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  All Sites - 5549 items found, showing 4301 to 4350

  1. Puzzle World - John Rausch
    A searchable site with information and a discussion group (Puzzle Talk) about handcrafted mechanical puzzles. Most of the puzzles presented here are not the mass-produced variety found in stores, but limited production puzzles produced by craftsmen (often ...more>>

  2. Puzzling Lines - Ivars Peterson (MathTrek)
    Sol LeWitt has often featured geometric and combinatorial themes in his sculptures, paintings, and drawings. In 1973 he composed "Straight Lines in Four Directions and All Their Possible Combinations," a grid of 15 squares, each inscribed with one or ...more>>

  3. Puzzling Primes - Isaac Reed
    To fully comprehend our number system, mathematicians need to understand the properties of the prime numbers - but even finding them isn't so easy. ...more>>

  4. The Puzzling World of Barry R. Clarke - Barry R. Clarke
    Brain teasers from Clarke's column in The Daily Telegraph (UK) and from his various puzzle books: liar problems, logic teasers, number conundrums, matchstick puzzles, lateral mind-benders, and more. With links to other puzzles sites and an article on ...more>>

  5. pysimplex - Aaron Watters
    Mixed Integer Linear programming modules: pysimplex provides some basic symbolic programming tools for constructing, solving and optimizing systems of linear equations and inequalities. It includes an implementation of the classical SIMPLEX linear optimization ...more>>

  6. Pythagoras Plays Ball - Ivars Peterson (MathLand)
    Spring, baseball, statistics, math. In many ways, baseball is a numbers game: Strikeouts, home runs, batting averages, innings pitched, complete games, earned run averages, number of players left on base in scoring position in the bottom of the ninth ...more>>

  7. Pythagoras' Theorem: Elaboration on the Similarity Argument - Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
    Euclid included two proofs of the Pythagorean theorem in his Elements. A better known Proposition I.47 (Bride's chair) and VI.31 which is consistently overlooked in the introductory geometry courses. The latter, however, renders the theorem virtually ...more>>

  8. Pythagoras' Theorem in Babylonian Mathematics - MacTutor Math History Archives
    Linked essay examining four Babylonian tablets that all have some connection with the Pythagorean theorem. With references and other related web sites. ...more>>

  9. Pythagorean Puzzle (SMILE) - Earl Zwicker, Illinois Institute of Technology
    A lesson that models the phenomenological approach to enable students to prove the Pythagorean Theorem on their own using puzzle pieces and working together. From the Geometry and Measurement and Algebra and Trigonometry sections of a collection of almost ...more>>

  10. Pythagorean Theorem - Over 20 Proofs - Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
    A general exposition of the Pythagorean theorem, with proofs from Euclid to Garfield - and more. Also links to other sites on the Web with proofs. ...more>>

  11. Pythagorean Triples - H.B. Meyer
    A Javascript calculator for pythagorean triples. In English and German. ...more>>

  12. Pythagoreisches Tripelprogramm - Heinz Becker
    A Java applet that reads a and gives integer solutions of a^2+b^2 = c^2. In German and English. ...more>>

  13. Pythagoräische Tripel (Pythagorean Triplets) - H. B. Meyer
    A calculator for Pythagorean triplets, making visible the one-to one correspondence between triplets and certain pairs of relatively prime numbers, and an interesting correspondence with certain sequences of letters A, B, or C. (Javascript is required.) ...more>>

  14. QAMA - QAMA, LLC
    "The calculator that thinks only if you think, too," QAMA requires the operator to first enter a reasonable estimate. QAMA encourages rounding and rapid back-of-the-envelope reckoning, but does not tolerate errors of magnitude or sign, or of basic operations ...more>>

  15. QA Quantum Algebra (Front for the Mathematics ArXiv) - Univ. of California, Davis
    Quantum Algebra 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>>

  16. Qhull - The Geometry Center
    Download Qhull, software that computes convex hulls, Delaunay triangulations, halfspace intersections about a point, Voronoi diagrams, furthest-site Delaunay triangulations, and furthest-site Voronoi diagrams. It runs in 2-d, 3-d, 4-d, and higher dimensions. ...more>>

  17. QMG: mesh generation and related software - Stephen A. Vavasis; Computer Science Dept., Cornell University
    The QMG package does finite element mesh generation in two and three dimensions. The package includes geometric modeling software, the mesh generator itself, and a finite element solver. It is free software whose source code is downloadable from the Web. ...more>>

  18. Q-Puzzle - XIAO Gang
    A mathematical jigsaw puzzle: your goal is to recover a disordered photo by finding the inverse affine transformation. A French version is also available. ...more>>

  19. Quadralay's Cryptography Archive - Quadralay Corporation
    Encryption standards, frequently asked questions (FAQs), and newsgroups. Clipper, Digital Telephony, History of Cryptology, Internet Security, Kerberos, PGP, RIPEM, and a glossary. ...more>>

  20. Quadrangle - Nikolay Khizhnjak
    In Russian: Common properties of quadrangles, a cube and a circle are considered. ...more>>

  21. Quadratic Map - Ron Lee
    The Quadratic Map is the chaotic dynamical system composed of the following equation: x_n+1 = 4 lambda x_n(1 - x_n) with parameter lambda. The Java applet is a quadratic distribution plotter. ...more>>

  22. The Quadray Papers - Kirby Urner, 4D Solutions
    An Introduction to Quadrays. The game of quadrays starts with a regular tetrahedron and four rays pointing from its center to the four corners; these or any ray built from these rays are labelled 4-tuples - i.e. four numbers separated by commas and enclosed ...more>>

  23. The Quake Project - The Department of Civil and Environmental Engineering and the School of Computer Science at Carnegie Mellon University; and the University of Southern California's Southern California Earthquake Center (SCEC)
    An NSF and DARPA-funded project developing the capability for predicting, by computer simulation, the ground motion of large basins during strong earthquakes, and using this capability to study the seismic response of the Greater Los Angeles Basin. Research ...more>>

  24. QuantFinanceJob.com
    The quantitative finance community with tutorials, interview guides, questions and job searching resources for quants to land a successful financial engineering job on Wall Street. ...more>>

  25. QuantFinanceJobs.com
    The job board for quantitative finance, financial engineering and risk management. ...more>>

  26. Quantitative Environmental Learning Project (QELP) - Greg Langkamp and Joe Hull, Seattle Central Community College
    Supported by the NSF, QELP provides resources to integrate math and environmental science in college classrooms. It features data sets (search by math or environment topic), a book of classroom exercises, and links to relevant Web sites. Each data set ...more>>

  27. Quantitative Reasoning - Bill Briggs; Dept. of Mathematics, Univ. of Colorado at Denver
    Ideas and information about teaching Quantitative Reasoning courses (also called Mathematics for Liberal Arts Students), links to many Internet sites that support QR courses, and some information about a new QR book. Includes an article by William L. ...more>>

  28. Quantitative Reasoning for College Graduates: A Complement to the Standards - MAA Online
    What quantitative literacy requirements should be established for all students who receive a bachelor's degree? Over the years, the Mathematical Association of America has approached this question in various ways, most recently by establishing, in 1989, ...more>>

  29. QuantSpot
    A job search engine for quantitative finance, quant trading, financial engineering and risk management. ...more>>

  30. The Quantum Age Begins - MacTutor Math History Archives
    Linked essay describing the beginnings of quantum theory, from Kirchoff's blackbody radiation work in 1859 to Bohr, Einstein, and von Neumann in the 1930's, with 33 references (books/articles). ...more>>

  31. Quantum Games - Ivars Peterson - Science News Online
    Scientists studying quantum computation offer new perspectives on coin tossing, chess, and game theory. Theorists intend to apply the peculiarities of quantum behavior to game theory, two previously unrelated fields. These researchers propose that the ...more>>

  32. Quantum Information Page - John Aaron Smolin; UCLA Particle Beam Physics Laboratory (PBPL)
    Papers on quantum computation, cryptography, etc.; quantum information on the Net. ...more>>

  33. Quantum Lie Algebras - Gustav Delius
    A comprehensive, continuously updated bibliography of literature on Quantum Lie Algebras. Mathematica notebooks containing calculations and animations of quantum root systems are included. ...more>>

  34. Quantum-Quick Queries - Ivars Peterson - Science News Online
    Computer scientist Lov K. Grover of AT&T Bell Laboratories has found an an algorithm that relies on quantum mechanical principles that significantly speeds up the process of identifying a particular item in an unsorted list. Whereas the best possible ...more>>

  35. Quasigroups (Catalogue of Algebraic Systems) - John Pedersen, W. Edwin Clark; Dept. of Mathematics, University of South Florida
    Information about quasigroups from the Catalogue of Algebraic Systems. Definition, examples, decision problems, and links to related terms in the Catalogue. ...more>>

  36. QuasiTiler (Gallery of Interactive Geometry) - Eugenio Durand; The Geometry Center
    Generate Penrose tilings or design your own nonperiodic tilings of the plane with this interactive application. In the process, you can select and visualize plane cross-sections of a lattice in anywhere from 3 up to 13 dimensions. Geometry of Quasicrystals ...more>>

  37. QUdata.com - Icestone Trustee Limited
    Online tools and reference library resources for data mining and knowledge discovery. Collection of free online statistical and scientific calculators, 2D and 3D function plotters. ...more>>

  38. Quelques feuilles de Maple - Maple expliqué en français - Canonne
    An introduction to Maple in French. Algèbre Linéaire; Equations Différentielles; Equations et Inéquations; Fonctions; Géométrie; Graphiques; Polynômes et Fractions rationnelles; Programmation; Statistiques. ...more>>

  39. Query Interface to the Contents of the Mathematics Archives - University of Tennessee, Knoxville (UTK)
    Search software, abstracts and reviews; teaching materials, etc. by keyword. ...more>>

  40. QueryTree - D4 Software Ltd
    Drag and drop this free tool to explore, analyze, and visualize data — without special code, formulas, or even software: QueryTree queries tabular information within your web browser. ...more>>

  41. Qu'est-ce qu'un nombre? E-doc Mathématiques - Service du Film de Recherche Scientifique (SFRS)
    Site basé sur le livre de S. Houzel, qui retrace l'histoire du nombre depuis l'Antiquité. In French. Site based on the book by S. Houzel, retracing the history numbers. ...more>>

  42. The Quest for the Holy Value - Kjetil Valstadsve
    Finding the correct value of pi. The likelihood of any random two integers having 1 as their greatest common divisor (no factors in common), has been proved to be 6 divided by pi squared - the numbers are prime in relation to each other. According to ...more>>

  43. Questionnaire Design and Surveys Sampling - Prof. Hossein Arsham; University of Baltimore
    Course notes on basic statistical analyses of data from sample surveys, especially for marketing science. ...more>>

  44. Quick Trig Lessons - Matt Robinson
    Brief lessons on ratios, triangles, identities, graphs, and formulas, with practice problems and a page of links to other math sites on the web. ...more>>

  45. Quirky Video Poker - Ivars Peterson (MathTrek)
    The lure of easy money brings gullible bettors back again and again to the game of video poker - an immensely popular pastime in casinos and other gambling venues throughout the United States. Most players are bound to lose money, says Todd D. Mateer, ...more>>

  46. Quizma --> Matemática Cálculo Robótica - Harold Suárez Guzmán
    In Spanish: Clases y Orientación en Matemáticas Cálculo y Robótica. Fórmulas - Demostraciones - Ejercicios - Ejemplos - Cálculo Interactivo. Algebra, Logaritmos, Trigonometría, Geometría, Estadística, Ecuaciones, Problemas de Planteo, Funciones, Geometría ...more>>

  47. Quomodcocumque - Jordan Ellenberg
    Blog by a math professor at the University of Wisconsin, Madison. Posts, which date back to June, 2007, have spanned childrearing, the Baltimore Orioles, dining, overheard conversations, and included "Throwing the baby with a math Ph.D. out with the obnoxious ...more>>

  48. The Quotations Page - Michael & Laura Moncur
    A searchable collection of resources and information relating to quotations. Quotes of the Day; Quotes of the Week; Motivational Quotes of the Day; Random Quotes; Search; Links - a listing of other useful resources related to quotations. You are invited ...more>>

  49. Qwizdom
    Qwizdom's wireless handheld technologies and student response system let teachers instantly assess students' comprehension and identify their misconceptions and errors, in parallel, without having to facilitate multiple voices or single out "quiet" students. ...more>>

  50. Raccordo tangenziale tra superfici toriche - isawi
    In Italian: "Ricerca riguardante la messa appunto di un procedimento di costruzioni geometriche capace di determinare delle superfici inviluppanti tre quadriche di rotazioni assegnate ( sfere, ellissoidi, parabolidi o iperbolici). I risultati raggiunti ...more>>

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