# Cheon Seoung Ryoo

Dr. Cheon Seoung Ryoo is a professor of mathematics at Hannam University. He received his Ph.D. in mathematics from Kyushu University. Dr. Ryoo is the author of several research articles on numerical computations with guaranteed accuracy. Also, he has contributed to the field of scientific computing, p-adic functional analysis, and analytic number theory. More recently, he has been working with quantum calculus, special functions, differential equations, and dynamical systems.