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Science News
December 14, 2002
Ivars Peterson |
A Trillion Pieces of Pi Computer scientist Yasumasa Kanada and his coworkers at the University of Tokyo Information Technology Center have now succeeded in computing 1,241,100,000,000 decimal digits of pi, smashing their own previous world record of 206,158,430,000 digits, set in 1999.   |
Science News
November 4, 2006
Ivars Peterson |
Designer Decimals Fractions can yield amazingly familiar decimal expansions. |
Science News
November 3, 2001
Ivars Peterson |
Absolutely Abnormal Identifying the normal (or even the abnormal) in mathematics can pose serious difficulties... |
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
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
April 10, 2004
Ivars Peterson |
From Number Puzzles to Automata Number puzzle leads to automata theory. |
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
June 3, 2000
Ivars Peterson |
Sliding Pi Artist Arlene Stamp creates public mosaic art using the digits of pi. |
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. |
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. |
Home Toys
December 2002
Phil Kingery |
Different Ways of Counting A fairly detailed look at the X-10 Extended Code data set used by home automation products |
Science News
January 11, 2003
Ivars Peterson |
A Remarkable Dearth of Primes The pursuit of prime numbers -- integers evenly divisible only by themselves and 1 -- can lead to all sorts of curious results and unexpected patterns. In some instances, you may even encounter a mysterious absence of primes. |
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. |
PC Magazine
October 14, 2003
M. David Stone |
Tabs in Word Tables Here's a quick and easy way to line up decimals and format columns in your Word tables. |
PC Magazine
May 4, 2004
Neil J. Rubenking |
Color Codes in Access Here's how to specify the shades of the rainbow in Access. |
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... |
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
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
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... |
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. |
