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  All Sites - 5506 items found, showing 4001 to 4050

  1. The Physics of Baseball - Alan Nathan
    Read about the benefits (or not) of corked bats, the differences between aluminum and wood bats, the issues involved with characterizing the performance of bats from a physics point of view, and a description of the collision between a wooden bat and ...more>>

  2. Physics Problems for the Next Millennium - David Gross, Institute for Theoretical Physics, University of California, Santa Barbara
    The ten most important unsolved problems in fundamental physics, as formulated by participants of the University of Michigan's Strings 2000 Conference: Are all the (measurable) dimensionless parameters that characterize the physical universe calculable ...more>>

  3. Physics Simulation in Java - Erik Neumann
    Physics simulations, including springs and masses (various configurations), pendulums (single, double, chaotic), and roller coasters. You can move objects or change parameters like gravity, friction, etc. ...more>>

  4. Physics Simulations in Java - Erik Neumann
    Twenty different Java-based, interactive, classical mechanics simulations: springs and masses, pendulums, roller coasters, etc. Move objects or change parameters like gravity, friction, etc. Full math explanations and free source code is provided. ...more>>

  5. Physics ToolChest: Vector Algebra Tools - ToolChest Software, Inc.
    Multimedia educational software in physics and mathematics. Advanced calculators and study aids for high school and college students. ...more>>

  6. Pi: A 2000-Year Search Changes Direction - Adamchik, Wagon
    A New Formula for Pi: David Bailey of NASA/Ames and Peter Borwein and Simon Plouffe of the Centre for Experimental and Computational Mathematics at Simon Fraser University (BBP) have discovered a remarkable and remarkably simple new formula for Pi. Sum ...more>>

  7. Pi and the Fibonacci Numbers - Ron Knott
    Contents: How Pi is calculated (Measuring the steepness of a hill; The tangent of an angle; The arctan function; Gregory's Formula for arctan(t); Radian measure; Gregory's series and pi; Using Gregory's Series to calculate pi; Machin's Formula; Another ...more>>

  8. Pi Approximation Day Greeting Cards - 123Greetings
    123Greetings - Send Free Electronic Greeting Cards to Friends and Families all over the World. There are no images available for Pi Approximation Day, but backgrounds and a variety of slogans are available, and you can write your own. ...more>>

  9. Pi: A Source Book - J. Borwein, Springer-Verlag
    A complete history of pi, with resources for teachers for anything from special topic courses to individual talks and special student projects. The literature on pi included in this source book falls into three classes: a selection of the mathematical ...more>>

  10. Pick a Digit, Any Digit - Ivars Peterson (MathTrek)
    One of the most amazing mathematical results of the last few years was the discovery of a surprisingly simple formula for computing digits of the number pi. Unlike previously known methods, this one allows you to calculate isolated digits - without computing ...more>>

  11. Pick a number from 1 to 10 ... for SCIENCE! - Alec Perkins
    "When asked 'pick a number from 1 to 10,' people tend to pick certain numbers more than others, in particular 7 and 4 over the extremes...." Participate by choosing your own number; see bar graphs and line plots of data submitted thus far according to ...more>>

  12. Picking Winners - Ivars Peterson (MathTrek)
    One of the attractive features of spectator sports is the uncertainty of the outcome. Even when one team is overwhelmingly favored to win, the underdog may still come through with a surprising victory. Nonetheless, the ability to pick winners can be of ...more>>

  13. Pick's Theorem - Cut the Knot!, Alexander Bogomolny
    A description with proof of Pick's theorem, including links to further pages including exercises with an applet for the geoboard, Farey Series, and Stern-Brocot Tree. An interactive column for MAA Online that uses a Java applet to simulate a puzzle or ...more>>

  14. Pi Digit Pendants - Cliff Spielman
    The first 3,456 digits of the decimal expansion of pi — microscopically printed on a silver-plated, 15mm square. Fibonacci, prime number, and other variations available from Spielman's MicroPendants site. Jewelry available as a free-standing pendant, ...more>>

  15. The Pi-Dye T-Shirt Shop - Josh Cummings
    Purchase from a variety of pi and other math t-shirts, mugs, clocks, etc., including the famous MathSpeak t-shirt. ...more>>

  16. Pi Mu Epsilon
    Pi Mu Epsilon, Inc., an honorary national mathematics society, was founded on May 25, 1914 at Syracuse University. It is a non-secret organization, the purpose of which is the promotion of scholarly activity in mathematics among the students in academic ...more>>

  17. Pinpointing Prey - Ivars Peterson (MathTrek)
    The sand scorpion uses two types of sensors on the tips of its legs to detect mechanical vibrations transmitted over relatively short distances across the surface. One sensor, called the basitarsal slit sensillum, detects surface waves, or ripples. The ...more>>

  18. The Pi Pages - Centre for Experimental and Constructive Mathematics (CECM)
    "Pi is one of the few concepts in mathematics whose mention evokes a response of recognition and interest in those not concerned professionally with the subject. It has been a part of human culture and the educated imagination for more than twenty five ...more>>

  19. Pi-Search
    Search the first four billion binary digits of Pi for a string. Enter the string in hex (4 bit) or character (5 bit) format. Includes some statistics (probability of occurrence of characters, digits). Related links include articles and papers. ...more>>

  20. The Pi-Search Page - Dave Andersen
    Search the first 50 million digits of pi for any numeric string up to 120 digits. The page also documents a few observations about pi's numeric strings, including self-locating strings, palindromes, and month-day combinations. ...more>>

  21. Pi Squared over Six - Clive Tooth
    "This value, (pi^2)/6, seems to crop up quite often in mathematics. I think that most of these occurrences can be traced back to the fact that it is the sum of the reciprocals of the squares of the positive integers...." See the first 500 decimal places ...more>>

  22. Pi Symphony - Lars Erickson
    Lars Erickson composed the Pi Symphony in the early 1990's. The themes and melodies of this 14 minute orchestral piece are directly based on pi's first 32 digits, with countermelodies developed from the number e. Listen to samples of Erickson's musical ...more>>

  23. Pitfalls of Data Analysis - Clay Helberg
    Subtitled "... or How to Avoid Lies and Damned Lies," this paper discusses what people "often overlook in their data analysis, and ways people sometimes 'bend the rules' of statistics to support their viewpoint." Tips to ensure the clarity and accuracy ...more>>

  24. Pi Through the Ages - MacTutor Math History Archives
    A history of pi: the Rhind papyrus (Egypt), Ptolemy, Tsu Ch'ung Chi, al'Khwarizmi, Al'Kashi, Viet, Romanus, Van Ceulen, Gregory, Shanks, Lambert, Euler, Buffon, and many more, with other Web sites and 30 references (books/articles). ...more>>

  25. The Pi Trivia Game - Eve A. Andersson
    Test your knowledge of history, mathematics, and even a little physics. Here are 25 (given to you 5 at a time) pi-related questions, picked randomly from a pi question database. Also at http://cid.com/~eveander/trivia/. ...more>>

  26. pLab: Random Number Generation - Peter Hellekalek; Mathematics Dept., University of Salzburg
    Results and links on this fundamental topic in stochastic simulation. RNGs are deterministic algorithms that produce numbers with certain distribution properties. Roughly speaking, these numbers should behave similar to realizations of independent, identically ...more>>

  27. Planar Geometry (The Geometry Junkyard) - David Eppstein, Theory Group, ICS, UC Irvine
    An extensive annotated list of links to material on planar geometry. ...more>>

  28. Planarity Flash Game - John Tantalo
    Arrange the vertices such that no edges overlap. Solve graphs of increasing difficulty, accumulating points based on the number of moves and the time it took to make them. ...more>>

  29. Plane Geometry by Shalosh B. Ekhad, XIV - Doron Zeilberger
    A textbook entirely written in Maple, "by" Shalosh B. Ekhad, XIV (ca. 2050), "downloaded from the future" by Doron Zeilberger. Code provided, with illustrations and instructions. ...more>>

  30. Plane Geometry Web Pages - David Jaffe
    Materials from a geometry course originally taught to future middle and high school teachers. Using definitions, theorems, proofs, and examples, the site introduces mappings; isometries and similarities; angles and trigonometry; congruence and similarity; ...more>>

  31. Plane Graphic Calculator - J. E. Lillge
    A Java calculator that can plot graphs of mathematical functions. Intended primarily as an educational aid to understanding the geometric interpretation of mathematical functions, it also supports complex numbers, vectors, and parametrically defined functions. ...more>>

  32. Plane Patterns - Ivars Peterson (MathTrek)
    Exploring the link between mathematical symmetry and artistic effort. One- and two-dimensional repeating patterns appear ubiquitously on surfaces, from quilts and colored fabrics to pottery and ceramic tiles... Analyzing the symmetries that underlie such ...more>>

  33. Planes of Budapest - Ivars Peterson (MathTrek)
    Nearly every Sunday during the winter of 1933 in Budapest, a small group of students would meet somewhere in the city at a park or cafe to discuss mathematics. The gathering typically included Paul Erdös (1913-1996), György (George) Szekeres, ...more>>

  34. Planet Math
    Designed to be a central repository for mathematical knowledge on the web, with a pedagogical slant. All content is user-contributed, either to the Encyclopedia or to the reviewed listings of papers, books, and lecture notes. Polls, discussions, and feedback ...more>>

  35. PlanetMath.Org Article Browser - martin.czygan
    All articles from PlanetMath.org ordered by pagerank--an attempt to sort math topics by importance (according to the pagerank algorithm). Incoming and outgoing links for an article are shown in an unobtrusive user interface. ...more>>

  36. Planetqhe (Probabilistic Learning Activities Network) - David Kay Harris
    Out-of-the-ordinary probability problems. The site focuses on using methods of probability to solve counter-intuitive problems and deepen students' understanding and competence in the domain. Sections include: a brief history and rationale of the site; ...more>>

  37. The Planimeter - Paul Kunkel
    The planimeter is a drafting instrument used to measure the area of a graphically represented planar region. The region being measured may have any irregular shape, making this instrument remarkably versatile. ...more>>

  38. plantri and fullgen - Gunnar Brinkmann, University of Bielefeld, and Brendan McKay, Australian National University.
    Programs for generating certain types of planar graph. Graphs are generated in such a way that exactly one member of each isomorphism class is output without the need for storing them. The speed of generation is more than 100,000 graphs per second in ...more>>

  39. Plato: Acceptance of Astronomy as a Science - Michael Tirabassi
    Translations from Plato's Dialogues (Loeb edition): The Myth of Er (a multihemispere model of the sky - Republic, X, 616B-617). The True Astronomer Must be the Wisest of Men (Epinomis 990a); Pursue Astronomy as you Would Geometry (Republic 530b); Realise ...more>>

  40. The Platonic Solids and Polyhedra - Paul Flavin
    The 5 Platonic Solids and one odd-ball polyhedron (a soccer ball). The kinship among the polyhedra is reflected in a 'family photo'. The polyhedra are laid out in a triangular pattern, with the tetrahedron alone in its row, joined with the other Platonic ...more>>

  41. Platonic Solids - Paul Bourke
    Definitions, formulas, and illustrations of the three-dimensional regular polyhedra: tetrahedron, octahedron, hexahedron (cube), icosahedron, dodecahedron, including the solids as drawn in Kepler's Mysterium Cosmographicum, and as represented in stone ...more>>

  42. Platonic Spheres (Dr. Neubert's Website) - Karl-Dietrich Neubert
    A systematic approach to generating the Platonic bodies, using Java applets. A major aspect is the inclusion of Descartes' concept of angular deficit as a measure of curvature. An extension of Platonic bodies to Platonic spheres. ...more>>

  43. Plato's Molecule - Ivars Peterson (MathTrek)
    In his dialogue Timaeus, the Greek philosopher Plato (427-347 B.C.) carefully laid out his reasoning for ascribing certain geometric shapes to the minuscule particles that constituted the four elements of matter. In his view, these elements - fire, air, ...more>>

  44. A Playground of Thoughts - Takasugi Shinji
    Takasugi's "Number Systems of the World" lists dozens of languages; how to count from zero to one hundred in each; and the mathematical meaning of the expressions for each numeral. For example, the French say "93" with quatre-vingt-treize, which means ...more>>

  45. Playing with Ruth-Aaron Pairs - Ivars Peterson (MathLand)
    On April 8, 1974, Henry (Hank) Aaron hit his 715th major league home run, surpassing the previous mark of 714 career home runs long held by baseball great Babe Ruth. Understandably, the event received considerable coverage in newspapers and magazines ...more>>

  46. 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>>

  47. 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>>

  48. 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>>

  49. 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>>

  50. Plouffe's Inverter: Table of current records for the computation of constants
    Classical constants: Pi, 1/Pi, E, Catalan, Zeta(3), Euler's gamma, log(2), Golden Ratio, Square root of 2, N'th binary digit computations, other interesting computations (Bernoulli numbers, Zeros of Riemann's Zeta Function, Madelung Constant, Khintchine ...more>>


 
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