Han, Chang Yong

Associate Professor

Department of Applied Mathematics

Kyung Hee University

1732 Deogyeong blvd

Yongin Gyeonggi 446-701

South Korea


Contact information

Rm 423, College of Applied Science bldg 

(P) +82-31-201-3814

(F) +82-31-202-2407




Course information (2014a)

Topology and its applications I

Calculus I

Linear Algebra





Seoul National University




Seoul National University




Seoul National University




Visiting scholar

Department of Mechanical and Aeronautical Engineering

University of California, Davis



Department of Mathematical Sciences

Seoul National University


Full-time instructor   

Department of Applied Mathematics

Kyung Hee University



Research interests

Computer aided geometric design

Geometric algorithms and scientific computing



  1. Inverse kinematics for optimal tool orientation control in 5-axis CNC machining (with R. T. Farouki and S. Li), Computer Aided Geometric Design 31, 13–26 (2014)
  2. Rotation-minimizing Euler-Rodrigues rigid-body motion interpolants (with R. T. Farouki, P. Dospra, and T. Sakkalis), Computer Aided Geometric Design 30, 653–671 (2013)
  3. Medial axis transform of a planar domain with infinite curvature boundary points (with S.-H. Kwon and H. I. Choi), Computer Aided Geometric Design 29, 281–295 (2012)
  4. Cubic helical splines with Frenet-frame continuity (with S.-H. Kwon), Computer Aided Geometric Design 28, 395–406 (2011)
  5. Geometric Hermite interpolation by monotone helical quintics, Computer Aided Geometric Design 27, 713–719 (2010)
  6. Computing the Minkowski value of the exponential function over a complex disk (with H. I. Choi, R. T. Farouki, and H. P. Moon), Lecture Notes in Computer Science 5081/2008, 1–21 (2008)
  7. Nonexistence of rational rotation-minimizing frames on cubic curves, Computer Aided Geometric Design 25, 298–304 (2008)
  8. Two-dimensional offsets and medial axis transform (with H. I. Choi, S. W. Choi, T.-W. Kim, S.-H. Kwon, H. P. Moon, K. H. Roh, and N.-S. Wee), Advances in Computational Mathematics 28, 171–199 (2008)
  9. Root neighborhoods, generalized lemniscates, and robust stability of dynamic systems (with R. T. Farouki), Applicable Algebra in Engineering, Communications and Computing 18, 169–189 (2007)
  10. Guaranteed consistency of surface intersections and trimmed surfaces using a coupled topology resolution and domain decomposition scheme (with J. Hass, R. T. Farouki, X. Song, and T. W. Sederberg), Advances in Computational Mathematics 27, 1–26 (2007)
  11. Algorithms of spatial Pythagorean-hodograph curves (with R. T. Farouki), Geometric Properties for Incomplete Data (R. Klette, R. Kozera, L. Noakes, and J. Weickert, eds.), Springer, 43–58 (2006)
  12. Boundary evaluation algorithms for Minkowski combinations of complex sets using topological analysis of implicit curves (with R. T. Farouki and J. Hass), Numerical Algorithms 40, 251–283 (2005)
  13. Solution of elementary equations in the Minkowski geometric algebra of complex sets (with R. T. Farouki), Advances in Computational Mathematics 22, 301–323 (2005)
  14. Robust plotting of generalized lemniscates (with R. T. Farouki), Applied Numerical Mathematics 51, 257–272 (2004)
  15. Computation of Minkowski values of polynomials over complex sets (with R. T. Farouki), Numerical Algorithms 36, 13–29 (2004)
  16. Topologically consistent trimmed surface approximations based on triangular patches (with R. T. Farouki, J. Hass, and T. W. Sederberg), Computer Aided Geometric Design 21, 459–478 (2004)
  17. Characterization and construction of helical polynomial space curves (with R. T. Farouki, C. Manni, and A. Sestini), Journal of Computational and Applied Mathematics 162, 365–392 (2004)
  18. Rational approximation schemes for rotation-minimizing frames on Pythagorean-hodograph curves (with R. T. Farouki), Computer Aided Geometric Design 20, 435–454 (2003)
  19. Euler–Rodrigues frames on spatial Pythagorean-hodograph curves (with H. I. Choi), Computer Aided Geometric Design 19, 603–620 (2002)
  20. The medial axis transform (with H. I. Choi), Handbook of Computer Aided Geometric Design (G. Farin, J. Hoschek, and M-S. Kim, eds.), North-Holland, 451–472 (2002)
  21. Medial axis transform distance and its application (with H. I. Choi and J-H.Yoon), Proceedings, The First Korea–UK Workshop on Geometric Modeling and Computer Graphics 2000, Seoul, KOREA, April 6–7, 2000, Kyung Moon Publishers, 65–69 (2000)
  22. Medial axis transform and offset curves by Minkowski Pythagorean hodograph curves (with H. I. Choi, H. P. Moon, K. H. Roh, and N-S. Wee), Computer-Aided Design 31, 59–72 (1999)