Volume 31 • Number 2 • 2008   • A Characterization of Chen Surfaces in Ε4 Esen Iyigun, Kadri Arslan and Gunay Ozturk Abstract. In the present study, we calculate the coefficients of the second fundamental form and curvature ellipse of Chen surfaces in Ε4. Further, we give the necessary and sufficent condition for the origin of NpM to lie on the curvature ellipse of Vranceanu surfaces, which are special type of Chen surfaces. 2000 Mathematics Subject Classification: 53C40, 53C42. Full text: PDF