Education and Research
2013- Yonsei University: Professor
2008-2012 Yonsei University: Associate Professor
2002-2008 Chung-Ang University: Assistant Professor, Associate Professor
2001-2002 University of Missouri at Columbia: Post Doctoral Fellow
2000-2001 KIAS at Seoul: Research Fellow
1993-1998 Math Department of University of Wisconsin at Madison: Ph. D. Degree (Major: Harmonic Analysis, Advisor: Andreas Seeger)
Multiple-Hilbert transforms associated with polynomials. Memoir of AMS 237 (2015), no 1119, 1-124.
[10] Maximal average along variable lines. Israel J. Math. 167 (2008), 1-13.
Papers [2000-2007]
[1] Weak type estimates for cone type multipliers associated with a convex polygon. Indiana Univ. Math. J. 56 (2007), 1827-1869. (with Hong. Sunggeum, Yang. Chan Woo)
[2] Sharp L^2 bound of maximal Hilbert transforms over arbitrary sets of directions. J. Math. Anal. Appl. 335 (2007), 56-63.
[3] Riesz means associated with convex polygons in R^2 J. Math. Anal. Appl. 331 (2007), 377-395. (with Hong. Sunggeum, Yang. Chan Woo)
[4] Atomic decomposition on Hardy-Sobolev spaces. Studia Math. 177 (2006), 25-42. (with Cho, Yong-Kum)
[5] Singular Radon transforms along odd curves on the Heisenberg group. J. Geom. Anal. 15 (2005), 669-684.
[6] Fractional integral along homogeneous curves in the Heisenberg group. J. Korean Math. Soc. 42 (2005), 499-516.
[7] Lacunary directional maximal function on the Heisenberg group. Math. Res. Lett. 11 (2004), 599-613.
[8] L^P estimates for singular integrals and maximal operators associated with flat curves on the Heisenberg group. Duke Math. J. 114 (2002), 555-593.
[9] Hilbert transforms along curves in the Heisenberg group. Proc. London Math. Soc. (3) 80 (2000), 611-642.