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  All Sites - 5532 items found, showing 1201 to 1250

  1. Distances on the surface of a cubical box - Henry Bottomley
    An applet that demonstrates distances across the surface of a rectangular box. The first three boxes are the dimensions of the cuboid. To change them, type new numbers in and then press the "You choose" button. The text box offers six almost self-explanatory ...more>>

  2. The Distribution of the Knight - the Theoretical Research Institute
    For every given starting point in the knight's tour problem, evaluate every possible path that visits each square exactly once, and then count how many solutions exist. Illustrations and calculations of the distribution of solutions and dead ends across ...more>>

  3. Divide and conquer for quantum computers - Ivars Peterson - Science News Online
    In theory, quantum computations can be speeded up significantly by letting many quantum computers work together in parallel on data encoded as particles in an entangled quantum state. ...more>>

  4. Divine Proportions: Rational Trigonometry and Geometry - N. J. Wildberger, Wild Egg Books
    Divine Proportions describes a new way of thinking about trigonometry and Euclidean geometry. It shows how to develop both subjects in a completely algebraic, or rational, way, without any need for transcendental concepts or functions. As a result the ...more>>

  5. Divisibility Criteria - Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
    A definition of some divisibility criteria, and their derivation from modulo arithmetic, with links to related pages. ...more>>

  6. Division by Three [PDF] - John Conway, Peter Doyle
    A formal proof that it is possible to divide by three. This assertion is easy to prove using the axiom of choice, but becomes a much more difficult problem if the axiom of choice is not allowed (as is the case here). From this proof, and the much simpler ...more>>

  7. Division by Zero - Dave Richeson
    A blog about "math, puzzles, teaching, and academic technology." Posts, which date back to September of 2008 and sometimes introduce original applets, have included "Volumes of n-dimensional balls," "Albrecht Dürer's ruler and compass constructions," ...more>>

  8. Divisor Plot - Jeffrey Ventrella
    "We hear of primes described as the 'building blocks' of all numbers. Let's turn that concept on [its] head. Instead, let's think of primes as the negative spaces behind complex objects. Imagine a series of picket fences stacked in front of each other. ...more>>

  9. Divulgaciones Matemáticas - La Universidad del Zulia
    Archives of the biannual Spanish-language research journal dating back to 1993. Most issues contain research papers (artículos de investigación), articles about teaching (artículos sobre enseñanza), expository and historical ...more>>

  10. DIY Calculator - Clive (Max) Maxfield and Alvin Brown
    Order the book How Computers Do Math, or preview its table of contents. The book's interactive laboratories guide you in the creation of a simple calculator program to run on your DIY Calculator; its accompanying CD-ROM contains a virtual "Do-it-Yourself ...more>>

  11. D. J. Bernstein
    Courses, research articles (in dvi format), and a list of available software, listed by a professor of mathematics and computer science at the University of Illinois. Pages are also listed by topic. Also at ftp://koobera.math.uic.edu/www/djb.html. ...more>>

  12. Dmitry Gokhman
    Papers (Hardy fields; Differential fields of complex germs; Applied mathematics), Class lecture notes and summaries, code (IGF, LibPS 2, Python, Perl, TeXtool 2.12a), courses, translations, guests. ...more>>

  13. DNA Adds Up - Ivars Peterson (MathLand)
    Calculating that 0 + 0 = 0, 1 + 0 = 1, and 0 + 1 = 1 is normally no big deal. When the calculations are done in the lab using DNA molecules, however, these elementary manipulations look considerably more interesting. In the July 12 [1996] Science, a team ...more>>

  14. DNA, Computers, and Killer Apps - Ivars Peterson (MathLand)
    When computer scientists look at DNA, they see information storage and processing. They view the four bases of DNA as something akin to the zeros and ones of the binary code by which computers store and process information. They look for algorithms, theorems, ...more>>

  15. Documenta Mathematica - Ulf Rehmann
    Documenta Mathematica is open to all mathematical fields and is refereed in the traditional manner. Tables of contents for past issues are available in dvi.gz, dvi, and ps.gz formats, and you can view or download entire volumes. ...more>>

  16. Dodecahedron Measures - Paul Kunkel
    An investigation of the formulas of the surface area and volume for the dodecahedron. With icosahedron extensions. ...more>>

  17. Does March Madness need a time-out? - J. Travis - Science News Online
    Suggestions about the effects of circadian rhythms, daily cycles of physiological activity that every organism experiences, and changes in time zone (causing 'jet lag'), on sports teams. ...more>>

  18. Donald Coxeter, Mathematician and Geometer - Great Canadian Scientists (GCS)
    Harold Scott MacDonald Coxeter, Professor Emeritus, Math Dept., Univ. of Toronto, is best known for his work in hyperdimensional geometries and regular polytopes - geometric shapes that extend into the 4th dimension and beyond. In 1926 he discovered a ...more>>

  19. Don Hatch's Home Page - Don Hatch
    Hyperbolic tessellations shown in various stages of truncation, and represented by their Schlafli symbols. Java applets explore hyperbolic tessellations, a magic Rubik's-like cube in four dimensions, polygon reciprocation (dual), modern portfolio theory ...more>>

  20. Don Knuth's Home Page - Donald E. Knuth, Stanford University
    From the author of The Art of Computer Programming. "Computer Musings" chronologically documents Knuth's informal lectures at Stanford. It also links to Musings Online, digitized versions of videos from the lecture series that included Dancing Links; ...more>>

  21. Doodling and Miracles - Cut the Knot!, Alexander Bogomolny
    Almost 100 years ago, Frank Morley proved a curious theorem from elementary geometry that had remained unknown until 1899. With time, the theorem became known in mathematical folklore as Morley's Miracle (Morley's Trisector Theorem is a more mundane term.) ...more>>

  22. The DOR: Home of the Direct Opposite Reverse - David P. Sterner
    Sterner developed this shape, which he calls a geometric "missing link", and has applications as a lens. ...more>>

  23. Doron Zeilberger's Electronic Headquarters
    Doron Zeilberger researches combinatorics using computer programs. The site is notable for his Opinions page; these opinions are wide-ranging but touch upon mathematics education, the use of computers, and the value of incomplete proofs. All of Zeilberger's ...more>>

  24. DOSE - G. B. Rubalsky
    Determine Optimal Stocks Efficiently (DOSE) stands for the two software products DOSE-TRADE and DOSE-SERVICE, solving optimal inventory control problems for trading enterprises and tech service enterprises. Both products work under Windows 95 and later, ...more>>

  25. Do software engineers need mathematics? - Keith Devlin (Devlin's Angle)
    Software engineers don't use their college mathematics, but they make use of their college mathematics education every day. Brains are perhaps the world's best examples of an adaptive system. When we subject the human brain to an extended educational ...more>>

  26. Do the Math - Slate
    A topical series about math in culture, politics, psychology, and other popular themes, many written by math professor Jordan Ellenberg. Articles, which date back to June, 2001, have included "Barry Bonds and the Placebo Effect," "Algebra for Adulterers," ...more>>

  27. DotNumerics - José Antonio De Santiago-Castillo
    DotNumerics is a Numerical Library for .NET written in C#. It provides routines for: Linear Algebra (CSLapack, CSBlas, CSEispack), Differential Equations, and Optimization. ...more>>

  28. Dot Patterns and Sierpinski Gasket - Cut the Knot!, Alexander Bogomolny
    How many ways are there to define the Sierpinski gasket (also, the Sierpinski triangle)? The author has counted a respectable 9 but would be happy to learn of more. An applet with rows of digits or circles with colors corresponding to the digits shows ...more>>

  29. Dots and Boxes - Ivars Peterson (MathTrek)
    The familiar pencil-and-paper game of Dots-and-Boxes can be played on several different levels of sophistication. Elwyn Berlekamp posits that the game can be played on at least four different levels. "Players at any level consistently beat players at ...more>>

  30. Double Bubble Conjecture Proved (Math Chat) - Frank Morgan, MAA Online
    Four mathematicians have announced a mathematical proof of the Double Bubble Conjecture: that the familiar double soap bubble is the optimal shape for enclosing and separating two chambers of air. In an address to the Undergraduate Mathematics Conference ...more>>

  31. Doug's Home Page - Douglas J. Ingalls
    Includes mathematical interests such as images of fractal applications of Newton's Method and Gibb's Phenomena, with related programs in FORTRAN and BASIC, a discussion of the apparent depth problem in optics, and how multiple decisions can be reduced ...more>>

  32. Downloadable Preprints - Dept. of Applied Mathematics and Statistics, Stony Brook
    Abstracts of papers (1991-) written by faculty and students in the department. Complete papers are available in PostScript, and can be downloaded from this site. They are also available via anonymous ftp. Recent Ph.D. Theses are also available. ...more>>

  33. Downloads - Mac - Mathematics - CNET Download.com
    Search this site to find a particular piece of software for the Mac, or browse their mathematics listings. ...more>>

  34. Downloads - PC - Mathematics - CNET Download.com
    Search this site to find a particular piece of software for the PC, or browse their mathematics listings. ...more>>

  35. DPGraph (Dynamic Photorealistic Graphing) - David Parker
    Software that allows you to: display multiple simultaneous dynamic photorealistic 3D implicit equalities and inequalities, and intersections of their volumes; spin, slice, and view time-dependent (moving) photorealistic surfaces in real time; and construct ...more>>

  36. DPlot Plotting Software for Scientists and Engineers - David Hyde
    A general purpose XY plotting program that features multiple scaling types, including linear, logarithmic, and probability scales, as well as several special-purpose plots: tripartite grids (shock spectra), grain size distribution plots, and polar plots. ...more>>

  37. Draft version of MSC2000 - European Mathematical Society (EMS)
    The proposed revision of the 1991 Mathematics Subject Classification (MSC), the classification used by the two reviewing journals Mathematical Reviews (MR) and Zentralblatt für Mathematik (Zbl) since the beginning of 1991. MSC2000 is the result of ...more>>

  38. Drawing Tools - Shai Duvdevani
    A growing group of .NET C# programs intended to make life easier for highschool and university students studying subjects such as math, computers and electronics. Each of these programs features saving and loading, so that sharing a drawing of logical ...more>>

  39. Drayton Analytics
    A provider of optimisation-related software to the Australian operations research community, and economic consulting services to the utility industries. ...more>>

  40. DreamCalc for Windows - Andy Thomas
    A freeware scientific calculator for Windows, intended to replace standard hand-held calculators. Fully featured range of math, scientific, statistical & financial functions. Supports natural fractions, complex numbers, base-n logic, unit conversions ...more>>

  41. Dream Frequency .com
    CGI web applications to calculate the factors of a number, calculate the prime numbers below a number, test a number for primality, calculate a word's position in the alphabetically sorted list, convert hex to ASCII, or convert temperature from celsius ...more>>

  42. The Drills To Play - Cut the Knot!, Alexander Bogomolny
    An exploration of a detail found at the beginning of Kurt Godel's biography by John Dawson, how repetition and practice constitute an integral and necessary part of the learning process; that, by implication, one first conceives an idea, then proves it ...more>>

  43. Dr Len Fisher: Opening the Door to Science - Len Fisher
    Fisher concentrates on the science of the everyday and making science accessible. His latest book is Rock, Paper, Scissors: Game Theory in Real Life. The site contains excerpts from his books as well as descriptions of his talks, articles about his work, ...more>>

  44. Dr. Rich's Page o' Math
    Math problems in algebra, trigonometry, and calculus, posted more or less monthly (past puzzles, with solutions, are on the Web). ...more>>

  45. Drums That Sound Alike - Ivars Peterson (MathLand)
    Peterson writes that physicists and mathematicians have long recognized that the shape of the boundary enclosing a membrane plays a crucial role in determining the membrane's spectrum of normal-mode vibrations. He outlines the progress made on Mark Kac's ...more>>

  46. Drunkard Walk - Vladimir Gusev
    An applet illustrating the one-dimensional drunkard walk algorithm, which describes the process of molecular diffusion in an equilibrium gas. ...more>>

  47. Dr. Vogel's Gallery of Calculus Pathologies - Thomas I. Vogel; Dept. of Mathematics, Texas A&M University
    In learning calculus, students develop intuitive ideas of such concepts as limit, continuity, differentiability, and so on, useful in dealing with simple examples, but potentially a hindrance to deeper understanding of the basic concepts of mathematical ...more>>

  48. DS Dynamical Systems (Front for the Mathematics ArXiv) - Univ. of California, Davis
    Dynamical Systems preprints, from the U.C. Davis front end for the xxx.lanl.gov e-Print archive, a major site for mathematics preprints that has incorporated many formerly independent specialist archives. Search by keyword or browse by topic. ...more>>

  49. DSP First: A Multimedia Approach - McClellan, Schafter, & Yoder
    The CD-ROM portion of the book, containing, for each chapter: Demos - quicktime movies, sound files, etc. that help reinforce the concepts introduced in the text; Labs - MATLAB based laboratory exercises for in-depth study of certain concepts and ideas ...more>>

  50. Duke University Math Union - Jadrian Miles
    The Duke University Math Union (DUMU) writes and hosts the annual Duke Math Meet. Download PDFs of problems and solutions from meets dating back to 1998. ...more>>


 
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