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Journal Article

Mini-Sudokus and Groups

Carlos Arcos, Gary Brookfield and Mike Krebs
Mathematics Magazine
Vol. 83, No. 2 (April 2010), pp. 111-122
DOI: 10.4169/002557010x482871
Stable URL:
Page Count: 12

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Topics: Sudoku
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Mini-Sudokus and Groups
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SummaryUsing a little group theory and ideas about equivalence relations, this article shows that there are only two essentially different 4 by 4 Sudoku grids. This can be compared with the 5,472,730,538 essentially different 9 by 9 Sudoku grids found by Jarvis and Russell with the aid of a computer algebra system.

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