Subject: NA Digest, V. 93, # 30 NA Digest Sunday, August 15, 1993 Volume 93 : Issue 30 Today's Editor: Cleve Moler The MathWorks, Inc. moler@mathworks.com Today's Topics: Teaching Symbolic Computations MATLAB Primer Garcia's Request on Air Pollution Address Changes for Jesse Barlow and Hongyuan Zha Scottish Computational Mathematics Symposium 1993 Workshop on ODE's Arising in Chemistry 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: John Mathews Date: 10 Aug 1993 07:00:06 -0800 (PST) Subject: Teaching Symbolic Computations Teaching Symbolic Computations I would appreciate feedback about using computer algebra software (CAS), in teaching Numerical Analysis to undergraduate students. Is there an interest in teaching CAS in Numerical Analysis? Should there now be a component on using software such as MAPLE, Derive, MACSYMA or Mathematica in the student computer laboratory exercises? Should students be taught to use CAS to derive some of the formulas involved in numerical analysis? (Such as interpolation, integration...) Should any computations be done in rational arithmetic compared to decimals? If you have had experience using CAS or are interested in it, I would appreciate your correspondence. Best Regards, John Mathews Dept. of Mathematics Calif. State Univ. Fullerton Fullerton, CA 92631 e-mail mathews@fullerton.edu ------------------------------ From: Kermit Sigmon Date: Tue, 10 Aug 93 14:46:23 EDT Subject: MATLAB Primer MATLAB Primer This is to remind users of the MATLAB Primer that the latest version is available via anonymous ftp from: math.ufl.edu in the directory pub/matlab The following files are currently available: primer.tex Plain TeX source of the second edition primer.ps PostScript file for the second edition primersp.tex Plain TeX source of the Spanish version of the 2nd ed. primersp.ps PostScript file for the Spanish version of the 2nd ed. You are advised to download the appropriate file since it contains a new copyright clearance statement as well as a few minor revisions to the one you probably now have. In fact, you are advised to download anew the latest version each term since minor improvements and corrections may have been made. While the second edition of the Primer is based primarily on version 3.5 of MATLAB, it is compatible with version 4.0 with the fundamental differences noted. An edition of the Primer based on version 4.0 is, however, under development. You will be informed here when is becomes available. As many of you know, the MATLAB Primer was written to help students begin to use MATLAB. It is intended to serve as an introduction to and *not* a manual for MATLAB. While its primary purpose is for use in courses which require use of MATLAB, it could, of course, serve as an introduction to MATLAB for others. It is intended to be distributed via a local copy center. Kermit Sigmon Department of Mathematics sigmon@math.ufl.edu University of Florida ------------------------------ From: Zahari Zlate v Date: Wed, 11 Aug 93 15:23:13 +0200 Subject: Garcia's Request on Air Pollution In the last issue of the NA Digest, Gustavo Montero Garcia sent a request about finite element discretization of air pollution models (together with some other finite element applications). We are also interested in these topics. Therefore we shall be very grateful if all answers sent to Garcia are also forwarded to us. Our e-mail addreses are bneta@moon.math.nps.navy.mil (Beny Neta) and luzz@sun2.dmu.min.dk (Zahari Zlatev) Thank you very much in advance. ------------------------------ From: Jesse Barlow Date: Fri, 13 Aug 1993 10:01:20 -0400 Subject: Address Changes for Jesse Barlow and Hongyuan Zha Address changes for Jesse Barlow and Hongyuan Zha. The computer science department at Penn State has been combined with the computer engineering program and moved to a new building. The new addresses are Department of Computer Science and Enginnering 220 Pond Laboratory The Pennsylvania State University University Park, PA 16802-6106 FAX: 814-865-3176 Dept. Phone: 814-865-9505 Office addresses and phones Jesse Barlow 312 Pond Lab 814-863-1705 barlow@cse.psu.edu Hongyuan Zha 307 Pond Lab 814-863-0608 zha@cse.psu.edu The phone numbers are unchanged. Jesse Barlow. ------------------------------ From: Dugald Duncan Date: Wed, 11 Aug 93 09:21:04 +0100 (BST) Subject: Scottish Computational Mathematics Symposium 1993 SECOND ANNOUNCEMENT + CALL FOR POSTERS SCOTTISH COMPUTATIONAL MATHEMATICS SYMPOSIUM 1993 10am-5pm Monday 13th September Hume Tower, University of Edinburgh, Scotland. PROGRAMME * V. Stanley (NAG Ltd.) Introduction to the AXIOM computer algebra system. (AXIOM will be demonstrated during the breaks.) * J.C. Eilbeck (Heriot-Watt University) Quantum mechanics, Mathematica and the eigenvalues of tridiagonal matrices. * A.J. Wathen (University of Bristol) The convergence of preconditioned Krylov--subspace iterations for the Stokes and Navier-Stokes equations. * K.W. Morton (University of Oxford) Cell vertex methods for steady systems of conservation laws. * D.J. Higham (University of Dundee) Global errors in numerical time-stepping. POSTERS: Space for posters is limited so please contact the organisers at the address below as soon as possible (and certainly before the end of August) if you intend to submit one. SCOTTISH COMPUTATIONAL MATHEMATICS SYPOSIUM: This is the second meeting in the series organised by D.B. Duncan (Heriot-Watt University) and D.M. Sloan (University of Strathclyde) with the aim of bringing together mathematicians and others who develop and/or use computer algorithms to solve mathematical problems. The meetings are open to everyone interested and this one is supported financially by the London Mathematical Society. REGISTRATION & INFORMATION: To register, send a cheque for 15 pounds payable to Heriot-Watt University and include your address so that we can contact you. The fee includes tea & coffee breaks and lunch. If possible, please register before the end of August so that we can arrange the catering. To register or to obtain further information please contact: Dr. Dugald Duncan, Department of Mathematics, Heriot-Watt University, Edinburgh, EH14 4AS. e-mail: dugald@cara.ma.hw.ac.uk. ------------------------------ From: Zahari Zlatev Date: Wed, 11 Aug 93 14:37:35 +0200 Subject: Workshop on ODE's Arising in Chemistry Here is the announcement for an informal workshop concerning some important topics that are of interest for air pollution modellists, chemists and numerical analysts working in the field of numerical solution of stiff ODE's. The National Environmental Research Institute, where the workshop will take place, is located not far from Copenhagen. Best regards, Zahari Zlatev WORKSHOP ON THE NUMERICAL TREATMENT OF THE CHEMICAL PART OF LARGE AIR POLLUTION MODELS Date: November 19 1993 Place: National Environmental Research Institute Frederiksborgvej 399, DK-4000 Roskilde, Denmark The chemical reactions are an important part of any air pollution model. The reliability of the concentrations calculated by the model depends strongly on the accuracy of the numerical methods used in the treatment of the chemical reactions. The requirement for accurate methods is absolutely necessary, but unfortunately not sufficient. The systems of ordinary differential equations (ODE's) that appear when the chemical reactions are described mathematically are normally very stiff and very badly scaled. Therefore not only should the numerical methods be accurate, but it should also be possible to carry out the integration by using large time-steps. Finally, the discretization of the air pollution models leads to huge computational problems; it is not uncommon that millions of equations have to be treated numerically during many time-steps. This fact implies a third requirement: the numerical methods should be suitable for high-speed computers. Thus, the modern large air pollution models can be treated numerically only if accurate and fast numerical methods that perform well on parallel and vector machines are used in the chemical part. The main purpose with this workshop is to bring together physisists working with large air pollution models and specialists in solving stiff ODE's. The hope is that in the discussions some promising classes of numerical methods for the chemical parts of the existing large air pollution models will be selected and further experiments with these methods will be planned. A limited number of papers will be selected for the workshop. If you want to present a paper and/or to attend the workshop contact (no later than October 25 1993): Zahari Zlatev e-mail: luzz@sun2.dmu.min.dk, fax: +45 4630 1212, phone: +45 4530 1149 There will be no conference fee, but the number of participants will be limited (to no more than 30, and preferrably less than 30). We can assist you in the reservation of hotels. A tentative program with the talks at the workshop will be sent to the participants in the beginning of November 1993. ------------------------------ End of NA Digest ************************** -------