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- <text id=90TT0209>
- <title>
- Jan. 22, 1990: Big Deal
- </title>
- <history>
- TIME--The Weekly Newsmagazine--1990
- Jan. 22, 1990 A Murder In Boston
- </history>
- <article>
- <source>Time Magazine</source>
- <hdr>
- PEOPLE, Page 62
- Big Deal
- </hdr>
- <body>
- <p>By Emily Mitchell/Reported by Wendy Cole
- </p>
- <p> How many shuffles will thoroughly mix a deck of cards? The
- world wasn't exactly waiting for an answer, but Columbia
- University mathematician Dave Bayer wanted one anyway. He and
- Harvard mathematician Persi Diaconis observed thousands of
- shuffles and used several computers. After analyzing a deck's
- possible permutations (1068), they found the magic number:
- exactly seven shuffles ensure true randomness. A veteran poker
- hand, Bayer, 34, won't use his knowledge at the gaming table
- because "my job is to explain the problem. Others can try to
- take advantage of it."
- </p>
-
- </body>
- </article>
- </text>
-
-