 Statpics.com  Robert W. Jernigan
This blog, "devoted to images that illustrate statistical ideas," has included posts such as "Quincunx: A Designer's View," "A Skewed Runway," "Joint and Marginal Distributions in Legos," "Microbes Illustrate Simpson's Paradox," "How Mariano Rivera Dominates
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 StatsLife  Royal Statistical Society
A professional body for all statisticians and data analysts that, since its foundation in 1834, promoting the importance of statistics and data. Publishers of Significance magazine, StatsLife freely offers resources for teachers, a glossary, and much
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 StatSoft Electronic Textbook  StatSoft, Inc.
"The Encyclopedia Britannica for nonmathematical statistics users." This searchable virtual textbook includes hundreds of illustrations and offers quick, easy and free unlimited access to training in the understanding and application of statistics. It
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 Stat Trek
Free, online tutorial covers basic statistics, probability, distributions, sampling, estimation, and hypothesis testing. Includes online calculators, sample problems with solutions, and glossary of statistical terms.
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 STATUSA/Internet  U.S. Department of Commerce
Part of the Economics and Statistics Administration of the the U.S. Department of Commerce. An information service providing economic, business, social, and environmental program data produced by more than 50 Federal sources; hundreds of thousands of
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 Staying in Step  Ivars Peterson (MathTrek)
Christiaan Huygens noticed that the pendulums of the two suspended clocks, hanging side by side from a common support, were swinging together. When one pendulum swung to the left, the other went to the right. The pendulums remained precisely in opposite
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 Stealing Copernicus  Keith Devlin (Devlin's Angle)
The theft of a first edition copy of Nicolaus Copernicus's classic text De revolutionibus orbium coelestium ("On the revolution of the heavenly spheres") was the seventh such disappearance of this valuable work in recent years  a chain of thefts that
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 Stef's HTML Equation Generator  Stefan Waner
A utility that generates math symbols and equations for web pages. The Equation Generator also allows editing of the HTML output. No plugins necessary; no need to create gifs for entire equations. Download Mac or PC versions; or use an online Javascript
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 Steiner Loops (Catalogue of Algebraic Systems)  John Pedersen, W. Edwin Clark; Dept. of Mathematics, University of South Florida
Definition, examples, and references about Steiner and TS Loops, and links to related terms in the Catalogue.
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 Steiner Quasigroups (Catalogue of Algebraic Systems)  John Pedersen, W. Edwin Clark; Dept. of Mathematics, University of South Florida
Definition, examples, and references about Steiner Quasigroups. Links to related terms in the Catalogue.
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 The Steiner Tree Page  Joe Ganley
The Steiner tree problem is a minimum interconnection problem. The most basic
version is in a graph: given a weighted graph in which a subset of vertices are identified as terminals, find a minimumweight connected subgraph that includes all the terminals.
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 stella2java  Shodor Education Foundation, Inc.
Use Stella2java to make Java applets out of the modeling software package Systems Thinking Experimental Learning Laboratory with Animation (STELLA). Copy and paste your equations from Stella into a web form, answer a few questions, and download your applet.
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 STELLA  isee systems
A model building and simulation software package. Read about STELLAbased materials such as Lessons in Mathematics: A Dynamic Approach. Get help with STELLA training, seek live support building a model, see tutorials, purchase supporting books and videos,
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 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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