 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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 Steve's Math Site
"Mathematic memorabilia" by a Phoenix, Arizona high school student: binary numbers, factorials, calculations of 2^x from x=1 to x=200+, hand calculations of pi, logarithms and one radian, 3^x from x=1 to x=100+, and more.
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 Steve's Words  Steve Lee
Mathematicsrelated articles by a student at UCLA include brief reviews of books on chaos theory and an article on the connection between game theory and nuclear strategy.
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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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 Stickets  Wanderlands
A puzzle game for iPhone "that forgot Tetris existed": drag tricolored Lshaped blocks onto a grid and tap contiguous, similarly colored areas comprised of three or more squares in an ongoing quest to preserve space on the grid. The app also challenges
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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 Differential Equation Software  Yin Mei Wong
Commercial software for numerical solution of stochastic differential equations, for Windows, Linux, and Unix machines.
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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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 The Stock Market Game (SMG2000)  Securities Industry Foundation for Economic Education (SIFEE)
The Stock Market Game (SMG2000) is an electronic simulation of Wall Street
trading, designed to help students and adults understand the stock market, the
costs and benefits involved in decisionmaking, the sources and uses of capital
and other related
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 The Stock Market Game  woodydrn
Create a company, hire its staff, build its board, and see how it does in the marketplace. If you can convert your companies to a business park, you may win the game.
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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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 StocksQuest (Thinkquest 1998)  Connie, David, Joseph
An educational, interactive site offering free global stock games, especially for educators and contest organizers. Integrated into a realistic 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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 Stone's Free Mac Programs  Ishihama Yoshiaki
Free Mac software and images illustrating dynamical systems: applets (see the 4D Rubiks Cube), fractal generators, etc. Topics include artificial life, AfterDark modules, cellular automata, chaos, fractals, graphics, hyperdimension, genetic programming,
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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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 The Storybook of Geometry  ThinkQuest 1996
Learn the basics of geometry and see how they relate to real world situations. Explore and read stories that help to uncover the mysteries of geometry. Story problems (with answers): The Great Space Ace; The Pharoah's Pyramid; The Ice Cream Cone; Filling
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 The Story of Mathematics  Luke Mastin
Summary of major mathematicians and developments of mathematical thought over the centuries, "from its roots in ancient Mespotamia, Egypt and Greece to the abstraction of the modern era.... without getting too technical or getting bogged down in too much
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 The Story of Pi  Project MATHEMATICS!, California Institute of Technology
A videotapeandworkbook module that explores a basic topic in high school mathematics in ways that cannot be done at the chalkboard or in a textbook. Although pi is the ratio of circumference to diameter of a circle, it appears in many formulas that
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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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 Strategies for Finding Sequences  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about strategies for finding sequences, such as "Write an expression to find the nth term of the following sequence: 3, 9, 18, 30, 45..." and "Find the following 2 terms and a formula for the nth term."
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 Strategy Acquisition and Application (Learning and Mathematics)  Siegler, Jenkins; Math Forum
In this 1989 article, "Strategy Discovery and Strategy Generalization," Robert S. Siegler and Eric Jenkins of CarnegieMellon University discuss how children acquire and apply strategies, looking closely at a small group of students over a long period
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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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 Strawberry Macaw's Puzzle Page
Although simple, this collection of four logic puzzles provides a challenge for students of any age. The interactive puzzles are: The Fox, the Duck, and the Bag of Corn; The Three Gallon and Five Gallon Cans; The TwentyThree Matches Game; and The Game
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 Street Cents  CBC Halifax, Nova Scotia, Canada
A studentwritten site/TV program on consumer issues and, sometimes, math.
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 Stressed Out: Slope as Rate of Change  Cynthia Lanius
It's the night of the big game. You're in the locker room. The coach is pumping the team up. "Now, I know you people are nervous. That's okay, in fact, that's what we want. You're going to perform better on the court (stage) if you're a little nervous."
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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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 Stroh MathPage  Eric Stroh; Northern High School, Owings, MD
Algebra help for students: explanations, examples, practice problems, and hints for all topics covered in a high school Algebra I and Algebra II course. With pictures from Stroh's class and links to other relevant sites on the Web.
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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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