 Combinatorics Research Group  Pure Maths Department, The Open University
A group interested in graph theory, design theory, the history of combinatorics, and combinatorial computing. The Group runs the Open University Winter Combinatorics Meeting near the end of January each year.
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 Combinatorists of New England
A series of oneday conferences mostly held at Smith College in Northampton, MA. The Combinatorists of New England meet five times a year. This Web site provides information about future meetings and links to participants' papers available electronically.
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 Combined Membership List  AMS, SIAM, MAA, AMATYC
The searchable Combined Membership List (CML) includes the names and addresses of all persons who were members of the American Mathematical Society (AMS), Mathematical Association of America (MAA), Society for Industrial and Applied Mathematics (SIAM),
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 Combining Science and Mathematics in the Classroom Using Spreadsheets  Dawn M. Laning
A lesson plan involving the use of spreadsheets to investigate data analysis techniques with a set of data gathered in a chemistry experiment. Writeup from a class in mathematics education given by J. Wilson at the University of Georgia, fall 1997.
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 Combustion Chaos  Univ. of Houston, Univ. of Texas at San Antonio
An interdisciplinary research group studying the dynamics of pattern formation in burner stabilized premixed flames. Includes graphics, movies, and Java simulations of different patterns, explanations of models and experiments, and list of related publications;
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 Comedy Tonight, Math Style!  Ivars Peterson (MathLand)
Edward Burger and Colin Adams aren't yet as well known as such famous comedy teams as Laurel and Hardy... but they are not only performers but also math professors at Williams College in Williamstown, Mass. They bring antic energy, slapstick humor, and
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 Comments on Mathematics and Education  E. Lee Lady, University of Hawaii
Notes on the teaching and learning of math. What Is Mathematics? What Makes Mathematics So Hard? My Attitude Towards Teaching. Universities and Learning. Also email comments from readers, on: Teaching Maths in the public schools; Giving Students Power
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 A Common Book of Pi  Neal Carothers
A brief history of extended precision approximations of pi, including Archimedes' method for estimating pi, a proof that pi is irrational, a page full of formulas used to estimate pi over the centuries, and a brief look at a modern algorithm used to compute
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 Common Core Math  New Jersey Center for Teaching & Learning
Freely downloadable teacherdesigned units consisting of one to two hundred Interactive White Board (IWB) presentation slides: each of grades K8, PreAlgebra (available in Spanish), Algebra I (available in Spanish) and II, Geometry, PreCalculus, AP
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 Common Core Online  Darren Burris
Articles on Common Core State Standards (CCSS) mathematics, dating back to December, 2011, as "scooped," or digitally curated, by a Boston, MA, teacher.
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 Common Core Ratios and Proportions Wiki for Sixth Grade  Mary Dooms
Instructional videos, manipulatives, samples of levels of mastery, and other resources on ratios and proportions. See also Dooms' Common Core State Standards (CCSS) wiki for sixth grade geometry.
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 Common Core State Standards Initiative  Common Core State Standards Initiative
The Common Core State Standards aim to provide a consistent, clear understanding of what students are expected to learn, so teachers and parents know what they need to do to help them. The standards are designed to be robust and relevant to the real world,
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 Common Lisp the Language, 2nd Edition  Tom Bylander
Links for most Common Lisp functions (and other entities) to the portion of the online Common Lisp manual where they are defined. Since the index was automatically generated from the online manual, some functions may not be included in this index. Also,
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 Common Mistakes in College Mathematics  Eric Schechter
Pointers for students about mistakes in general mathematics and calculus. Errors include: everything is additive, loss of invisible parentheses, incorrect writing of fractions, derivative of x to the x, unbalanced differentials, and naive answers for
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 CommonSense Questions (Learning and Mathematics)  G. Polya; Math Forum
In his 1957 book, How to solve it, Polya describes a fourstage approach to mathematical problemsolving. He bases his approach on commonsense questions that would naturally occur to an experienced problemsolver. Polya claims teachers should pose these
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 CommonsMath: The Jakarta Mathematics Library  Phil Steitz, The Apache Software Foundation
Commons Math is an open source Java library of lightweight, selfcontained
mathematics and statistics components. Download releases; post to the wiki; read the users guide and project documentation.
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 Communicating Mathematical Expressions on the WWW  Ping
A semantic expression notation known as MINSE (a MediumIndependent Notation for Structured Expressions) with a deployed implementation that makes expressions a reality for the scientific and mathematical Internet community. The aim is to help the scientific
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 Communicating Mathematics with Hypertext  The Geometry Center
An archive of resources, including lecture notes, sample pages and programs, and links to software useful for scientific Web site design and management. The archive is based on the materials developed for a a short course by the same name sponsored by
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 Communication and Collaboration  The Partnership for 21st Century Skills
This page details the communication and collaboration skills framework from P21, and links to additional resources: Web Index for Communication Resources (an online index of many communication related topics and resources), Engauge overview of communication
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 Communication and Information, including Encryption  Dave Rusin; The Mathematical Atlas
See the Report of the Working Group on Cryptology and Coding Theory National
Science Foundation, April 1718, 1997. History; applications and related fields and subfields; textbooks, reference works, and tutorials; software and tables; other web sites
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 Community Colleges Home Page  Maricopa Center for Learning and Instruction
Community colleges are twoyear postsecondary educational institutions that offer certificate programs and Associate of Arts (A.A.) degrees. This site contains a searchable index to the web sites for more than 800 community colleges in the United States,
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 Community for Undergraduate Learning in the Mathematical Sciences  The University of Auckland
This crossfaculty community within The University of Auckland (NZ) brings together all the mathematical science providers at the university to create a researchbased Centre for tertiary education in the mathematical sciences. See, in particular, the
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 The Community of Ordinary Differential Equations Educators  Yong, Darryl; and Borrelli, Robert, Principal Investigators
The Community of Ordinary Differential Equations Educators (CODEE) seeks to improve the teaching and learning of ordinary differential equations (ODEs) through modeling, computer experiments, and other active learning projects. Freely download expository
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 Community of Science, Inc. (COS)  Alfred R. Berkeley, Chairman
A collaborative network of scientists and their institutions. Its goal is to accelerate science and promote the visibility and funding of scientific research. COS has been publishing on the Web since February 1994 and currently works with 200,000 scientists,
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 Commutative, Associative And Distributive Properties (SMILE)  James E. Breashears, Robeson High School
A lesson designed to teach students to compute expressions like (56 + a) + 4 and (50 * 7) * 2; to identify the commutative and associative properties; and to rewrite expressions by using the distributive property. From the Algebra and Trigonometry section
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 Commutative Rings and Algebras  Dave Rusin; The Mathematical Atlas
A short article designed to provide an introduction to ring theory. Commutative rings are sets like the set of integers, allowing addition and (commutative)
multiplication. Of particular interest are several classes of rings of interest in number theory,
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 Commutative Semigroups (Catalogue of Algebraic Systems)  John Pedersen, W. Edwin Clark; Dept. of Mathematics, University of South Florida
Definition and examples of commutative semigroups. A link to general information about semigroups.
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 Comparative Chronology of Money  Glyn and Roy Davies
This site chronicles monetary history from ancient times to the present day. The information presented is based on the book, "A History of Money." The timeline starts from 9000 BC and goes through 2002 AD.
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 Compare It!  Anne Moncure Elementary, Stafford, VA
Interactive quizzes designed to teach elementary school children about boolean operators greater than, less than, equal, and others using numbers, words, and objects.
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 Comparing Fractions  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about comparing fractions, putting them in order, and defining equivalent fractions.
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 COMPASS: Curricular Options in Mathematics Programs for All Secondary Students  Linda A. Roach
COMPASS provides information and assistance with the implementation of five comprehensive curriculum projects that support the Standards set forth by the National Council of Teachers of Mathematics (NCTM): Application Reform in Secondary Education (ARISE);
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 A Compendium of Common Probability Distributions  Michael P. McLaughlin
An online (PDF) encyclopedia listing probability distributions and their properties.
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 A compendium of NP optimization problems  Crescenzi & Kann
A continuously updated catalog of approximability results for NP optimization problems. Because no NPcomplete problem can be solved in polynomial time (unless P=NP), many approximability results (both positive and negative) of NPhard optimization problems
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 CompGeom  mailing list  Sariel HarPeled
A Web archive of discussions on computational geometry mailing lists.
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 Compgeom Mailing Lists  Ken Clarkson
Mailing lists for announcements, and discussions, for those working or interested in computational geometry. The listserver for compgeom is provided using netlib, which is an electronic library at research.belllabs.com that includes software, bibliographies,
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 Compleat Sine Wave, Fourier Series  Bill Finzer, Key Curriculum Press
Two "FPU Necessary [Geometer's] Sketches," one that illustrates Fourier series and another that draws a sine wave and lets you change the phase, amplitude, and frequency dynamically.
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 Complete Analysis of the Binary GCD Algorithm  Brigitte Vallée, Université de Caen, France
Lecture notes (summary by Cyril Banderier). Introduction; A Ruelle Operator for a Tauberian Theorem; The Other Two Parameters; All Roads Lead to Rome; References. In English.
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 Completing Latin Squares  Ivars Peterson (MathTrek)
Using only the numbers 1, 2, 3, and 4, arrange four sets of these numbers into a fourbyfour array so that no column or row contains the same two numbers. The result is known as a Latin square... in Latin squares of order 4, each row (and each column)
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 Completing the Square  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about completing the square, with diagrams, geometry, and alternate methods.
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 Complex Analysis (Graphics Archive, Special Topics)  The Geometry Center
Research involving maps of one or more complex variables.
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 Complexification  Jared Tarbell
View interactive, open source Java applets of fractals and other mathematically significant graphics.
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 Complexity International  An Electronic Journal of Complex Systems Research
A refereed journal for scientific papers dealing with any area of complex systems research. The theme of the journal is the field of complex systems, the generation of complex behaviour from the interaction of multiple parallel processes. Relevant topics
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 The Complexity of Geometric Constructions  François Labelle
Efficient constructions with straightedge and collapsing compass (the geometric tools of Euclid). The question of what can and cannot be constructed with this model of computation is basically answered by Galois Theory. This document deals with the minimum
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 Complexity Online  University of New South Wales
A scientific information network about complex systems, structures and processes that involve nonlinearity. Topics in complexity include artificial life, cellular automata, chaos, evolutionary computation, fractals, genetic algorithms, neural networks
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 Complex Numbers and Trigonometry  Hillman, Alexanderson, Newton
A text that presents an innovative introduction to trigonometry through the use of complex numbers. It is based on a high school text now out of print, but is most useful as a supplement for early college students not quite ready for calculus because
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 Complex Numbers  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A series of articles on the algebraic structure of complex numbers and their application to solving various problems in algebra and geometry. Several of the discussed features, for example, real and complex products, are drawn from very recent literature
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 Complex Numbers (Manipula Math)  International Education Software (IES)
Java applets to investigate complex numbers, their reciprocals, powers, and other selected functions. (One function leads to a fractal.)
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 Complex Numbers & Trig  Alan Selby
Complex Numbers and the Distributive Law for Complex Numbers, offering a short way to reach and explain trigonometry, the Pythagorean theorem, trig formulas for dot and crossproducts, the cosine law, and a converse to the Pythagorean theorem. A geometric
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 Complex number to a complex power may be real  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A proof using Euler's formula.
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 Complex, Technology Based Problems in Calculus  Math Department, RoseHulman Institute of Technology
Nearly 100 problems with a higher level of complexity than traditional textbook problems and that foster use of a computer algebra system. Problem categories include: antidifferentiation, data fitting, difference equations, differential equations, and
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