 Stella: Polyhedron Navigator  Robert Webb
"Small Stella" is a program for viewing polyhedra and printing their nets so you can build your own. It has over 150 builtin models, plus their duals. Models include Platonic solids, Archimedean, KeplerPoinsot, Johnson solids, "Near Misses," and Stewart
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 Stellated Icosahedra  Roman Maeder
An excerpt of an article published in Mathematica in Education. There are 59 stellations of the icosahedron; these pages contain various images of them, ordered by increasing circumradius, and some background information. The metric properties and graphics
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 STEM Transitions  Center for Occupational Research and Development (CORD)
STEM Transitions offers more than 60 integrated projects for use in math, science, and technical courses in the six STEMrelated clusters: health science; information technology; manufacturing; transportation; science, technology, engineering and mathematics;
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 Stephan Kaufmann
A site with information about Stephan Kaufmann's Mathematica books, notebooks and packages, including A Crash Course in Mathematica.
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 Stephen P. Booth
A researcher working in physics and parallel computing. Articles and source  code for random number generation (parallel generation and a generic Fortran90 interface), and the xmountains program, which uses fractals to generate computer images of landscape.
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 Stephen's Guide to Logical Fallacies  Stephen Downes
Lists all known logical fallacies, with definitions, examples, and the steps needed to prove that the fallacy is committed. Site also includes links to logic references and resources.
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 Stephen Wolfram
The creator of Mathematica and one of the first researchers into cellular automata. Site includes a biographical sketch, photos, and a timeline of Wolfram's life; interviews with him; and the full text of many of his books, articles, talks, and patents.
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 Stereographic Projection (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
Let G be a sphere in Euclidean three space. We want to obtain a picture of the sphere on a flat piece of paper or a plane. Whenever one projects a higher dimensional object onto a lower dimensional object, some type of distortion must occur. There are
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 Steve Fulling's Home Page  Stephen A. Fulling
Courses in Foundation Coalition Freshman Calculus, linearity, and other subjects offer objectives, assignments, solutions and reports, exams, and supporting documentation such as books (.pdf, .ps, and .dvi formats). The site also includes access to the
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 Steve Mayer's Web Pages  Steve Mayer
Intended for Mayer's students at Bournemouth & Poole College: syllabi, student web pages, assignments, homework, module notes, review material for the A Level Pure Mathematics curriculum, and more, including resources for the Norwegian students he
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 Steven M. Christensen and Associates, Inc.  Steven M. Christensen and Associates, Inc.
Offers scientific computing consulting and program development for corporations and universities. Also distributes Schur, a group theory software for handling calculations with Lie and symmetric groups; and Sunfreeware.com, the Solaris Freeware Project.
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 Steven Strogatz
Research, teaching, publications and more by Strogatz, Jacob Gould Schurman Professor of Applied Mathematics at Cornell University. Best known in the academia for his 1998 Nature paper on "smallworld" networks, which he coauthored with his former student
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 Steven Strogatz  The New York Times Company
Mathematics from an adult perspective  from the basics of math to the baffling  by Steven Strogatz, a professor of applied mathematics at Cornell University. This New York Times series is not meant to be remedial, but rather to give readers a better
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 Steve's Math Resources  Steve Mills; LewisClark State College
Course notes, worked problems, and practice exams for courses offered by Steve Mills in differential equations, basic calculus, probability and statistics, and college algebra.
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 STFMath  Slavko Ilic
STFMath (was SunCalculator) is a multipurpose math utility: draw, analyze and evaluate Cartesian, Parametric and Polar functions, manage matrixes, complex
numbers, geometry and more.
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 Still Soft.com  Molchanov Denis & Belluyan Minas, Still Soft.com
Graphing calculator software for Windows, designed to be easy to use. Find asymptotes of functions, break points and extremums, calculate limits, define integrals, find derivative of functions and more.
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 STIMATH  Software Techniques Inc.
An expression evaluation tool that generates plots from any programming environment  even a command line.
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 The STIMULUS Project  Department of Applied Mathematics and Theoretical Physics, University of Cambridge
STIMULUS gives Cambridge University students the opportunity to assist experienced teachers in local schools, where they help weekly in mathematics, science, computing, information technology, design technology, and personal, social & health education
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 The Stirling EngineRefrigerator: Rich Pedagogy from Applied Physics  Randall D. Peters
An article detailing experiments with a Stirling engine. Abstract: A Stirling engine of the type used for demonstration purposes has been outfitted with a pair of sensors that measure pressure and piston displacement when the engine is operating with
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 Stochastic Analysis Digest  Carmona & Durrett, Moderators; Princeton University
Stochastic Analysis Digest provides conference information and publication
announcements in the areas of probability, stochastic analysis, statistics and
related fields. It has a section on open positions and is considering adding an
open discussion
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 Stochastic Analysis  Vincent Delloume
Links to sites related to financial mathematics: Introduction to stochastic analysis applied to finance, option pricing and risk management.
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 Stochastic Calculus Notes  Alan Bain
A complete elementary introduction to stochastic integration with respect to continuous semimartingales. Download in postscript, DVI, or PDF format.
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 Stochastic Lab  Denis Kozyr
Shareware and freeware math tools include the Smart Monte Carlo Excel addin, the thirteen functions of which generate random numbers with a certain distribution using the Monte Carlo method; Archim, which graphs functions based on explicit parametric
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 Stochastic Programming FTP Archive  Cambridge University
The Judge Institute: Research: Working papers and resources: Finance: FTP Archive. A set of WATSON pension fund management test problems, with random coefficients generated according to two different procedures  independent scenario generation and conditional
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 StockGarden  Robert Russell
Stocks and investing. Valuations and rankings of the best companies listed on the NASDAQ and NYSE.
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 Stock Options  The Animated Tutorial  Jerry Marlow
A fast and easy way to teach and to learn about stock options, option prices, stockmarket volatility, and BlackScholes options pricing theory. CD and Book $39.95. The theory provides a sophisticated way of analyzing and understanding the relations among
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 StocksQuest
An educational and interactive site offering free global stock games, especially for educators and contest organizers. Integrated into this global stock market simulation are lesson plans, stock guides, and online investing resources.
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 StockTrak  StockTrak
StockTrak is a virtual stock exchange simulator and fantasy stock market game. It allows its users to practice online stock trading within all of the major securities. Browse the site for information on stock investing research and fantasy stock market
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 The Stony Brook Algorithm Repository  Steven S. Skiena; Dept. of Computer Science, SUNYStony Brook
A comprehensive collection of algorithm implementations for over seventy of the most fundamental problems in combinatorial algorithms. The problem taxonomy, implementations, and supporting material are drawn from Skiena's book The Algorithm Design Manual.
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 StopandGo Science  P. Weiss  Science News Online
Viewing traffic flow as a complex system, controllers use mathematical and computer models and simulations in an attempt to decrease congestion. Some computerbased traffic models simulate virtual vehicles that motor by the hundreds or thousands through
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 Storeys Spreadsheet  Dan Pedersen, Henrik Kjaer; Profunda
A 3D spreadsheet for Macintosh that gives you new opportunities when working in the third dimension, created by placing a block of threedimensional cells on top of a spreadsheet, making for a new interaction between the 2D and 3D areas. Copy data from
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 St. Petersburg Mathematical Society
Lectures by leading mathematicians are held at Society meetings on a regular
basis (over a dozen such meetings take placeeach year). Topics of these lectures include the most important recent results in various fields of mathematics, major mathematical
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 StradivariSecrets.com  Dmitry Badiarov
Violin drawing tutorial and software based on application of early acoustics to violin making.
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 Strange Attractors  Peter Jansen
Physical models of strange attractors, made through rapid prototyping processes.
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 The Strange Case of Emily X  Keith Devlin (Devlin's Angle)
The story of Emily, a mathematical genius in high school who disappeared for 5 years and returned with even greater mathematical ability, and then wrote an autobiography, My Lost Years. An excerpt from Devlin's book, The Math Gene: How Mathematical Thinking
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 Strange Orbits  Ivars Peterson (MathTrek)
Newton's laws provide a precise answer to the problem of determining the motion of two bodies under the influence of gravity. If the solar system consisted of the sun and a single planet, for example, the planet would follow an elliptical orbit. When
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 A Stranger from Spaceland  Ivars Peterson (MathTrek)
An essay about Flatland, Edwin A. Abbott's 1884 "doorway to the fourth dimension and beyond for many explorers of geometry," and "a sharply delineated satire that reflects widely debated social issues in Victorian Britain," particularly women's rights.
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 Strategic Directions in Computational Geometry  Roberto Tamassia, et al.
A 1996 ACM/NSF Working Group Report chaired by Roberto Tamassia, intended to complement the Application Challenges to Computational Geometry. The report outlines the evolution of computational geometry, discusses strategic research directions with emphasis
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 Strategic Directions in Computer Science Education  Allen B. Tucker, Bowdoin College, Editor
From ACM Computing Surveys, 1996. Abstract: This report identifies major issues and challenges in computer science education across a wide range of institutions. It includes suggestions for improving the quality and effectiveness of computer science and
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 StrategicManagementScience.COM  Strategic Management Science, Inc.
Consulting services to help management use management science and operations research to create a sustainable competitive advantage. Publishes the Strategic MS/OR News, a monthly enewsletter that reports on developments in the strategic use of MS/OR.
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 Strategy and Conflict: An Introductory Sketch of Game Theory  Roger A. McCain
Game theory is an interdisciplinary approach to studying human behavior that touches on computer science, social sciences, and behavioral sciences. Designed as a supplement to existing texts as a means of making the basic ideas a bit more accessible,
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 Strings on Your Fingers  Michael P. Garofalo, Red Bluff, California
Links to a host of Web sites, including Web and print bibliographies, with suggestions for where to learn more about string figures and Internet links.
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 Structures Directory  Vaughan Pratt
An email directory of logicians, algebraists, and programming linguists working primarily on structural problems in mathematics and computer science.
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 Student Calculus Projects  David Arnold; Mathematics Dept., College of the Redwoods, CA
HTML or Scientific Notebook files. Topics: Equiangular Spiral; Semicubic Parabola; Nephroid; Astroid; Witch of Agnesi; Deltoid; Cassinian Oval; Equiangular Spiral; Quadratix; Ellipse; Conchoid of Nicomedes; Archimedes Spiral; Cardiod; Bernoulli's Lemniscate;
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 Student of Hyperspace  Eric Swab
A series of computer generated projections of analogs of the platonic solids in 4space; a projection of a regular polytope that exists only in 4space. Pages: Hypercube analog of the cube with sections and envelopes; Simplex analog of the tetrahedron
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 Student Projects in Differential Equations  David Arnold; Mathematics Dept., College of the Redwoods, CA
PDF or Scientific Notebook files. Topics: Romeo and Juliet; Modeling Molecular Vibrations; Van Meergeren Art Forgeries; The Flight of a Discus; A Simple Microeconomics Model; An RLC Circuit; Autocatalytic Modeling; A Rate of Memorization Model; Tacoma
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 Student Projects in Linear Algebra  David Arnold; Mathematics Dept., College of the Redwoods, CA
PDF or Scientific Notebook files. Topics: Fractal Music; Hill Ciphers; Forest Management  Sustainable Harvesting; The Singular Value Decomposition in Image Compression; Spotted Owl Population; Fourier Series; Arnold's Cat Map; Image Compression with
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 Students' difficulties with proof  Annie and John Selden; Mathematical Association of America
Keith Weber overviews research that addresses questions such as "What is proof and what is its role in mathematics?" and "How can the concept of proof be taught effectively?" Difficulties that students have with proofs include inadequate cognitive development,
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 Student's Difficulties with Proof  Keith Weber; Mathematical Association of America
"Proof is a notoriously difficult mathematical concept for students. Empirical studies have shown that many students emerge from prooforiented courses ... unable to construct anything beyond very trivial proofs. Furthermore, most university students
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 Student standouts tackle ills, theorems  P. Weiss  Science News Online
A project by a young mathematician who proved five theorems also garnered highest honors at the 1999 Intel International Science and Engineering Fair.
Jennifer Pelka, 16, of Orlando, Fla., received a $40,000 scholarship for her mathematics project, which
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