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Science News
May 6, 2006
Ivars Peterson |
Quilting Pi The intriguing, enigmatic number pi, the ratio of a circle's circumference to its diameter, conjures up vivid patterns that artist and mathematician John Sims translates to quilts.   |
Science News
November 15, 2003
Ivars Peterson |
Cool Rationals One of my more distinct recollections of math class involves the decimal representation of rational numbers and the discovery of wonderful patterns among those digits. A new paper finds fascinating new patterns and provides some numerological explanations. |
Science News
November 3, 2001
Ivars Peterson |
Absolutely Abnormal Identifying the normal (or even the abnormal) in mathematics can pose serious difficulties... |
Science News
June 3, 2000
Ivars Peterson |
Sliding Pi Artist Arlene Stamp creates public mosaic art using the digits of pi. |
Science News
May 21, 2005
Ivars Peterson |
Divisibility by Seven Over the years, people have come up with dozens of algorithms for divisibility by 7. Here is the latest entry that is fast and efficient for determining if large numbers are divisible by 7. |
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
March 4, 2006
Ivars Peterson |
The Limits of Mathematics No matter what the system of axioms or rules is, there will always be some assertion that can be neither proved nor invalidated within the system. |
Science News
October 9, 2004
Ivars Peterson |
Randomness, Risk, and Financial Markets Approximate entropy, a novel measure used to determine the irregularity of a sequence of numbers, can be applied to stock market performance... Puzzle of the Week... |
PC Magazine
October 19, 2004
Neil J. Rubenking |
Excel Fails to Store Credit Card Numbers When entering numeric data over 15 digits long, prefix the data with a single quote ('). This forces Excel to treat the data as text. |
Science News
October 1, 2005
Ivars Peterson |
Numbers of No Escape Why do such mathemagical black holes occur? In general, processes that turn large inputs into significantly smaller outputs can quickly reduce even an infinite universe of starting points to a manageable, finite set of cases. |
PC Magazine
September 2, 2003
Neil J. Rubenking |
Windows XP Changes Filename Sorting Win XP's new and dramatically different file-sorting algorithm can wreak havoc on some legacy programs. |
Science News
January 4, 2003
Ivars Peterson |
Sound-Byte Math Music Swedish composer Daniel Cummerow has created mathematical sound bytes belonging to a category known as algorithmic music. Each musical fragment is determined by a mathematical recipe -- a formula that links digits with musical notes and their duration... |
Science News
January 14, 2006
Ivars Peterson |
Team Mersenne A Central Missouri State University computer identified the 43rd Mersenne prime, setting the record for the largest known prime number. This behemoth, 2 30402457 - 1, runs to a whopping 9,152,052 decimal digits. |
Science News
July 29, 2006
Ivars Peterson |
Names for Numbers Recreational mathematics offers a vast playing field for amateur and professional mathematicians alike. Named numbers, such as Smiths, have all sorts of intriguing properties. |
Science News
October 16, 2004 |
A Catalog of Random Bits A computer scientist and collaborators have identified a variety of flaws in computer-based random number generators, invented more robust versions of existing generators, and developed a suite of rigorous tests to check for randomness... Puzzle of the Week... |
Science News
November 4, 2006
Ivars Peterson |
Designer Decimals Fractions can yield amazingly familiar decimal expansions. |
Science News
April 10, 2004
Ivars Peterson |
From Number Puzzles to Automata Number puzzle leads to automata theory. |
Science News
June 29, 2002
Ivars Peterson |
Dangerous Problems Some mathematical problems are easy to describe but turn out to be notoriously difficult to solve. Nonetheless, despite repeated warnings from those who have failed in the past, these unsolved problems continue to lure mathematicians into hours, days, and even years of futile labor. |
Science News
May 13, 2000 |
Buffon's Needling Ants The classic probability experiment known as Buffon's needle produces a statistical estimate of the value of pi, the ratio of a circle's circumference to its diameter.... |
Managed Care
November 2000 |
Expect Premium Hikes To Top 10 Percent in '01 Health plan premium increases are again cracking double digits, according to two important gauges of benefit costs... |
Fast Company
December 1, 2006
Alyssa Danigelis |
Publishing's New Math: 14 > 13 Will the publishing industry finally get its data in sync with the rest of the world? |
Chemistry World
March 24, 2006
Jon Evans |
Organic Chemists Develop Molecular Calculator Electronic calculators may have decreased in size dramatically over the past 30 years, but a team of organic chemists has now shrunk the calculator to the size of a single molecule. |
Science News
September 24, 2005 |
Math Music An interactive Web site, developed at Eastern Washington University, provides variety of tools for composing music based on mathematical recipes that convert sequences of numbers -- such as pi, or Fibonacci numbers -- into sounds. |
