equations

M Z Liu and M N Spijker The stability of the i-methods in the

numerical solution of delay differential

equations

J Gilbert and W A Light Envelope solutions for implicit ordinary

differential equations

D Funaro Convergence analysis for pseudospectral

multidomain approximations of linear

advection equations

J Solar Vortex filament method

A Bellen, A Jackiewicz, Stability analysis of Runge-Kutta methods

R Vermiglio and for Volterra integral equations of the

M Zennaro second kind

R Coquereaux, A Grossmann Iterative method for calculation of the

and B E Lautrup Weierstrass elliptic function

H Brass Optimal estimation rules for functions of

high smoothness

N Dyn, D Levin and Data dependent triangulations for piecewise

S Rippa linear interpolation

The annual subscription rate for IMAJNA is $216 (120 pounds

outside North America and 92 pounds in UK), with a reduced rate

for members of the IMA of 38.50 pounds. There are four issues

(each of approximately 150 pages) each year. Note that it is now

possible to pay for IMA journals and IMA membership using major

credit cards.

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

From: Bob Plemmons <plemmons%matple@ncsuvx.ncsu.edu>

Date: Wed, 31 Jan 90 14:35:45 EST

Table of Contents

SIAM J. on Matrix Analysis and Applications

April 1990, Vol. 11 no. 2.

1. On Perhermitian Matrices

Richard D. Hill, Ronald G. Bates, and Steven R. Waters

2. A Matrix Approach to the Design of Low-Order Regulators

L.H. Keel and S.P. Bhattacharyya

3. Some 0-1 Solutions to the Matrix Equation A(m) - A(n) = I

Chi Fai Ho

4. Sets of Positive Operators with Suprema

W.N. Anderson, Jr., T.D. Morley, and G.E. Trapp

5. Algebraic Polar Decomposition

Irving Kaplansky

6. The Laplacian Spectrum of a Graph

Robert Grone, Russell Merris, and V.S. Sunder

7. Robust Stability and Performance Analysis for State Space Systems

via Quadratic Lyapunov Bounds

Dennis S. Bernstein and Wassim M. Haddad

8. On the Singular Values of a Product of Operators

Rajendra Bhatia and Fuad Kittaneh

9. Points of Continuity of the Kronecker Canonical Form

Immaculada de Hoyas

10. On Rutishauser's Approach to Self-Similar Flows

D.S. Watkins and L. Elsner

11. Incremental Condition Estimation

Christian Bischof

12. A New Algorithm for Finding a Pseudoperipheral Node in a Graph

Roger G. Grimes, Daniel J. Pierce, and Horst D. Simon

***Looking ahead -

The July and October issues will contain, in part, invited papers

from the Salishan, Oregon, Sparse Matrix Symposium held in 1989.

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

From: K. McKinnon <EFTM11%emas-a.edinburgh.ac.uk@nsfnet-relay.ac.uk>

Date: 01 Feb 90 10:07:38 gmt

UNIVERSITY OF EDINBURGH : DEPARTMENT OF MATHEMATICS

Lectureship in Mathematics

Particulars of Appointment

Applications are invited for a LECTURESHIP IN MATHEMATICS tenable in the

above Department. The appointment will commence on 1 October 1989 or at a date

to be decided between the department and the successful candidate.

The Department wishes to appoint an applied mathematician with strong

research interests. The ideal candidate will work in optimization theory or

numerical analysis, but strong candidates in other areas of applied

mathematics will be considered seriously. The successful candidate will have

the opportunity to interact fruitfully with the research groups in the

Department, and with other departments in the University.

There are three established chairs. The chair in Applied Mathematics is held

by D.F.Parker, whose interests include nonlinear wave propagation in solids

and optics. The other two are held by T.J.Lyons (currently Head of

Department) whose interests relate to probability theory, particularly in

analysis and geometry; and E.G.Rees whose interests are in topology and

geometry. There are five Readers, twenty four other teaching staff, two

computing officers and a number of other research workers. The interests of

the other teaching staff include optimization, numerical analysis, dynamical

systems, differential equations, analysis, probability, algebra, topology and

geometry.

The Department is responsible for teaching and research in Pure and

Applied Mathematics, and also runs (jointly with Heriot-Watt University) an

MSc course in Nonlinear Mathematics, supported by the SERC. There are separate

departments of Chemical, Electrical and Mechanical Engineering, Computer

Science, Statistics, Artificial Intelligence, Geology and Geophysics, as well

as a large Theoretical Physics group within the Department of Physics. The

Mathematics Department has strong links with the new Edinburgh-based

SERC-funded programme for the development of new techniques for design,

optimisation and control in the process engineering industries. The

Department is housed in the James Clerk Maxwell Building on the King's

Buildings site of the University, together with the combined mathematics

libraries of the University and of the Edinburgh Mathematical Society. There

are excellent computing facilities, including a 400-transputer parallel

processing facility and two Distributed Array Processors (DAPs), in the same

building. Edinburgh is an internationally recognised centre for parallel

computing.

In addition to research, duties would involve lecturing in Mathematics to

Honours and Ordinary Degree students and to postgraduate students, preparing

and attending tutorials, supervising undergraduates, examining, supervising

postgraduate students and assisting generally in the work of the Department.

The appointee is expected to join the Universities Superannuation Scheme

(USS), and to contribute 6.35% of annual salary, in which case the University

will contribute an additional sum equal to 18.55% of annual salary. The

current salary scales for lecturers A and B are 10,458 to 20,469 pounds.

The University is prepared to contribute towards removal expenses of staff

coming from other parts of the United Kingdom to Edinburgh on a first

appointment to an established post within the University, the full cost of any

reasonable vouched expenditure on removal of furniture and effects, including

insurance thereon, and the cost of fares of bringing the family to Edinburgh.

Claims in respect of travel etc from overseas will be considered on their

merits.

Applications (7 copies), including curriculum vitae and the names and

addresses of three referees, should be sent to Professor T.J.Lyons, Department

of Mathematics, Room 5320, JCMB, The King's Buildings, Edinburgh EH9 3JZ, not

later than 2nd March 1990. In the case of overseas candidates, later

applications may be considered. Such candidates need supply only one copy of

their application.

PLEASE QUOTE REFERENCE NUMBER 1486

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

From: Bo Kagstrom <BOKG%SEUMDC51.BITNET@Forsythe.Stanford.EDU>

Date: Thu, 1 Feb 90 13:09 EDT

Announcement of SWEDEN's first chair as Professor in

Computer Graphics and Visualization in Scientific Computing

at the University of Umea, Sweden (Reference number: Dnr 321-189-90)

Umea university is a young university that lies at the mouth of the

river Ume, equidistant from both the capital, Stockholm, and Sweden+s

most northerly town Kiruna. Today the campus has some 3 000 employees

and 11 000 students. The university has achieved prominence in many

fields, of which bio-technology, environmental ecology and information

technology are some of those in which now intensive activity is taking

place.

Expertise in the field of information technology in its broadest sense

is rapidily growing and in certain areas such as Scientific computing

great progress has already been made, and international collaboration

established, primarily with European and American researchers.

A couple of years ago a special action program for Information technology

- Scientific Computing was established at the faculty of Mathematical

and Natural Sciences. The program aims towards development of advanced

methods, algorithms and software in Scientific computing for different

parallel computer architectures.

The university is together with the Technical University of Lulea,

the Institute of Space Physics i Kiruna and the Industrial Development

Center in Skelleftea, founder of Supercomputer Center North (SDCN).

SDCN is one of two national centers for supercomputing in Sweden and

is connected to all swedish universities through the Swedish University

Network (SUNET). Thereby scientists have access to an IBM 3090-600 E/VF,

placed in Skelleftea, soon to be upgraded to a 600 J-model.

At the university we have a distributed-memory multiprocessor-system

Intel iPSC/2 hypercube with 64 nodes of which 16 nodes have a vector

facility and are about to aquire a shared-memory multiprocessor-system

with both high-performance computing power and advanced graphic

facilities for visualization.

Due to the partnership in SDCN Sweden+s first chair as professor in

Computer Graphics and Visualization in Scientific Computing is now

established at the university.

The field is very wide and interdisciplinary to its nature and candidates

for the chair can have different scientific profiles ranging from

research in tools and methods for Computer Graphics and Visualization

in Scientific Computing to graphics computing and visualization in

Scientific Computing with an emphasis on applications from biology,

biotechnology, chemistry, physics and medicine.

At the university we have applications/possible applications in for

instance biotechnology - molecular biology, chemometry, environmental

chemistry, geographical information systems, industrial design,

medicine, physical chemistry, psychology, theoretical physics and

space physics.

The professorship is placed at the department of Computing Science.

At the department there are professor chairs in numerical analysis,

computer science, and numerical analysis and parallel computing.

Since a couple of years there has been an intense development of knowledge

in the fields of parallel computing and environments and tools for

parallel computer architectures.

The university now announces a professorship in Computer Graphics and

Visualization in Scientific Computing as vacant, reference number

Dnr 321-189-90. Notice that the reference number must be mentioned on

the application!

To get started in this field as soon as possible the position can also

be a visiting professorship.

Send the application to Rektorsambetet, University of Umea, S-901 87 UMEA,

Sweden before the 30th of March 1990. Enclosed to the application should

be curriculum vitae, short summary of scientific and educational work,

and publications and ev. interest of a visiting professorship.

Questions will be answered by Professor Bo Kagstrom, Dept of Computing

Science, Umea University, S-901 87 Umea, phone +46-90165419,

email: bokg@biovax.umdc.umu.se (or na.kagstrom@na-net.stanford.edu)

or by Project coordinator Torbjorn Johansson, Supercomputer Center North,

Umea University, S-901 87 Umea, phone +46-90166585, email:

tojo@biovax.umdc.umu.se.

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

From: David Womble <dewombl@sandia.gov>

Date: 2 Feb 90 13:32:00 MST

(Please distribute this announcement to colleagues and

students who do not receive the NANET distributions.)

APPLIED MATHEMATICAL SCIENCES RESEARCH FELLOWSHIP

Mathematics and Computational Science Department

Sandia National Laboratories

Sandia National Laboratories is seeking outstanding

candidates in the areas of numerical analysis, scientific

computing, or symbolic computing to fill its 1990 Applied

Mathematical Sciences Research Fellowship. The Fellowship is

supported by a special grant from the Applied Mathematical

Sciences Research Program at the U.S. Department of Energy.

The Fellowship is intended to provide an exceptional

opportunity for young researchers. Sandia's Mathematics and

Computational Science Department maintains strong programs in

theoretical computer science, analytical and computational

mathematics, computational physics and engineering, advanced

computational approaches for parallel computers, graphics, and

architectures and languages. Sandia provides a unique parallel

computing environment, including a 1024-processor NCUBE 3200

hypercube, a 1024-processor NCUBE 6400 hypercube, a Connection

Machine-2, and several large Cray supercomputers. The successful

candidate must be a U.S. citizen, must have earned a Ph.D. degree

or the equivalent, and should have a strong interest in advanced

computing research.

The fellowship appointment is for a period of one year, and

may be renewed for a second year. It includes a highly

competitive salary, moving expenses, and a generous professional

travel allowance. Applications from qualified candidates, or

nominations for the Fellowship, should be addressed to Robert

H. Banks, Division 3531-24B, Sandia National Laboratories, P.O.

Box 5800, Albuquerque, NM 87185. Applications should include a

resume, a statement of research goals, and the names of three

references. The closing date for applications is April 30, 1990.

The position will commence during 1990. Further inquiries can be

made by calling (505) 844-2248 or by sending E-mail to

RCALLEN@SANDIA.GOV.

Equal Opportunity Employer M/F/V/H

U.S. Citizenship is Required

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

End of NA Digest

**************************

-------