• Bour s theorem on gauss map in 3 euclidean space 

      Güler, Erhan; Yaylı, Yusuf; Hacısalihoğlu, Hasan Hilmi (Hacettepe Üniversitesi, 2010)
      In this paper some relations are established between the Laplace-Beltrami operator and the curvatures of helicoidal surfaces in 3-Euclidean space. In addition, Bour’s theorem on the Gauss map, andsome special examples are given.
    • Generalized bour s theorem 

      Güler, Erhan; Yaylı, Yusuf (Kuwait Journal of Science, 2015)
      We give the classical isometric minimal helicoidal and rotational surfaces using generalized Bour’s theorem in Euclidean 3-space. Furthermore, we investigate the minimality and have same Gauss map of the surfaces.
    • III laplace beltrami and (S,L)-type rotational surface 

      Güler, Erhan (Longdom Publishing SL, 2012)
      We study on the third Laplace-Beltrami operator of timelike rotational surface of (S,L)-type in three dimensional Minkowski space.
    • Timelike rotational surfaces with lightlike profile curve 

      Güler, Erhan; Hacısalihoğlu, Hasan Hilmi (2011)