NA Digest Friday, February 13, 1987 Volume 87 : Issue 2

This weeks Editor: Gene Golub

Today's Topics:

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Date: Mon, 2 Feb 87 16:14:44 PST
From: Mark Kent <kent@navajo.stanford.edu>
Subject: na.lastname status message II
To: na@score.stanford.edu

(These messages will not become a regular thing.)

Two new improvements have been installed that should improve
reliability.

1) In the past the na.lastname messages were shipped out of Stanford
from a Vax called Navajo. Quite a few messages were going nowhere
because Navajo had trouble either opening connections with hosts
or maintaining a connection long enough to get the mail through.
This is probably caused by increased arpanet traffic and lack of
flexibility in certain parameters in the mail system. I have noticed
that other Unix systems have encountered the same problem recently.

Score, a Dec-20, has better luck with out-going messages. Maybe
this is because Score has a direct arpanet connection. Now, all
NAnet messages (both broadcast and individual) go through Score.
(Score also seems more forgiving with addresses.)

2) Previously, messages were shipped out as if the sender was
daemon@navajo. This caused some troubles as people could not
conveniently use the "reply" command to such messages. Also,
messages sent to na.netlib@score.stanford.edu would seem to get
no reply. As it turns out, the mailbox for daemon@navajo was
collecting replies from netlib. The daemon was also collecting
mail errors for things further down the line. So if you sent
a message to na.xxxx and the corresponding address was unreachable
for 5 days then you would never know it.

This has been fixed. You should now get error messages as if
you had typed the real address rather than the na.lastname address.
Hence, if some host is down and your message cannot get through
then you will know it.


Unfortunately, while I was installing these changes the database
for the na.lastname facility was somehow garbled. In fact it was empty.
So some of you may have got messages like
"na.someone not recognized"

The database has been fixed and everything should work from now on.

-mark

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

From: wmgentleman%watbun%math%math.waterloo.edu@RELAY.CS.NET
To: na.dis@SU-SCORE.ARPA
Date: Sun, 1 Feb 87 23:46:01 EST
Subject: Mathematics Editors

When I gave my talk "Impact of Microprocessors in Numerical Computation"
at the SIAM Seattle meeting in 1984, the last point I made was that
perhaps the most important thing microcomputers would eventually be seen
to have contributed to numerical analysts and other mathematicians would
be the ability to write mathematical notation directly to a screen, giving
the same advantages of "electric paper" that word processing brought to
composing ordinary text documents.
I would like to rave about a program that I have been using the last couple
of weeks with my Macintosh that, though it isn't quite all the way to what
I had in mind, is a quantum leap beyond anything else I have seen. The
program, Mathwrite, by Cooke Publications in Ithaca, NY, has been advertised
in the last couple of issues of MacWorld. It is a full screen WYSIWYG editor
for mathematics, that is, the expressions on the screen look just like those
printed on the pages of textbooks or journals, with Greek and other symbols,
point size differences, etc.
There are two aspects that are important to something like this: first, is it
rich enough to represent all, or at least the vast majority of the notation
you would like to use, and second, can it do this easily enough that there is
some hope you might actually derive the mathematics on the screen, and not
just transcribe into a typesetting system formulae and equations that you
derived the old-fashioned way on paper. The answer, for me, to the first
aspect is yes, this program could represent not just any formula I have ever
included in a paper I published, but any formula I have ever written in my
private notes when deriving results. For the second aspect, the answer is that
it is close but not there. I find it very easy to enter expressions - while
teaching myself the program I did the last five examples, which include messy
integral, matrix, and partial derivative expressions, in less than 45 minutes.
I even found typos in the originals while doing it. Altogether as big an
advance over document compilers like eqn and tex as they are over typeballs
and lectraset. However I found that editing expressions that already have
been entered still leaves much to be desired.

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

Date: Wed, 04 Feb 87 10:27:20 cet
To: NA@SU-SCORE.ARPA
From: AIHDM@ASUACAD.BITNET
Subject: sabbatical planning

an experienced numerical analyst from germany would like to spend a
sabbatical leave in the u.s. preferably not in a university environment
but in a research lab in industry (although the first is possible).
times are march-september 1988 or august 88 - february 1989. he looks
for a contract that requires him to work full-time equivalent but the
pay has to be limited. he has extensive (consulting) experience, areas
include 1. stiff ode's, 2. formula manipulation, 3. ill-posed problems,
4. fast elliptic solvers, 5. parallel algorithms applied to 3. and 4..
if you can suggest places to contact i will forward this information
to him.
hans mittelmann, arizona state university, dept. math., tempe, az 85287.

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

Mail-From: GOLUB created at 4-Feb-87 14:50:21
Date: Wed, 4 Feb 87 14:47:13 CST
To: <NA.GOLUB@SCORE.STANFORD.EDU>
From: <SL.VAS@isumvs.bitnet>
ReSent-Date: Wed 4 Feb 87 14:50:20-PST
ReSent-From: Gene H. Golub <GOLUB@Score.Stanford.EDU>
ReSent-To: na@Score.Stanford.EDU

SUBJECT : INQUIRY

FROM : V.A.SPOSITO (SL.VAS@ISUMVS)

WHO CAN GIVE ME INFORMATION REGARDING (ALL) AVAILABLE SOFTWARE
(PUBLIC,PURCHASE OR LEASE) FOR SOLVING LARGE-SCALE LINEAR PROGRAMMING
PROBLEMS; ALSO FOR NONLINEAR PROGRAMMING PROBLEMS ?

INFORMATION REGARDING ANY VECTORIZED VERSIONS OF THESE SOFTWARE
PACKAGES WOULD ALSO BE APPRECIATED.

V.A.SPOSITO, DEPT. STATISTICS.,IOWA STATE UNIV.,
AMES, IOWA 50011

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

Date: Wed, 4 Feb 87 13:20:21 EST
From: pitt45!wcr%pitt@csnet-relay%pitt
To: NA@SU-SCORE.ARPA
Subject: Office phone

The phone system on our campus has been changed. From now on
my office phone number is
(412)-624-8381

Werner Rheinboldt
University of Pittsburgh

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

Date: Thu, 5 Feb 87 08:23:44 CST
To: <NA@SU-SCORE.ARPA>
From: <SL.VAS@ISUMVS.BITNET>

WHO IS JIM GENTLE?

BEEN TRYING TO CONTACT YOU VIA THIS NETWORK.
SEND ME YOUR PASSWORD.

VINCE (SL.VAS@ISUMVS.BITNET)

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

Date: Thu, 5 Feb 87 08:25:12 CST
To: <NA@SU-SCORE.ARPA>
From: <SL.VAS@ISUMVS.BITNET>

WHO IS MIKE HAND?

BEEN TRYING TO CONTACT YOU VIA THIS NETWORK.
SEND ME YOUR PASSWORD.

VINCE (SL.VAS@ISUMVS.BITNET)

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

Mail-From: GOLUB created at 5-Feb-87 10:08:15
Date: Thu, 5 Feb 87 09:28:52 CST
From: wmiller@umn-cs (Dr. Willard Miller)
To: golub@score.stanford.edu
ReSent-Date: Thu 5 Feb 87 10:08:14-PST
ReSent-From: Gene H. Golub <GOLUB@Score.Stanford.EDU>
ReSent-To: na@Score.Stanford.EDU

INSTITUTE FOR MATHEMATICS AND ITS APPLICATIONS
UNIVERSITY OF MINNESOTA
514 Vincent Hall
206 Church Street S.E.
Minneapolis, Minnesota 55455
(612)624-6066



WORKSHOP ON CONSTITUTIVE EQUATIONS AND MODELING OF
DISTRIBUTED CRACKING, STRAIN SOFTENING, AND LOCALIZATION

February 16-18, 1987

This workshop is made possible by grants from the
Army Research Office and the National Science Foundation

Tentative Program

Monday, Feb 16 :

8:30 - 9:30 am Z.P. Bazant "Problems and Recent Advances in Continuum
Northwestern Univ. Modelling of Softening Damage"

9:30 - 10:15 am I. Vardoulakis "Experimental Observations with Respect
Univ. of Minnesota to Strain-Softening and Localization
in Granular Media"

10:30 - 11:30 am Discussion

1:00 - 1:45 pm J.D. Dougill "A Distributed Damage Model and Some
Imperial College Possible Extensions"

1:45 - 2:30 pm K. William "Stabilization and Control of Associated
Univ. of Colorado and Non-Associated Strain-Softening
Computations"

2:30 - 3:15 pm J.H. Prevost "Constitutive Equations for Soil"
Princeton Univ.
3:30 - 5:00 pm Discussion


Tuesday, Feb 17 :

8:30 - 9:15 am A. Needleman "Finite Element Analysis of Failure
Brown Univ. Modes in Ductile Solids"

9:15 - 10:05 am M.A. Crisfield "Some Experiences with Finite Element
Transport & Road Analyses of Softening Materials"
Research Lab

10:30 - 11:30 am Discussion

1:00 - 1:45 pm R. de Borst "Computational Issues Regarding the
Univ. of New Mexico Solution of Boundary Value Problems
with an Indefinite Stiffness Matrix"

1:45 - 2:30 pm M. Ortiz "Finite Element Analysis of
Brown Univ. Localized Failure"

3:00 - 4:30 pm Discussion

Wednesday, Feb 18:

8:30 - 9:15 am H.L. Schreyer "Mathematical Formulation and
Univ.ofNewMexico Problems Associated with Strain-
Softening and Localization Based on
Nonlocal Plasticity"

9:15 - 10:00 am R.D. James "Prediction of the Microstructures
Univ.ofMinnesota of Solids which Arise from a Phase
Transformation"

10:30 - 11:30 Discussion

1:00 - 1:45 M. Shearer "Conservation Laws of Mixed Type
North Carolina State Arising in Elasticity and Porous
University Media Flow"

1:45 - 2:30 pm E. Aifantis "Plastic Heterogeneity: Instabilities,
Mich. Tech. Univ. Dislocations, and Deformation Bands"

3:00 - 4:30 pm Discussion

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

Date: Thu, 5 Feb 87 14:42:47 pst
From: Alan J. Laub <ucsbcsl!laub@ucbvax.Berkeley.EDU>
Posted-Date: Thu, 5 Feb 87 14:42:47 pst
To: na@SCORE.STANFORD.EDU
Subject: notice of NATO ASI


NATO ADVANCED STUDY INSTITUTE (ASI)

"THE APPLICATION OF ADVANCED COMPUTING CONCEPTS AND TECHNIQUES
IN CONTROL ENGINEERING"

SEPTEMBER 14-25, 1987
IL CIOCCO, TUSCANY, ITALY


AIM: This ASI is intended to bring together both academic
and industrial control systems engineers who are active or
who wish to become active in the application of advanced
computing concepts and techniques in the design and imple-
mentation of control systems. The main areas to be covered
in the Institute lie at the interface between computer sci-
ence and control and include:

* expert systems in design and implementation of control
systems

* control of distributed and discrete event processes

* parallel computing algorithms and architectures for
control and signal processing

A series of tutorial-level lectures will be presented by
invited lecturers in each of these main areas while a few
research-level contributions will be presented as short
papers by selected participants.

MAIN LECTURERS: The main lecturers for the Institute will
include: K.J. Astrom (Lund), G. Blankenship (Maryland), G.
Cybenko (Tufts), M.J. Denham (Kingston Polytechnic), A.J.
Laub (UC Santa Barbara), E.H. Mamdani (Queen Mary College),
J.P. Quadrat (INRIA), A.H. Sameh (Illinois), P. VanDooren
(Philips), and W.M. Wonham (Toronto)

FEES: The attendance fee of $600 includes accommodation and
all meals for the duration of the Institute (13 nights) and
transportation to and from Pisa airport.

DIRECTORS: The co-directors of the Institute are:
Professor Michael J. Denham Professor Alan J. Laub
Kingston Polytechnic Dep't. of Electrical and
Kingston upon Thames Computer Engineering
KT1 2EE University of California
England Santa Barbara, CA 93106
Tel. (44) (1) 549-1366 Tel. (1) (805) 961-3616

APPLICATIONS: Attendance is by personal invitation only.
Further details and application forms are obtainable from
the above. Please note that Professor Denham will be at the
Santa Barbara address until Apr. 1, 1987. To ensure full
consideration by the organizing committee, applications
should be submitted by May 15, 1987 at the latest.

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

Mail-From: GOLUB created at 6-Feb-87 08:05:21
Date: Fri 6 Feb 87 08:05:21-PST
From: Gene H. Golub <GOLUB@Score.Stanford.EDU>
Subject: At last
To: NA@Score.Stanford.EDU

At last, you can send msgs to John Butcher in New Zealand. He has
about the longest address known to man! But you can avoid his complicated
address by sending to na.butcher@stanford.score.edu.

Welcome to the WORLD, John.

Gene

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

Date: 2 Feb 1987 13:15:09 GMT
To: NA <@Cs.Ucl.AC.UK:NA@score.stanford.edu>
Subject: Lectureship at Bath
From: Alastair Spence <ma_as%ux63.bath.ac.uk@Cs.Ucl.AC.UK>




UNIVERSITY OF BATH,U.K.

SCHOOL OF MATHEMATICAL SCIENCES

LECTURER IN APPLIED MATHEMATICS


Applications are invited for the above post in the
Mathematics group of the School of Mathematical Sciences,
which is tenable from 1st. September 1987.

The successful candidate will be expected to have interests
which are compatible in broad terms with existing research
activities in continuum mechanics, which relate mainly to
solid mechanics and aspects of wave propagation, though
expertise in mechanics of suspensions or the numerical
solution of partial differential equations would be
welcome.

Duties will include teaching to students within the School
of Mathematical Sciences and in other Schools where a
substantial service teaching commitment exists.

Particular emphasis will be placed however on the successful
candidate's achievements and potential in research.

Salary in the range 8,020 - 15,700 UK pounds.
All lectureships are subject to a probationary period
of three years.

Closing date : 25th. February 1987.

Further particulars from:

Professor J R Willis,
School of Mathematical Sciences,
University of Bath,
BATH, BA2 7AY
U.K.

UK Telephone: 0225 826184 (School Office)
0225 826241 (Professor Willis)

or

Alastair Spence on NANET: na.spence@su-score

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

Date: Fri, 06 Feb 87 15:16 EST
From: AUGENBAU@UCONNVM
Subject: Public Domian Macsyma
To: NA.DIS@SU-SCORE.ARPA

I have been told that there is a DOE public domain version of Maacsyma
around. I would appreciate if anyone could give some information on this.
reply to:
augenbau@uconnvm.bitnet
or na.augenbaum@su-score.arpa

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

Date: Fri, 6 Feb 87 14:55:29 CST
From: wmiller@umn-cs.arpa (Dr. Willard Miller)
To: na@score.stanford.edu

INSTITUTE FOR MATHEMATICS AND ITS APPLICATIONS
UNIVERSITY OF MINNESOTA
514 Vincent Hall
206 Church Street S.E.
Minneapolis, Minnesota 55455
(612)624-6066



WORKSHOP ON CONSTITUTIVE EQUATIONS AND MODELING OF
DISTRIBUTED CRACKING, STRAIN SOFTENING, AND LOCALIZATION

February 16-18, 1987

This workshop is made possible by grants from the
Army Research Office and the National Science Foundation

Tentative Program

Monday, Feb 16 :

8:30 - 9:30 am Z.P. Bazant "Problems and Recent Advances in Continuum
Northwestern Univ. Modelling of Softening Damage"

9:30 - 10:15 am I. Vardoulakis "Experimental Observations with Respect
Univ. of Minnesota to Strain-Softening and Localization
in Granular Media"

10:30 - 11:30 am Discussion

1:00 - 1:45 pm J.D. Dougill "A Distributed Damage Model and Some
Imperial College Possible Extensions"

1:45 - 2:30 pm K. William "Stabilization and Control of Associated
Univ. of Colorado and Non-Associated Strain-Softening
Computations"

2:30 - 3:15 pm J.H. Prevost "Constitutive Equations for Soil"
Princeton Univ.
3:30 - 5:00 pm Discussion


Tuesday, Feb 17 :

8:30 - 9:15 am A. Needleman "Finite Element Analysis of Failure
Brown Univ. Modes in Ductile Solids"

9:15 - 10:05 am M.A. Crisfield "Some Experiences with Finite Element
Transport & Road Analyses of Softening Materials"
Research Lab

10:30 - 11:30 am Discussion

1:00 - 1:45 pm R. de Borst "Computational Issues Regarding the
Univ. of New Mexico Solution of Boundary Value Problems
with an Indefinite Stiffness Matrix"

1:45 - 2:30 pm M. Ortiz "Finite Element Analysis of
Brown Univ. Localized Failure"

3:00 - 4:30 pm Discussion

Wednesday, Feb 18:

8:30 - 9:15 am H.L. Schreyer "Mathematical Formulation and
Univ.ofNewMexico Problems Associated with Strain-
Softening and Localization Based on
Nonlocal Plasticity"

9:15 - 10:00 am R.D. James "Prediction of the Microstructures
Univ.ofMinnesota of Solids which Arise from a Phase
Transformation"

10:30 - 11:30 Discussion

1:00 - 1:45 M. Shearer "Conservation Laws of Mixed Type
North Carolina State Arising in Elasticity and Porous
University Media Flow"

1:45 - 2:30 pm E. Aifantis "Plastic Heterogeneity: Instabilities,
Mich. Tech. Univ. Dislocations, and Deformation Bands"

3:00 - 4:30 pm Discussion

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

Date: Wed, 4 Feb 87 16:49:20 GMT
From: trh%ukc.ac.uk@Cs.Ucl.AC.UK
To: na.dis@score.stanford.edu
Subject: SHARE classification

Can anyone give me a reference to the original source of the
Modified SHARE Classification Index (or why linear equation algorithms
appearing in TOMS are tagged F04)? I seem to remember hearing
that George Forsythe was responsible but I can't find anything
in print.

Thanks in advance,

--
Tim Hopkins,
Computing Laboratory,
University of Kent,
Canterbury CT2 7NF
Kent
U.K.

{ trh@ukc.UUCP
trh%ukc@ucl-cs.ARPA
na.hopkins@su-score.ARPA }

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

Date: Mon, 9 Feb 87 15:13:37 EST
From: luk@think.com (frank luk)
To: na.dis@score.stanford.edu
Subject: Temporary Address

I am spending the spring semester at the Thinking Machines Corp.
My address and phone are

Thinking Machines Corp.
245 First Street
Cambridge, MA 02142-1214

617-876-1111

luk@think.com

Frank Luk

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End of NA Digest

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