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"Quadramagicology," by Dana Mackenzie. New Scientist, 20/27 December 2003, pages 50-53.
This article discusses magic squares, which are square arrays of numbers in which the rows, columns, and diagonals add up to the same number. Although magic squares have been looke upon as fun puzzles rather than real mathematics, Mackenzie says that this has now changed. "[M]athematicians have begun a systematic exploration of the rich vein of magic squares that lies beneath those found by amateurs," he writes. "Using powerful tools from algebra and geometry, they can now predict exactly how many magic squares of a given type are out there."
--- Allyn Jackson
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