Yun Sung Choi

Choi Yun Sung (; born 1958) is an emeritus professor in the Department of Mathematics at Pohang University of Science and Technology. He became president of the National Institute for Mathematical Sciences in 2025.

Education Choi graduated from Kyungnam High School in 1976. Majoring in mathematics, he completed his undergrad at Seoul National University. With Leopoldo Nachbin as his academic advisor, Choi focused on functional analysis, receiving a M.A. and Ph.D. from the University of Rochester in 1984 and 1986, respectively.

Career After completing his doctorate, he taught at Pusan National University for two years before going to Pohang University of Science and Technology (POSTECH) where he taught for at least 35 years. In additional to his role as professor, he was also head of the Department of Mathematics and director of the POSTECH Mathematics Institute. He has organized and held the ILJU School of Mathematics-Banach Spaces and Related Topics annually since 2009.

Choi has been a chief editor of the Journal of Korean Mathematical Society and an editor of Communications of the Korean Mathematical Society.

In 2025, Choi became president of National Institute for Mathematical Sciences.

Awards and honors 2023: Education Award, Korean Mathematical Society 2015: Academic Award, Korean Mathematical Society

Selected publications