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  All Sites - 6833 items found, showing 6651 to 6700

  1. When Is Easter? - Jim Loy
    "Easter is my favorite holiday, because of the bizarre way in which its date is determined. When is Easter? Here is how you can answer that question..." (Easter is the next Sunday, after the Paschal Moon date.) ...more>>

  2. When mathematics has to be theater - Keith Devlin (Devlin's Angle)
    A mathematician's entry into the world of commercial multimedia - the creation of an interactive calculus textbook on CD-ROM. ...more>>

  3. When mathematics is plain sailing - Keith Devlin (Devlin's Angle)
    In the ocean waters off New Zealand, an intense mathematical olympiad has just begun: The America's Cup - a yacht race, the premier international event in ocean sailing. Competition is fierce. The technical challenges are enormous. And the costs are ...more>>

  4. When The Counting Gets Tough, The Tough Count On Mathematics - Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
    A discussion by William A. McWorter, Jr. of the application of the recursion formula for the Fibonacci sequence to counting and vector problems. ...more>>

  5. Where to Start? - Cut the Knot!, Alexander Bogomolny
    A discussion of math education: the intent of the NCTM Standards, reflections on the history of constructivism, classroom practices (with a link to Marilyn Burns' Math Solutions page), and a simple applet for solving linear equations. An interactive column ...more>>

  6. Where Will the New Millennium Begin? (Math Chat) - Frank Morgan; Christian Science Monitor
    Assuming the third millennium arrives on January 1, 2001, where on Earth should the celebration begin? ...more>>

  7. Which Countries Are Most Like Stars? (Math Chat) - Frank Morgan, MAA Online
    Which countries in the world have a point such that the shortest line from every other point in the country stays inside the country? (ignore mountains and valleys). Mathematicians call such countries starlike. Are there any countries such that the shortest ...more>>

  8. Which One Is Older? (Math Chat) - Frank Morgan, MAA Online
    Creative solutions to the challenge: how can two people determine which is older without revealing their ages? Math videos available from the Mathematical Sciences Research Institute via the MAA. "Mathematics in Arcadia," "Fermat's Last Theorem," as seen ...more>>

  9. Which Polygon Sides are Parallel? - NASA Lewis Learning Technologies Project
    Which of these line segments are parallel? Two adjacent sides of a triangle; Two adjacent sides of a pentagon; Two opposite sides of a rectangle; Two radii of a circle. A diagram and a detailed answer are provided. From NASA's 9th Grade Math Proficiency ...more>>

  10. Which Problem Equals 25 Percent? - NASA Lewis Learning Technologies Project
    Which problem has an answer of 25 percent? 1) 10 is what percent of 50? 2) 25 is what percent of 75? 3) 25 is what percent of 125? 4) 20 is what percent of 80? A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test. ...more>>

  11. Whips and Dinosaur Tails - Ivars Peterson (MathTrek)
    The loud crack of a deftly flicked bullwhip is a small sonic boom, generated when the whip’s thin, highly flexible tip exceeds the speed of sound. Sauropod dinosaurs of the family Diplodocidae have enormous tails that gradually narrow to thin, delicate ...more>>

  12. Whistler Alley Mathematics - Paul Kunkel
    Kunkel's Geometer's Sketchpad lessons convey a conceptual understanding, usually without rigorous proof, with questions and suggestions for extensions: Buffon's Needle (an old probability exercise); Chinese Handcuffs (questions with applications for geometry, ...more>>

  13. White Narcissus - Ivars Peterson (MathTrek)
    The elegant, swooping forms carved out of wood by sculptor Robert Longhurst often resemble gracefully curved soap films that span twisted loops of wire dipped into soapy water. Alhough these abstract sculptures bear an uncanny resemblance to mathematical ...more>>

  14. Wholemovement - Bradford Hansen-Smith
    Bradford Hansen-Smith presents the art and geometry of folding circles. As he explains, "Everything we know about geometry, mathematics, and all spatial arrangement and organization of matter is demonstrated by cutting into the wholeness of the sphere. ...more>>

  15. Who Likes Homework
    Tutors and homework helpers in math, chemistry, physics and more. ...more>>

  16. Who's Counting - John Allen Paulos
    Columns by Prof. John Allen Paulos, the author of Innumeracy, Mathematician Reads a Newspaper, and other popular books. Humorous and enjoyable articles by a keen observer of the world around him whose mind has been sharpened by mathematical practice. ...more>>

  17. Who's Really Ahead? - Ivars Peterson (MathTrek)
    The winding down of the current baseball season seems an appropriate time to take a look at a curious inconsistency that sometimes appears in team standings... Once in a while the team with the higher winning percentage may be at least one-half a game ...more>>

  18. Who's Really No. 1? - Ivars Peterson (MathTrek)
    It happens every fall. Fierce arguments erupt over which U.S. college football team is the best in the nation. As the season progresses, this frenzy of head scratching and navel gazing mounts until the climactic bowl games at the end of the year (more ...more>>

  19. Who Wants to Be a Mathematician - American Mathematical Society
    In the game show "Who Wants to Be a Mathematician," high school students compete for cash and prizes by answering multiple choice mathematics questions. Read about past performances of the game; view videos of games played in Danvers, MA, at Danvers High ...more>>

  20. Who Wants to be a Millionaire? (Math Chat) - Frank Morgan, MAA Online
    Answering the challenge: On ABC TV's "Who Wants to be a Millionaire," to maximize your expected winnings how sure should you be of your answer to the $500,000 question to answer? Somewhere from about 22.5% to about 46.5%, probably closer to the latter. ...more>>

  21. Who was Marin Mersenne? - Luther Welsh
    It was not until the mid 20th century that Mersenne became known primarily for his Prime Number Conjecture. Historically, he was much better known for his correspondence with leading scientists of the day. Interested in optics, he also been called the ...more>>

  22. Why 2001 Won't Be 2001 - Keith Devlin (Devlin's Angle)
    "It's a good story... But how realistic is the behavior of HAL? We don't yet have computers capable of genuinely independent thought, nor do we have computers we can converse with using ordinary language. True, there have been admirable advances in systems ...more>>

  23. Why Does Back-to-School Imply Back to Math? - Keith Devlin (Devlin's Angle)
    ...in a world where everyone can afford a pocket calculator and a great many people seem to be successful in life with little or no mathematical ability or knowledge of science, why do we place so much emphasis on math and science? Whatever the answer, ...more>>

  24. Why Do Math? - The Society for Industrial and Applied Mathematics (SIAM)
    A showcase for exciting mathematical and computational science topics at an introductory collegiate level. Short popular science articles that illustrate the innovative uses of math in yachting, cochlear implants, neuroscience, space travel, tomography, ...more>>

  25. The Why Files - University of Wisconsin
    An electronic exploration of the issues of science, math, and technology that lurk behind the headlines of the day, presenting those topics in a clear, entertaining and accessible manner. Provides a bimonthly feature on the science of everyday life, archived ...more>>

  26. Why Isn't There a Nobel Prize in Mathematics? - Peter Ross
    Ross writes that Garding and Hormander state, "The true answer to the question (of the title) is that, for natural reasons, the thought of a prize in mathematics never entered Nobel's mind." Nobel's final will of 1895 bequeathed $9,000,000 for a foundation ...more>>

  27. Why is the Area of a Circle Pi*r^2? - Eva Thury
    An explanation of the formula for the area of a circle, based on "slicing" and rearranging the circle. ...more>>

  28. Why is the Mathematician So Messy? (Math Chat) - Frank Morgan, MAA Online
    A physicist and a mathematician can clean a house in 6 hours; an engineer and the mathematician in 3 hours; and the physicist and the engineer in 1 hour and 12 minutes. How long would it take the physicist alone? ...more>>

  29. Why is the Product of Negative Numbers Positive? (Question Corner and Discussion Area) - University of Toronto Mathematics Network
    A short essay and a description of a practical demonstration. ...more>>

  30. Why It Is Important to Learn Algebra - EdSource
    This PDF document is a parent/student guide explaining why Algebra I is a required subject, how it helps prepare students for the future, how Algebra I fits into the student's high school math program, and what parents can do to support their student's ...more>>

  31. Why It's Hard to Fold a Triangle in Half (Math Chat) - Frank Morgan, MAA Online
    For a circular piece of paper, the lines along which you can fold it "in half" (with half the area on each side) are precisely the lines through the center. What other shapes work the same way? This works for lots of shapes, such as rectangles, parallelograms, ...more>>

  32. Why major in Mathematics? - Department of Mathematics, University of Georgia
    Seven reasons to pursue, or applications of, the major in mathematics: because you like it, because professional schools realize it develops analytical skills and the ability to work in a problem solving environment, because employers highly value those ...more>>

  33. Why Not Geometry? - Cut the Knot!, Alexander Bogomolny
    An exploration of the validity of teaching algebra at the middle-school level, testing, mathematics ewducation reform, the goal of education, and a suggestion that geometry might be a more important starting point. ...more>>

  34. Why Study Math? How to Study Math - Math Forum, Ask Dr. Math FAQ
    Why do we need to learn math? When are we ever going to use it in real life? Math study tips. ...more>>

  35. Why Teach Mathematics? - Harold Brochmann
    A series of articles addressing the questions Why do we have to learn this stuff? Why do we teach mathematics? Is the mathematics we teach relevant? Why is teaching mathematics so difficult? ...more>>

  36. Width, Diameter, and Geometric Inequalities (The Geometry Junkyard) - David Eppstein, Theory Group, ICS, UC Irvine
    An extensive annotated list of links to material on width, diameter, and geometric inequalities. ...more>>

  37. Wikipedia Mathematics
    The free encyclopedia's entries on mathematics. A wiki is a collection of interlinked web pages, any of which can be visited and edited by anyone at any time. Many pages also available in a range of foreign languages. ...more>>

  38. Wild About Math! - Sol Lederman
    Math posts, which date back to October, 2007, have included "10 ways to get wild about Math," "How to square large numbers quickly (part 1)," "26 tips for using learning styles to help your kids with Math," "The algebra of cross-multiplication," "Flexagon ...more>>

  39. Wildlife Trade: Buyer Beware - Shelly Peretz, Thornridge High School, Dolton, IL
    Collecting and analyzing consumer values, attitudes, and beliefs regarding wildlife trade and endangered species: a project that demonstrates the feasibility of integrating learning strategies, math, social studies and science within a traditional high ...more>>

  40. William Lowell Putnam Mathematical Competition - The Mathematical Association of America (MAA)
    The examination tests originality as well as technical competence. Questions cut across the bounds of various disciplines, and self-contained questions that do not fit into any of the usual categories may be included. Announcement of winners, description ...more>>

  41. Will it rot my students' brains if they use Mathematica? - Theodore W. Gray and Jerry Glynn
    Excerpts from the introduction to The Beginner's Guide to Mathematica V4. Jerry: "I have young students who reach for their calculators to get the answer to 5×6. My response, when I see that, is to explain that such behavior is socially unacceptable, ...more>>

  42. Will the real continuous function please stand up? - Keith Devlin (Devlin's Angle)
    A description and a more rigorous Cauchy-Weierstrass definition that "forms the bedrock of modern real analysis and any standard 'rigorous' treatment of calculus," with a discussion of how the formal definition involves a major shift in conceptual model ...more>>

  43. Wilson A. 'Snowflake' Bentley (1865-1931) - Tobias C. Brown
    An American farmer who spent most of his life producing photomicrographs of snowflakes at his Jericho, Vermont farm. The site includes a Snow Crystal Display with a sequence of 26 images. ...more>>

  44. Wilson Stothers' Geometry Pages - Wilson Stothers, University of Glasgow
    A guide to the various geometry topics on Stothers' pages, including Euclidean, affine, projective, inversive, and hyperbolic geometries, and the Klein View of geometry. These pages began as an experiment in teaching projective conics using Cabri to provide ...more>>

  45. WIMS (WWW Interactive Mathematics Server) - Université de Nice - Sophia Antipolis
    Interactive mathematical applications, also available in French, with documentation. The server's exercises and programs are designed to find a polynomial with given values; find the Taylor expansion of a function; find a polynomial from its curve; given ...more>>

  46. WINDandSEA - The Oceanic and Atmospheric Sciences Internet Locator - The NOAA Central Library
    An atmospheric and oceanic sciences Internet Resource Locator with over 800 selected links to science and policy sites organized by topic and alphabetically within topic. Current interest topics (Year of the Ocean; El Nino)a teacher's corner with teaching-related ...more>>

  47. window into a math classroom - Sadie Estrella
    A snapshot-driven blog subtitled "a glimpse into a math classroom once a day." Estrella's posts, enlivened with pictures of her students and of their work on classroom dry-erase whiteboards, have included "Trying Math Meta-Cognition," "More Arguing about ...more>>

  48. WinFiles.com Windows Shareware Collection - CNET, Inc.
    A searchable virtual shareware library. Newest shareware, and shareware classified and sorted by platform on "categories" pages - for details, see the Readme file. Includes calculators, mathematical graphing tools, unit converters, educational games and ...more>>

  49. WINKS & KWIKSTAT Statistics Software - TexaSoft
    Statistical data analysis software for Windows (WINKS) and DOS (KWIKSTAT). Programs in zipped format to download; free evaluation copy of any program you are interested in seeing. Courses on Statistical Data Analysis and QS-9000 Statistical Techniques ...more>>

  50. A Winning Division - Ivars Peterson (MathTrek)
    A farmer plans to divide a triangular piece of land evenly between his son and daughter. Because he wants to be scrupulously fair, he would like the two pieces to have not only equal areas but also equal perimeters. Where should he draw the line? This ...more>>


 
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