From num Mon Dec 24 10:39 EST 1990 Original-address: From surfer.EPM.ORNL.GOV!moler Sun Dec 23 20:18:19 0500 1990 remote from pyxis Received: by pyxis; Mon Dec 24 10:39 EST 1990 Received: by inet.att.com; Mon Dec 24 10:39 EST 1990 Received: by surfer.EPM.ORNL.GOV (5.61/1.34) id AA19446; Sun, 23 Dec 90 20:18:19 -0500 Date: Sun, 23 Dec 90 20:18:19 -0500 From: moler@surfer.EPM.ORNL.GOV (Cleve Moler) Message-Id: <9012240118.AA19446@surfer.EPM.ORNL.GOV> To: na-comb@surfer.EPM.ORNL.GOV Subject: NA News Digest Comment: Submissions for NA News Digest, mail to na.digest@na-net.ornl.gov. Comment: Information about NA-NET, mail to na.help@na-net.ornl.gov. Comment: Comments about the NA-NET, mail to nanet@na-net.ornl.gov. NA News Digest Sunday, December 23, 1990 Volume 90 : Issue 45 Today's Editor: Cleve Moler Today's Topics: Biharmonic Equations with Periodic Boundary Conditions Large Numerical Integration Multivariate Polynomial Interpolation Conference in New Zeland NATO Workshop on Numerical Integration Position at Iowa State Position Available at Durham Research Position at Florida State Season's Greetings ------------------------------------------------------- From: Valeria Frontini Date: Mon, 17 Dec 90 14:48:11 ITA Subject: Biharmonic Equations with Periodic Boundary Conditions Has anyone worked with - biharmonic equations with PERIODIC boundary conditions? - I should like to know in which REAL problems these equations have been met and to see, if it is possible, an example of them. Many thanks in advance for the help. Valeria Frontini E-mail address : AFT0 at ICINECA (EARN/BITnet) : na.vfrontini at na-net.ornl.gov (NAnet) : frontini at cineca.it (Internet) Post-mail address: Valeria Frontini C.I.N.E.C.A. via Magnagnelli, 6/3 I-40033 Casalecchio di Reno Bologna Italia Phone : + 39 51 598411 Fax : + 39 51 598472 ------------------------------ From: Christian Lantuejoul Date: Mon, 10 Dec 90 11:01:47 GMT Subject: Large Numerical Integration I'm interested in solving the following problem: Let A be a positive definite square matrix of order n. Compute the numerical integration of exp^{- x' A x} where x' is the transposed of vector x, and x ranges over the product domain [a_1,b_1] x ...x [a_n, b_n]. The crux is that the value of n can be as large as 100. Thanks in advance, Christian Lantuejoul (lantu@cg.ensmp.fr) ------------------------------ From: Annie Cuyt Date: Tue, 11 Dec 90 07:47:47 EST Subject: Multivariate Polynomial Interpolation Who has information concerning the following multivariate problem? In the book of J. Walsh, "Interpolation and Approximation", on page 61 a theorem (nr. 6) is given stating the uniform convergence of the Newton interpolating series for an asymptotic sequence of interpolation points and in the interior of a lemniscate. Does anyone know of an analogous result in the multivariate case. I'm thinking of poly-lemniscates, maybe grids of interpolation points built from asymptotic coordinate sequences in each variable separately, ... Please let me know any basic and/or advanced results with the exact references to the literature. Many thanks in advance. Annie Cuyt. Dept. Mathematics & Computer Science Tel. +32 3 8202407 University of Antwerp (UIA) Telex 33646 UIA B Universiteitsplein 1 Fax. +32 3 8202244 B-2610 Wilrijk-Antwerp e-mail: cuyt@ccu.uia.ac.be Belgium ------------------------------ From: John Butcher Date: Wed, 19 Dec 90 17:44:51 NZD Subject: Conference in New Zeland International Conference on Scientific Computation and Differential Equations Auckland, New Zealand Monday 3rd - Friday 7th, January,1993 Preliminary Announcement Introduction The purpose of this conference is multifarious. First it is intended to be a continuation of the successful conferences held on the numerical solution of differential equations in Albuquerque, Toronto, London and Helsinki in 1986, 1988, 1989, and 1990, respectively. Secondly it is intended as a celebration of Professor John Butcher's sixtieth birthday and his outstanding contributions in the area of numerical methods for the solution of ordinary differential equations of initial value type. For these reasons the main thrust of the conference is in the area of differential equations. However, the third purpose of this conference is to bring together applied mathematicians in New Zealand and Australia who have a computational interest in the subject. Thus talks on any area of scientific computing are most welcome. Topics The major theme of this conference is the ubiquitousness of the differential equation in Applied Mathematics and will focus in part on both modelling and computational aspects in this respect. Topics covered will include numerical methods for the solution of initial value and boundary value problems with or without algebraic constraints; delay differential equations, Volterra integral equations, applications to time- dependent partial differential equations and practical algorithms. As well as these, we invite contributions in other areas of scientific computing, especially those which impinge either directly or indirectly on the field of differential equations. Examples of this include numerical quadrature, linear and nonlinear equations, extrapolation processes and simulation techniques. We particularly welcome talks which consider algorithmic developments in a parallel environment. Organising Committee, with e-mail addresses Dr Kevin Burrage (Director) burrage@mat.aukuni.ac.nz Dr Horst Gerlach (Secretary) gerlach@mat.aukuni.ac.nz Dr Robert Chan chan@mat.aukuni.ac.nz Dr Colin Fox fox@mat.aukuni.ac.nz Address for correspondence Department of Mathematics and Statistics University of Auckland Auckland New Zealand It will be most helpful for our planning if we know as soon as possible who has an interest in taking part in this meeting. Consequently, notices of interest or intent to participate should be sent to Horst Gerlach either by electronic mail or airmail. Even at this early stage, we wish to know who is likely to be presenting a lecture to the conference and we ask you to let Horst also know what your likely intentions are in this respect. Horst will be glad to answer questions not only about the conference but also about tourist possibilities in New Zealand. Copies of this announcement are being made available through na-net and by traditional mail to a number of additional people. Please copy this announcement and pass it on to people we may have overlooked. Even if you have already told us of your interest in taking part in the meeting, please confirm your continued interest to Horst Gerlach. Additional information can be attained from the Director. However please note that, from 1st March 1991, his address will be Professor Kevin Burrage Department of Mathematics University of Queensland St Lucia, Brisbane Australia ------------------------------ From: Terje O. Espelid Date: Fri, 21 Dec 90 14:12:21 +0100 Subject: NATO Workshop on Numerical Integration NATO Advanced Research Workshop Numerical Integration Recent Developments, Software and Applications. June 17-21, 1991 University of Bergen Bergen, Norway An Advanced Research Workshop on numerical integration, sponsored by NATO, will be held at University of Bergen, Bergen, Norway, June 17-21, 1991. The meeting will emphasize recent developments in theory and software, and will include talks on applications. Among those who have already agreed to participate are: J. N. Lyness, P. Rabinowitz, W. Gautschi, P. Keast, A. Genz, R. Piessens, I. Sloan, G. Hammerlin, E. de Donckers- Kapenga, R. Cools, J. Berntsen. Attendance will be limited to about 40 participants. Limited funding is available for travel. For further information, contact T. O. Espelid Department of Informatics University of Bergen Thormohlensgate 55 5008 Bergen, Norway internet: terje@eik.ii.uib.no ------------------------------ From: Glenn Luecke Date: Mon, 17 Dec 90 14:38:03 CST Subject: Position at Iowa State Numerical Analysis Position at Iowa State University Senior or entry level Iowa State University is searching for a senior level numerical analyst to fill a position beginning fall 1991. We have recently expanded the search to include lower level (tenure track) candidates. At either level, the successful candidate will have ample support and opportunity to develop an important research program. The candidate should be interested in an area of application of numerical analysis, preferably one present at Iowa State in the physical sciences or engineering. If you are a good candidate or know of a good candidate, please notify me via regular mail or email at cornette@iastate.edu, or inform the candidate directly if you think he or she would apply without further prompting. Applications should be sent to Dr. Howard Levine, Chair, Department of Mathematics, Iowa State University, Ames, Iowa 50011. The screening process will begin on January 21, but applications will be accepted until the position is filled. James L. Cornette Department of Mathematics Iowa State University Ames, Iowa 50011 ------------------------------ From: Alan Craig Date: Tue, 18 Dec 90 15:09:54 GMT Subject: Position Available at Durham UNIVERSITY OF DURHAM Lectureship in Mathematical Sciences Applications are invited for a Lectureship in Mathematical Sciences to be filled from 1st October 1991, or as soon as possible after that date. Candidates from any area of the Mathematical Sciences, including Statistics, are encouraged to apply. The department is committed to excellence in both research and teaching, and has active research groups in Mathematical Physics, Numerical Analysis, Pure Mathematics and Statistics. The salary is likely to be initially on the Lecturer A scale (12 086 - 16 755 sterling). Applications should be sent to Personnel Officer University of Durham Old Shire Hall Durham DH1 3HP England not later than Wednesday, 13th February 1991, quoting reference 587, from whom further particulars may be obtained. Prospective candidates may contact the current Chairman, Dr. M.A.Armstrong (091 372 2352) or any one of Dr. J.P.Coleman (Numerical Analysis, 091 374 2383), Professor M.Goldstein (Statistics, 091 374 2365), Professor A.J.Scholl (Pure Mathematics, 091 374 2355), Professor E.J.Squires (Applied Mathematics, 091 374 2361) for further information. Alternatively, reply by e-mail to Alan.Craig@uk.ac.durham and your query will be dealt with. ------------------------------ From: Biswa Datta Date: Wed, 19 Dec 90 15:27:59 CST First Announcement Second NIU Conference on LINEAR ALGEBRA NUMERICAL LINEAR ALGEBRA AND APPLICATIONS The Second NIU Conference on Linear Algebra, Numerical Linear Algebra and Applications will be held at Northern Illinois University, DeKalb, Illinois, May 3 - 5, 1991. The purpose of the conference is to bring together researchers in linear algebra, numerical linear algebra and various application areas such as control and systems theory and signal processing, for an effective exchange of ideas and discussion of recent developments and future directions of research. The conference has been sponsored by International Linear Algebra Society and Northern Illinois University's Department of Mathematical Sciences, the Graduate school and College of Liberal Arts and Sciences. All areas of theoretical, numerical and applied linear algebra will be addressed by the conference. The journal "Linear Algebra and Applications" will publish a special issue on the conference with Professors Biswa Datta and Robert Plemmons as special editors. Papers should be submitted to one of the two special editors by July 31, 1991. They will be refereed in the normal way. Besides invited lectures, there will be several sessions on contributed presentations. Inquiries about the conference and the titles and abstracts for contributed presentations should be addressed to: Biswa Nath Datta Dept. of Mathematical Sciences Northern Illinois University DeKalb, IL 60115 Tel: (815) 753-6759 E-Mail: dattab@math.niu.edu or bdatta@na-net.stanford.edu Fax: (815) 753-1824 Deadline for receiving contributed abstracts is February 15, 1991. ------------------------------ From: R. Chella Date: 22 Dec 90 07:56:20 GMT Subject: Research Position at Florida State I am looking for a postdoctoral researcher or Ph.D. graduate student with experience in finite elements and/or boundary element methods to work on a project on the thermomechanical characterization of composites If you are interested, please send email to chella@evax.eng.fsu.edu or regular mail to : R. Chella Florida State University Computing Center P.O. Box 2175 Tallahassee, Florida 32316-2175 USA I would prefer someone who could start asap. ------------------------------ From: NA Net and Jerzy Wasniewski Date: Sun Dec 23 16:59:31 PST 1990 Subject: Season's Greetings * + + A Merry Christmas and +O+ ============= + + | . | . | a Happy New Year +* O+ | . | . | + O + | . | . | 1 9 9 1 + @ + | . | . | + @ * + |----+----| + @ O + | .| .. | + * O + | . | . | + 0X O #+ | . | . | + O *#* + ============= +O 0 * @ + + +O * * 0 & + --------------- ------ | | ------- |#-#-| ------- |#-#-#| ------ ------- ------------------------------ End of NA News Digest ************************** -------