 Summer Mathematics Program for Women Undergraduates  Carleton/St. Olaf Colleges
An NSF/NSA funded program to encourage and support women in their study of mathematics. Goals include: introducing students to new areas of mathematics; honing students' mathematical reasoning, proof writing, problem solving, and presentation skills;
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 Summer Program for Women in Mathematics  Dept. of Mathematics, The George Washington University
A fiveweek intensive program for mathematicallytalented undergraduate women who are completing their junior year and may be contemplating graduate study in the mathematical sciences. Goals of this program are to communicate an enthusiasm for mathematics,
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 Sum of squares  Dario Alpern
An applet that decomposes any integer number up to 1000 digits long into a sum of four or less perfect squares.
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 Sundry Algebraic Geometry and Commutative Algebra Sites  B. Harbourne
A list of links to personal home pages of mathematicians working in algebraic geometry.
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 Super Bowls and Stock Markets  Ivars Peterson (MathTrek)
The Super Bowl "theory" links U.S. stock market performance to the results of the championship football game held each January since 1967. It holds that if a team from the original National Football League wins the title, the stock market
increases
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 Superliminal  Daniel Green
Use the Tyler applet to create polygons of various sizes and attach them to edges of other polygons. Read about deltahedra, flexible polyhedra, and infinite polyhedra  figures made of an infinite number of polygons which would then fill all of space
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 Supermarket Math  Keith Devlin (Devlin's Angle)
Is it really possible to acquire skills  mathematical or otherwise  in a decontextualized fashion in a classroom setting, then make use of those skills in any reallife situation that may require them? The assumption that this is indeed possible is
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 Surface Distance Between Two Points of Latitude and Longitude  John A. Byers, United States Department of Agriculture  Agricultural Research Service
Enter the latitude and longitude of two points on Earth, and this JavaScript program returns the distance between the locations in kilometers, miles, and nautical miles. Similarly, calculate the great circle distances between over 300 cities. Download
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 Surface Plotter  Yanto Suryono
A Java applet that plots surfaces defined by explicit twovariable mathematical functions (i.e: z = f(x,y)). Surfaces thus plotted may be rotated in any direction.
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 Surfaces Beyond the Third Dimension  Thomas Banchoff
A site that documents an art exhibit hosted by the Providence, Rhode Island Art Club in 1996, featuring computergenerated artwork designed by Tom Banchoff in collaboration with Davide Cervone (now at Union College) and student associates at Brown University.
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 SURFSTAT australia  Keith Dear; National Centre for Epidemiology and Population Health, The Australian National University
An online text in introductory Statistics from the University of Newcastle. Contents: Summarizing and Presenting Data (Types of Variate; Presenting Discrete and Continuous Data; Charactistics of a Distribution; Measures of Central Tendency and Variability;
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 Survey of the Classes of 1997 Concerning Their High School Math Programs and How Well These Programs Prepared Them for College Math  Gregory F. Bachelis
A Bloomfield Hills School District (BHSD; Oakland County, Michigan) survey comparing the college performances of high school students with differing high school math programs, particularly in response to the the advent of the CorePlus Mathematics Project
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 A Survey of Venn Diagrams  Frank Ruskey; Dept. of Computer Science, Univ. of Victoria, B.C., Canada
Facts and figures about Venn diagrams, particularly as they relate to combinatorial properties of the diagrams: Who was John Venn? What is a Venn diagram? Formal definition of Venn diagrams; General constructions of Venn diagrams. Also Graphs associated
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 Surviving College Algebra  Eric Saunders
A book intended to simplify college algebra for struggling students.
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 Swiss Mathematical Society
Membership information; conferences, jobs, news.
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 SyllabusWeb  Syllabus Press, Inc.
From the publishers of Syllabus Magazine, a technology magazine for high schools, colleges, and universities. Highlights of recent issues of the magazine and full text archives of all Press publications. The June 1995 issue covers telecommunications and
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 Syllogism 1.0  Ben Sharvy
Software to download. Enter a syllogism of any length. The program will tell you whether it is a valid syllogism, and if not, why not. It will also analyse the links between terms in the syllogism. BASIC code, and a version compiled for the Mac.
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 The Syllogistic Machine  Johan Mårtensson
A JavaScript machine for checking the properties of Aristotelian syllogisms, with links to Mårtensson's OnLine Logic Book.
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 Symbolab  EqsQuest
This semantic search engine for math and science considers the contextual meaning of equations and expressions. Query a mix of text and symbols with Symbolab's pad, which toggles among Greek letters, operators, differentials, and "accents" (vectors, hats,
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 Symbol, Form and Number in Ancient Egypt  Franz Gnaedinger
A book on early mathematics in Egypt, with some social and religious background. Includes a discussion of the use of Pythagorean triples in Egyptian architecture, and hypotheses on the calculation with unit fractions and the approximation of the area
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 Symbolic Computation Group (SCG)  Dept. of Computer Science, University of Waterloo, Ontario, Canada
SCG has as its primary goal the research and development of algorithms for computer algebra, including both symbolic computation and hybrid symbolicnumeric computation. The algorithms developed are incorporated into the Maple computer algebra system.
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 SymbolicNet: Symbolic Mathematical Computation Information Center  ICM; Kent State University
The area of Symbolic and Algebraic Computation (SAC), also known as Computer Algebra (CA), aims to automate mathematical computations of all sorts. SAC research usually combines mathematics with advanced computing techniques. This site includes: introductory
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 SymmeToy  Hank Hufnagel
A Windows program for creating paint patterns, symmetry roses, tessellated art, and symmetrically decorated 3D polyhedron models. The program is easy to learn, fun to use and includes extensive online help. Appropriate for all ages, but especially for
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 Symmetrica  Lehrstuhl Mathematik II, University of Bayreuth
A collection of routines, written in the programming language C, for doing computations in the representation theory of classical and symmetric groups, and related areas. With a list of papers that mention Symmetrica, and a collection of online programs
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 Symmetric Presentations  J. N. Bray
Presentations of groups, symmetric or otherwise, divided into classes to make location easier. Groups that have just one (finite) nonabelian composition factor up to isomorphism are listed in the first seven sections according to the isomorphism type
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 Symmetry and Group Theory (The Geometry Junkyard)  David Eppstein, Theory Group, ICS, UC Irvine
Computational and recreational geometry pointers to sites with information, problems, and lessons having to do with symmetry and group theory (tessellations, kaleidoscopes, origami, etc.).
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 Symmetry  Gyorgy Darvas
Organizations, events, publications, projects related to symmetry.
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 Symmetry Studio 1.01  Binkley, Simon; Artware, Inc.
Symmetry software for mathematics and art, for the Macintosh. A computeraided design tool that allows you to quickly create complex twodimensional symmetrical patterns. It simplifies the study and use of mathematical principles that underlie the regular
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 Symposium on Implementing Reform in Math, Engineering, and the Sciences
A workshop that brought together college faculty and administrators involved in largescale implementation projects on the freshmen and sophomore level, or who were preparing such projects for the near future, held June 78, 1996, in Scottsdale, Arizona.
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 SysQuake  Calerga
Highly interactive software for the design and simulation of dynamic systems. Runs on PowerPC Macintosh computers and Windows 95, 98 and NT 4 computers. SysQuake LE is the free version of SysQuake, and may be downloaded from the site.
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 SysteMATHics  Sigurd Andersen
Based on a discipline started by John G. Bennett, systematics is an attempt to understand the meaning implicit in number. The three areas of mathematical exploration covered are triadic numbers; ngrams, number patterns expressed graphically using the
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 System Simulation: The Shortest Route to Applications  Prof. Hossein Arsham; University of Baltimore
Course notes. Information includes: Course Information (for students enrolled in the class); Topics in Descriptive Simulation Modeling; Statistics and Probability for Simulation; SIMSCRIPT, and SPSS Commands; Techniques for Sensitivity Estimation; Goalseeking
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 Systems Theory; Control  Dave Rusin; The Mathematical Atlas
A short article designed to provide an introduction to systems theory; control: the mathematical study of complex dynamic structures in engineering. One
can attempt a mathematical or statistical test for system identification, that is, to deduce the
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 T^{3} Conferences  Texas Instruments, Inc.
The Tł program hosts the annual Tł International Conference each spring and twoday Regional Conferences throughout the year. Tł Virtual Conferences contain video recorded sessions from Tł events. Tł conferences are appropriate for Kcollege, mathematics
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 Tables of Roman Measurement  Mike Neill
Tables of Roman measurement on this site (Calender, Capacity, Length, Money, Surface, Weight) are taken from A Smaller LatinEnglish Dictionary, by William Smith LLD, a Classical Examiner in the University of London, John Murray, Albemarle Street, 1865.
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 Take a Little Piece of PI with You Wherever You Go  Adam Zampino
Proudly display PI to 1000 decimal places in an attractive design, in various types of apparel and housewares (mugs, clocks, etc.). PI has fascinated people for centuries, and now you can have your own piece of PI to enjoy. This makes a great gift for
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 Taking Games Seriously  Cut the Knot!, Alexander Bogomolny
In the twenty years since it first appeared, Winning Ways for Your Mathematical Plays had become a classic and a rarity. So did its companion book, On Numbers And Games, which was written in just about a week by one of the WW's authors and saw the light
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 Talking about Probability: A Study on Learning Probability Theory via a Dialogue System  Dr. Dietmar Janetzko
After an initial quiz, a "talking head" will present and discuss problems in probability theory. You don't
have to be an expert on probability theory to participate, though people with a background in that field may also enjoy asking questions of Dr.
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 Talk of the Nation, Science Friday  Ira Flatow, National Public Radio
An edited version of a radio program that aired on September 9, 1994. Science Friday host, Ira Flatow, interviewed guests Keith Devlin, Dean of Science at St. Mary's College, and William Dunham, math professor at Muhlenberg College.
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 Talk Stats Forums
A discussion forum for statistics enthusiasts. Get free statistics help or
just hang out and talk about statistics.
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 Tangencies of Circles and of Spheres: Radii Solutions  Eugene F. Dearing; Dearing Aviation
New methods of finding the radii of circles tangent to three given circles, (Apollonius' Problem), and the radii of spheres tangent to four given spheres, (Apollonius' Problem in three dimensions). Download the article in zipped format, or view it online.
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 Tangent Circles  Paul Kunkel
Three circles are given. How many circles can be constructed tangent to all three? How are they constructed? This lesson includes ten applets, to cover all of the special cases. Some of them are very complex.
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 Tangent Planes  Magness, Klotz, Swarthmore College
An experiment in using the World Wide Web to illustrate the intuitive notion of tangent plane to a graph of a function of two variables. Written by Prof. Gene Klotz and Swarthmore College student Ethan Magness.
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 TaniyamaShimura Conjecture Proved (Math Chat)  Frank Morgan, MAA Online
A proof of the full TaniyamaShimura conjecture, partly included in Wiles's 1994 proof of Fermat's Last Theorem, was announced last week [June, 1999] at a conference in Park City, Utah, by Christophe Breuil, Brian Conrad, Fred Diamond, and Richard Taylor,
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 TareasPlus
Videos de lecciones a frente de una pizarra digital, narrado en español. Variando en duración, los asuntos de matemática incluyen aritmética, álgebra, trigonometría, precálculo, cálculo diferencial,
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 The Tau Manifesto  Michael Hartl
"This manifesto is dedicated to one of the most important numbers in mathematics, perhaps the most important: the circle constant relating the circumference of a circle to its linear dimension... The traditional choice of circle constant is π  but,
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 Taxicab Angles and Trigonometry  Thompson, Dray
Taxicab geometry is essentially the study of an ideal city with all roads
running horizontal or vertical. The roads must be used to get from point A to point B; thus, the normal Euclidean distance function in the plane needs to be modified. Article abstract:
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 Taxicab Geometry/La Géométrie des Taxis  Pascal Tesson
A term project for a Pattern Recognition course given by Godfried Toussaint at McGill University. Other student projects from 1997, 1998 and from a Computational Geometry course are also available. Contents: What is Taxicab Geometry? Why Taxicab Geometry?
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 Taylor & Francis Mathematics Journals  Taylor & Francis Group
A list of the mathematics journals published by Taylor & Francis Ltd.
including links to the home page of each journal on the Taylor & Francis Web site. Journals listed: Applied Mathematical Finance; Linear and Multilinear Algebra; Applicable
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 TcP@d: TeleConferencing Pad  Vision Alpha Products
A small, erasable white board together with a PC camera called a TcP@d (Pat. Pend.), used in conjunction with freely available video conferencing software, to transmit "scribal information" in real time. Viewer(s) see equations, drawings, etc., written
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