 CV Complex Variables (Front for the Mathematics ArXiv)  Univ. of California, Davis
Complex Variable 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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 CyberExam (S.O.S. Mathematics)  Dept. of Mathematical Sciences, Univ. of Texas at El Paso
A place for students and educators to check out sample tests, midterm exams, final exams, quizzes, projects, etc... in Mathematics. To submit an exam, please fax or email your material to S.O.S. MATHematics. (If you are a student,
please ask your instructor
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 Cybermath  Gustav Taxén, Ambjörn Naeve, Olle Sundblad, Pär Bäckström and Sören Lenman
An avatarbased collaborative virtual exploratory environment for math. Trial version for Windows is available free.
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 Cybernetics and Systems Theory  F. Heylighen; Principia Cybernetica Web
General background material on the field of Cybernetics and Systems Science (also: (General) Systems Theory or Systems Research), an academic domain that touches virtually all traditional disciplines, from mathematics, technology, and biology to philosophy
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 CyberStats  CyberGnostics, Inc.
A complete online introductory statistics course, including: a focus on data analysis and conceptual understanding rather than computation; over 600 interactive applets; real data in realworld settings; a builtin, simple, and free course management
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 Dadaviz  León Markovitz and Jishai Evers
Interactive data visualization curated from thirdparty sources. Infographics, which date back to April, 2014, have included "GDP per Continent & Country," "The major causes of death in the 20th Century," "4_21 Polytope Visualized," "The Changing Arctic,"
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 Dagra: Digitize Graphical Data  Blue Leaf Software
Software to digitize data from graphs for use in numerical calculations, modeling and analysis. For Windows platforms. Free trial, and moneyback guarantee, offered.
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 Daily Desmos  Anderson, Dan; Fenton, Michael; and Lanier, Justin
A daily challenge to reproduce a given graph using Desmos or some other graphing calculator. Teachers Anderson (NY), Fenton (CA), and Lanier (NY) rate the plots by difficulty. Also available from http://dailydesmos.blogspot.co.uk/.
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 Daina Taimina
Hyperbolic crochet, talks, publications, and other resources from the mathematician and fiber artist. See and read more about Taimina's fiber sculptures by visiting her artwork and blog. Books by this adjunct associate professor in the Department of Mathematics
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 DA Information  David Hoffman
An introductory course in decision analysis, with lecture notes and instructions for projects.
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 Dana Mackenzie
Author of The Universe in Zero Words and The Big Splat, or How Our Moon Came to Be, freelance mathematics and science writer Dana Mackenzie also contributes to the series What's Happening in the Mathematical Sciences published by the American Mathematical
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 The Dance of Chance Science Museum Exhibit  Center for Polymer Studies, Boston University
An online version of an exhibit focused on the emergence of patterns in Nature from physical and biological processes that appear to be chaotic. Exhibit kiosks, many of which are fractals, include Music of the Heart, Frozen Lightning, Erosion, Viscous
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 Dancing Chaos  Ivars Peterson (MathTrek)
Music, dance, and chaos... The image on the computer screen resembles a delicate, stylized butterfly with translucent wings held lazily askew. It's called the Lorenz attractor, named for meteorologist Edward N. Lorenz of MIT, who in 1963 discovered this
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 Dancing Statistics  British Psychological Society
Four short films demonstrating statistical concepts through dance. Each video clip intersperses clips of modern dance with observations and prompts that relate spacing, timing, and other aspects of the dancers' positions and movements to statistics concepts
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 Daniel J. Velleman  Daniel J. Velleman, Department of Mathematics and Computer Science, Amherst College
In addition to Velleman's selected papers, link to his books, software, and unpublished papers, including Proof Designer, a Java applet designed to help students learn to write proofs in elementary set theory by outlining the steps of proofs under the
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 DanielSoper.com  Soper
Statistics calculators from the California State University (Fullerton) professor of information systems and decision sciences: analysis of variance (ANOVA), beta distribution, beta function, binomial distribution, chisquare distribution, confidence
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 The Danish Mathematical Society
A society for the benefit of mathematics in research and education. Meetings, publications, and membership information. Site also available in Danish.
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 d'Arbeloff Interactive Math Project  Massachusetts Institute of Technology
Java applets, with help documentation, for exploration: Amplitude and Phase, Beats, Complex Exponential, Complex Roots, Convolution (accumulation or flip and drag), Damped Vibration, Damping Ratio, Euler's Method, Forced Damped Vibration, Fourier Coefficients,
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 Dartmouth College Wavelet Warriors  Math and Computer Science Depts., Dartmouth College, Hanover, NH
People, research interests, projects, selected publications.
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 Data Analysis Project: Honors Functions, Trigonometry, and Statistics  Harley, Hasskamp, O'Neil, Kent School
Projects by students of Nils Ahbel at the Kent School in Connecticut. Using UCSMP's "Functions, Trigonometry and Statistics" textbook, students learned how to do a statistical analysis and communicate the results, finding information and data on the Internet.
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 The Data and Story Library (DASL)
"Dazzle," an online searchable library of datafiles and stories that illustrate the use of basic statistics methods, providing data from a wide variety of topics so that statistics teachers can find realworld examples that will be interesting to their
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 The Data Archive  University of Essex, ESRC, JISC, UK
A United Kingdom collection of social sciences and humanities data and statistics. Search for articles and data sets and order the appropriate item, or link to sources of information online. The Data Archive Bulletin may be downloaded in Word format.
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 Database of Existing Mechanized Reasoning Systems  Kohlhase, Talcott.
A 1999 page designed to represent the state of an ongoing effort to collect information about existing automated reasoning systems  automatic resolution provers (like Otter), interactive provers (like PVS) and other mechanized reasoning tools. The page
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 Database of Number Correlations  James Barton
Partitionings, prime factorizations, polygonal numbers, and other data about each of the numbers one through one thousand, as well as connections to "various material and occult phenomena." See also Barton's magic square that has interesting prime factor
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 A Database of Sample Statistics Quiz Questions  Brian Schott, Ed.; Business Statistics, Georgia State University
In the 1970s the National Science Foundation developed a 3003page set of statistics quiz questions and answers. This site is a collection of 811 of those questions and answers, with links to the full database, arranged to complement the Introduction
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 Data Description, Inc.
Makers of data analysis software and computerbased training packages. The data analysis software is designed for data visualization, data mining, and statistical analysis; the computerbased training packages are selfpaced, multimedia training courses
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 Data Formats  Paul Bourke
Documentation on geometric data interchange formats: Postscript, HPGL, Images, Audio, Medical, and Computer formats (binary files, ANSI Standard, ASCII codes, Latin 1 character set, mmencode, VT100 commands and control sequences).™
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 The Data Library  Pat Daley
Ongoing datasharing projects, downloadable Excel spreadsheets, and other sources of data on the Web. Collaborative Projects  specific data collection projects that teachers and their students may become a part of; Data Sets that can be downloaded as
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 Datamath Calculator Museum  Joerg Woerner
Historical calculators and educational toys, primarily from Texas Instruments. History of calculators, technical details, many interesting sidelights, including downloadable emulators.
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 Data Paint  Man Machine Interface, Inc.
Statistical utility software for for MS windows 95, 98, NT4.0, 2000, that uses GUI (Graphical User Interface) language to link charts, graphs and statistical information about selected groups of data. For each graph and statistics window, there is a corresponding
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 Datexx On Line
Personal electronics to purchase: basic calculators, clocks, computer accessories, desktop calculators, organizers, printing calculators, scientific calculators, toys and games.
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 DAU Math Refresher Tutorial  George Mason University
An interactive tutorial that uses a subway map as a metaphor for moving through the lessons, giving a comprehensive view of basic mathematics, covering arithmetic, fractions, exponents, logarithms, quadratic equations, series, functions, limits, domains
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 Dave's Geometric Pix Gallery  David Joyce; Dept. of Mathematics & Computer Science, Clark University
Mandelbrot and Julia sets, with a generation form and an Explorer on which you can point and click to get more refined images;
Newton Basins and a form to generate them; a page describing tiling the hyperbolic plane; some wallpaper groups; a gallery
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 Dave's Mathematics, Education, Philosophy and Chreods Server  Dave Wilson
Searchable math and mathematics education resources: an archive of preservice teachers' essays, the Teaching and Learning Enquiry Group, Chreods, a journal covering math education, and other writings.
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 Dave's short course on Complex Numbers  David Joyce; Clark University
An introduction to complex numbers, including a little history (quadratic and cubic equations; Fundamental Theorem of Algebra, the number i) and the mathematics (the complex plane, addition, subtraction; absolute value; multiplication; angles and polar
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 David Bailey's World of Tessellations  David Bailey
Some high quality tessellations of a "representational" nature, as exemplified by M.C. Escher. Includes notes on the designs themselves, the design process, the history of tessellations, and references.
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 David Eppstein's Teaching  David Eppstein
Archives of Information and Computer Science courses in computational statistics, computability, design and analysis of algorithms, computational geometry, game programming (Java versions of mancala, othello, and fanorona), graduate data structures, computational
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 David Goodman's Math Links  David Goodman, editor
Link listings for a variety of topics, organized by those topics.
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 David J. Wright  Mathematics Dept., Oklahoma State University
Wright's main field is number theory, particularly algebraic number theory and algebraic groups, with methods from functional analysis and analytic number theory. Papers: Observations of N. Katz on the finer distribution of Gauss sum angles and similar
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 David Marius Bressoud
David Bressoud has written several undergraduate textbooks that use physics and the history of mathematics to motivate the study of multivariable calculus, number theory, real analysis. Other books include A Course in Computational Number Theory and
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 The David Mulhall Centre  David Mulhall
Site with resources and suggested treatments for people with Dyslexia, Dyscalcula, Dyspraxia and Attention Deficit Disorder. Extensive site, linking to The David Mulhall Centres in London and the UK.
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 David Royster's Home Page  Dept. of Mathematics, Univ. of North CarolinaCharlotte
Research and Scholarly Interests  Papers: Algebraic and Differential Topology; Use of Computer Algebra Systems in Mathematics Education. See also MAED 3103, a course for Secondary School mathematics teachers covering material drawn from Algebra I and
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 David's Math Pages  David E. Dirkse
Freeware includes GraphicsExplorer (plotting equations, curve fitting, differentiate, integrate, use constants a,b,c changable at mouseclick, graphics adjust...), linEq (solve systems of lin. equations and watch GaussJordan elimination step by step...),
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 DavidsoftNet  David Strauss
A site that organizes and presents Texas Instruments (TI) calculator software and other resources on the Web in folders and categories, much like Yahoo. TI Calculator links are broken down into assembly coding sites, hardware sites, major sites, TI85
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 David Sumner's Home Page  David Sumner
Study guides, exams, quizzes, problem sets, exam review materials, utilities, programs and simulations, syllabi, and other materials for courses such as calculus, sequences and series, graph theory, number theory and cryptography, and probability. The
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 DavidZiskind.Org  David Ziskind
Articles discussing variational problems, ordinary differential equations, series reversion, least squares regression, quantifiers, extrema, internal rate of return, and other mathematical topics.
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 DC Proof  Dan Christensen
New software to teach the fundamentals of logic and proof. Enables user/student to write errorfree proofs by selecting rules of inference, axioms, etc. from convenient dropdown menus. Includes tutorial with exercises.
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 DeadLine OnLine  Ionut Alex. Chitu
Freeware that graphs equations and precisely estimates their roots. It includes the option to evaluate the function and the first two derivatives, find extrema of the function and integrate numerically. For Visual Basicenabled computers running Windows
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 Deal or No Deal > Game  NBC
A Flash version of the television game show hosted by Howie Mandel. Begin by choosing one of 26 briefcases. Each contains cash  as little as one cent to as much as one million dollars. Then either stay with your original briefcase choice or make a "deal"
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 Decibels (Math Chat)  Frank Morgan, MAA Online
Challenge: The Christian Science Monitor of July 8, 1999, reports that "according to the NRDC, the amount of ambient noise in the ocean may have increased by 10 decibels  in other words, 10fold  between 1950 and 1975." Is this correct?
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