Yutaka Nishiyama  

Native name  西山豊 
Born  21 October 1948 
Nationality  Japanese 
Occupation  University academic, author 
Known for  Mathematical study of Boomerangs 
Academic background  
Education  Kyoto University 
Academic work  
Discipline  Applied mathematics 
Institutions  Osaka University of Economics 
Notes  
Infobox contains data translated from Japanese Wikipedia

Yutaka Nishiyama (西山 豊 Nishiyama Yutaka, born 21 October 1948) is a Japanese mathematician and professor at the Osaka University of Economics, where he teaches mathematics and information. He is known as the "boomerang professor".^{[1]} He has written nine books about the mathematics in daily life.^{[2]} The most recent one, The mystery of five in nature, investigates, amongst other things, why many flowers have five petals.
Biography
 19671971: Faculty of Mathematics, Department of Science, Kyoto University
 19711985: IBM Japan as a Systems Engineer
 1985: Lecturer of Information Mathematics at Osaka University of Economics
 1995–present: Professor at Osaka University of Economics
 20052006: Visiting fellow at University of Cambridge, UK, joined for MMP.^{[3]}
Books
 50 Visions of Mathematics, Oxford University Press, May 2014, ISBN 9780198701811
 The Mysterious Number 6174: One of 30 Mathematical Topics in Daily Life, Gendai Sugakusha, July 2013, ISBN 9784768761748
Papers
 General Solution for Multiple Foldings of Hexaflexagons IJPAM, Vol. 58, No. 1, (2010). 113124. "19 faces of Flexagons"
 Fixed Points in Similarity Transformations IJPAM, Vol. 56, No. 3, (2009). 429438.
Articles for Plus Magazine
 A bright idea, Plus Magazine, issue 36, University of Cambridge, September 2005.
 Mysterious Number 6174, Plus Magazine, issue 38, University of Cambridge, March 2006.
 Winning Odds, with Steve Humble, Plus Magazine, issue 55, University of Cambridge, June 2010.
 Having fun with unit fractions, Plus Magazine, University of Cambridge, Feb 2012.
 Circles rolling on circles, Plus Magazine, University of Cambridge, May 2014.
References
 ^ Boomerang International Project 2007, Instructions of Paper Boomerangs in 70 Languages.
 ^ Mathematics in Daily Life
 ^ Millennium Mathematics Project