**Today's Topics:**

- New Editors for LAA
- Re-orthonormalization
- Signal Processing Workshop at Cornell
- Position at Manchester
- Defense University Research Instrumentation Program
- ANSI C Deadline Nears
- Third Parallel Circus
- SVD software in Pascal or C

From: Hans Schneider <hs@vanvleck.math.wisc.edu>

Date: Mon, 21 Mar 88 11:32:38 cst

Linear Algebra and its Applications is pleased to announce the

appointment of three new associate editors:

Daniel Hershkowitz Roger A. Horn Leiba Rodman

Mathematics Dept Dept of Math Sciences Mathematics Dept

Technion Johns Hopkins Univ College of William

Haifa 32000 Baltimore Md 21218 and Mary

Israel USA Williamsburg Va 23185

USA

Manuscripts (in duplicate) may be submitted to any member of the

editorial board, including the editors named above.

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

From: John G. Aspinall <JGA@allegheny.scrc.symbolics.com>

Date: Tue, 22 Mar 88 10:03 EST

I have an NxN real orthonormal matrix representing an orientation in

N-space. Some assorted floating point operations on it (e.g. I've been

multiplying several of them together) have left it slightly

non-orthonormal.

I seek suggestions and references to re-orthonormalizing the matrix;

something better than Gram-Schmidt orthonormalization (which imposes a

preferential order on the columns/rows), perhaps iterative, preferably

converging on the "nearest" (in some norm) orthonormal matrix.

John Aspinall < JGA@Stony-Brook.SCRC.Symbolics.com >

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

From: Frank Luk <luk@tesla.ee.cornell.edu>

Date: Wed, 23 Mar 88 12:11:03 EST

The Army Research Office, through the Cornell Mathematical Sciences

Institute, will sponsor a Workshop on Matrix-based Signal Processing

Algorithms and Architectures in Ithaca for three days ( June 27-29, 1988 ).

A preliminary list of scientists and engineers who have accepted

our invitation to speak at the Workshop is given below.

1. Sidney Burrus Rice University

2. Patricia Eberlein SUNY at Buffalo

3. Simon Haykin McMaster University

4. Mostafa Kaveh University of Minnesota

5. Marek Kowalski University of Utah and University of Warsaw

6. H.T. Kung Carnegie-Mellon University

7. Monica Lam Carnegie-Mellon University

8. John McWhirter Royal Signal and Radar Establishment

9. Charles Rader Lincoln Lab.

10. John Rice Purdue University

11. Robert Schreiber SAXPY Corp.

12. Jeffrey Speiser Naval Ocean Systems Center

13. G.W. Stewart University of Maryland

14. Donald Tufts University of Rhode Island

For further information, please contact either Adam Bojanczyk or

Franklin Luk at adamb@tesla.ee.cornell.edu luk@tesla.ee.cornell.edu

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

From: Ian Gladwell (Manchester) <igladwel@nss.cs.ucl.ac.uk>

Date: Thu, 24 Mar 88 14:55:03 GMT

UNIVERSITY OF MANCHESTER

DEPARTMENT OF MATHEMATICS

Applications are invited for a

TEMPORARY LECTURESHIP in NUMERICAL ANALYSIS.

The post is tenable from October 1st 1988 for 12 months. The salary

will be in the range UK pounds 9260 - 11680.

The post is open to candidates with good qualifications and research

experience in Numerical Analysis. Preference will be given to those

with some experience of lecturing or demonstrating.

Further particulars and application forms should be obtained from the

Registrar, University of Manchester, Manchester M13 9PL, England (Tel.

061 275 2028), to whom applications should be returned by April 22nd.

Informal enquiries may be made to Professor J. Walsh, Department of

Mathematics (Tel. 061 275 5800).

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

From: Arthur Wouk <wouk@BRL.ARPA>

Date: Fri, 25 Mar 88 13:31:48 EST

The DoD has announced the FY88 University Research Instrumenta-

tion Program (DURIP). DURIP is a hardware support program for

universities to upgrade their equipment, including computers and

associated hardware. $25 million is to be awarded. Awards will

be made by ARO, AFOSR, DARPA and ONR. Deadline for proposals is

5:00 pm, Tuesday, May 31, 1988. A portion of the money ($3.5 mil-

lion) is specifically restricted to institutions in either of

two categories: (1) historically Black colleges and universities

and other minority institutions, and (2) academic institutions

that received less than $10 million per year in federal funds in

either FY85 or FY86.

In the past awards have averaged $135,000; few proposals over

$500,000 were funded.

For a copy of the full announcement you may call Jean Tigges,

Secretary, Math. Sciences Division, ARO at 919-549-0641, or call

or write to your favorite contact at one of the agencies listed

above. Please do not call me, since I have already given you all

that I could tell you over the phone.

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

From: David Hough <dgh@Sun.COM>

Date: Fri, 25 Mar 88 19:33:09 PST

I have been advised that the public review period for the ANSI C draft dated

11 January 1988 is drawing to a close soon, so I plan to finish up my

commentary Monday and mail it to CBEMA on Tuesday 29 March.

Any of you planning your own submissions should send them in as soon as

possible, and in any event no later than April 15.

Let me know if you would like electronic copies of my submission -

it requires tbl, nroff, and -ms macros.

I encourage you to copy or adapt any parts of it that appeal to you in your

own responses. Neither reading the draft standard nor my commentary

is a 15-minute job, however.

ANSI C or something like it will probably be the common language of CS

graduates during the next decade, so it behooves numerical people

to make their objections known. Most numerical people find plenty

to object about in traditional C implementations.

Many people consider the current X3J11 draft unacceptable;

many others are in a hurry to approve this draft

or anything close as soon as possible.

If there are numerous substantial objections then there may well have

to be another major public review cycle; the preparation for that may

well permit consideration of major changes. This has positive and

negative aspects. If you have feelings one way or the other it

would be worthwhile to express them.

The address for commentary is:

ANSI X3J11 Secretariat

CBEMA, Suite 500

311 First St NW

Washington, DC 20001

The following is the abstract of my submission:

The proposed C standard suffers numerical

shortcomings - many inherited from its precursors

- in areas of interest to providers of portable

mathematical software. I comment in detail upon

the following aspects of the proposed standard:

Comment #1, Section 1.1: anticipate supplemental standards

Comment #2, Section 1.1: manifest the best way

Comment #3, Section 2.2.4.2: exclude implementations explicitly

Comment #4, Section 2.2.4.2: use "significand"

Comment #5, Section 3.1.3.1: bound rounding errors explicitly and uniformly

Comment #6, Section 3.2.1.4: round conversions between floating types

Comment #7, Section 3.2.1.5: forbid implicit narrowing conversions

Comment #8, Section 3.3.3: add power or square operator for integral exponents

Comment #9, Section 3.3.4: emphasize rounding forced

Comment #10, Section 3.4: defer constant expressions with side effects

Comment #11, Section 3.5.6: encourage non-zero initialization

Comment #12, Section 4.7: SIGFPE means floating point

Comment #13, Section 4.8 variable argument lists are expensive

Comment #14, Section 4.9.6: printf/scanf duality for non-model numbers

Comment #15, Section 4.9.6.1: display signed zero with printf %+

Comment #16, Section 4.9.6.1: distinguish exact zero with printf %f

Comment #17, Section 4.9.6.1: provide useful printf %#g

Comment #18, Section 4.9.6.2: scanf requires more than minimal ungetc

Comment #19, Section 4.10.1.4: strtod/atof are mathematical functions

Comment #20, Section 4.10.2: require two random number generators

Comment #21, Section 2.2.4.2: <float.h> has too many names, not enough information

Comment #22, Section 2.2.4.2: long double > minimal float

Comment #23, Section 3.1.3.1: compiler conversion same as run-time

Comment #24, Section 3.3.2.2: no implicit declarations

Comment #25, Section 3.5.4.2: fix arrays

Comment #26, Section 3.7.1: standardize Fortran-77 interface

Comment #27, Section 3.8.8: predefine generalized precision macros

Comment #28, Section 4.5: specific mathematical library functions

Comment #29, Section 4.13.4: standard functions predefine generic operators

Comment #30, Section 4.5.1: make numerical exception handling uniform

Appendix #1: A Proposal for Conformant Arrays

Appendix #2: A Proposal for <float.h>

Appendix #3: Why does traditional C treat float the way it does?

The following comments are based upon Draft Proposed

American National Standard for Information Systems - Pro-

gramming Language C, document number X3J11/88-002, dated 11

January 1988, and its accompanying Rationale. The comments

are personal opinions of the author, and should neither be

construed as wholly original nor as representing the posi-

tion of any organization or other person. A number of indi-

viduals helped formulate and clarify them.

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

From: Gene Golub <golub@golubsun.cs.umd.edu>

Date: Sat, 26 Mar 88 15:26:18 EST

Third Parallel Circus

IBM Kingston, NY, May 6-7, 1988.

This is an informal gathering of researchers interested in the practice

and theory of parallel processing. The intention is to engage in

discussions about work in progress or recently completed work, and

exchange ideas for future work.

The first Parallel Circus was held in May 1987 at Yale (chaired by Prof.

M. Schultz) and the second at Cornell in November 1987 (chaired by Prof.

C. Van Loan). IBM Kingston was proposed as the site for the third Circus

because it is within comfortable driving distance of a number of universities

in the Eastern U.S. Profs. Gene Golub and Martin Schultz have consented

to be joint chairmen for the Third Parallel Circus.

A suggestion made at the previous Circus was that one session at the Circus

should have well defined focus within the broad field of parallel processing.

For the session chaired by Prof. Golub, the focus is on parallel processing

pertaining to computational techniques in linear algebra.

The atmosphere is completely casual, and the schedule of speakers is

determined by drawing names out of a hat at the beginning of the Circus.

It has been customary for the Circus to be held on Friday and Saturday

so as to cause minimal disruption to working schedules.

Please call Vijay Sonnad at 914-385-0266 if you wish to attend. If you

prefer to write, the address is: Mail Stop 428, IBM Corporation, Kingston,

NY 12401.

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

From: Himadri Das <uvaarpa!hudson!gibbs!dh4v@mcnc.org>

Date: 25 Mar 88 21:16:06 GMT

I am posting this on behalf of a friend of mine who does not have access

to the net.

She is looking for Pascal routines for calculating the singular value

decomposition of a matrix. If no Pascal routines are available,

information on C routines would be appreciated.

Please send e mail to the following BITNET address : HD7Q@VIRGINIA

Or else please write to or call Karen Bofinger at:

Karen Bofinger

Department of Chemical Engineering

Thornton Hall

University of Virginia

Charlottesville, VA 22901

Phone: (804)-924-6287

Thanks!

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End of NA Digest

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