 Advanced Technology Council in Mathematics (ATCM)  ATCM, Inc.
ACTM promotes and facilitates the use of technology for the learning and appreciation of mathematics, supports and enhances research and development in mathematics, and disseminates new and updates information of mathematics to the global community.
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 Advances in Applied Clifford Algebras  Jaime Keller, Ed.
A journal that publishes research papers and notes, expository and survey articles, book reviews, and reproduces abstracts, and also reports on conferences and workshops in the area of Clifford Algebras and their applications to other branches of mathematics
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 Adventitious Geometry  Tony Davie; School of Mathematical and Computational Sciences, Univ. of St Andrews, Scotland
A brief illustrated page about a seemingly simple problem involving an isosceles triangle with some angles given. Under what circumstances are all the angles in the diagram rational multiples of pi? Further discussion of adventitious quadrangles and concurrent
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 Adventures in Statistics: Cartoon Learning Modules  Ralph Vacca
Available on CDs and online, this 80minute interactive supplement utilizes humor, animations, and engaging storylines to maximize students' understanding while eliminating the "statistics anxiety" that often interferes with learning. Demo available online.
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 Adventures in the MathZone  Ivars Peterson (MathTrek)
Ivars Peterson and his wife, Nancy Henderson, have written "a book that introduces children to a variety of ideas also of interest to today's mathematicians: knots, map coloring, Möbius strips and topology, prime numbers, chaos, fractals, and more. Our
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 A. Einstein: Image and Impact  American Institute of Physics
All about Albert Einstein. Essays, photographs, and stories; hear Einstein explain his famous equation E=mc^2. Contents: Formative Years; The Great Works; E=mc2; World Fame; Public Concerns; Quantum and Cosmos; The Nuclear Age; Science and Philosophy;
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 Aepryus Software
Aepryus is a developer of math, physics, and evolutionary biology software for Microsoft Windows computers. Download, purchase, or obtain information about programs such as Aepryus Graph, a function plotting application capable of 2D and 3D shaded plots
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 AERA Special Interest Group: Research in Mathematics Education  Jeff Shih
Research in Mathematics Education is a Special Interest Group of the American Educational Research Association. The purpose of SIG/RME is to promote and to disseminate research, development, and evaluative efforts in mathematics education, and to promote
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 The Aerobie^{®} Flying Ring  Alan Adler
A scientific paper by the inventor of the Aerobie® flying ring: "The most difficult aspect of the design task is that the disc must fly over a wide range of α (angle of attack).... A conventional Frisbee disc partially accomplishes this by employing
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 Aesthetics of the Prime Sequence  Turpel Armand
A brief introduction to prime numbers, with a primality testing applet, a page on primes and music, primes and nucleotide bases, primes graphics, idiot savants and primes, primesrelated software, related links, favorite books, and a special page of Lyapunov
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 aeyoung.mathematician  Andrew E. Young
Papers from a Mathematics graduate from The University Of Sussex at Brighton: Number Theory: GCD and Prime Factorisation; Molien's Theorem, Invariant Theory and Gregor Kemper; A History of Equality.
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 The Af2 Proof Assistant  Christophe Raffalli et al., France
A type system based on second order intuitionistic logic. The major design goal of this program was to make as easy as possible the formalization of
mathematical proofs on machine.
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 Africa  Mathematics and the Liberal Arts  Todd Hammond
Notes on published articles: a resource for student research projects and for teachers interested in using the history of mathematics in their courses. Many pages focus on ethnomathematics and on the connections between mathematics and other disciplines.
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 African Mathematical Union (UMA)  Dr. Scott W. Williams
The African equivalent of the International Mathematical Union. An interim site with details of the Union's activities; the official webpage of the AMU will be operated from the Al Akhawayn University in Ifrane, Morocco (www.alakhawayn.ma).
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 Against All Odds Video Series: Timings  Gordon Smyth
Gordon Smyth has timed each and every segment of the Against All Odds videos. A great timesaver if you want to show only segments of a particular video. Videos on statistics and probability concepts.
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 AG Algebraic Geometry (Front for the Mathematics ArXiv)  Univ. of California, Davis
Algebraic Geometry preprints, from the U.C. Davis front end for the xxx.lanl.gov ePrint archive, a major site for mathematics preprints that has incorporated many formerly independent specialist archives. Search by keyword or browse by topic.
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 AgentSheets  AgentSheets, Inc.
A combination of enduser programmable agents, spreadsheets and Java authoring tools. The new version of AgentSheets lets endusers build a wide range of applications that include interactive simulations, games, and intelligent web agents. Projects created
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 Aide en maths collège lycée
In French: Forum d'aide en maths destiné principalement aux collégiens et lycéens. Possibilité d'utiliser des notations mathématiques dans les messages et d'importer des documents. Aide rapide.
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 Ainsworth Computer Seminar  Dick Ainsworth
Sample programs, flowcharts, and hypertext illustrating how software works. Select the desired level, from a quick overview of software to a detailed look at how these programs are developed. A special section for programmers and other curious people
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 The Air Force Collaboratory  U.S. Air Force
The Collaboratory poses military challenges for students to tackle with a community of peers — and alongside real Airmen. Experience science, technology, engineering and mathematics (STEM) in action with projects such as "Search and Rescue 2.0,"
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 AJ Design Software  Jimmy Raymond
Provides various math, science, and engineering calculators. Calculators include geometric shapes, constant acceleration motion, ideal gas law, pipe flow, Reynolds number, venturi meter, and quadratic equation.
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 The A. J. Pappanikou Center for Developmental Disabilities  University of Connecticut
A University Affiliated Program (UAP) sponsored by the Federal Administration on Developmental Disabilities through the U.S. Department of Health and Human Services. The Pappanikou Center UAP works with others to create opportunities that improve the
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 Akalu Tefera's Electronic Headquarters  Department of Mathematics and Statistics, Grand Valley State University
A mathematician whose research interests include computer algebra, automated theorem proving, and combinatorics and their "derivatives" or "equivalence classes." The site contains Maple packages for multiple integration of hyperexponential functions.
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 Akustische Täuschungen/Acoustic illusions  Stefan Scheller
Endlos ansteigende Melodien: Der ShepardEffekt. Endlessly rising melodies: The Shepard effect. (Illustration: M. C. Escher: Treppauf, treppab  ascending, descending.) Besides the wellknown optical illusions there are acoustic ones, too. Perhaps the
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 Alan Hensel's homepage  Alan Hensel
Instantaneously convert from decimals to fractions, as you type, with this JavaScript calculator. Hensel, a software developer, also offers a Java version of Conway's Game of Life, as well as interactive Twixt Quarterboard puzzles (Ajax) and a Twixt commentator
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 Alan H. Schoenfeld  Graduate School of Education, University of California, Berkeley
Download PDFs of publications on mathematics education and curricular considerations such as "Mathematics Teaching and Learning"; "The Math Wars"; "Learning to Think Mathematically: Problem Solving, Metacognition, and SenseMaking in Mathematics"; "Toward
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 The Alan Turing Home Page  Andrew Hodges
A gateway and guide to a large site dedicated to Alan Turing (19121954); 25 pages of biographical information on this computer scientist, mathematician, and cryptographer, from the author of Alan Turing: the Enigma.
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 Albert Einstein Online  S. Morgan Friedman
Information about Einstein, pictures, organizations that bear his name. Biographies, Hong Kong Baptist Univ. and MacTutor History of Mathematics Archive; Einstein's History; Obituary; Information, David Joyce; Einstein's interview with the FBI; Why Socialism?
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 AlChemie Software and Computer Aided  Jo Geuskens
Computer Aided Learning (CAL) for students and teachers, with animations, simulations, and programs for learning maths, physics, and chemistry. In Dutch.
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 Alexandre Borovik
Borovik teaches and researches group theory at the University of Manchester (UK), where he is a Professor of Pure Mathematics. See his eightpoint teaching manifesto, read about his methodology, and download slides of selected talks, which include "Hidden
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 Alexandru Suciu  Alexandru I. Suciu
Teaching resources such as quizzes, homework assignments, Mathematica solutions, qualifying exams, and syllabi for undergraduate courses in integral calculus, honors calculus, and linear algebra; and for graduate courses in geometry and topology. Also,
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 The Algae Programming Language  Scott Hunziker, Mike Brennan
A free (GNU GPL) highlevel interpreted language for numerical analysis.
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 Algebra, Abstract and Concrete  Frederick M. Goodman
An undergraduate textbook (Prentice Hall, 1998). The book is intended to be useful for a course in modern algebra for beginners or a slightly more advanced course, or an undergraduate course on geometric aspects of group theory or Galois theory. Interactive
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 Algebra and Calculus Sketches  Ruth Carver
See how the graph of y=mx+b changes as m or b changes; how the graph of y=ax^2+c changes as a or c changes; how the graph of y=a(xh)^2+k changes as a,h and k change; and examine five Geometer's Sketchpad sketches showing how to find equations of tangent
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 Algebra Coach  Eric Hiob
Freeware (but please register) for use on Windows 95 and higher. The Algebra Coach shows the user stepbystep how to solve any equation or simplify any expression that they enter. It also shows how to solve any system of linear equations by substitution
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 Algebraic Combinatorics Via Finite Group Actions  A. Betten, H. Fripertinger, A. Kerber
An Internet book with chapters on Actions: Actions of Groups; Bilateral classes, symmetry classes of mappings; Finite symmetric groups; Complete monomial groups; Enumeration of symmetry classes; The involution principle; and Special symmetry classes;
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 Algebraic Curves  Silvio Levy; The Geometry Center
Curves that can be given in implicit form as f(x,y)=0, where f is a polynomial, are called algebraic. This site provides an overview, with illustrations.
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 Algebraic Geometry 
Dave Rusin; The Mathematical Atlas
A short article designed to provide an introduction to algebraic geometry, which combines the algebraic with the geometric for the benefit of both. Thus the recent proof of "Fermat's Last Theorem"  ostensibly a statement in number theory  was proved
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 The Algebraic Geometry Notebooks  Aksel Sogstad
For nonexperts. Contents: What is algebraic geometry?; What can algebraic geometry be used for?; Classification of curves in the Weierstrass familiy; Bezout's Theorem; Varieties, orbits and orbitspaces; Automatic theorem proving using Singular.
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 Algebraic Geometry  Peter Stiller; Dept. of Mathematics & Computer Science, Texas A&M Univ.
This page answers the question, "What is Algebraic Geometry?"  a subject with historical roots in analytic geometry, concerned with the geometry of the solutions of a system of polynomial equations. With a link to a bibliography of related publications.
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 The Algebraic Method  R. H. Logan
An explanation of the algebraic method, involving an algebraic relation between two or more variables with one variable expressed as a function of one of the others. Includes Algebraic Manipulation (Transformation of Variables); Continuity Principle of
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 Algebraic Number Theory and Elliptic Curves  Ghitza, Osserman; Massachusetts Institute of Technology
A semesterlong seminar giving a rapid introduction to algebraic number theory and elliptic curves. Topics: Dedekind domains, rings of integers, schemetheoretic curves, finite morphisms thereof, splitting and ramification, the Tchebotarov density theorem
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 Algebraic Number Theory Archives  Boston, Grayson
Preprints about algebraic number theory and arithmetic geometry are accepted in electronic form for storage until publication. There are instructions for authors who wish to submit preprints to the archives and for for joining the mailing list (members
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 Algebraic Number Theory: Global Fields  Dave Rusin; The Mathematical Atlas
A short article designed to provide an introduction to algebraic number theory. Subcategories include rings of algebraic integers, quadratic extensions, Iwasawa theory, Galois theory, LanglandsWeil conjectures, density theorems, Adele rings and groups,
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 Algebraic Structures  Alex LópezOrtiz and the Sci.Math FAQ Team
Brief explanations of the following concepts: N is a monoid; Z is an integral domain; Q is a field; in the field R the order is complete; the field C is algebraically complete
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 Algebraic Systems  Christer Blomqvist
Definitions, descriptions, and the basics of Abstract Algebra: groups, rings, fields and the like.
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 Algebraic Topology  Dave Rusin; The Mathematical Atlas
A short article designed to provide an introduction to algebraic topology, the study of algebraic objects attached to topological spaces. The algebraic
invariants reflect some of the topological structure of the spaces. The use of these algebraic tools
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 Algebra in Simplest Terms  Annenberg Media
In this video series for college and high school classrooms and adult learners, host Sol Garfunkel explains how algebra is used for solving realworld problems. Free sign up is required for firsttime users of the online videos. Materials (videos and
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 Algebra Interactive!  Arjeh M. Cohen, Hans Cuypers, Hans Sterk
The first chapter of the HTMLbased book Algebra Interactive!, an introduction to abstract algebra providing an algorithmic approach to algebraic structures ranging from the elementary structures of the integers, polynomial rings in one variable, and
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 Algebra Lineal  Juan M. Olazabal
Material suplementario al curso reglado de la Facultad de Ciencias de la Universidad de Cantabria, España. Mira, en particular, el formulario para eliminación Gaussiana. In Spanish: an introduction to Linear Algebra: matrices, rank, echelonforms,
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