Subject: NA Digest, V. 93, # 38 NA Digest Tuesday, October 12, 1993 Volume 93 : Issue 38 Today's Editor: Cleve Moler The MathWorks, Inc. moler@mathworks.com Today's Topics: Some Frquently Asked Questions Updated Fortran 90 Benchmark Suite Shallow Water and Short Waves Comments on IEEE Arithmetic Division by Zero is OK in Many Cases Use of STRIDE for Initial-value PDEs Corrected Email Address for Hong Kong Baptist College Change of Address for Eric de Sturler Position at Univ. New Mexico and Hawaii Saudi Association for Mathematical Sciences Position, Utrecht University, Netherlands Positions at the University of Colorado at Denver Announcing ONE day Course on Mathematica 17 Nov 1993 Conference on Domain Decomposition Methods Cornelius Lanczos International Centenary Conference NSF Postdoctoral Research Associates LAA Now Accepting LATEX Files Special Issue of LAA Honoring Fiedler and Ptak Contents: Advances in Computational Mathematics Contents: Computational and Applied Mathematics Contents: Linear Algebra and its Applications Submissions for NA Digest: Mail to na.digest@na-net.ornl.gov. Information about NA-NET: Mail to na.help@na-net.ornl.gov. ------------------------------------------------------- From: Alan Edelman Date: Tue, 5 Oct 93 15:22:32 EDT Subject: Some Frquently Asked Questions Answers to frequently asked questions: 1) The 1993 linear algebra survey and other observations on the parallel computing influence may be found in print in "Large Dense Numerical Linear Algebra in 1993: The Parallel Computing Influence", International Journal of Supercomputer Applications, Volume 7, Summer 1993, pp 113-128. 2) The LAPACK manual front and back covers contain matrices that are inverses of each other, if you assume that the small and capitol letters are reciprocals of each other. The matrix is related to Hadamard matrices. Have fun, Alan Edelman ------------------------------ From: John Prentice Date: Tue, 5 Oct 93 22:37:31 MDT Subject: Updated Fortran 90 Benchmark Suite Announcing the availability of the Quetzal Fortran 90 Benchmark Suite The latest version of the Quetzal Computational Associates Fortran 90 compiler benchmark results are now available from anonymous ftp at unmfys.unm.edu in the directory pub/quetzal. The benchmark codes themselves are available as well and so is a review of the VAST-90 utility for converting Fortran 77 codes to Fortran 90. Please note that this ftp site is different from the one used in the past. This version of the benchmark suite differs in many significant ways from the original one that was made available earlier this year. In particular, some codes have been dropped from the suite and several others have been added. The benchmark results have been updated to reflect the performance of newer releases of the compilers on the codes in the new benchmark suite. Please contact me if you have any problems with the anonymous ftp directory or other questions. John John K. Prentice Quetzal Computational Associates 3200 Carlisle N.E., Albuquerque, NM 87110-1664 USA Phone: 505-889-4543 Fax: 505-889-4598 E-mail: quetzal@aip.org ------------------------------ From: Gustavo Montero Garcia Date: Fri, 8 Oct 93 10:00:46 GMT Subject: Shallow Water and Short Waves I'll be so grateful if you send me some information about NUMERICAL MODELLING IN SHALLOW WATER PROBLEMS. SHORT WAVES I'm interested in references, software and people working in this field of simulation by FEM. Thank you. Gustavo Montero Prof. Tit. U. Centro de Aplicaciones Numericas en Ingenieria CEANI Universidad de Las Palmas de Gran Canaria Campus de Tafira Baja 35017 Tafira ( Las Palmas de Gran Canaria) Islas Canarias -Espa~na- Tf.: + 34 28 451 917 FAX.: + 34 28 451 921 E-mail: gustavo@titan.ulpgc.es ------------------------------ From: James Demmel Date: Fri, 8 Oct 93 17:49:27 -0700 Subject: Comments on IEEE Arithmetic Comments on IEEE Arithmetic Jim Demmel Computer Science Division and Math Dept. University of California Berkeley, CA 94720 demmel@cs.berkeley.edu This is in response to the various comments on IEEE arithmetic in the last few NA-Digests. Many user complaints are a result of the IEEE floating point standards 754 and 854 specifying how systems "should appear" to the user, without specifying any specific language bindings. These binding were not part of the standard, because the committee members felt that writing a standard demanding simultaneous changes in hardware, languages, compilers, and perhaps operating systems (for exception handling) was unlikely to to be accepted, or if accepted, implemented correctly. This "act of cowardice" (in the words of W. Kahan) has unfortunately made it impossible to write portable software which uses features of IEEE like exception handling. This confusion, which is still much better than the pre-IEEE situation of different roundings, etc., has motivated some people to try to standardize language bindings in a proposed Language Independent Arithmetic (LIA) ISO standard. Unfortunately, I believe the LIA still does not give adequate access to IEEE features, and indeed it was recently voted down for this reason by the US/ISO committee. It is currently being redrafted, and may still be accepted, but this is another story. W. Kahan has designed his own set of language bindings for exception handling, which is easier to do than a full set of environmental enquiries. He is interested in exploring implementations with interested parties. The IEEE standard specifically requires that the default behavior of a system should NOT be to trap on exceptions, but to compute and/or propagate infinities and NANs. One reason for this decision was to force manufacturers to implement NAN and infinity arithmetic with reasonable efficiency, since otherwise they would be tempted to take the easy way out (implementation via traps to software) and so make infinities and NANs so slow that they would be impossible to use effectively. Some manufacturers have still chosen to use software traps, and others have not. For a recent paper on how to use infinities and NANs to speed up numeric codes, and the price one pays for implementing them too slowly, see the reference by Demmel and Li below [1]. All IEEE machines permit trapping on exceptions, and it should be a prominently documented feature as to how to do this for any particular system, either via a system subroutine call or compile line option. It is unfortunate that compiler and system library writers do not document this more clearly. [1] Demmel, J. and Li, X., "Faster Numerical Algorithms via Exception Handling", Proceedings of the 11th Symposium on Computer Arithmetic, IEEE Computer Society Press, E. Swartzlander, M. J. Irwin and G. Jullien, eds., June 29 -- July 2, Windsor Canada, 1993. Available as all.ps.Z via anonymous ftp from toe.cs.berkeley.edu, in directory pub/tech-reports/cs/csd-93-728; software is csd-93-728.shar.Z. An extended version is to be submitted to IEEE Trans. Computers. [2] Demmel, J., Underflow and the Reliability of Numerical Software, SIAM J. Sci. Stat. Comput., 1984, v. 5, n. 4, pp 887-919, December ------------------------------ From: Dean Schulze Date: Sat, 09 Oct 1993 14:24:24 -0700 (MST) Subject: Division by Zero is OK in Many Cases Mike Peterson writes (Na Digest Volume 93, Issue 37): >Why anyone would want a default behaviour to allow a program to >continue executing after dividing by 0 (either integer or floating >point), or creating a NaN by whatever means (e.g. fp overflow), is >beyond me. In my many years of programming, I can't think of one >case where I would want this to happen. Performing such operations >is a clear indication of a program(mer) error, You've got to be kidding! Your programming experience through those many years must have been restricted to a very limited class of problems. One common example of when you would want to continue execution after dividing by zero is when computing trigonometric functions. Here is one example where IEEE arithmetic is a godsend: exp(exp(-1.0/cos(chi))) This is not a contrived example. It is used when computing Chapman functions which are used in the theory of planetary atmospheres. The ability of IEEE arithmetic to correctly compute trigonometric functions when the argument is a multiple of pi/2.0 is what made a fan of IEEE arithmetic. Dean Schulze ------------------------------ From: John Butcher Date: Wed, 13 Oct 93 11:26:18 +0000 (NZS) Subject: Use of STRIDE for Initial-value PDEs Use of STRIDE for initial-value PDEs The code STRIDE, based on singly-implicit Runge-Kutta methods, is at present undergoing further testing and development especially for its possible use to solve PDEs with 1 space dimension using either finite difference or finite element discretizations. At present we have managed to solve some classical problems such as Burgers equation and the KdV equation. Part of the success of our method is the stability of the underlying numerical methods but we have also found great advantages in the flexible calling sequence used in our integrator. This makes it possible, for example to solve problems of the form My' = f(t,y), where both M and the Jacobian of f have banded structures, without throwing away this structure in the integrator. We would like to hear about other codes that have been used for this type of problem with some indication of successes or difficulties that might have been encountered. We would also like to extend our range of test problems and we ask for examples of some reasonably challenging time-dependent PDE problems. Many thanks, John BUTCHER butcher@mat.aukuni.ac.nz MAI Ying, mai@mat.aukuni.ac.nz ------------------------------ From: Fred Hickernell Date: Wed, 6 Oct 1993 09:12:08 -0700 (PDT) Subject: Corrected Email Address for Hong Kong Baptist College The email address in last week's notice of positions at HKBC should be fred@math.hkbc.hk (not .edu). My sincere apologies. ------------------------------ From: Eric de Sturler Date: Wed, 6 Oct 93 18:25:00 +0100 Subject: Change of Address for Eric de Sturler Dear Colleagues, I recently changed jobs. My new address is: Eric de Sturler Swiss Scientific Computing Center CSCS/ETHZ Via Cantonale, CH-6928 Manno, Switzerland Telephone: +41-91 50 82 65 Fax : +41-91 50 67 11 Email : sturler@serd.cscs.ch the old address was: Delft University of Technology Faculty of Technical Mathematics and Informatics P.O.Box 5031 2600 GA Delft, The Netherlands ------------------------------ From: Brian Smith Date: Tue, 5 Oct 1993 10:43:27 -0600 Subject: Position at Univ. New Mexico and Hawaii Job Classification: Director, High Performance Computing Center Job Description: Director of Maui High Performance Computing Center, Kihei, Hawaii Position Description: The University of New Mexico (UNM) seeks a director for the new Maui High Performance Computing Center to be located in Kihei, Hawaii. Director will lead the Maui Center installing high performance computing equipment and communications services, establishing education, user services, outreach, economic development, and technology transfer programs, and seeking enhanced funding for the Center. Minimum qualifications: PhD in scientific or engineering discipline. At least ten years experience operation/administration of high performance computing center; at least two of these years assisting or directing a high performance computing facility. Desired qualifications: National reputation in high performance computing with membership on national committees and boards, and recognized in the field of high performance or scientific computing. Applications, resume, and names of four references (include mailing and e-mail addresses) must be received by 10/22/93. Send application material to Director Search Committee, Maui Project, Math Annex, University of New Mexico, Albuquerque, NM 87131. Reference position announcement 0893-93A. UNM is an Affirmative Action/Equal Opportunity Employer ------------------------------ From: Omar Hamed Date: Thu, 07 Oct 93 11:48:27 +0000 (SLT) Subject: Saudi Association for Mathematical Sciences Second Announcement for the First Annual Meeting of the Saudi Association for Mathematical Sciences (SAMS) 24-26 ahawal 1414 a.h. 5-7 April 1994 a.d. venue: King saud university,riyadh, saudi arabia topics: pure and applied mathematics, mathematical physics, statistics & O.R.,mathematical education. language: arabic & english deadline for recieving papers: 15 december 1993 papers should be sent to: the annual meeting committee department of mathematics college of science king saud university p.o.box 2455, riyadh 11451 saudi arabia participants will bear their own accomodation and travel expenses. nationals of countries outside the arab gulf cooperative council are required to have visas for entering saudi arabia. sams will help to facilitate visa procedures for such participants to the extent possible. ------------------------------ From: H.A. van der Vorst Date: Thu, 7 Oct 93 11:15:54 +0100 Subject: Position, Utrecht University, Netherlands POSTDOCTORAL POSITION ASTRONOMICAL INSTITUTE, UTRECHT UNIVERSITY, THE NETHERLANDS PARALLEL COMPUTATION OF MAGNETOHYDRODYNAMICS IN THERMONUCLEAR AND ASTROPHYSICAL PLASMAS The Astronomical Institute in the Department of Physics and Astronomy at Utrecht University in the Netherlands has a postdoctoral position available for two years for research on parallel computing applied to time dependent magnetohydrodynamics of astrophysical and thermonuclear plasmas. The successful candidate will work in a group of four postdocs. Two are working on time dependent magnetohydrodynamics calculations applied to astrophysics and plasma physics and two will work on parallel computing applied to time dependent magnetohydrodynamics. The group is divided between the Astronomical Institute, Utrecht University and the FOM Institute for Plasma Physics located just outside Utrecht. This work is a cooperation between the two Institutes and is under the direction of Professor J.P. Goedbloed, Professor A.G. Hearn and Professor M. Kuperus. The research into parallel computing is in cooperation with Professor H.A. van der Vorst, Mathematics Institute, Utrecht University. At present there is a Parsytec GC 512 and an IBM SP1 at Amsterdam, and a Thinking Machines CM 5 at Groningen. These computers are accessible through the computer network. The Utrecht University Computer Centre has a Meiko MK200. Applications are invited from astrophysicists, physicists and computational scientists who have or will shortly obtain a Ph.D. Experience with the numerical methods of time dependent (magneto)hydrodynamics and/or parallel computing is an advantage. The salary will be according to age and experience from Hfl 4100 up to a maximum of Hfl 4600 gross per month ( US $1 ~ Hfl 1.80 ). The starting date for the appointment is flexible. Further information may be obtained from Professor A.G. Hearn, preferably by email. Applications should reach Professor A.G. Hearn before 31st October 1993. They should contain a curriculum vitae, list of publications, and a short description of research interests, together with the names and addresses (with email addresses if possible) of three persons who may be asked to write a reference on the suitability of the applicant for the position. Applications may be submitted by email, fax or letter to :- Professor A. G. Hearn Sterrekundig Instituut Postbus 80000 3508 TA Utrecht The Netherlands Email ahearn@fys.ruu.nl 30453::27752::ahearn ahearn@solar.bitnet Fax intl +31 30 535201 Tel. intl +31 30 535202 ------------------------------ From: Roland Sweet Date: Thu, 7 Oct 93 13:44:06 -0600 Subject: Positions at the University of Colorado at Denver UNIVERSITY OF COLORADO AT DENVER DENVER, COLORADO Department of Mathematics Contingent upon funding the Department of Mathematics anticipates up to three tenure-track and/or visiting positions for the Academic Year 1994-95. Two positions will be in computational mathematics--one possibly senior position at the full or associate professor level and one junior position at the associate or assistant professor level. The person filling the senior position will be expected to exercise leadership in the Center for Computational Mathematics. The third position is a junior position in one of the areas of discrete mathematics, operations research, or probability and statistics. The University of Colorado at Denver is an urban university located in downtown Denver, which is at the center of the scientific and business corridor of the Colorado Front Range. The Mathematics Department offers BS and MS degrees in Mathematics and a PhD degree in Applied Mathematics. The faculty consists of nineteen full-time members. Applicants are expected to have strong research records or the potential for strong research and to have a strong commitment to teaching. Applicants must have, or be about to receive, a Ph.D. degree. Applicants should send a current vita, list of publications, statement of current and planned research, statement of teaching philosophy, and arrange to have three letters of recommendation sent to: Mathematics Faculty Search Committee, Campus Box 170, University of Colorado at Denver, P.O. Box 173364, Denver, CO, 80217-3364. The deadline for applications is January 31, 1994. The University of Colorado at Denver is committed to enhancing the diversity of its administration, faculty, and staff and invites and strongly encourages nominations of and applications from women, members of ethnic and racial minorities, veterans, and people with disabilities. Alternative formats of this ad or job description are available upon request for people with disabilities. ------------------------------ From: Elizabeth Smith Date: Mon, 11 Oct 93 10:37 +0100 (BST) Subject: Announcing ONE day Course on Mathematica 17 Nov 1993 === One day Course === MATHEMATICA: a tutorial introduction 17 November 1993 Applied Mathematics and Operational Research Group, Royal Military College of Science. The course is specifically designed for scientists, engineers and lecturers who either use routine numerical/matrix calculations in their specific application area or teach the subject at various levels. No specialist knowledge of programming or computer science is required, but participants are expected to have basic knowledge of computing and to be educated to degree level. Every participant will receive a comprehensive set of lecture notes illustrating various features of MATHEMATICA. The course provides hands-on experience of the MATHEMATICA package which will be followed by a selection of case studies from scientific and engineering applications. Lectures are accompanied by several tutorials where the participants will have ample opportunity to work on a topic of their own choice. The course lectures will be given by the teaching and research staff of the Applied Mathematics and Operational Research Group under the direction of Dr. Venkat V.S.S. Sastry. To reserve a place on the course please write to Mrs. E. Smith, Applied Mathematics and Operational Research Group, RMCS, Shrivenham, Swindon, Wilts., SN6 8LA or Tel: (0793) 785317 or Fax: (0793) 782179 or e-mail: smithe@uk.ac.cran.rmcs ------------------------------ From: Jinchao Xu Date: Mon, 11 Oct 1993 10:31:03 -0400 Subject: Conference on Domain Decomposition Methods This is to remind that the Seventh International Conference on Domain Decomposition Methods will take place during October 27--30, 1993 at the Keller Conference Center at Penn State University, State College, Pennsylvania, USA. The conference will begin at 9:00am Wednesday, October 27 and will end around 4:00pm on Saturday, October 30. The conference banquet will be held on Friday evening, October 29 at 7:00pm. Those who arrive early will be able to register at a reception on Tuesday, October 26 at 6:30pm (at Nittany Lion Inn, State College). More detailed information relevant to the conference may be obtained via anonymous ftp to ftp.math.psu.edu (146.186.131.129) in the directory pub/ddm7. A tentative list of contributed presentations and invited talks can be found by "finger ddm7@math.psu.edu". For further Information, contact: Dr. Jinchao Xu (Conference Chair) Ms. R. Manning (Conference Secretary) Department of Mathematics Tel. 814-865-7527 Penn State University Fax. 814-865-3735 University Park, PA 16802-6403 e-mail: ddm7@math.psu.edu For Registration and hotel information, contact: Mr. J. Sinclair (Conference Coordinator) Penn State University Tel. 814-863-1744 409 Keller Conference Center Fax. 814-865-3749 University Park, PA 16802-1304 e-mail: JWS5@OAS.PSU.EDU ------------------------------ From: Moody Chu Date: Mon, 11 Oct 93 16:09:50 -0400 Subject: Cornelius Lanczos International Centenary Conference REGISTRATION FOR LANCZOS CONFERENCE CORNELIUS LANCZOS INTERNATIONAL CENTENARY CONFERENCE December 12-17,1993 North Carolina State University Raleigh, NC, USA Colleagues interested in attending the Lanczos Conference are cordially reminded to register for the meeting before NOVEMBER 1 in order to take advantage of the reduced registration fee. A Preliminary Program has been sent out by regular mail according to our mailing list. If you have not received the preliminary program, or if you would like to receive e-mail versions of the information, please send an e-mail to lanczos@math.ncsu.edu by including one of the following lines in the SUBJECT line of your message: send registration material send hotel information send program schedule We are looking forward to an exciting gathering in Raleigh and hope you are there. ------------------------------ From: Bob Voigt Date: Tue, 12 Oct 1993 10:45:59 -0400 Subject: NSF Postdoctoral Research Associates NSF 93-150 Postdoctoral Research Associates in Computational Science and Engineering: Program Announcement DIVISION OF ADVANCED SCIENTIFIC COMPUTING OFFICE OF CROSS-DISCIPLINARY ACTIVITIES DEADLINE: NOVEMBER 29, 1993 NATIONAL SCIENCE FOUNDATION Effective October 25, 1993, the new mailing address will be: National Science Foundation 4201 Wilson Blvd. Arlington, VA 22230 CISE Postdoctoral Research Associates in Computational Science and Engineering The Computer and Information Science and Engineering (CISE) Directorate of the National Science Foundation plans a limited number of grants for support of Postdoctoral Research Associateships contingent upon available funding. The Associates are of two types: - Associateships in Computational Science and Engineering (CS&E Associates) supported by the New Technologies Program in the Division of Advanced Scientific Computing (DASC) in cooperation with other NSF CS&E disciplines (CS&E Associates). The objective of these Associateship awards is to increase expertise in the development of innovative methods and software for applying high performance, scalable parallel computing systems in solving large scale CS&E problems. - Associateships in Experimental Science (ES Associates) supported by the Office of Cross Disciplinary Activities (CDA) . The objective of the ES Associateship awards is to increase expertise in CISE experimental science by providing opportunities for associates to work in established laboratories performing experimental research in one or more of the research areas supported by the CISE Directorate. These awards provide opportunities for recent Ph.D.s to broaden their knowledge and experience and to prepare them for significant research careers on the frontiers of contemporary computational science and engineering and experimental science. It is assumed that CS&E Associates will conduct their research at academic research institutions or other centers or institutions which provide access, either on site or by network, to high performance, scalable parallel computing systems and will be performing research associated with those systems. It is assumed that ES Associates will conduct their research in academic research institutions or other institutions devoted to experimental science in one or more of the research areas supported by the CISE Directorate. Additional Information: If you wish additional information, please contact Dr. Robert G.Voigt, Program Director, New Technologies, DASC, at 202-357-7727 (e-mail: rvoigt@nsf.gov) for CS&E Associates or Dr. Tse-Yun Feng, Program Director, CDA at (202) 357-7349 (e-mail: tfeng@nsf.gov) for ES Associates. After November 19, 1993, the phone numbers are respectively 703-306-1962 and 703-306-1980. Copies of most program announcements are available electronically using the Science and Technology Information System (STIS). The full text can be searched on-line, and copied from the system. Instructions for use of the system are in NSF 91-10 "STIS Flyer." The printed copy is available from the Forms and Publications Unit. An electronic copy may be requested by sending a message to "stis@nsf" (bitnet) or "stis@nsf.gov" (Internet). ------------------------------ From: Hans Schneider Date: Thu, 7 Oct 1993 10:13:15 -0500 (CDT) Subject: LAA Now Accepting LATEX Files LATEX files for accepted LAA papers. Elsevier Science Publishing Co. is now accepting LATEX files for publishing papers in LAA and a LATEX macro file has been created specifically for LAA. We hope that authors obtain and use these macros for composing their papers. This reduces proof reading to a minimum, among other advantages to authors, editors and the publisher. Below we give a description of the process involved. First, it should be noted that until final acceptance of a paper, the editorial process is unchanged. Authors should continue to submit three hard copies of their typescript to an editor. An electronic file is not desired at this stage; although an author may vary this procedure by agreement with individual Associate Editors. A LATEX file is desired only at the time of final acceptance of the paper. If an author wishes to submit a LATEX file if his/her paper is accepted, he/she should inform the editor of this in the letter accompanying submission. The author will then be asked to send the LATEX file to the editor-in-chief either by the editor who recommends acceptance or by the editor-in-chief who accepts the paper. The LATEX file may be on a disk (preferably) or it may be sent by email. This file must be identical to the hard copy of the paper accepted for publication. It is essential that a diskette is clearly labeled with the following information: the name of the authors, the email address of the corresponding author, title of the paper, the LAA number, RFP number (found in the letter of acceptance, if known). If the file is sent by email, the same information should be commented in near the beginning. The RFP (or LAA) number should also be included in the "Subject" line. Additional information on what this file should contain and on LAA macros can be found in the LATEX guidelines available from IIC as file LAA LATEX-G and the LAA macros themselves are available from IIC as file LAA LATEX-M. Note that these files were revised in September 1993. The LAA macro codes should not be modified. If an author believes that some modification is needed for his paper, he should consult the editor-in-chief. Questions about the LAA macros should be addressed to the LATEX Editor - Elsevier Publications, see the email address below. Authors should note that the copy editor will work from the accepted hard copy only (and that is one reason why no changes should be made in the LATEX file subsequent to acceptance). Authors will receive proofs as usual. Corrections made by the copy editor and by the author at proof stage will be incorporated in the LATEX file by Elsevier. E-mail addresses: Editor-in-chief Richard A. Brualdi brualdi@math.wisc.edu Hans Schneider hans@math.wisc.edu LATEX editor - Elsevier Publications Charles Hurley c.hurley@panix.com IIC listserv@technion.technion.ac.il ------------------------------ From: Hans Schneider Date: Sat, 9 Oct 1993 11:06:43 -0500 (CDT) Subject: Special Issue of LAA Honoring Fiedler and Ptak LINEAR ALGEBRA AND ITS APPLICATIONS Special Issue Honoring Miroslav Fiedler and Vlastimil Ptak (Second announcement, note the new submission deadline below) In view of their major contribution to linear algebra and to this journal, LAA will publish a special issue in honor of Miroslav Fiedler and Vlastimil Ptak to mark the occasion of their retirement. The purpose of this announcement is to solicit papers for this issue. The deadline for submission is 31 December 1993 and the issue is expected to appear about 15 months later. Papers are invited concerning any aspect of linear algebra, its applications, and its interactions with graph theory or functional analysis. All contributions will be subject to the normal reviewing process. Submissions should be sent to one of the special editors of this issue: Wayne Barrett Department of Mathemtics Brigham Young University Provo, UT 84602 USA Email: wayne@math.byu.edu Angelika Bunse-Gerstner Fachbereich Mathematik und Informatik Universitaet Bremen Postfach 33 04 40 D-W-2800 Bremen 33 Germany Email: angelika@mathematik.uni-bremen.de Nicholas Young Department of Mathematics Fylde College Lancaster University Lancaster LA1 4YF England Email: N.J.Young@uk.ac.lancs.cent1 ------------------------------ From: Daniel Baltzer Date: Tue, 5 Oct 1993 13:38:21 +0100 Subject: Contents: Advances in Computational Mathematics Advances in Computational Mathematics Contents Volume 1, issues 3 & 4 W. Dahmen, S. Prossdorf and R. Schneider: Wavelet approximation methods for pseudodifferential equations II: Matrix compression and fast solution, pp. 259 - 335 K.A. Cliffe, T.J. Garratt and A. Spence: Eigenvalues of the discretized Navier Stokes equation with application to the detection of Hopf bifurcations, pp. 337 - 356 J. Williams and Z. Kalogiratou: Least squares and Chebyshev fitting for parameter estimation in ODEs, pp. 357 - 366 C.T.H. Baker and C.A.H. Paul: Parallel continuous Runge-Kutta methods and vanishing lag delay differential equations, pp. 367 - 394 Advances in Computational Mathematics is an interdisciplinary journal of high quality, driven by the computational revolution and emphasising innovation, application and practicality. This journal is of interest to a wide audience of mathematicians, scientists and engineers concerned with the development of mathematical principles and practical issues in computational mathematics. Publication areas of Advances in Computational Mathematics include computational aspects of algebraic, differential and integral equations, statistics, optimization, approximation, spline functions and wavelet analysis. Submissions are especially encouraged in modern computing aspects such as parallel processing and symbolic computation and application areas such as neural networks and geometric modelling. All contributions should involve novel research. Expository papers are also welcomed provided they are informative, well written and shed new light on existing knowledge. The journal will consider the publication of lengthy articles of quality and importance. From time to time special issues devoted to topics of particular interest to the reader will be published with the guidance of a guest editor. Ideas for special issues can be communicated to the Editors-in-Chief. Software of accepted papers is tested and made available to the readers. Short communications, a problems section and letters to the Editors-in-Chief are also featured in the journal at regular intervals. Advances in Computational Mathematics is being published quarterly. Authors are cordially invited to submit their manuscripts in triplicate to John C. Mason, Applied & Computational Mathematics Group, Royal Military College of Science, Shrivenham, Swindon SN6 8LA, UK, E-mail: mason@rmcs.cran.ac.uk ------------------------------ From: Marijcke Haccou Date: Tue, 5 Oct 1993 13:23:37 +0100 Subject: Contents: Computational and Applied Mathematics J. COMPUTATIONAL AND APPLIED MATHEMATICS; Volume 48, No. 1-2, 29 OCTOBER (1993) (contents) Special Issue Proceedings of the Seventh Spanish Symposium on Orthogonal Polynomials and Applications (SPOA VII) Granada, Spain, 23--27 Setember 1991 Invited papers J.S. Dehesa, Preface 1 R. Askey, Problems which interest and/or annoy me 3 D. Bessis and G. Mantica, Orthogonal polynomials associated to almost periodic Schr\"{o}dinger operators. A trend towards random orthogonal polynomials 17 B.M. Brown, W.D. Evans and L.L. Littlejohn, Orthogonal polynomials and extensions of Copson's inequality 33 A. Bultheel, P. Gonz\'{a}lez-Vera, E. Hendriksen and O. Nj{\aa}stad, Moment problems and orthogonal functions 49 W.N. Everitt, L.L. Littlejohn and S.C. Williams, Orthogonal polynomials and approximation in Sobolev spaces 69 T.H. Koornwinder, On Zeilberger's algorithm and its {\it q}-analogue 91 F. Marcell\'{a}n, M. Alfaro and M.L. Rezola, Orthogonal polynomials on Sobolev spaces: old and new directions 113 P. Maroni, Variations around classical orthogonal polynomials. Connected problems 133 A. Moussiaux, CONVODE: a REDUCE package for solving differential equations 157 M.E. Muldoon, Properties of zeros of orthogonal polynomials and related functions 167 F. Peherstorfer, Orthogonal and extremal polynomials on several intervals 187 W. Van Assche, Christoffel functions and Tur\'{a}n determinants on several intervals 207 W. Van Assche (Edito), Open problems 225 List of talks 245 List of participants 249 ------------------------------ From: Richard Brualdi Date: Wed, 6 Oct 1993 17:46:16 -0500 (CDT) Subject: Contents: Linear Algebra and its Applications LINEAR ALGEBRA AND ITS APPLICATIONS: volume 194 Daniel Sweet (College Park, Maryland) Quadratic Characterizations for Reciprocal Linear Difference Equations 1 Chiou-Ming Huang and Dianne P. O'Leary (College Park, Maryland) A Krylov Multisplitting Algorithm for Solving Linear Systems of Equations 9 Lawrence A. Harris (Lexington, Kentucky) Computation of Functions of Certain Operator Matrices 31 Yasuhiko Ikebe, Yasushi Kikuchi (Tsukuba City, Ibaraki, Japan), Issei Fujishiro (Tokyo, Japan), Nobuyoshi Asai, Kouichi Takanashi, and Minoru Harada (Tsukuba City, Ibaraki, Japan) The Eigenvalue Problem for Infinite Compact Complex Symmetric Matrices With Application to the Numerical Computation of Complex Zeros of J0(z)_iJ1(z) and of Bessel Functions Jm(z) of Any Real Order m 35 Adolf Rhodius (Dresden, Germany) On Explicit Forms for Ergodicity Coefficients 71 Dragomir Z. Dokovic (Waterloo, Ontario, Canada) Factorization of Hermitian Matrix Polynomials With Constant Signature 85 Jacob C. Engwerda (Tilburg, the Netherlands) On the Existence of a Positive Definite Solution of the Matrix Equation X=ATX_1A=1 91 Li Ping and Feng Yu Yu (Hefei, Anhui, People's Republic of China) Criteria for Copositive Matrices of Order Four 109 Allen D. Ziebur (Binghamton, New York) The Chain Rule for Functions With a Matrix Argument 125 E. Neely Atkinson (Houston, Texas) Computing ATA_BTB=LTDL Using Generalized Hyperbolic Transformations 135 Jaspal Singh Aujla (Jalandhar, Punjab, India) Matrix Convexity of Functions of Two Variables 149 G. Alefeld and G. Mayer (Karlsruhe, Germany) The Cholesky Method for Interval Data 161 Alex Pothen (Waterloo, Ontario, Canada) Predicting the Structure of Sparse Orthogonal Factors 183 Werner Kratz (Ulm, Germany) A Limit Theorem for Monotone Matrix Functions 205 Author Index 223 ^^^^^^^^^^^^^^^^^^^ LINEAR ALGEBRA AND ITS APPLICATIONS Volume 195 J. P. Milaszewicz and L. P. Moledo (Buenos Aires, Argentina) On Nonsingular M-Matrices 1 T. L. Hayden (Lexington, Kentucky) and P. Tarazaga (Mayaguez, Puerto Rico) Distance Matrices and Regular Figures 9 J. J. McDonald (Madison, Wisconsin), M. Neumann (Storrs, Connecticut), and H. Schneider (Madison, Wisconsin) Resolvents of Minus M-Matrices and Splittings of M-Matrices 17 Sonia P. Coelho (Sao Paulo, Brazil) The Authomorphism Group of a Structural Matrix Algebra 35 William F. Trench (San Antonio, Texas) Interlacement of the Even and Odd Spectra of Real Symmetric Toeplitz Matrices 59 Kee Yuen Lam (Vancouver, British Columbia, Canada) and Paul Yiu (Boca Raton, Florida) Linear Spaces of Real Matrices of Constant Rank 69 Kresimir Veselic and Ivan Slapnicar (Hagen, Germany) Floating-Point Perturbations of Hermitian Matrices 81 Vjeran Hari (Zagreb, Croatia) and Noah H. Rhee (Kansas City, Missouri) A Matrix Pair of an Almost Diagonal Skew-Symmetric Matrix and a Symmetric Positive Definite Matrix 117 William D. O'Neill (Chicago, Illinois) M-Matrices and Bounds for Reliable Transmission of Information in Communication Systems and Economic Markets 145 D. J. Hartfiel (College Station, Texas) Results on Limiting Sets of Markov Set Chains 155 A. A. Ebiefung (Chattanooga, Tennessee) and M. M. Kostreva (Clemson, South Carolina) Generalized P0- and Z-Matrices 165 William C. Waterhouse (University Park, Pennsylvania) The Degrees of the Cyclotomic Extension Fields 181 Jianming Miao and Adi Ben-Israel (New Brunswick, New Jersey) Minors of the Moore-Penrose Inverse 191 Author Index 209 ------------------------------ End of NA Digest ************************** -------