Numbers

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equations for circuitry of electronic combination lock

Claude Shannon, born 100 years ago, devised the mathematical representation of information that made the digital era possible. Shown above are the equations he developed to mathematically describe how the circuitry in an electronic combination lock functions.

monarchs

A new mathematical model attempts to map the monarch butterfly (Danaus plexippus) navigation system. 

prime numbers

PRIME TIME  Prime numbers are loathe to repeat the final digit of the prime that precedes them, a bias that has mathematicians scratching their heads.

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