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PC Magazine
May 4, 2004
Gabrielle Gagnon |
Detecting Spam Bayesian filters use probability theory to determine if messages are legit. Will big numbers help stop the spam flood?   |
Science News
April 17, 2004
Ivars Peterson |
Anatomy of a Bead Creature Award-winning sci-fi author creates intricate creatures out of beads, artistically representing the hyperbolic plane. |
Science News
April 17, 2004 |
Functions on Display Website offers information about and visualizations of more than 87,000 formulas. |
Science News
April 10, 2004
Ivars Peterson |
From Number Puzzles to Automata Number puzzle leads to automata theory. |
Science News
April 3, 2004
Ivars Peterson |
Riding on Square Wheels Stan Wagon, a mathematician at Macalester College in St. Paul, Minn., has a bicycle with square wheels. It's a weird contraption, but he can ride it perfectly smoothly. His secret is the shape of the road over which the wheels roll. |
Science News
March 20, 2004
Ivars Peterson |
Deriving the Structure of Numbers The study of prime numbers has long been a central part of number theory, a field traditionally pursued for its own sake and for the mathematical beauty of its results. |
Science News
February 21, 2004
Ivars Peterson |
Computing on a Cellular Scale John Conway, a British mathemetician at Princeton University, has created a cellular game that is unpredictable. In studying the behavior of leaf pores, physicist David Peak, biologist Keith A. Mott, and their coworkers at Utah State University in Logan found that stomata activity resembles that of cellular automata able to perform specific computational tasks. |
Science News
February 14, 2004
Ivars Peterson |
Hunting e E has been called the logarithmic constant, Napier's number, Euler's constant, and the natural logarithmic base. This article describes how it can be calculated. |
Science News
February 7, 2004
Ivars Peterson |
Turning a Snowball Inside Out Turning a sphere inside out without allowing any sharp creases along the way is a tricky mathematical maneuver. Carving an intricate snow sculpture depicting a crucial step in this twisty transformation presents its own difficulties. |
Science News
January 31, 2004
Ivars Peterson |
Amicable Pairs, Divisors, and a New Record The Pythagoreans of ancient Greece were fascinated by whole numbers. One particular interest involved what we now call amicable numbers. |
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