 Dynamical Systems on the Torus  Paul Trow
An illustrated essay introducing dynamical systems on the torus.
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 dynamicalsystems.org
An interactive laboratory on dynamical systems, in particular on particle systems. Software, Documents, and Links. Animated features include: Nonlinear chain; Forced Pendulum; Fermi system; Vlasov billiards; Vortex motion; 3 Body Problem; Convex Billiards;
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 Dynamic Geometry Sketches  Michael de Villiers
Interactive dynamic geometry sketches with JavaSketchpad, Cinderella & GeoGebra. Includes interactive sketches for Van Aubel's theorem, generalizations of the ninepoint circle and Euler line, FermatTorricelli point, and several Student Explorations
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 Dynamic Labyrinths  Inge Schwank, Institute for Cognitive Mathematics, Department of Mathematics and Computer Science, University of Osnabrueck
Labyrinth construction sets to download or play online with Flash plugin.
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 Dynamic Web Tools Using webMathematica  Steve Wilson and Mike Martin, Johnson County Community College, Kansas
Interactive Web pages that allow students and faculty to compute and visualize mathematical results directly from a Web browser. Primarily for undergraduate courses, the pages are grouped by categories and a given page may be listed under several categories
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 Dynamische Geometrie Systeme (DGS)  Dr. Dörte Haftendorn
In German. Characteristics and comparisons of dynamic geometry systems; Euklid: characteristics, material, notes, software, lessons; TI92 calculator Cabri Geomètre materials. You may send for a 40page booklet on "Dynamic Geometry of Systems"
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 Dyslexia  George Row
A compensium of links to other WWW pages and discussion groups on Dyslexia: basics, organizations, bibliographies, archives, software, research; also special needs education in general; and pointers to general disability information.
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 e = 2.7182818285...  Rick Fowler; University of Saskatchewan, Canada
History of and information about the number e, with links to sites on the Web and a hard copy reference.
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 EAGER (European Algebraic Geometry Research Training Network)  Wolfram Decker
The members of EAGER are algebraic geometers in mathematical centres spreading among most European countries. These centres are grouped into twelve geographical nodes which are responsible for the management of joint research projects and for the training
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 E and M  Finzer, Berkelman, Bennett; Key Curriculum Press
Two sketches showing how to model force fields. One sketch models a capacitor, and the other shows the strength at various points of the field generated by two charged particles.
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 Earliest Known Uses of Some of the Words of Mathematics  Jeff Miller, Gulf High School, New Port Richey, FL
An extensive list, with examples, sources, and contributors. These pages attempt to show the first uses of various words used in mathematics. Research is ongoing, and the uses cited should not be assumed to be the first uses that occurred unless it is
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 Earliest Uses of Various Mathematical Symbols  Jeff Miller, Gulf High School, New Port Richey, FL
An attempt to identify the individuals who introduced various common mathematical symbols, along with the dates and name of the document in which the symbol first appeared: symbols of operation; grouping symbols; symbols of relation; fractions and decimals;
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 Early Calculators  David G. Hicks
Some history on slide rules and their types and makers, as well as basic instructions on their use. Also Planimeters, Calculating Machines (adding machines, four function mechanical calculators, how calculating machiens worked), and Early Electronic Models.
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 Early Career Profiles: Recent bachelorslevel graduates in the mathematical sciences  American Mathematical Society
A collection of profiles of alumni from a variety US colleges and universities who majored in mathematics. Each profile includes statements of what the alumnus or alumna now does, the math each uses on the job, the recent graduate's educational background,
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 Earth/matriX: Science in Ancient Artwork & cience Today  Charles William Johnson GonzálezCasanova
Analyses of ancient reckoning, a summation of Fermat's Last Theorem through simple addition and lastdigit patterns, the AntiRadian, ancient Pi, an
alternative proof of the Pythagorean Theorem to the power of three, the
ancient mediatio/duplatio
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 Easier Fibonacci puzzles  Ron Knott
Puzzles that are simply related to the Fibonacci numbers....; Brick Wall patterns; Making a beeline with Fibonacci numbers; Chairs in a row; Stepping Stones; Fibonacci numbers for a change!; Telephone Trees ; Leonardo's Leaps; Fix or Flip; Two heads
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 EASI Street to Science, Engineering, and Math (SEM)
Equal access to software and information: an NSFsponsored project to collect and disseminate information on tools that make these fields more accessible to professionals with disabilities. Online workshops, Webcasts, links to programs for the visually
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 EasyFit: DistributionFitting Software  Mathwave Technologies
Automatically or manually fit probability distributions to data and select the best model in seconds. Key features include support for over 40 probability distributions, goodness of fit tests, and highquality interactive graphs. For Windows. Free trial
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 Easymaths  Echelon Systems Ltd.
A UK math site with GCSE tutorials, notes to be used as introductions to topics or for revision; an Exam Bank with examstyle questions and model answers for ages 1216; book reviews, a Practice Room with practice maths problems and tips for solving them;
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 EASYpEXPR: Writing Expressions in Pure HTML  Giovanni Artico
Enter an expression in the textbox, and the page will return the HTML code that would show the expression in standard visual form.
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 Easy Translator  Mapperz
Convert data from AutoCAD (DWG/DXF), CSV, GeoJSON, GML, GPX, DGN (v7), MapInfo (TAB), KML, or ESRI (Shapefile) into WGS84, WGS84 (GeoCentric), Mercator Projection, Robinson Projection, or Spherical Mercator.
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 Eat. Sleep. Math.
A Tumblr "repository for mathrelated links, anecdotes, code, and random thoughts" by a UCLA undergraduate. Posts, which date back to November, 2013, have included "Yesterday my friend and I passed Terence Tao in the MS building while I was explaining
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 eCalculus  D. P. Story, Mathematics & Computer Science, Univ. of Akron
A Calculus I tutorial written in TeX and converted to Adobe PDF. Features include verbose discussion of topics; typeset quality mathematics; inline examples and exercises; interactivity in the form of multiple choice questions and quizzes; and popup
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 ecalculus.org: The Calculus Page  Hass, Kouba, University of California, Davis, CA
Resources for calculus students: calculus problems with solutions; sample exams; excerpts from "How to Ace Calculus" (the Streetwise Guide); animations; tips on preparing for exams; mathematics and the job market (professions that use mathematics); and
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 ECC Tutorial  Certicom
Elliptic Curve Cryptosystem Classroom introduces elliptic curves and how they are used to create a secure and powerful cryptosystem: elliptic curve groups over real numbers, over Fp, over F2m, and the discrete log problem. Certicom's 109bit and other
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 EcEdWeb: Economic Education  Kim Sosin, Univ. of Nebraska at Omaha (UNO)
Teaching resources for economics teachers from K12 to college/university level, plus links to particularly useful sites for economics information and data for teachers and students. Two economics organizations, the National Association of Economic Educators
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 Economic and Game Theory  David K. Levine, Department of Economics, UCLA
A site that uses the tools of modern economic theory and game theory to explore how the interaction of intelligent goalseeking individuals determines social outcomes. The site offers general interest material, undergraduate and graduate course material,
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 Economic Research Service (ERS)  U.S. Department of Agriculture
This agency studies agriculture, food and nutrition, the environment, rural development, and international trade. Research reports, press releases, commodities reports, books, and other publications available online or for download in PDF format, with
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 Economics of Networks Internet Site  Nicholas Economides
A collection of information on economic issues of networks, such as the Internet, telephone and fax communications networks, railroads etc. One of the fundamental features of networks is that the value of a network service increases as the network expands,
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 EDeafMath  Dawn Kidd
Vlog for anyone who teaches "at least one deaf or hard of hearing student." Posts, which date back to February, 2013, include "Texas Math Sign Language Dictionary" and "50 Plus Ideas for Using Document Cameras in the Classroom." Kidd teaches middle school
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 EDGE: EmbeDded Graphing Engine  Hydrix
A graphing engine that can quickly and accurately graph a broad range of algebraic relations. Additionally it can identify and display regions where the relation is undefined. Demo version on the web.
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 Edinburgh Mathematical Society (EMS)  Chris Smyth, EMS Secretary; Edinburgh University
Founded in 1883 for "the mutual improvement of its members in the Mathematical Sciences, pure and applied"; the principal mathematical society for the university community in Scotland. Its membership is drawn from all the Scottish universities and other
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 EdNext
A utility that allows searches defined by grade level, subject, and specific topic. Select subject: mathematics to search for more than 8,000 math sites.
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 Ed Tech Tools  University of Hawaii
Free, webbased tools for educators, featuring QuizMaker 2.0, which allows users to create and correct online quizzes easily and quickly, without any knowledge of HTML. It provides instant feedback to students, and/or package answers in an email that
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 Educational Interests  Keith Lynn
See, in particular, Lynn's Math Modeling Project, which features Java applets to produce quadratic and sine examples; and Dynamics Project, on the Julia and Mandelbrot sets.
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 Educational Resources  Avraham Goldstein
CGI for solving quadratic and cubic equations, performing polynomial division with remainder, finding real and complex roots of cubic equations, and analyzing polynomial functions (determining first and second derivatives, local maxima, minima, inflection
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 Educational Technologies  TECFA, WWW Virtual Library
This site offers a selection of best pages dealing with educational technology; trees of concepts (guided search: educational software, artificial intelligence, constructivist design, virtual reality, distance education, etc.); the opportunity to make
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 The Educational Validity of Visual Geometry  Marius Blok; Hull, UK
A 1998 doctoral thesis describing the design of a new branch of geometry and its teaching, based on philosophy and visual art, avoiding the use of formulae and computations. The site provides a table of contents, preface, and summary, as well as contact
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 EducationDegree.com  Degree Prospects, LLC
A free, informational website for both current and aspiring teachers to find colleges and universities that confer certifications, master's, doctorates, and other education degrees. Browse the database by selecting a location, which includes online programs
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 Education Index  Frank Quinn, Department of Mathematics, Virginia Tech
Download Quinn's articles: "Contemporary Proofs for Mathematics Education," "A ScienceofLearning approach to Mathematics Education," "A Revolution in Mathematics? What really happened a century ago, and why it matters today," and "What should students
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 Education: Mathematics  The Mining Company
Web resource lists of sites: see sciences  physical/computer and, beneath, mathematics by Kristin Matherly, with links to sites "in the spotlight" and topics: Algebra; Applied Math; Books; Business Math; Careers; Calculus; Communities; Competitions;
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 Education Resources for Oceanography and Earth Sciences  JPL Physical Oceanography DAAC
A list of documents, data, and software for Education from NASA, UNESCO, the U.S. Geological Survey, the Jet Propulsion Laboratory (JPL), The National Center for Atmospheric Research (NCAR), National Space Science Data Center (NSSDC), etc.
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 education.ti.com  Texas Instruments, Inc.
Texas Instruments calculator resources and educational solutions: product information; free program downloads; classroom activities, including both a test prep section and a free, collaborative forum for sharing favorite activities that use TI technology,
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 Educator as a Midwife  Prof. Hossein Arsham; University of Baltimore
A collection of experiences gained in teaching and learning interactively online. A thoughtful exploration of the author's philosophy of teaching and learning, the advantages of distance learning, the goals of a formal education, and more.
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 Educator's Website  Software Express, Inc.
Commercial software catalog. Academic software discounts for students, faculty and schools, plus discounted software licensing. Over 10,000 items with special low prices for educators and students on software and licenses.
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 EDUMAT  Foro sobre educación matemática (mailing list)
Una lista de distribución dirigida a los profesionales de la
enseñanza de las matemáticas de todos los niveles educativos. Cualquier tema relacionado con la educación matemática tiene cabida en esta lista. La matemática
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 EDUSIG: Python in Education  Python Software Foundation
An informal venue for comparing notes and discussing future possibilities for the Python programming language in education. The special interest group's origins trace to Guido van Rossum's pioneering Computer Programming for Everybody (CP4E), a grant
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 EduWizardS
Math tutoring and homework help service. Review the educational background, experience, fees, and ratings of tutors, then book a session with voice chat, whiteboard, and textchat. Tutors adjust lesson pace "to a student's ability and guide them where
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 Edward Burger
Journal publications, Thinkwell textbooks, and other professional activities of the Francis Christopher Oakley Third Century Professor of Mathematics, formerly Baylor University's Robert Foster Cherry Professor for Great Teaching. Burger, who coauthored
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 Edward Frenkel's Home Page  Edward Frenkel
Papers and other professional activities by the author of Love and Math, Langlands Correspondence for Loop Groups, and Vertex Algebras and Algebraic Curves. See, in particular, this Berkeley math professor's calculus lectures on YouTube. Frenkel, whose
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