# Mathematical Digest

### Short Summaries of Articles about Mathematics

in the Popular Press

"Playing by quantum rules," by Erica Klarreich. *Nature,* 15 November 2001.

"Game theory has been used to study problems from nuclear warfare to animalbehavior. Now physicists are extending it into the quantum realm, opening a newrange of potential applications," the article says. One application would beto devise an algorithm that would allow a quantum computer to factor numbersmuch more efficiently than a "classical" computer; another would createalgorithms---rephrase games---that would "compete" to find a particular entryin a database, for instance.

*--- Annette Emerson*