Subject: NA Digest, V. 97, # 11 NA Digest Sunday, March 16, 1997 Volume 97 : Issue 11 Today's Editor: Cleve Moler The MathWorks, Inc. moler@mathworks.com Today's Topics: Seeking Finite Element Navier Stokes Solver Software Available for Nonsmooth Optimization SoPlex, New LP Solver Available Domain Decomposition On Unstructured Grids VECFEM, Version 3, is Released Test Problems for Solution of 2-D Burger's Equation Tesselation of Sphere Fast Fourier Transform on Sphere Mathematical Foundations of Computer Graphics High Performance Fortran in Numerical Analysis Parallel Linear Algebra Package Temporary Address Change for Michael Breitner Change of Address for Adolfy Hoisie New Position for Robert Voigt Congratulations to Margaret Wright and Cleve Moler New Book on Complementarity and Variational Problems Object-oriented Numerics List Latest News in Mesh Generation BLAST Forum Minutes Gordon Conference on High Performance Computing Symposium on Differential-Algebraic Equations Southern Ontario Numerical Analysis Day Course on Nonlinear Hyperbolic Equations Contents, Journal of Approximation Theory Conference on Preconditioned Iterative Solution Methods Symposium on Algorithms for Macromolecular Modelling Euler Equations, Navier Stokes Equations, and Singularities Symposium on Modeling Complex Turbulent Flows Bristol/Bath Numerical Analysis Day Postdoctoral Positions at Stony Brook Graduate Research Assistentship at Delft University of Technology Postdoctoral Position at University of Bergen Submissions for NA Digest: Mail to na.digest@na-net.ornl.gov. Information about NA-NET: Mail to na.help@na-net.ornl.gov. URL for the World Wide Web: http://www.netlib.org/na-net/na_home.html ------------------------------------------------------- From: Hu Kunzhong Date: Mon, 10 Mar 1997 16:50:03 +0800 (CST) Subject: Seeking Finite Element Navier Stokes Solver We commit a project about solving incompressible velocity -pressure Navier-Stokes equations with Finite Element Method. We have many problems in solving this problem. Who have the program about this field? Would you please share it with me! Thank you very much for your kindly help! I am looking forward to your response. Hu Kunzhong, Master of Univ. of Sci. and Tech. of China (USTC) Mail address, Room 4-202, P.O. box 4, Hefei Anhui P.R. China E-Mail, hukz@sunlx05.mech.ustc.edu.cn Tel, 0086-551-3601237 ------------------------------ From: Alexei Kuntsevich Date: Mon, 10 Mar 1997 10:19:06 -0800 Subject: Software Available for Nonsmooth Optimization Dear colleagues, New freeware libraries for nonsmooth optimization are available through the URL: http://bedvgm.kfunigraz.ac.at:8001/alex/solvopt/slv_main.html One can download Matlab, Fortran and C sources designed for a number of platforms from the site, get postscript files containing the complete manual and read the manual and instructions online. Along with this, one can see there the results proving a high performance of the program. All this is ABSOLUTELY FREE! The site is devoted to the Solver for Local Nonlinear (non-smooth) Optimization Problems - SolvOpt. SolvOpt is a new implementation of the known Shor's R-algorithm with space dilation along the difference of two successive gradients. Dr. Alexei V. Kuntsevich Institut fuer Mathematik Karl-Franzens Universitaet Heirichstr., 36 A-8010 Graz, Austria fax: +43 316 3809815 tel: +43 316 3805173 e-mail: alex@bedvgm.kfunigraz.ac.at http://bedvgm.kfunigraz.ac.at:8001/alex/solvopt/solvopt.html ------------------------------ From: Martin Groetschel Date: Sun, 16 Mar 1997 17:12:32 +0100 Subject: SoPlex, New LP Solver Available Hello, I am happy to announce the availability of a new LP solver called SoPlex, the sequential object-oriented simplex. For academic and noncommercial use, it may be retreived for free from: www.zib.de/Optimization/soplex/index.html SoPlex is an object-oriented implementation of primal and dual simplex algorithms in C++ I have developed for my Ph.D. thesis "Paralleler und Objektorientierter Simplex-Algorithmus". Roland Wunderling ------------------------------ From: Mark Hagger Date: Mon, 10 Mar 1997 14:04:17 +0000 Subject: Domain Decomposition On Unstructured Grids Announcing the first release of DOUG (v1.95) -- Domain decomposition On Unstructured Grids -- DOUG is a black box parallel iterative solver for finite element systems arising from elliptic partial differential equations. Used in conjunction with a finite element discretisation code, DOUG will solve the resulting linear systems using an iterative method and provides a range of powerful domain decomposition preconditioners. The code is designed to run effectively in parallel on virtually any machine that supports MPI. The matrix-vector operations arising in the iterative method are parallelised using graph partitioning software and additive Schwarz preconditioners can be automatically constructed by DOUG using only minimal input. In this first release a full additive Schwarz preconditioner with automatically generated coarse grid is provided in 2D only. A version without the coarse grid is available in 3D. DOUG makes no assumptions whatsoever about the finite element mesh that the problem arises from; it may be as unstructured as necessary and only the basic output from the mesh generator and the finite element discretisation are required as inputs to DOUG. The preconditioner can then be used within a range of iterative methods. Currently CG and BiCGSTAB are implemented, other methods of this type can be added. More details and the code itself may be found at http://www.maths.bath.ac.uk/~mjh/doug The development of this code was part of the UK Engineering and Physical Sciences Research Council Project GR/J88616 on Parallel Methods for Elliptic PDEs. Mark Hagger Department of Mathematics University of Bath Claverton Down Bath, BA2 7AY England mjh@maths.bath.ac.uk ------------------------------ From: Lutz Grosz Date: Tue, 11 Mar 1997 13:50:20 +1100 (EST) Subject: VECFEM, Version 3, is Released VECFEM (version 3) is released now ! VECFEM is a finite element solver for non-linear systems of boundary and initial boundary value problems on arbitrary 1D, 2D and 3D domains. Important features are * for parallel and vector computers * Tcl/tk-based graphical user interface * MAPLE-based code generator More informations are available at the URLs: http://www.uni-karlsruhe.de/~vecfem http://wwwmaths.anu.edu.au/~vecfem Lutz Grosz CMA/SMS, Australian National University (ANU), Canberra, Australia e-mail: lutz.grosz@maths.anu.edu.au ------------------------------ From: Ira Eick Date: Tue, 11 Mar 1997 20:02:48 -0500 (EST) Subject: Test Problems for Solution of 2-D Burger's Equation We are currently studying the numerical solution of the two dimensional Burger's Equation on the unit square with homogeneous boundary conditions for small values of the parameter epsilon. Our formulation of the problem follows: Let U be a vector function of u(x,y,t) and v(x,y,t) then U_t = epsilon (Lapacian(U)) - (U dot Del) U We would greatly appreciate information on any known solutions to be used as test problems for our results. Thanks very much for your assistance. Ira Eick Dept. of Math. and Stat. University of North Florida 4567 St, Johns Bluff Road South Jacksonville, FL 32216 e-mail: ijeick@aol.com ------------------------------ From: Siang Peng Oh Date: Tue, 11 Mar 1997 20:27:26 -0500 (EST) Subject: Tesselation of Sphere Does anyone know of the optimal way of tiling the sphere into a large number (N~10**6) of approximately equal area, equal angular size tiles? I am working on the Cosmic Microwave Background, and we would like to consider the optimal way of pixelizing the sky. Currently we inscribe one of the Platonic regular solids onto the sphere and pixelize the solid, but for various reasons it would be nice to have a grid which is as regular as possible in (theta,phi). I know an exact solution is not possible for N>20, but wonder if there is a close to optimal solution for integrating over the sphere. Many thanks, Siang Peng Oh (Peng) ------------------------------ From: Jeremy Levesley Date: Thu, 13 Mar 97 10:36:17 GMT Subject: Fast Fourier Transform on Sphere I am looking for an implementation of Driscoll and Healy's FFT on the sphere. Jeremy Levesley ------------------------------ From: Kendall Atkinson Date: Fri, 14 Mar 1997 16:35:55 -0600 (CST) Subject: Mathematical Foundations of Computer Graphics Mathematical foundations of computer graphics I am interested in suggestions or comments on books that would be suitable for a course with a title like "Mathematical Foundations of Computer Graphics". I realize this is not a numerical analysis question, strictly speaking, but much of the subject has a great deal of numerical analysis in it. I already know of a number of books, but most are fairly limited in some way. I want the course to be taught at the higher undergraduate to beginning graduate level. In case others are interested in this same topic, I will assemble any replies in a file which will be posted on my web site. Ken Atkinson University of Iowa ------------------------------ From: Wilfried Gansterer Date: Wed, 12 Mar 97 10:41:44 MEZ Subject: High Performance Fortran in Numerical Analysis Who is using HPF in Numerical Analysis? We are interested in HPF-codes for Cholesky-factorizations LU-decompositions (Gauss-Elimination) Algorithms for eigenvalue-problems. If you are working on HPF-codes for these topics or if you know of such activities , please contact us ! Harald Ehold Wilfried Gansterer Vienna University Vienna University of Technology ehold@vcpc.univie.ac.at ganst@titania.tuwien.ac.at ------------------------------ From: Robert A. van de Geijn Date: Fri, 14 Mar 1997 10:26:46 -0600 Subject: Parallel Linear Algebra Package PLAPACK Users' Guide Available PLAPACK (Parallel Linear Algebra PACKage) is a library infrastructure for the parallel implementation of linear algebra algorithms and applications on distributed memory supercomputers such as the Intel Paragon, IBM SP2, Cray T3D/T3E, SGI PowerChallenge, and Convex Exemplar. This infrastructure allows library developers, scientists, and engineers to exploit a natural approach to encoding so-called blocked algorithms, which achieve high performance by operating on submatrices and subvectors. This feature, as well as the use of an alternative, more application-centric approach to data distribution, sets PLAPACK apart from other parallel linear algebra libraries, allowing for strong performance and significantly less programming by the user. The PLAPACK Users' Guide, "Using PLAPACK: Parallel Linear Algebra Package" is now available from The MIT Press. For further information, see http://www.cs.utexas.edu/users/plapack http://mitpress.mit.edu/mitp/recent-books/comp/vanup.html or contact plapack@cs.utexas.edu Robert A. van de Geijn Taylor Hall 4.115C Associate Professor (512) 471-9720 (office) Department of Computer Sciences (512) 471-8885 (fax) The University of Texas rvdg@cs.utexas.edu Austin, Texas 78712 http://www.cs.utexas.edu/users/rvdg ------------------------------ From: Michael Breitner Date: Mon, 10 Mar 1997 16:12:32 +0100 (NFT) Subject: Temporary Address Change for Michael Breitner TEMPORARY ADDRESS CHANGE OF MICHAEL H. BREITNER I will be on leave from the Technische Universitaet Clausthal as visiting Assistant Professor at the UCSD until July 7, 1997. New temporary address: Dr. Michael H. Breitner Department of Mathematics University of California, San Diego 9500 Gilman Drive La Jolla, California 92093-0112 USA Fax: USA + 619 534 5273 Email: breitner@math.tu-clausthal.de (forwarded) URL: http://www.math.tu-clausthal.de/~mamhb ------------------------------ From: Adolfy Hoisie Date: Tue, 11 Mar 1997 09:35:44 -0500 (EST) Subject: Change of Address for Adolfy Hoisie I have moved from the Cornell Theory Center to the Los Alamos National Laboratory as of the beginning of March. My new coordinates are: Adolfy Hoisie Los Alamos National Laboratory Scientific Computing, CIC-19, MS 256 Los Alamos, NM 87545 hoisie@lanl.gov Phone: (505) 667-5216 ------------------------------ From: Robert Voigt Date: Mon, 10 Mar 1997 17:32:50 -0500 Subject: New Position for Robert Voigt As of March 1, 1997 I have assumed the position of Director of the Computational Science Cluster at the College of William and Mary. This is a part time position, and consequently, I will continue at the National Science Foundaton, also on a part-time basis. For the time being I can be best reached at rvoigt@nsf.gov and (703) 306-1900. When permanent communicaitons arrangements have been established at William and Mary, I will place another posting in na.digest. Bob Voigt ------------------------------ From: Joseph Grcar Date: Mon, 10 Mar 97 14:08:31 -0800 Subject: Congratulations to Margaret Wright and Cleve Moler Congratulations are due to Margaret Wright and to Cleve Moler on their election to the National Academy of Engineering. -- Joe ------------------------------ From: Michael Ferris Date: Tue, 11 Mar 1997 12:45:15 -0600 Subject: New Book on Complementarity and Variational Problems Dear Colleague, We are very pleased to announce the publication of a new book: COMPLEMENTARITY and VARIATIONAL PROBLEMS: State of the Art edited by Michael C. FERRIS University of Wisconsin, Madison Jong-Shi PANG The Johns Hopkins University published by Society of Industrial and Applied Mathematics March 1997 485 pages ISBN 0-89871-391-9 Please recommend this book to your library and/or any colleague who might have an interest in the subject of the book. For more information, consult the online catalog at http://www.siam.org. To order, call toll-free in USA 1-800-447-SIAM; outside USA call 215-382-9000; Fax 215-386-7999; Email: service@siam.org Thank you very much. Michael C. Ferris, Jong-Shi Pang. ------------------------------ From: Todd Veldhuizen Date: Tue, 11 Mar 1997 13:59:34 -0500 (EST) Subject: Object-oriented Numerics List Announcement: Object-Oriented Numerics List (oon-list). 1. Topic areas * scientific computing in object-oriented languages such as C++ and Fortran 90 * discussion of design, implementation, and performance issues * project, code, and book announcements * paper abstracts and bibliography entries 2. Intended audience * developers of object-oriented numerical libraries * researchers and application programmers 3. Format The list will be unmoderated for the time being. If the need arises, we'll switch to a moderated format. * oon-list Messages mailed individually (unmoderated) * oon-digest Weekly digest format (unmoderated) 4. Web site The Object-Oriented Numerics Web Site will provide: * a searchable archive of oon-list postings * bibliography * list of available software packages See: http://monet.uwaterloo.ca/oon/ 5. How to subscribe Send mail to majordomo@monet.uwaterloo.ca with subscribe oon-list your-email-address or subscribe oon-digest your-email-address as the body of the message. ------------------------------ From: Robert Schneiders Date: Fri, 14 Mar 97 10:04:37 +0100 Subject: Latest News in Mesh Generation Latest News in Mesh Generation "Mesh Generation and Grid Generation on the Web": http://www-users.informatik.rwth-aachen.de/~roberts/meshgeneration.html You can find the same list with hyperlinks there. If you can contribute to this column, please let me know (robert@feanor.informatik.rwth-aachen.de)! o Studentship at the department of mechanical engineering, University of British Columbia: Improvement and extension of existing triangular and tetrahedral mesh generators (contact Carl-Ollivier Gooch, cfog@mech.ubc.ca). Application deadline is March 31. o David Kornmann (david@stone.fi) announces SD, a fully dynamic constrained Delaunay triangulation engine for realtime triangulation. o Information on the 6th International Meshing Roundtable, October 13-15, 1997, Park City, Utah, is available online at http://sass577.endo.sandia.gov/~drwhite/6IMR/index.html. o Mesh2d and mesh3d, programs for triangular / tetrahedral mesh generation from Bilge Kaan Karamete(Kaan@rorqual.cc.metu.edu.tr), are available on the net. o There are new open positions for people with experience in mesh generation. o Bojan Niceno (niceno@univ.trieste.it) has announced his two- dimensional quality mesh generator Easymesh (generation of constrained Delaunay triangulations). o Mark Filipiak's (mjf@epcc.ed.ac.uk) technology watch report on mesh generation is available online at http://www.epcc.ed.ac.uk/epcc-tec/documents/tw-meshgen/. o Donald Hawken(dhawken@awinc.com) has announced a new version of the UGRID grid generator for 2D Euler or Navier-Stokes simulations. Demo software and a free grid-generating screen saver are available. o NASA's steering committee for surface modeling and grid generation has started to build a testcase library for surface modeling and grid generation. o QMG1.1, the new version of Stephen Vavasis' surface and volumetric grid generator, is available on the net (http://www.cs.cornell.edu/Info/People/vavasis/qmg-home.html). o The last issue of the Springer journal "Engineering with Computers" is all on mesh generation. o The proceedings of the 5th International Mesh Generation Roundtable and Conference 96, Pittsburgh, Pennsylvania, U.S.A. (1996), are available online at http://sass577.endo.sandia.gov:80/9225/ Personnel/samitch/roundtable96/accept-list.html. Robert Schneiders Lehrstuhl fuer Angewandte Mathematik, insb. Informatik RWTH Aachen Ahornstr. 55 52056 Aachen Germany email: robert@feanor.informatik.rwth-aachen.de WWW: http://www-users.informatik.rwth-aachen.de/~roberts/ Tel.: +241-804558 Fax: +241-8888215 ------------------------------ From: Jack Dongarra Date: Tue, 11 Mar 1997 16:14:35 -0500 Subject: BLAST Forum Minutes 2/27-28 BLAST Forum Minutes The existing BLAS have proven to be very effective in assisting portable, efficient software for sequential, vector and shared memory high-performance computers. A forum has been establish to consider expanding the BLAS in a number of directions in light of modern software, language, and hardware developments. On February 27-28, 1997 we held a BLAST Forum meeting in Dallas, TX. The minutes from that meeting are available on the BLAST Forum homepage: http://www.netlib.org/utk/papers/blast-forum.html We are planning another meeting of the Forum sometime in May hosted by Intel Corporation. If you would like to contribute to this ongoing discussion specific details can be found in the BLAST Forum homepage. Jack Dongarra ------------------------------ From: Pat Worley Date: Tue, 11 Mar 1997 11:58:00 -0500 (EST) Subject: Gordon Conference on High Performance Computing Note: The NA-Net community has been a part of this Gordon conference since its inception, and we feel that it is an interesting and important conference for numerical analysts and computational scientists involved in High Performance Computing and the NII. We apologize for the conflict with the SIAM Anniversary Meeting, but the scheduling was out of our control. We hope that those not planning on attending the SIAM annual meeting will consider applying to attend the Gordon conference. The 1997 Gordon Conference on High Performance Computing and Information Infrastructure: "Practical Revolutions in HPC and NII" Chair, Anthony Skjellum, Mississippi State University, tony@cs.msstate.edu, 601-325-8435 Co-Chair, Pat Worley, Oak Ridge National Laboratory, worley@msr.epm.ornl.gov, 615-574-3128 Conference web page: http://www.erc.msstate.edu/conferences/gordon97 July 13-17, 1997 Plymouth State College Plymouth NH The now bi-annual Gordon conference series in HPC and NII commenced in 1992 and has had its second meeting in 1995. The Gordon conferences are an elite series of conferences designed to advance the state-of-the-art in covered disciplines, and are characterized by non-commercial content, and forward looking talks. Speakers are assured of anonymity and referencing presentations done at Gordon conferences is prohibited by conference rules in order to promote science, rather than publication lists. Previous meetings have had good international participation, and this is always encouraged. Experts, novices, and technically interested parties from other fields interested in HPC and NII are encouraged to apply to attend. All attendees, including speakers, poster presenters, and session chairs must apply to attend. We encourage people who attend Gordon to stay for the entire week. More information on the conference will be found regularly at the web page listed above, including the emerging list of speakers and poster presenters. We *strongly* encourage all poster presenters to have their poster proposals in by May 13, 1997, though we will consider poster presentations up to six weeks prior to the conference. Application to attend the conference is also six weeks in advance. Information on applying for attendance may be found on the web site. Speakers must pay the registration fee. Speaker reimbursement for certain fees will be established at least six weeks prior to the meeting in consultation with the conference chair. ------------------------------ From: Rodney Coleman Date: Wed, 12 Mar 1997 16:13:39 +0100 (MET) Subject: Symposium on Differential-Algebraic Equations SYMPOSIUM ON DIFFERENTIAL-ALGEBRAIC EQUATIONS: ALGEBRAIC AND NUMERICAL ASPECTS GRENOBLE (FRANCE), MAY 26-28, 1997 The objective of this symposium is to bring together researchers, from various fields, actively involved in the area of Differential-Algebraic Equations (DAE). The study of DAE involves many disciplines: simulation of physical phenomena, differential geometry, numerical integration on manifolds, symbolic computing, differential algebra, etc. Through talks and open discussions we aim to encourage cross-fertilization between these different areas. For this reason papers making openings between disciplines would be very welcome. This symposium should also be the occasion to review the state of the art in the field. The symposium is organized by the Computer Algebra Team of the Laboratoire de Modelisation et Calcul, Institut de Mathematiques Appliquees de Grenoble (LMC_IMAG). THEMES Mathematical tools (index, canonical forms, singularities ...). Algebraic algorithms and computation. Numerical methods. Software for the analysis and integration of DAE's. Applications (physics, mechanics, chemistry, control ...). SCIENTIFIC COMMITTEE S.L. Campbell - N. Carolina State U. (USA) J. Della Dora - LMC-IMAG (F) B.J. Leimkuhler - U. of Kansas (USA) J. Tuomela - Helsinki U. of Technology (SF) V. Gerdt - Nuclear Research Institute, Dubna (RU) INVITED SPEAKERS S.L. Campbell (N.Carolina State U.) B.J. Leimkuhler (U. of Kansas) S. Reich (Konrad-Zuse Zentrum, Berlin) R. Marz (Humboldt U., Berlin) CONTRIBUTIONS We invite authors to send a one page abstract or a full paper (10 pages maximum) before 18th April 1997. INFORMATION For information please contact: DAE 97 -- R. Coleman Equipe de Calcul Formel Laboratoire LMC 51 Av. rue des Math\'ematiques BP 53 F38041 Grenoble Cedex Tel.: (+) 33 4 76 51 43 95 Fax: (+) 33 4 76 62 12 63 E.m.: dae97@imag.fr www: http://www-lmc.imag.fr/dae97 ------------------------------ From: Ken Jackson Date: Wed, 12 Mar 1997 11:54:11 -0500 Subject: Southern Ontario Numerical Analysis Day The Fifteenth Annual Southern Ontario Numerical Analysis Day will be held on Wednesday, 30 April 1997, in the Computer Science Department of the University of Toronto. We expect that the meeting will begin at about 9:30 a.m. and end at about 5:00 p.m. There will be a short reception afterwards. We will post the schedule for the meeting on our web page by about April 16. The distinguished speaker for the day is Professor Bob Russell of the Mathematics Department of Simon Fraser University. Bob will give a one-hour talk on "A Moving Mesh Method for Higher Dimensional PDEs". In addition, there will be contributed talks of 30 minutes each, and possibly also some poster sessions (depending on the number of talks submitted). All contributed talks will be given in the plenary session; there will be no parallel sessions. Interested persons are invited to submit a title and abstract for consideration by March 31. Talks in all areas of numerical analysis / scientific computing will be considered. In keeping with our tradition, we encourage graduate students to give contributed talks. There is no registration fee for the conference, but we request that you register by April 21 so that we will know how many people to expect at the meeting and so that we will be able to make-up name tags etc. For more information on NA Day and to register for the meeting, see our web page http://www.cs.utoronto.ca/~naday If you do not have access to the web, email us at naday@cs.utoronto.ca ------------------------------ From: Simona Lilliu Date: Thu, 13 Mar 1997 15:37:57 +0100 Subject: Course on Nonlinear Hyperbolic Equations Course on Advanced Numerical Approximation of Nonlinear Hyperbolic Equations 23-28 June 1997 Cetraro (Cosenza) - Italy Course Director Alfio Quarteroni Politecnico di Milano Lecturers Bernardo Cockburn University of Minnesota, Minneapolis, USA Claes Johnson Chalmers University of Technology, Goteborg, Sweden Chi-Wang Shu Brown University, Providence, USA Eitan Tadmor UCLA and Tel Aviv University FOR INFORMATION AND APPLICATION FORM SEE WEB PAGE: http://www.crs4.it/~alfio/cime.html http://www.math.unifi.it/~cime/1997/13.html Fondazione C.I.M.E. Centro Internazionale Matematico Estivo International Mathematical Summer Center Simona Lilliu Secretary of Scientific Research Division - CRS4 Via Nazario Sauro,10 - 09123 Cagliari Voice: +39 70 2796300 Fax: +39 70 2796302 simona@crs4.it http://www.crs4.it/~simona ------------------------------ From: Edit Kurali Date: Thu, 13 Mar 1997 12:54:48 -0500 (EST) Subject: Contents, Journal of Approximation Theory Table of Contents: J. Approx. Theory, Volume 88, Number 3, March 1997 Jeffrey J. Holt A class of extremal functions and trigonometric polynomials 275--303 Eugenii Shustin Interpolation by convex algebraic hypersurfaces 304--315 Franz Peherstorfer and Robert Steinbauer Asymptotic behaviour of orthogonal polynomials on the unit circle with asymptotically periodic reflection coefficients 316--353 Amiran Ambroladze and Hans Wallin Pad\'e type approximants of Markov and meromorphic functions 354--369 Vittoria Demichelis Convergence of derivatives of optimal nodal splines 370--383 Addendum 384 Author index for Volume 88 385 ------------------------------ From: Maya Neytcheva Date: Thu, 13 Mar 1997 18:55:55 +0100 (MET) Subject: Conference on Preconditioned Iterative Solution Methods SECOND ANNOUNCEMENT Conference on Preconditioned Iterative Solution Methods for Large Scale Problems in Scientific Computations PRISM'97 May 27-29, 1997, University of Nijmegen, The Netherlands TOPICS COVERED INCLUDE preconditioned iterative solution methods for - second and fourth order elliptic scalar equations and systems of equations - mixed variable variational problems - nonselfadjoint problems and indefinite matrix problems - inner-outer iteration methods - parallel implementations, efficiency measures, scalability - robust implementations, i.e. convergence uniform with respect to meshsize parameter and singular perturbation parameters - applications for Navier's equations and Stokes problem - applications for nonlinear problems, such as electromagnetic field, plastic flow, Navier-Stokes, and Miscible displacement problems - Biomechanical applications; Helmholtz equation and applications in Computer Tomography. CALENDAR: Deadline for submission of full papers: April 2, 1997. Referee reports and notification of acceptance: May 2, 1997. REGISTRATION: Before April 12, 1997 - f. 450. At the registration desk - f. 600 (currently \$ 350). For students and Ph.D students, f. 350 and f. 500, respectively. Updated details regarding submission of papers, speakers, etc. can be obtained directly from http://www-math.sci.kun.nl/math/summer97 or by contacting the organizers: PRISM'97 attn. O. Axelsson or M. Neytcheva Department of Mathematics Toernooiveld 1, NL-6525 ED Nijmegen, The Netherlands e-mail: summer97@sci.kun.nl fax: +31 (0)24 3652140 ------------------------------ From: B J Leimkuhler Date: Fri, 14 Mar 97 12:23:24 GMT Subject: Symposium on Algorithms for Macromolecular Modelling ANNOUNCEMENT Limited financial assistance is available for younger researchers to attend the 2nd International Symposium on Algorithms for Macromolecular Modelling, Berlin, May 21-24, 1997. The symposium will be held May 21-24, 1997 at the Konrad Zuse Center in Berlin. The meeting will bring together scientists from various branches of (applied) mathematics, physics, chemistry, and biology who have been dealing with molecular dynamics and molecular modelling. The broad purposes of the symposium are (i) to provide an international forum for communicating state-of-the-art developments in molecular modelling algorithms, and (ii) to improve the prospects for future international collaborations by emphasizing the involvement of younger scientists from both sides of the Atlantic. Symposium topics: * Advanced timestepping in molecular dynamics * Quantum-classical dynamics * Free energy and ensemble caculations * Structure determination * Electrostatics Confirmed Invited Speakers: H.J.C. Berendsen (Groningen) B. Lesyng (Warsawa) B.J. Berne (New York) Ch. Lubich (Tuebingen) J. Board (Duke) A. Mark (Zuerich) B.R. Brooks (Bethesda) M. Parrinello (Stuttgart) R. Elber (Jerusalem) H. Scheraga (Cornell) R.B. Gerber (Jerusalem) T. Schlick (New York) H. Grubmueller (Munich) K. Schulten (Urbana) W.F. van Gunsteren (Zuerich) Ch. Schuette (Berlin) J. Hermans (Chapel Hill) D. Shalloway (Cornell) K. Kuczera (Lawrence) R.D. Skeel(Urbana) B. Leimkuhler (Lawrence) J. Straub (Boston) W. Yang (Duke) This meeting is being sponsored jointly by the US National Science Foundation, The German Research Federation and the Konrad Zuse Center. A world wide web site for the meeting has been established at location "http://elib.zib-berlin.de:88/MacroMM97/". Some funds have been allocated to encourage younger US-based researchers to attend this meeting. The amount per researcher will be adequate to cover local living expenses in Berlin during the meeting (about $500). Eligibility: PhD students, Postdocs, and pre-tenure faculty at US research institutions, whose research is related to the themes of the meeting. Applications from women scientists and members of under-represented ethnic groups are especially encouraged. Application Procedure: Send a *brief* email, containing at most about 200 words, describing your qualifications and reasons for wanting to attend the meeting. Include the name and electronic (email) address of one reference. Applications will be considered successively on the first of each month until all funds allocated for this purpose have been distributed. Please use the following email address for applications and inquiries: berlin@math.ukans.edu. ------------------------------ From: Ed Overman Date: Fri, 14 Mar 1997 09:48:43 -0500 (EST) Subject: Euler Equations, Navier Stokes Equations, and Singularities We are organizing a conference at the Ohio State University with the title "The Euler Equations, Navier Stokes Equations, and Singularities" for the dates April 18-20, 1997. We enclose a description of this conference which we ask you to post in your department and share with interested faculty and students. Sincerely yours, George Majda Ed Overman Conference on The Euler Equations, Navier Stokes Equations, and Singularities Department of Mathematics The Ohio State University April 18-20, 1997 This conference will provide an interactive scientific forum between theoreticians, computational scientists, and experimentalists on singularity formation in the incompressible Euler equations and the possible regularization by the Navier-Stokes equations. Singularities are either known or believed to occur in many problems involving incompressible, ideal fluids including the evolution of vortex sheets, Hele-Shaw interfaces, and droplet formation in thin jets. The last example is a specific instance of singularity formation as a precursor to the general property of topological change. Similar phenomena also happen in the evolution and formation of bubbles. Any model of a problem with anticipated singularity formation is extremely challenging, whether the problem is studied analytically, experimentally, or numerically, due to the development of arbitrarily small scales. If a singularity forms, it often indicates that a model for a given physical phenomenon is incomplete or inadequate. In this situation, an important regularizing effect such as, but not limited to, viscosity is usually omitted in the formulation of the problem in order to simplify the model. Therefore, a modeler is challenged to obtain the missing physical mechanism and to incorporate this missing mechanism into the system of equations which describe the problem. We hope to expose the participants to a wide range of problems and to an understanding of the various approaches to solving them. The theme of this conference is to bring theoreticians, computational scientists, and experimentalists together to provide a forum for interaction among different research groups. Invited Speakers Ann Almgren (Lawrence Berkeley National Laboratory) Andrea Bertozzi (Duke University) Michael Brenner (MIT) Peter Constantin (University of Chicago) Steven Cowley (Cambridge University) Weinan E (Courant Institute) John D. Gibbon (Imperial College (London)) John Greene (General Atomics Company (San Diego)) Diane Henderson (Pennsylvania State University) Robert Kerr (National Center for Atmospheric Research) Jian-Guo Liu (Temple University) Andrew Majda (Courant Institute) Anatol Roshko (California Institute of Technology) Mike Shelley (Courant Institute) Tom Sideris (University of California at Santa Barbara) Michael Siegel (New Jersey Institute of Technology) Esteban Tabak (Courant Institute) Jiahong Wu (Institute for Advanced Study)} Please see our web page http://www.math.ohio-state.edu/Events for further details and for registration information. Conference Organizers: George Majda (majda@math.ohio-state.edu) Ed Overman (overman@math.ohio-state.edu) ------------------------------ From: Manuel Salas Date: Fri, 14 Mar 1997 15:09:10 -0500 Subject: Symposium on Modeling Complex Turbulent Flows ICASE/LaRC/AFOSR SYMPOSIUM ON MODELING COMPLEX TURBULENT FLOWS AUGUST 11-13, 1997 RADISSON HOTEL, HAMPTON, VA Despite centuries of research, many mysteries of turbulence remain unsolved and the phenomenon defies quantification to even engineering accuracy. The advent of supercomputers has shifted the focus of turbulence research from modeling to direct numerical simulations (DNS). It is, however, unlikely that DNS will become an affordable engineering tool in the foreseeable future. Turbulence modeling continues to be an important challenge to computing engineering flows. Exacting requirements for the design of advanced flight vehicles, supersonic combustors, and long-term weather prediction capability, to name a few examples, demand the development of sophisticated turbulence models for complex flows. The purpose of this symposium is to bring together leading researchers in the field of turbulence modeling to (i) evaluate recent progress in modeling, and (ii) anticipate future modeling requirements and preview future research directions. Those interested in attending or if you would like further details, please e-mail the following information to Emily Todd by May 2, 1997: Name and title; address; telephone; fax; and your field(s) of interest. A detailed agenda and relevant information will be posted on the Web at: http://www.icase.edu/workshops/TMS.html Emily Todd, Conference Manager ICASE, Mail Stop 403 NASA Langley Research Center Hampton, VA 23681-0001 Telephone: (757) 864-2175; FAX: (757) 864-6134; E-mail:emily@icase.edu ------------------------------ From: Yves Tourigny Date: Sat, 15 Mar 1997 11:55:36 GMT Subject: Bristol/Bath Numerical Analysis Day BRISTOL/BATH NUMERICAL ANALYSIS DAY (MARCH 27th) Everyone interested in numerical analysis and computational mathematics is invited to attend a day of informal talks given by members of the Universities of Bath and Bristol. The guest speaker is Professor M.J. Baines (Reading) who will talk on "Recent advances in adaptive relocation methods". Talks will also be given by Steve Benbow, Gordon Collins, Ivan Graham, Richard Kerswell, Gabriel Lord and Nigel Mottram. The meeting will take place on March 27th in the School of Mathematics of the University of Bristol, University Walk, Bristol, UK, starting at 10:30. THERE IS NO FEE OR CHARGE FOR ATTENDANCE. For further information, consult the Web page at the URL http: //zeus.bris.ac.uk/~mayt/naday.html or contact Yves Tourigny (Y.Tourigny@bris.ac.uk, tel: 0117 928 8630). ------------------------------ From: Yuefan Deng Date: Mon, 10 Mar 1997 19:21:04 -0500 Subject: Postdoctoral Positions at Stony Brook State University of New York at Stony Brook Department of Applied Mathematics and Statistics The department expects to have two or more postdoctoral positions in computational applied mathematics available for the 1997-98 academic year (or sooner). Qualified candidates should have computational experience in one or more areas of: fluid dynamics, parallel computing, hyperbolic conservation laws, elastic and plastic deformation, or flow in porous media. Applicants should send vita, descriptions of research interests, and three recommendation letters to: James Glimm, Chair, Department of Applied Mathematics and Statistics, SUNY at Stony Brook, Stony Brook, NY 11794-3600. SUNY at Stony Brook is an equal opportunity/affirmative action employer and educator and encourages applications from women and minorities. ------------------------------ From: P. Wesseling Date: Tue, 11 Mar 1997 11:16:07 +0100 (MET) Subject: Graduate Research Assistentship at Delft University of Technology The Section Numerical Analysis is seeking a PhD student to work on the project "Numerical methods for computational fluid dynamics on unstructured grids" The Section Numerical Analysis has developed methods to compute flows with high accuracy and efficiency on structured but strongly nonuniform and nonorthogonal staggered grids. To increase industrial applicability it is desirable to include unstructured grids. It turns out that the structured grid method that has been developed can be extended to unstructured grids. The purpose of the project is to study this further and to demonstrate the feasibility of the approach on industrial test cases. The project is part of the research program of the J.M. Burgers Center, the national Graduate School for Fluid Dynamics. Candidates are sought with a Master's degree in applied mathematics with experience in numerical analysis and mathematical physics, or in related disciplines with experience in scientific computing and theoretical fluid dynamics. The PhD student will be employed by the Faculty of Technical Mathematics and Informatics for a period of four years. The project should lead to the doctoral degree. The monthly salary starts at HFL 2114, with annual increases to HFL 3775 in the fourth year. Applications are to be received before May 1, 1997, and should include a summary of the study program, grades received, resume and at least one letter of reference. Applications can be submitted through regular mail, mentioning ref TWI9701.We on the envelope and on the application, to Mr. W.A. Maertens P&O Office Faculty of Technical Mathematics and Informatics P.O. Box 356, NL-2600 AJ Delft, The Netherlands ------------------------------ From: Bengt Asvall Date: Tue, 11 Mar 1997 15:17:09 +0100 Subject: Postdoctoral Position at University of Bergen Postdoctoral appointment at University of Bergen, Norway (http://www.parallab.uib.no/projects/strategic/postdoc.html). For application details, contact Ms. Synnove.Palmstrom@ii.uib.no; or, for other information, the principal investigators, {Bengt.Aspvall, Petter.Bjorstad, Hans.Munthe-Kaas}@ii.uib.no. The closing date for applications is <<< April 1 >>>. ------------------------------ End of NA Digest ************************** -------