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  All Sites - 5519 items found, showing 4051 to 4100

  1. Plexagon - Pleated Hexagon - Paul Bourke, Ron Evans
    Plexagon is a new modular geometry based on the radial pleating of polygonal plates, and their joining or co-bracing into 3D modules. This engineering approach can form a very practical basis for modular greenhouses (using recycled plastic sheeting) and ...more>>

  2. Plot a Graph - Vladimir Sorokin; University of Kentucky
    An applet that allows you to enter and plot functions of one variable. Enter an expression with a variable x to be plotted, the number of points to calculate, and the range of your variable in the corresponding textfields below the plotting area, and ...more>>

  3. Plotting Functions of a Complex Variable - George Abdo, Paul Godfrey
    Graphs of functions of a complex variable, compared with graphs of functions of a real variable (the Introduction includes a review). Includes Conformal Maps requiring Möbius and Schwartz-Christoffel Transformations. Full color images show conformal ...more>>

  4. Plouffe's Inverter - Simon Plouffe
    A database of more than 84,800,000 mathematical constants like Pi, Sqrt(2), Catalan and Euler's gamma. Enter a number, search or browse, and the programs will find what the number is made of. From the author of the Encyclopedia of Integer Sequences (with ...more>>

  5. Plusepsilon.de - Marc Palm
    Question-and-answer German language platform for undergraduate and graduate math students. Browse or search questions by users, by tags of math topics, and other options. Not intended as a discussion platform, Plusεpsilon rewards participation ...more>>

  6. Plus Magazine - Department of Applied Mathematics and Theoretical Physics, University of Cambridge
    Plus (formerly PASS-Maths) is a triannual online magazine for older pupils and the general public. It publishes articles explaining the diverse applications of mathematics used in solving problems in physics, chemistry, biology, engineering, and economics. ...more>>

  7. PM Zone Science Search - Popular Mechanics
    Enter words describing a concept or keywords you wish to find information about to conduct a keyword search of the science/technology magazine Popular Mechanics. For topics other than science, see the PM Search Page. ...more>>

  8. PNA: Revista de Investigación en Didáctica de la Matemática
    PNA is a peer-review open access research journal published by the Spanish research group "Mathematics Education. Numerical Thinking" of the Andalusian Plan of Research. This journal includes papers in English and Spanish related to the teaching and learning ...more>>

  9. Podcast Directory: Math - Podseek
    Podcasts of various math instruction and tutorials. Log in to rate or review the links. ...more>>

  10. Poem about the Riemann Zeta Function - Tom Apostol
    A poem about the zeta function and the Riemann hypothesis, linked to explanations of the important concepts by Chris Hughes. ...more>>

  11. Poe's Secret - Ivars Peterson (MathTrek)
    Writer Edgar Allan Poe (1809-1849) is famous for his short stories of the mysterious and the macabre. His popular tale "The Gold-Bug," published in 1843, is often cited as one of the best works of fiction that turn upon a secret message. Poe had a longstanding ...more>>

  12. Poincaré Notes - Dave Wilson
    "A massively disorganised collection of macros and figures for the Poincaré Disk model of hyperbolic geometry." A page describing some Cabri macros relating to hyperbolic Geometry in the Poincare disc model. ...more>>

  13. Point Plots and Space Curves - Theo Gray
    Download a Mathematica notebook that defines the functions PointParamPlot3D, SpaceCurve, and PointSpaceCurve. These functions let you make discrete point plots in two and three dimensions. The SpaceCurve and PointSpaceCurve functions let you make three-dimensional ...more>>

  14. Poisson Pit: Poisson Probability Calculator - Chuck Anesi
    Variously called the Poisson Distribution, Poisson Law of Large Numbers, or Poisson Distribution for Rare Events, the probability function for this discrete distribution of one parameter is given on this site. The Poisson distribution is usually employed ...more>>

  15. Poles and Zeros of a Causal LTI System - Manfred Thole
    A Java applet that shows the domain of a system whose transfer function has two poles and two zeros. Poles and zeros can be dragged with the mouse. The amplitude response and the phase response are shown along the side. Plot: |H(s)| may take a while. ...more>>

  16. Poliplus Software
    Educational computer algebra, geometry, trigonometry, calculus software for Windows and Macintosh, and Java. Formulae 1 (F1) is a computer algebra system designed for the teaching and exploration of Mathematics. EqnViewer is a Java applet that allows ...more>>

  17. Polish Mathematical Society, Cracow Division
    Council, Committees, Delegates, report of Plenary Meeting; Contact details. ...more>>

  18. POLYA: Cooperative Solutions of Difficult Problems in Elementary Mathematics - Paul Yiu and Xiaodong Zhang, Moderators; Department of Mathematical Sciences, Florida Atlantic University
    An archived discussion group for the cooperative solution of difficult problems in elementary mathematics through calculus, "preferably non-technical in nature." ...more>>

  19. Poly and Poly Pro - Pedagoguery Software
    Mac and Windows shareware programs for exploring and constructing paper models of polyhedra. With Poly, you can manipulate a polyhedral solid on the computer and print out a flattened version (a net) which can then be cut out, folded, and taped, to produce ...more>>

  20. Polygon Boolean operations on sets of polygons - Klaas Holwerda
    Boolean: GDSII viewer/editor + (boolean) operations on sets of 2d polygons. Operations; Introduction; screenshots; C ++ source, executables and documentation for download; Acknowledgments, Feedback, mailing list; documentation (algorithm); documentation ...more>>

  21. PolygonFlux - John Miller
    An iPad app for exploring the path taken by a point bouncing around inside a regular polygon of 3 to 14 sides. Set the initial angle and starting location, the number of bounces, and the number of sides for the polygon; collect an album of resulting "fluxagons" ...more>>

  22. Polygons, Polyhedra, Polytopes - Russell Towle
    Polytope is the general term of the sequence, point, segment, polygon, polyhedron, ... . Towle offers several pages devoted to the theory of polytopes, from polygons to star polytopes in 4-space, including Mathematica notebooks with constructions. ...more>>

  23. Polyhedra - Albert P. Carpenter
    Photos of paper models of discontinuous "nolids," or zero-volume polyhedra. Inspired in part by the work of Allan Holden and his book Shapes, Space and Symmetry, Carpenter's images include antinanotubular polyhedra; carbon based nanostructures (polyhedra ...more>>

  24. Polyhedra and Polytopes (The Geometry Junkyard) - David Eppstein, Theory Group, ICS, UC Irvine
    An extensive annotated list of links to material on geometric properties of polygons, polyhedra, and higher dimensional polytopes (particularly convex polytopes). ...more>>

  25. Polyhedra Collection - V. Bulatov
    Galleries of polyhedra shown using JPEG pictures and 3D objects in VRML2.0 format. Uniform polyhedra; Duals; Compounds; Johnson's solids; 59 stellations of icosahedron; 270 stellations of deformed dodecahedron; symmetric stellations of rhombic triacontahedron: ...more>>

  26. Polyhedra (Geometry and the Imagination) - Conway, Doyle, Gilman, Thurston; The Geometry Center
    A polyhedron is the three-dimensional version of a polygon, a three-dimensional figure made by gluing polygons together. This handout discusses polyhedra, presents explorative activities, and supplies a "homework" assignment. Includes the first 20 Greek ...more>>

  27. Polyhedral Solids - Tom Gettys
    The study of polyhedra is one of those special areas of Mathematics which allow the amateur and expert to work with an equal delight. The Platonic Solids; The Archimedean Solids; The Kepler-Poinsot Polyhedra; Compound Solids; Stellated Polyhedra. See ...more>>

  28. Polyhedra - Peter Cromwell
    Ancient manuscripts from Egypt and China relate ideas concerning the calculation of the volumes of polyhedra, while the Greek tradition of geometry gave us the construction of the regular polyhedra or Platonic solids. In modern times, polyhedra and their ...more>>

  29. Polyhedra - Rolf Asmund
    A gallery of regular polyhedra, snub uniform polyhedra, deltahedra (polyhedra consisting only of equilateral triangles), and polychora; with animations, still graphics, and some taxonomic data (vertices, edges, faces, polygons, radii, and more). Mobius ...more>>

  30. Polyhedra Sketches - Bill Finzer, Key Curriculum Press
    Sketches showing the platonic solids in true perspective. You have control over the placement of the picture plane, the station point, and the horizon. An animation button rotates the figure. Some of the sketches show in 3D if you have a pair of 3D glasses. ...more>>

  31. Polyhedron: An application in solid geometry - Stelian Dumitrascu
    Software based on "deduction-free geometry," which allows the user to perform various actions upon solids as if holding these solids in your hands. It simulates a number of tools, such as the ruler, protractor, setsquare, compass, bisector, saw, and eraser. ...more>>

  32. Polymake - Ewgenij Gawrilow and Michael Joswig
    A tool for the algorithmic treatment of polytopes and polyhedra. Polymake has C++ and perl interfaces that allow the user to combine the wealth of available methods with his/her own implementations. ...more>>

  33. Polynomials Calculator - Xavier R. Junqué
    These online and downloadable calculators for basic math and polynomial operations handle matrices and output their inverses, determinants, eigenvalues, eigenvectors, cofactors, adjoints, transposes, Jacobians, and Jordan forms; calculate derivatives ...more>>

  34. Polyominoes - Kevin Gong
    Information and Polyominoes software to download. A polyomino is a piece made up entirely of squares connected edge-to-edge. For example, a domino is a polyomino with 2 squares. In this program, you can use pentominoes, tetrominoes, trominoes, hexominoes, ...more>>

  35. Polytopes, Zonohedra, Zonotiles, Mathematica notebooks - Russell Towle
    Some of the author's endeavors in geometry, including studies of zonohedra, polyhedra, space-fillings, polytopes in higher space, and the discovery of new types of polyhedra and space-fillers. Mathematica notebooks are provided which create these kinds ...more>>

  36. Ponder This - IBM Research
    Match wits with the minds in IBM Research, who post a new puzzle every month (some suggested by users at large), and welcome your solutions. Archives of previous challenges. ...more>>

  37. POP Mathematics (Mathematics Archives) - University of Tennessee, Knoxville (UTK)
    Did you ever wonder what made your teacher get so excited about some topic in Mathematics? On this page the Math Archives site collects items about Mathematics that may explain this weird behavior. Also included on this page are links they couldn't figure ...more>>

  38. Popular Science
    Browse the science and technology news magazine's math articles, where stories have included "Mathematician Cracks The Code for Making Hollywood Blockbusters," "Japanese Super Computer Calculates Pi To The 2.5 Trillionth Decimal Point," "Math, Art, and ...more>>

  39. Population Index 1986-1998 - Office of Population Research, Princeton University
    The primary reference tool to the world's population literature, presenting an annotated bibliography of recently published books, journal articles, working papers, and other material on population topics. It covers all fields of interest to demographers, ...more>>

  40. Positive and negative Euler characteristic (Geometry and the Imagination) - Conway, Doyle, Gilman, Thurston; The Geometry Center
    A symmetry pattern on the sphere always gives rise to a quotient orbifold with positive Euler characteristic. In fact, if the order of symmetry is k, then the Euler characteristic of the quotient orbifold is 2/k, since the Euler characteristic of the ...more>>

  41. The PostCALC Project - Duke University
    The PostCALC Project is a branch of the Connected Curriculum Library that presents interactive, mathematically-based modules designed for high school students who have finished a year-long course in calculus. These modules, each appropriate for several ...more>>

  42. The post-IMO97 web page - Olimpíada Matemática Argentina
    Problems and results from the math olympics held in Argentina in July, 1997. Available in English and Spanish, with problems also in French, Russian, German, and a host of other languages. ...more>>

  43. Postulates and Theorems of Boolean Algebra - Julie Kenrow; Santa Clara University, Santa Clara, CA
    Five postulates (identity, complement, commutative law, associative law, distributive law); and six theorems. Supplementary material for a course in electrical engineering (Logic Design). ...more>>

  44. POV-Ray - Persistence of Vision Raytracer Pty. Ltd
    The Persistence of Vision Ray-Tracer creates three-dimensional, photo-realistic images using a rendering technique called ray-tracing, which calculates an image of a scene by simulating the way rays of light travel in the real world. Download the latest ...more>>

  45. Powell's Books
    Located in Portland, Oregon, USA; the largest independent bookseller in the United States, specializing in technical books and new, used, hard-to-find, and antiquarian titles. An extensive subject and keyword list is available - search database of titles, ...more>>

  46. Power and Pedagogy: Transforming Education through Information Technology - Robbie McClintock
    A book from the Institute for Learning Technologies (ILTweb), Teachers College, Columbia University. Chapters include: The Computer as a System; The Educator's Mission; The Span of Pedagogical Possibility; Making a New Educational System; and Education ...more>>

  47. Power Maths - A pre-calculus project - Sidney Schuman
    A pre-calculus investigation designed to enable students to discover each calculus power rule independently (albeit in simplified form), and hence their inverse relationship. Students are required only to do simple arithmetic and some elementary algebra, ...more>>

  48. The Power of One - Robert Matthews, The New Scientist
    Benford's law demands that around 30 per cent of the numbers in a given data set will start with a 1, 18 per cent with a 2, right down to just 4.6 per cent starting with a 9. This essay provides a mathematical history behind the counterintuitive law, ...more>>

  49. Powersim
    A simulation software development company, offering consultant and support services for simulator design, construction, and use as well as the complementary software needed to build models and simulators. The site offers discussion groups, products, newsletters, ...more>>

  50. Powers of Ten - Eames Office
    An "adventure in magnitudes" that depicts the relative scale of the universe in factors of ten, originally written and directed by Ray Charles Eames in 1968. Starting at a picnic by a Chicago lake, every ten seconds this nine minute-long documentary short ...more>>

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