Ki-hang Kim

Ki-Hang Kim (; 5 August 1936 – 15 January 2009), also known as Kim Ki-Hang Butler, Hang Kim, Keyhany Keem, or Kim Ki-Hang was a Korean-American Mathematician and Alabama State University professor known for his contributions in semigroups, Boolean matrices, and Social Sciences. He frequently co-wrote with Fred Roush.

Personal life Kim was born in Anju, Korea, Empire of Japan (now in North Korea) the eldest son of independent farmers Jin Gyong Kim and Mayhryn Hong. A bright child, by 12 years old Kim was capable of speaking some Japanese, Chinese, English and Russian, and had skipped some grades of school; by 14, he was acting as an interpreter for US troops in Korea during the Korean War. In 1950, Kim's region was held by the South Korean and American army. When the North Koreans and Chinese returned, Kim was given six hours to decide whether to take an empty U.S. Air Force seat, and go South with the US Army, which he accepted upon the urging of his father. He didn't see his family again for 30 years. He received US citizenship in 1960. In 1981, Kim returned to North Korea, reuniting with his family for the first time in 30 years. Kim was also active in the Korean-American community, acting as the first president of the Montgomery Korean-American Association and was a member of the Korean-American Methodist Church. He was also recognised in the 1972 edition of "Personalities of the South."

According to long-time collaborator Fred Roush, there was a period of time where Kim was a bodybuilder.

Kim began teaching at St. Mary's College in 1968, moving to Pembroke State University in 1971. Finally, he accepted the position of professor of mathematics and Director of the Mathematics Research Group at Alabama State University.

From 1971 to 1976, Kim published 25 papers on semigroups and Boolean matrices (under the name Kim Butler). In 1980, he launched and became editor of Mathematical Social Sciences, focusing on Game Theory and Social Choice Theory.

Additionally, Kim wrote seven books, reviews of which can be found here. They are titled as follows:

Lecture notes on (0,1)-matrices (1973) Mathematics for social scientists (1980) with F W Roush. Introduction to mathematical consensus theory (1980) with F W Roush. Boolean matrix theory and applications (1982) Applied abstract algebra (1983) with F W Roush. Competitive economics. Equilibrium and arbitration (1983) with F W Roush. Incline algebra and applications (1984) with Z Q Cao and F W Roush. Team theory (1987) with F W Roush