• Cheng–yau operator and gauss map of rotational hypersurfaces in 4-space 

      Güler, Erhan; Turgay, Nurettin Cenk (Springer, 2019)
      We consider rotational hypersurface in the four-dimensional Euclidean space E4. We study the Gauss map G of rotational hypersurface in E4 with respect to the so-called Cheng–Yau operator L1 acting on the functions defined ...
    • Fundamental form IV and curvature formulas of the hypersphere 

      Güler, Erhan (2020-11-26)
      We study curvature formulas and the fourth fundamental form IV of hypersurfaces in the four dimensional Euclidean geometry E4. We calculate fourth fundamental form and curvatures for hypersurfaces, and also for hypersphere. ...