From na-net@patience.stanford.edu Sun Mar 18 11:28:35 1990 Received: from crfsun.EPM.ORNL.GOV by cs.utk.edu with SMTP (5.61++/2.3-UTK) id AA29080; Sun, 18 Mar 90 11:28:24 -0500 Received: from msr.epm.ornl.gov by crfsun.EPM.ORNL.GOV (4.1/1.34) id AA07204; Sun, 18 Mar 90 11:28:03 EST Received: from beauty.Stanford.EDU by msr.epm.ornl.gov (5.61/1.34) id AA02494; Sun, 18 Mar 90 11:26:54 -0500 Received: from patience.stanford.edu by beauty.stanford.edu (4.0/inc-1.5) id AA25185; Sun, 18 Mar 90 08:20:02 PST Received: from bravery.stanford.edu by patience.stanford.edu (4.0/inc-1.5) id AA11618; Sun, 18 Mar 90 07:47:57 PST Received: by bravery.stanford.edu (4.0/inc-1.5) id AA13299; Sun, 18 Mar 90 07:52:59 PST Date: Sun, 18 Mar 90 07:52:59 PST From: na-net@patience.stanford.edu Message-Id: <9003181552.AA13299@bravery.stanford.edu> Return-Path: Subject: NA-NET distribution message Maint-Path: maintainer@na-net.stanford.edu To: na-net@patience.stanford.edu Reply-To: na-net@patience.stanford.edu Comment: requests, comments or problems to nanet@na-net.stanford.edu Comment: submissions to na@na-net.stanford.edu Status: R Received: from matlab.UUCP by mathworks.com (4.0/SMI-3.2) id AA03588; Sat, 17 Mar 90 15:33:45 PST NA Digest Sunday, March 18, 1990 Volume 90 : Issue 11 Today's Editor: Cleve Moler Today's Topics: More on Pronunciation of Lanczos More on Pronunciation of Cholesky Access to IEEE Exceptions Jaccard Metric Positions at ICASE Positions at Texas A&M ------------------------------------------------------- From: Gene Golub Date: Sun, 11 Mar 1990 11:10:33 PST Subject: More on Pronunciation of Lanczos At any meeting where I attempt to pronounce Lanczos, there is always a Hungarian who corrects my pronunciation. It might be easiest to call Lanczos by his original name: Loewy. He changed his name because of the repressive situation in Hungary in the '20's. By the way, Lanczos would have been 100 years old in 1993. Isn't it appropriate that the numerical analysts hold a meeting in his honor? I'm sure other scientists will hold a meeting but that usually means our interests are pushed aside as was evidenced by the recent meetings dedicated to Von Neumann and Gauss. Gene ------------------------------ From: George Ostrouchov Date: Fri, 16 Mar 90 12:10:31 EST Subject: More on Pronunciation of Cholesky It is not clear which of three possibilities is the correct pronunciation of Cholesky. If the name is of Russian origin, there is a possibility for three pronunciations: 'T-sholesky', 'Sholesky', and 'Kholesky'. Each of these reflects a possible first letter of the name in the Cyrillic alphabet. (Unfortunately two of these possible Cyrillic letters do not look like any Latin letters so I cannot include them here.) All three of these would likely be transliterated into the Latin alphabet in French as Cholesky. If the name is of Polish origin (this is less likely because of the 'y' ending), it would not need to be transliterated because Polish uses the Latin alphabet (with a few small exceptions). The correct pronunciation would then be 'Kholesky', as Cholesky is pronounced in Polish. Until we find out what Major Andre-Louis Cholesky preferred or the exact origin of his name, all three current pronunciations seem acceptable. George Ostrouchov, Oak Ridge National Laboratory (pronounced 'Ost-rou-khov' -- Octpoyxob ) ost@ostsun.epm.ornl.gov ------------------------------ From: Jim Demmel Date: Sun, 11 Mar 90 14:17:06 EST Subject: Access to IEEE Exceptions This is in response to the query of David Bernholdt (NA Digest, v. 90, i. 10) about the availability of IEEE floating point exception queries. There is unfortunately no generally agreed upon way to do these queries. This has had the negative effect of discouraging their use, because it is difficult to transport them. More significant, it has discouraged the production of expert software which uses the exception flags in clever ways, because such software would not be easy to transport. There is an effort underway to remedy this in the context of C. A committee called NCEG is meeting in order to set standards for this issue. To get on their mailing list send e-mail to David Hough at SUN Microsystems, dgh@sun.com. Jim Demmel NYU ------------------------------ From: Paul Calamai Date: Mon, 12 Mar 90 09:34:05 EST Subject: Jaccard Metric One of my graduate students has been trying to find references to problems employing the Jaccard metric or the Jaccard coefficient (without much success). The Jaccard coefficient is used to measure the similarity (or dissimilarity) of binary vectors where each vector component indicates the presence or absence of some characteristic or feature. This coefficient can be interpreted as a metric (sometimes called the Tanimoto metric) on the set of binary vectors. The one article we've managed to locate is a 1983 article in SIAM J. Sci. Stat. Comput., 4, "An algorithm for the single facility location problem using the Jaccard metric" by G.A. Watson. We are trying to gauge the usefulness of this metric/coefficient, find any applications and locate any relevant references. If you can help us in any way, please contact me by email or snail mail. My email address is: phcalamai@watfun.waterloo.edu and my snail mail address is: Paul H. Calamai Dept. of Systems Design Eng. Univerity of Waterloo, Waterloo, Ont. CANADA N2L 3G1 Thanks. ------------------------------ From: Joel Saltz Date: Tue, 13 Mar 90 17:50:34 EST Subject: Positions at ICASE The Institute for Computer Applications in Science and Engineering (ICASE) is seeking a researcher in the area of parallel numerical methods. We have a particular interest in recruiting a researcher with interests in in adaptive methods for solving partial differential equations or in sparse linear algebra, we would alternately be interested in recruiting a researcher involved in the development and analysis of new parallel algorithms. We are accepting applications for two year post-doctoral appointments with possible renewal, along with applications of researchers on sabbatical or unpaid leave who might be interested a visiting appointment. ICASE has an iPSC/2 (to be upgraded in a few weeks to an 80860 based iPSC/RX), along with local access to a Cray-2 and minisupercomputers. We also have the usual assortment of Suns and graphics workstations. Applications should respond by e-mail to rgv@icase.edu or should send resumes and descriptions of proposed research to: Dr. Robert G. Voigt Director, ICASE MS 132C, NASA Langley Research Center Hampton VA 23665 Joel Saltz Lead Computer Scientist, ICASE ------------------------------ From: Paul Nelson Date: Tue, 13 Mar 90 16:22:44 CST Subject: Positions at Texas A&M I am communicating to request your assistance in two matters: 1. The Computer Science Department at Texas A&M is seeking to fill an endowed chair in the area(s) of Software Engineering and Parallel Computing. Do you have any suggestions for possible candidates? 2. We also are seeking to fill a junior position in computational matrix theory. Same question. (There follows the text for an ad that is to appear in the March SIAM News. Usual terms for junior tenure-track faculty include $30 k start-up funds, and a teaching load of one course per term for an initial two years.) If you would like further information about either of these, please send me mail or call at 409/846-7917. Paul Nelson Texas A&M University Department of Computer Science Applications are invited for a position for a specialist in computational matrix theory. Requirements include a PhD and evidence of potential for excellence in both teaching and research. The position is nominally at the level of Assistant Professor (tenure-track), but extraordinarily well-qualified applicants for more senior appointments will be considered. Strong preference will be given to those with the doctorate in Computer Science, but applicants with doctorates in closely related fields will be considered. The Department of Computer Science presently consists of 30 faculty and approximately 200 graduate students. It awards graduate degrees through the Ph.D. Both the department and the College of Engineering have a strong commitment to develop the Computational Science and Engineering Area. Texas A&M has approximately 40,000 students, and is located in College Station, approximately 90 miles northwest of Houston. The university has recently installed a CRAY Y-MP, and the department/college anticipate purchase of a state-of-the-art parallel processing system. Applicants should send a resume, and three letters of reference to Dr. Mac Lively, Search Committee Chairman, Department PN, Texas A\&M University, College Station, TX 77843-3112. Texas A&M University is an equal opportunity/affirmative action employer. ------------------------------ End of NA Digest ************************** -------