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Alan Jerome Hoffman (born May 30, 1924) is an American mathematician and IBM Fellow emeritus, T. J. Watson Research Center, IBM, in Yorktown Heights, New York. He is the founding editor of the journal ''Linear Algebra and its Applications'', and holds several patents. He has contributed a great deal to combinatorial optimization and the eigenvalue theory of graphs. Hoffman and Robert Singleton constructed the Hoffman–Singleton graph, which is the unique Moore graph of degree 7 and diameter 2. 〔A.E. Brouwer & J.H. van Lint, Strongly regular graphs and partial geometries, in: Enumeration and Design - Proc. Silver Jubilee Conf. on Combinatorics, Waterloo, 1982, D.M. Jackson & S.A. Vanstone (eds.) Academic Press, Toronto (1984) 108.〕 ==Awards== Alan Hoffman is a recipient of many awards. 〔(【引用サイトリンク】url=http://www.research.ibm.com/people/a/ajh/#publications )〕 * IBM Fellow, 1978– * Member, National Academy of Sciences, 1982– * Fellow, American Academy of Arts and Sciences, 1987– * D. Sc. (Hon.) Technion – Israel Institute of Technology, 1986 * 1992 John von Neumann Theory Prize with Philip Wolfe 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Alan J. Hoffman」の詳細全文を読む スポンサード リンク
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