Biography
Prof. Ki-Suk Lee
Prof. Ki-Suk Lee
Korea National University of Education, Republic of Korea
Title: Galois Polynomials
Abstract: 
Let n be a positive integer, and Z_n* be the multiplicative group modular n. We associate for each subgroup H of Z_n* with a polynomial Jn,H (x), which is called the Galois Polynomial. It tuns out that Jn,H(x) is a polynomial with integer coefficients for any n and H. If H is just the trivival subgroup {1}, Jn,H(x) is simply the Cyclotomic Polynomial. An equivalent condition is studied for a subgroup H to provide the Galois Polynomial Jn,H (x) is irreducible over Q.
Biography: 
1973 - 1976  : Kyung-gi  High school
1976 - 1980  : Seoul National University   (International Economics)  BS
1984 - 1987  : Dae-Woo Corporation Ltd.
1987 - 1989  : Seoul National University   (Mathematics)  BS
1989 - 1991  : University of Wisconsin - Madison  (Mathematics ) Master
1991 - 1995  : University of Wisconsin - Madison  (Mathematics ) Ph. D.
1995 - present  :  Korea National University of Education,  Professor
                         Department of Mathematics Education