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Mathematics Archives Newsletter #4
Posted:
Jul 30, 1992 12:52 PM


* * * * * * * * * * * * * * * * * * * * * * * * * * * * * MATHEMATICS ARCHIVES UPDATES July 30, 1992 * * at WUARCHIVE.WUSTL.EDU Update #4 * * Moderators: * * mac  Earl D. Fife, Dept. Mathematics * * Calvin College, Grand Rapids, MI * * fife@CALVIN.EDU * * msdos  Larry Husch, Dept. Mathematics * * University of Tennessee, Knoxville, TN * * husch@WUARCHIVE.WUSTL.EDU * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
The following is a list of recent additions and lisitings of msdos software in Mathematics Archives. Instructions for downloading files are given at the end of this article. If you are unfamiliar with ftp and/or decompressing files or if you do not have access to ftp and want information on downloading and uncompressing files, drop a note to Larry Husch asking for this information.
 num202c.zip (number.theory)
NUMBERS Calculator Ivo Duentsch Rechenzentrum Univ. Osnabruck Postfach 4469 W4500 Osnabruck GERMANY Email: duentsch@dosuni1.bitnet
The NUMBERS calculator is designed to facilitate the computation of number theoretic functions for positive integers of up to 150 decimal digits on almost any PC. The author's main objective in writing NUMBERS was to allow students in a course in elementary number theory to do nontrivial examples and pursue investigative projects. Included operations are finding gcds, lcms, mod arithmetic, quadratic residue test, Chinese remainder systems, number of divisors, sum of divisors various pseudoprime tests, continued and Farey fractions, Fibonacci numbers, Lucas numbers, encryption and decryption, etc. A collection of object files which can be linked into a Turbo Pascal program are provided. (adapted from the documentation)  aliquot.zip (number.theory, dynamics)
Aliquot Ivo Duentsch Rechenzentrum Universitat Osnabruck Germany Bitnet: duentsch@dosuni1 Internet: duentsch@dosuni1.rz.uniosnabrueck.de
A tool to compute aliquot chains with small starting numbers and keep a record of the results. For a positive natural number n, let s(n) denote the sum of its proper divisors. The sequence obtained by iterating s for some n is called an aliquot sequence or chain. (adapted from the documentation)  isetl.zip isetldoc.zip isetlsrc.zip (discrete.math)
ISETL
ISETL (Interactive SET Language) is an interactive mathematical language, based on the mathematical notion of a set (finite). It was developed at Clarkson University by Gary Levin. ISETL supports the following simple data types: integer, floatingpoint, boolean, string, atom, file, undefined, and the compound data types: set, tuple, map, func. All objects are "firstclass" in the sense that they can be passed into functions and returned by functions. Version 3.0 was released in 1990. To obtain MSDOS, Macintosh versions, source code, documentation, and guidebook, contact Ron Pullins, Editor, West Educational Publishing, 5083886685. For more information, consult the references: Nancy Baxter, Ed Dubinsky, Gary Levin, "Learning Discrete Mathematics with ISETL", Springer Verlag (NY), 1989. Donald L. Muench, "ISETLInteractive Set Language", Notices of American Math. Society, (37),3, March 1990, 277279.
isetl.zip contains the executable file. isetldoc.zip contains some documentation. isetlsrc.zip contains the source code.
The ISETL newsletter can be obtained from Don Muench who can be reached at isetl@sjfc.edu.  spectr20.zip (modelling, numerical.analysis)
SPECTRUM 2.0 Dr. David E. Hess Mechanical Engineer, Fluid Flow Group National Institute of Standards and Technology Building 230 Room 105 Gaithersburg, MD 20899 hess@enh.nist.gov
This program was developed for use with the ongoing Compliant Surface Program in the Fluid Flow Group; this group is a part of the Process Measurements Division at the National Institute of Standards and Technology. Analogue data is collected and digitized with an A/D converter. Having then a collection of digitized time series which reside in the computer, this program calculate amplitude density, autospectral (power) density and crossspectral density functions from these input time series. The resulting frequency (or wavenumber) data are useful in many engineering fields. The program is written in FORTRAN and will run on any (286 or better) PC. The program is accompanied by a 73page user manual and a 19page update. The source code and a variety of utility programs are also included. The program has been extensively tested and the author believes it to be bugfree. The source code is well documented and many of the techniques employed may be found in the excellent book: Random Data, 2nd Ed., Bendat & Piersol, Wiley, 1986. The documentation was originally prepared on a wordprocessor. Unfortunately, the equations and graphs do not survive the conversion process into an ASCII file. Any interested person contact the author directly for FREE hard copies of the documentation.  lp100210.zip (discrete.math)
LP100 Cornel Huth San Antonio, TX 78238
LP100 is a linear programming optimizer developed for either maximizing or minimizing small to medium sized mathematical programming problems in which all the relationships between variables are linear. It finds a BEST feasible solution to any continuous or allinteger constrained optimization problem of this type and reports on the activities and levels required to maximize profit or minimize cost. LP100 also reports on alternate optima, shadow prices, and ranges over which the shadow prices are valid and also ranges over which profit/cost inputs and righthandside (RHS) values can vary without altering the solution. LP100 is shareware. (from the documentation)  The random number generating program ultra101.zip has been upgraded and has been renamed fsultra1.zip and appears in the miscellaneous subdirectory.  WUARCHIVE at Washington University at St. Louis is now a site for the storage of public domain and shareware software and other materials which can be utilized in the teaching of mathematics at the college and university levels.
To access these files, use anonymous FTP to wuarchive.wustl.edu, switch to the subdirectory /edu/math/msdos if you are interested in software which can be used on msdos computers or switch to the subdirectory /edu/math/mac for software which can be used on macintosh computers. Change to the subdirectory which is the subject area for which you would like to obtain software. In each subject area there is a file 00info.txt which contains a listing of all programs in the area together with a short abstract similar to the above abstracts.
If you have any comments, suggestions about, problems with, etc. the Mathematics Archives, please contact one of the moderators (macintosh) Earl Fife at fife@calvin.edu or (msdos) Larry Husch at husch@wuarchive.wustl.edu If you want to be added to the mailing list of this newsletter please send your email address to Larry. If you would like to submit program(s) and/or other appropriate material then get in contact with Earl or Larry for details.
From ENGELK@AC.GRIN.EDU Sun Aug 2 19:39:05 1992 Unsubscribe calcreform
Kevin Engel Grinnell College (Iowa) engelk@grin1.bitnet engelk@grin.edu



