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Lee Cecil Fletcher Sallows (born April 30, 1944) is a British electronics engineer known for his contributions to recreational mathematics. He is particularly noted as the inventor of golygons, self-enumerating sentences, and geomagic squares. Sallows has an Erdős number of 2.〔(Coauthors of Paul Erdos ), see Richard K. Guy〕〔 ==Recreational mathematics== Sallows is an expert on the theory of magic squares〔(Magic Square Update-2009 ), September 6, 2009〕 and has invented several variations on them, including alphamagic squares〔(alphamagic square ), Encyclopedia of Science〕〔(excerpt from ''Word Play'' by Martin Gardner )〕 and geomagic squares.〔(''Magic squares are given a whole new dimension'' ), The Observer, April 3, 2011〕 The latter invention caught the attention of mathematician Peter Cameron who has said that he believes that "an even deeper structure may lie hidden beyond geomagic squares"〔(''Ancient puzzle gets new lease of 'geomagical' life'' ), New Scientist, January 24, 2011〕 In The Lost Theorem published in 1997 he showed that every 3 × 3 magic square is associated with a unique parallelogram on the complex plane, a discovery that had escaped all previous researchers from ancient times down to the present day.〔(''The lost theorem'' ) In The Mathematical Intelligencer, Fall 1997, Vol 19, Issue 4, pp 51-54〕 In 1982 Sallows came up with the idea of an autogram or self-enumerating sentence, in which the numbers of letters and (possibly) other typographical symbols employed are described by the sentence itself.〔Hofstadter, D.R. “Metamagical Themas” Scientific American, January 1982, pp 12–17〕 A golygon is a polygon containing only right angles, such that adjacent sides exhibit consecutive integer lengths. Golygons were invented and named by Sallows〔(''Serial isogons of 90 degrees'' ), by Lee Sallows, Martin Gardner, Richard Guy, and Donald Knuth, Mathematics Magazine, Vol. 64, No. 5, December, 1991〕 and introduced by A.K. Dewdney in the ''Computer Recreations'' column of the July 1990 issue of Scientific American. In 2012 Sallows invented and named self-tiling tile sets—a new generalization of rep-tiles.〔(''On Self-Tiling Tile Sets'' ), by Lee Sallows,, Mathematics Magazine, Vol. 85, No. 5, December 2012〕 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「Lee Sallows」の詳細全文を読む スポンサード リンク
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