Louis Chen Hsiao Yun

Louis Chen Hsiao Yun (Chinese: 陈晓云; pinyin: Chen Xiaoyun) is Emeritus Professor at the National University of Singapore.

Chen earned his BSc (Honours) from University of Singapore in 1964 and completed his MSc as well as PhD at Stanford University in 1969 and 1971 respectively. In 1972, he joined the Mathematics Department of the then University of Singapore as a Lecturer. He was promoted to Senior Lecturer in 1977, Associate Professor in 1981 and Professor in 1989.

Chen held several administrative appointments at the National University of Singapore (NUS). At NUS's Faculty of Science, he was Head of the Department of Mathematics from July 1996 to June 2000 and Head of the Department of Statistics and Applied Probability from July 2002 to June 2004. He was also Director of NUS's Institute for Mathematical Sciences from July 2000 to December 2012. For his achievements in his field of study, he was appointed Tan Chin Tuan Centennial Professor from July 2006 to December 2012 and Distinguished Professor from January 2013 to June 2015.

Chen's research interests include the Stein-Chen method of Poisson approximation which deals with the probability of rare events. This method and technique is widely applied in many areas ranging from molecular biology to computer science.

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