 CGAL  Computational Geometry Algorithms Library
The CGAL project is a collaborative effort to develop a robust, easy to use, and efficient C++ software library of geometric data structures and algorithms. Manual, supported platforms, download, patches, user support; also publications, extension packages,
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 Chain Rule Calculus Song  North Carolina School of Science and Mathematics (NCSSM)
Real Audio file of an original song, accompanied by piano, that teaches the chain rule, with example derivatives. Also listen to a tune about the product rule.
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 Chain Rule  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about the chain rule, such as when to use it and why.
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 Challenge by Choice  David Suarez and others
A classroom mathematics program that lets students choose their own level of challenge within the structure of the curriculum. His blog offers details of the program, the theoretical and practical basis of differentiated instruction, and the results he's
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 The Challenge of Detracking: Finding the Balance between Excellence and Equity  Lockwood, Cleveland; UEWeb
Download this PDF for an introduction to and background of tracking; terminology, issues, and data showing prevalence and impact; and bibliography.
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 Challenger Center for Space Science Education
A notforprofit organization committed to promoting science literacy. Partnering with museums, science centers, schools, universities, and communities across North America, Challenger Center uses the theme of space exploration to create positive learning
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 Challenges: Mathematics and Statistics  InnoCentive, Inc.
"Seekers" submit challenges to InnoCentive's online marketplace for innovation, where scientists, engineers, professionals and entrepreneurs collaborate to solve them. The most innovative solutions receive financial awards ranging up to US$1,000,000.
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 Challenges  RSA Security
Read about three cryptographic challenges: RSA Factoring Challenge, SecretKey Challenge, and DES Challenge III. For the solution of these cryptographic challenges, RSA offers cash prizes as "... modest rewards for some of the hard work that goes into
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 Chalmers Finite Element Center  Chalmers University of Technology, Göteborg, Sweden
An interdisciplinary unit at Chalmers University of Technology in the field of computational mathematical modeling and scientificindustrial computing. It is formed by groups in the Departments of Electromagnetics, Mathematics, Solid Mechanics, and Structural
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 Chameleon Graphing: Lines and Slope  Ursula Whitcher
A Web unit for middle school and early high school students, in which Joan the Chameleon introduces and explores lines and slope, to accompany a unit for elementary and middle school students on The Coordinate Plane. See also Whitcher's unit on Plane
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 Chameleon Graphing: Plane History  Ursula Whitcher
A Web unit for middle and high school students. Sam the Chameleon investigates the history of the coordinate plane. Was it invented? Who named it? The unit includes a glossary and brief biographical information about the historical figures involved. See
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 Chameleon Graphing: The Coordinate Plane  Ursula Whitcher
A Web unit that introduces the coordinate plane, for elementary and middle school students. With the help of Sam the Chameleon, learn to find points on a number line and graph points in the coordinate plane. See also Whitcher's companion units on Lines
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 Chance Encounters at ICME9  Cut the Knot!, Alexander Bogomolny
From the International International Congress on Mathematics Education held in Tokyo in August, 2000, impressions that came from personal, often unplanned, meetings with such mathematicians as N. P. Dolbilin (who outlined the history and the current state
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 CHANCE  J. Laurie Snell, Mathematics Dept., Dartmouth College
Materials designed to help teach a "Chance" course or a more standard introductory probability or statistics course. A Chance course is a case study quantitative literacy course designed to make students more informed and critical readers of current news
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 Chance Magazine  George P. H. Styan, Ed.; American Statistical Association & SpringerVerlag New York, Inc.
A magazine about statistics and its use in society. Information on recent issues and indexes; Available Data Sets, Articles, and Relevant Links; how to subscribe and submit articles.
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 Chance of Bank Balance $0.00 (Math Chat)  Frank Morgan, MAA Online
Answer to the Challenge: My colleague Dick De Veaux reports that upon returning from a threeweek trip, he found his checking account balance at exactly $0.00. Without further information, how would you estimate the probability of such an event?
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 Changes of Mathematical State [PDF document]  Ivars Peterson  Science News Online
A discussion of constraintsatisfaction problems, more specifically the logic puzzle in theoretical computer science known as the satisfiability (SAT) problem (e.g. working out a seating plan), the current state of research on computational "phase transitions,"
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 Change the Equation
This nonprofit, nonpartisan CEOled initiative aims to "solve America's innovation problem. It answers the call of President Obama's Educate to Innovate Campaign to move the U.S. to the top of the pack in science and math education," with science, technology,
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 Changing the Way We Teach Math  Kate Nonesuch
This document is a manual for teaching basic math to adults. It sets out some "best practices" from the literature, then outlines some difficulties instructors may face in implementing them, and makes suggestions for overcoming those difficulties. There
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 Channeling quantum information efficiently  Ivars Peterson  Science News Online
By carefully choosing how a message is encoded and decoded, it's possible to approach the theoretical maximum for transmitting information via photons or other quantum particles.
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 Chaos and Fractals  Joakim Linde; Chalmers Tekniska Högskola
A small fractal image gallery gallered with Fractus software, Fractint parameter files, a fractal icon archive, and links to other fractal sites.
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 Chaos and Fractals  ThinkQuest 1996
Chaos is an advanced field of mathematics that involves the study of dynamical systems or systems in motion. Chaos Theory consists of the mathematical proofs and theories that attempt to describe processes in motion. Think of any
mathematical system
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 Chaos and the Solar System  Paul Trow
An essay on the historical development of chaos theory, especially as it relates to the solar system.
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 Chaos at Maryland  The Chaos Group, the University of Maryland at College Park
Research in chaotic dynamics: the theory of dimensions, fractal basin boundaries, chaotic scattering, controlling chaos, and more. Read research papers, link to Daniel P. Lathrop's Nonlinear Dynamics Lab and the Pattern Formation Laboratory, learn about
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 Chaoscope  Nicolas Desprez
Software to render 3D strange attractors such as IFS, Julia, Lorenz, and pickover. Browse the gallery, participate in the monthly contest, check the freeware's manual, learn from tutorials. Also available at http://www.btinternet.com/~ndesprez/.
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 Chaos Demonstrations  Michael Cross
Two versions each of three Java applets  an "old, stable" version and a "new, trial" version for the Period Doubling Route to Chaos, the Lorenz Attractor and the Butterfly Effect, and Chua's Circuit. Created for an introductory course on Chaos at Caltech
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 Chaos Downloads (Chaos: The Software)  Gordon, Rucker, Walker; Autodesk, Inc.
A shareware release of James Gleick's CHAOS: the Software. Both the complete executable and the source code are provided. The program runs under Windows as a fullscreen DOS session. Six modules include the Mandelbrot set, Pendulum and Magnets, Strange
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 Chaos, Dynamic Systems, and Fractal Geometry  Tyeler Quentmeyer, ThinkQuest 1996
An educational Web page whose purpose is to make learning many of the complicated theories and ideas behind the theory of chaos, dynamic systems, and fractal geometry easier and more fun. It approaches problems from many different angles and gives users
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 The Chaos Experience  ThinkQuest 96
An explanation of the basic principles behind chaos theory, and a demonstration of its use in everyday life.
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 Chaos, Fractals, and Arcadia  Robert L. Devaney; Dept. of Mathematics, Boston University
An animated description of some of the mathematical ideas lurking in the background of Tom Stoppard's play Arcadia. Introduction; Thomasina's Geometry of Irregular Forms; The Chaos Game; The Sierpinski Hexagon; Thomasina's Fern; Valentine's Grouse; Summary
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 Chaos, Fractals and Attractors in Economics  Ben Tamari
Dynamical system in economics, fractals and chaos in nature.
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 The Chaos Game  Robert L. Devaney; Dept. of Mathematics, Boston University
One of the most interesting fractals arises from what Michael Barnsley has dubbed "The Chaos Game," which is played as follows. First pick three points at the vertices of a triangle. Color one of the vertices red, the second blue, and the third green.
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 Chaos Group  University of Maryland
Chaos is a multidisciplinary science. The members of the group are affiliated with diverse departments and institutions: Electrical Engineering; Mathematics; Physics; Physical Sciences and Technology; Institute for Plasma Research (IPR); Institute for
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 The Chaosgruppe  Sperl, Rast
A nonprofit scientific Association for direct support of current research projects and dialogue between faculties and interested amateurs about phenomena of nonlinear dynamics and pattern formation. The association produces a Who's Who Handbook of nonlinear
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 The Chaos Hypertextbook: Mathematics in the Age of the Computer  Glenn Elert
Formerly titled "Chaos, Fractals, Dimension": an illustrated paper submitted for the author's M.S. in secondary science education from Columbia. Contains chapters on: Mathematical Experiments (Iteration and Orbits, Orbit and Bifurcation Diagrams, Universality);
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 Chaos in the Classroom  Robert L. Devaney; Dept. of Mathematics, Boston University
One of the most interesting applications of technology in the mathematics classroom is the fact that it allows teachers to bring many new and exciting topics into the curriculum. In particular, technology lets teachers bring some topics of contemporary
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 Chaos: Making a New Science  James Gleick
An excerpt from the prologue of Gleick's book. "Where chaos begins, classical science stops. For as long as the world has had physicists inquiring into the laws of nature, it has suffered a special ignorance about disorder in the atmosphere, in the turbulent
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 Chaos (Mathematics Across the Curriculum)  Dartmouth College
Syllabus, related links, reading list, and student papers (access is restricted to the papers; you must have a password to view them) from a Dartmouth College course from winter, 1998. The course examined chaos from scientific, literary, historical and
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 The Chaos Metalink  Industrial Street Productions
A site designed as an ongoing resource for all those interested in Chaos science and things fractal. This site is sponsored by Images of Chaos, an Artwork for Television and Industrial Street Productions as a service to the Chaos community. Featured Sites;
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 Chaos Research Group (CRG)  University of Tennessee, Knoxville
The Chaos Research Group is an interdisciplinary team of faculty, students and engineering staff studying the nature of complex, nonlinear engineering systems to achieve a better understanding of the underlying physical processes, to develop better diagnostics,
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 Chaos Theory: complexity and chaos  Mindconnection
Books on chaos theory and links to relevant sites on the Web.
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 Chaos Under Control  David Peak, Michael Frame; Union College, Schenectady, NY
Material designed to support the text Chaos Under Control (W. H. Freeman, 1994): Macintosh software; course syllabi; six labs exploring natural fractals, iterated function systems, dimension computations, onedimensional dynamics, fractal analysis of
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 Chaos vs. Determinism  Harold Brochmann
Recursive vs. Newtonian Functions  two ways of calculating the value of an investment; The Real World  how do things work in reality? (planetary orbits); The Logistic Function  a study of population growth and extinction.
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 Chaotic Dynamical Systems (Serendip)  Victor J. Donnay; Bryn Mawr College
In dynamical systems, an object moves according to a rule. Depending on the rule motion, the object may move in a regular fashion or in a chaotic fashion. This project by Prof. Donnay, his students, and colleagues illustrates the ideas of chaos theory
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 Chaotic Mixing due to Separatrix Crossing  John R. Cary; University of Colorado
An applet that shows the chaotic mixing caused by separatrix crossing, an example of a deterministic dynamical system that has chaotic motion  motion that cannot be predicted for long times.
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 chaotic nspace network  Jon Camp and Benjamin Martin
Fractals: an introduction, gallery of images, and evaluation of software for fractal creation, with links to download. Other mathematics resources include a brief introduction to the Fibonacci sequence.
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 Characteristics of Gifted Children: Articles and Research  Carolyn K., Hoagies' Gifted Education Page
Articles and reports on characteristics of gifted children: perfectionism, sensitivity, social skills and emotional skills, underachievement, and visualspatial learning.
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 Charles Babbage Institute of Computer History (CBI)  University of Minnesota
CBI is a research center at the University of Minnesota dedicated to promoting the study and preservation of the history of information processing. As part of its mission, CBI maintains an archival collection available for use by the public that includes
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 Charlie's World  Buildcontent.Com
A searchable database of hundreds of links to educational content. Math resources include interactive movies, slide shows, Java applets and more. Topics include numbers, statistics, geometry, fractions and so on.
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 Charlotte and the World Wide Web  Santrach, Carpenter, Young, Young; The Geometry Center
An introduction to the World Wide Web, its potentials, and links to some geometry software (The Geometer's Sketchpad, Tesselmania, Geometric Golfer, Kali, Kaleidotile), for secondary school educators. A final project created for Math 5337, Technology
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