• Bour's theorem in Minkowski 3-space 

      Güler, Erhan; Turgut Vanlı, Aysel (Kyoto Journal of Mathematics, 2006)
      In this study, we show that a Generalized helicoid with null axis is isometric to a rotation surface with null axis so that helices on the Helicoid correspond to parallel circles on the rotation surface in three dimensional ...