- 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 multi-variable 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 Carolina-Charlotte
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 Graphics-Explorer (plotting equations, curve fitting, differentiate, integrate, use constants a,b,c changable at mouseclick, graphics adjust...), linEq (solve systems of lin. equations and watch Gauss-Jordan 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, TI-85
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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 error-free proofs by selecting rules of inference, axioms, etc. from convenient drop-down 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 Basic-enabled 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, 10-fold - between 1950 and 1975." Is this correct?
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- Decimals and Logarithms in the Works? And a Dyer's Hand too? - Penn Leary
Shakespeare, Decimals and Logarithms: What did Shakespeare know about mathematics, particularly logarithms and the decimal system? And when did he know it? An article partly from Leary's book, The Second Cryptographic Shakespeare.
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- Decision Analysis Society (DAS) - INFORMS
DAWeb promotes the development and use of logical methods for the improvement of decision-making in public and private enterprise. Such methods include models for decision-making under conditions of uncertainty or multiple objectives; techniques of risk
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- Decisioneering, Inc.
Excel-based decision analysis software tools (Crystal Ball, CB Predictor) for risk analysis and business forecasting.
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- Decision Sciences Institute
An interdisciplinary, international organization dedicated to the advancement of the science and practice of education and research about business decisions. Publishes the Decision Sciences Journal.
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- Decision Tree for Optimization Software - Hans D. Mittelmann, P. Spellucci
Information on optimization software and optimization research, including links to a dictionary, tutorials, testcases, interfaces, and software.
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- Deck-u-lator - Michael B. Moore
For your collectible trading card games, especially Magic: the Gathering. Deck-u-lator calculates the percentage that a card combination will occur in the first cards dealt off the top of the deck. The calculator uses multivariate hypergeometric distribution.
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- Deep in the Jungles - Ivars Peterson (MathTrek)
Humans are predisposed to seeing order and meaning in a world that too often presents random choices and chaotic evidence. Random events sometimes get linked into a meaningful, though ultimately bogus, scenario... At the same time, the mathematics of
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- Defending the Roman Empire - Ivars Peterson (MathTrek)
Questions of military strategy can be handled mathematically. Charles S. ReVelle of Johns Hopkins University in Baltimore and Kenneth E. Rosing, recently retired from Erasmus University Rotterdam, describe their approach in the August-September American
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- Dekov Software
Educational software, a journal of computer-generated Euclidean geometry, and a computer-generated encyclopedia of Euclidean geometry. Current software titles include: Solving Triangles (step-by-step solutions to triangle problems in elementary geometry);
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- Delaware State Data Center - Delaware Economic Development Office
A focal point for the distribution of census information in Delaware and for the dissemination of other information from the federal government, state government and other sources, coordinating the use of census and other data for economic development.
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- Delphi For Fun - Gary Darby; Intellitech Systems Inc.
Delphi is based on the Pascal programming language developed in the early 1970s by Niklaus Wirth and named after mathematician Blaise Pascal. This site explores the use of programming as a tool in math problem solving, discussing interesting problems,
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- Delta Blocks - Hop David
A way to model different 3-D tessellations and a tool for studying geometry, crystallography, and polyhedra. Delta blocks were inspired by M. C. Escher's print "Flatworms," which he said demonstrates that one can build a house not only with the usual
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- Demography: the Java Version - Daniel Udovic, Joshua Coxwell
Java Demography 2.0.2 simulates growth in age structured populations. The program's click and drag features allow users to directly manipulate the fertility and mortality graphs and the population's current age distribution, represented as a bar chart
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- The De Morgan Journal - London Mathematical Society
The De Morgan Journal aims "to encourage academic mathematicians to reflect on current issues in mathematics education at all levels, from primary school to graduate studies; to encourage them to explore links between higher mathematics and elementary
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- Demos with Positive Impact - David R. Hill and Lila F. Roberts
Demos with Positive Impact organizes effective math teaching tools. Submit your own demo, or browse the existing collection of physical demos, calculator demos, databased demos, browser-based demos, and software demos, each with statements of objectives,
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- Demos with Positive Impact - David R. Hill and Lila F. Roberts
A collection of classroom demonstrations that use some form of instructional technology. The authors invite others to submit demos and provide them with feedback on the demos already collected. Demos are organized under the levels of Pre Calculus, Calculus
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- Departamento de Didáctica de la Matemática - Universidad de Granada
The University of Granada's Department of Mathematics Instruction features research groups, each with bibliographies of downloadable publications and other resources, on numerical thinking (pensamiento numérico), statistics education (educación
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- Department of Higher Mathematics, Physico-Technical Institute - Moscow State University
In Russian. Information on the department, study materials (textbooks and study aids by the dept. teachers, previous exams, lists of programs and classes and conferences for the current year), and information and download of a mathematical computer program
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- Department of Logic - Faculty of Philosophy, Moscow State University, Russia
In English and Russian. History of the department, staff, books, papers, courses, news.
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- Department of Mathematical Sciences - U.S. Military Academy, West Point
Publications include Cryptologia, CASE (Computer Algebra Systems in Education), Mathematica Militaris, and PRIMUS (Problems, Resource, and Issues in Undergraduate Mathematics Studies). MathTECH is a research project that provides Java applets and TI-89
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- Dept. of Statistics - University of Illinois at Urbana-Champaign
Web pages generated by statistics courses; biographical sketches of faculty, staff, lab members, and graduate students; department newsletter. Graduate program admission requirements, degrees offered, courses, statistical consulting services, and The
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- Derivations of Applied Mathematics - Thaddeus H. Black
An open-source book on the essential ideas underlying the derivations of a large number of mathematical results useful in the modeling of physical systems. PDF, with LaTeX source available under the GNU General Public License.
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- Derivative and Integral - Bill Finzer, Key Curriculum Press
Two sketches demonstrating elementary calculus concepts. Each sketch shows the graph of a function and the graph of its derivative. One sketch lets you change the graph of the function and watch the effect on its derivative. The other sketch lets you
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- Derivative Calculator - David Scherfgen
Compute derivatives of functions online, for free. Supporting symbolic computation of the 1st, 2nd, and subsequent derivatives of multivariable functions, the Derivative Calculator dynamically typesets expressions while you type them. derivative-calculator.net
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- Derivatives Page - Financial Pipeline
Derivatives are financial securities whose value is derived from another "underlying" financial security. Options, futures, swaps, swaptions, and structured notes are all examples of derivative securities. Derivatives can be used in hedging, protecting
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- Derive - Texas Instruments, Inc.
DERIVE software is a Computer Algebra System (CAS) for personal computers (Windows, DOS). In addition, the CAS technology in DERIVE is incorporated in TI-89 and TI-92 calculators. Derive applies the rules of algebra, trigonometry, calculus, and matrix
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- Descartes' Rule of Signs - Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A discussion by Scott Brodie of the basis of the attribution to Descartes of the proposition now known as Descartes' Rule of Signs: The number of positive roots of a polynomial with real coefficients is equal to the number of "changes of sign" in the
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- Description of the Julia sets of the Cauliflower fractal - Frans Faase
Investigation of the Julia sets of the Cauliflower fractal, which is a fractal generated by two linear translations with three parameters. The generated fractal can either be solid, connected, or disconnected. The author shows that two Julia sets consisting
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- Design, Analysis, Implementation, and Evaluation of Graph Drawing Algorithms - Petra Mutzel
Automatic Graph Drawing is a relatively new field in Computer Science. The task is to draw diagrams of objects and their relations in such a way that they are easy to read and understand. Applications are, e.g., animation of algorithms, data and flow
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- Design Resources on the Web - Mathematics Research Center, Univ. of London
Links to web-based resources for design theory and related parts of discrete mathematics and statistics (coding theory, finite geometry, combinatorics, graph theory), with an annotated list of lecture notes and related links.
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- Design Science - Design Science, Inc.
Math publishing and presentation tools for the web: MathType, the professional version of Equation Editor, for Windows or Mac; WebEQ, for building interactive math web pages; MathFlow, math publishing for the enterprise; and MathPlayer, to display MathML
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- Designs, Codes and Cryptography - Kluwer Online
An international, searchable, archived, peer-reviewed technical journal publishing survey and original papers on design, codes, and cryptography.
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