• Astrohelicoidal hypersurfaces in 4-space 

      Güler, Erhan; Kişi, Ömer (International Conference on Mathematics and Mathematics Education, 2019)
      We consider an astrohelicoidal hypersurface which its profile curve has astroid curve in the four dimensional Euclidean space E4. We also calculate Gaussian curvature and the mean curvature, and Weingarten relation of the ...
    • Astrohelicoidal surfaces 

      Güler, Erhan; Kişi, Ömer (International Conference on Mathematics and Mathematics Education, 2019)
      We construct an astrohelicoidal surface which its profile curve has astroid curve in the three dimensional Euclidean space E3. We also find Gaussian curvature and the mean curvature, and Weingarten relation of the surface ...
    • Cardiohelicoidal surfaces 

      Güler, Erhan (2019-09-06)
      Geometers have been working the curve theory and the surface theory for hundreds of years. We see good works for the theories in the literature. In this work, we introduce cardiohelicoidal surface in the three dimensional ...
    • Deltohelicoidal surfaces 

      Güler, Erhan (2019-09-06)
      The surface theory has been working by many mathematicians, and also geometers for hundreds of years. We meet nice papers and books for the theory in the literature. In this paper, we consider deltohelicoidal surface in ...
    • The gauss map and the third laplace-beltrami operator of the rotational hypersurface in 4-space 

      Güler, Erhan; Hacısalihoğlu, Hasan Hilmi; Kim, Young Ho (2018)
      We study and examine the rotational hypersurface and its Gauss map in Euclidean four-space E4 . We calculate the Gauss map, the mean curvature and the Gaussian curvature of the rotational hypersurface and obtain some ...
    • 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.
    • Helical hypersurfaces in minkowski geometry E^1_4 

      Güler, Erhan (Symmetry- Basel-MDPI, 2020-07-23)
      We define helical (i.e., helicoidal) hypersurfaces depending on the axis of rotation in Minkowski four-space E41 . There are three types of helicoidal hypersurfaces. We derive equations for the curvatures (i.e., Gaussian ...
    • Helicoidal hypersurfaces in the four dimensional minkowski space 

      Güler, Erhan; Kaimakamis, George; Magid, Martin (Manisa Celal Bayar University, 2018)
      Helicoidal hypersurfaces in the four dimensional Minkowski space are defined. There are three types, depending on the axis of rotation. Equations for the Gaussian and mean curvature are derived and many ...
    • Helicoidal surface of logaritmic spiral type in 3-space 

      Güler, Erhan; Kişi, Ömer (International Conference on Computational Mathematics and Engineering Sciences, 2019)
      In this paper, we study the logaritmic spiral-type helicoidal surface in Euclidean 3-space. We obtain logaritmic spiral-type helicoidal surface with some figures, and calculate its curvatures.
    • Isometric deformation of (m, n)-type helicoidal surface in the three dimensional euclidean space 

      Güler, Erhan (2018)
      We consider a new kind of helicoidal surface for natural numbers (m, n) in the three-dimensional Euclidean space. We study a helicoidal surface of value (m, n), which is locally isometric to a rotational surface of value ...
    • Laplace Beltrami operator of a helicoidal hypersurface in four space 

      Güler, Erhan; Magid, Martin; Yaylı, Yusuf (2016)
    • A new kind of helicoidal surface of value m 

      Güler, Erhan (2014)
      We define a new kind of helicoidal surface of value m. A rotational surface which is isometric to the helicoidal surface of value m is revealed. In addition, we calculate some differential geometric properties of the ...
    • On the gauss map of the rotational 3-surface in 4-space 

      Güler, Erhan; Hacısalihoğlu, Hasan Hilmi (Amasya Üniversitesi, 2017)
      We consider the Gauss map of the rotational hypersurface in the four dimensional Euclidean space. We define the mean curvature and the Gaussian curvature formulas. We also find some geometric ...
    • One sided Henry Smith surface 

      Güler, Erhan; Kişi, Ömer (International Conference on Computational Mathematics and Engineering Sciences, 2019)
      We focus differential geometry of the Henry Smith surface in the three dimensional Euclidean space. We calculate the Gaussian and the mean curvatures of the surface, drawing its figure. In addition, we find algebraic ...
    • Rotational hypersurface in 4-Space 

      Güler, Erhan; Magid, Martin; Yaylı, Yusuf (Ahi Evran Üniversitesi, 2016)
      We consider rotational hypersurface in the four dimensional Euclidean space. We calculate the mean and the Gaussian curvature, and some relations of the rotational hypersurface. Moreover, we give the Laplace-Beltrami ...
    • Rotational hypersurfaces in S3(r)XR product space 

      Güler, Erhan; Kişi, Ömer (Sakarya University Journal of Science, 2017)
      We consider rotational hypersurfaces in S3(r)XR product space of five dimensional Euclidean space E^5. We calculate the mean curvature and the Gaussian curvature, and give some results.
    • The second laplace-beltrami operator on rotational hypersurfaces in the euclidean 4-space 

      Güler, Erhan; Kişi, Ömer (2018)
      We consider rotational hypersurface in the four dimensional Euclidean space. We calculate the mean curvature and the Gaussian curvature, and some relations of the rotational hypersurface. Moreover, we define the second ...
    • The second laplace-Beltrami operator on rotational hypersurfaces in the euclidean 4-space 

      Güler, Erhan; Kişi, Ömer (Yıldız Teknik Üniversitesi, 2017)
      We consider rotational hypersurface in the four dimensional Euclidean space. Wecalculate the mean curvature and the Gaussian curvature, and some relations of therotational hypersurface. Moreover, we de ne the second ...
    • Timelike rotational surfaces with lightlike profile curve 

      Güler, Erhan; Hacısalihoğlu, Hasan Hilmi (2011)
    • Ulisse dini-type helicoidal hypersurface 4-space 

      Güler, Erhan; Gümüşok Karaalp, Ayçın (Ordu Üniversitesi, 2018)
      We considerUlisse Dini-type helicoidal hypersurface in Euclidean 4-space E4.We give some basic notions of the fourdimensional Euclidean geometry in section 2.In section 3, we consider Ulisse Dini helicoidal hypersurface.We ...