Demir N. Küpeli

A curvature condition for a twisted product¶to be a warped product

Manuel Fernández-López, Eduardo García‐Río, Demir N. Küpeli et al. · manuscripta mathematica · 2001 · 73 citations

Twisted Product¶to, Geometric Partial Differential Equation, Geometry +6

On a problem of Osserman in Lorentzian geometry

Eduardo García‐Río, Demir N. Küpeli, M. E. Vázquez-Abal · Differential Geometry and its Applications · 1997 · 59 citations · Full text

Affine Osserman connections and their Riemann extensions

Eduardo García‐Río, Demir N. Küpeli, M. E. Vázquez-Abal et al. · Differential Geometry and its Applications · 1999 · 41 citations · Full text

On a differential equation characterizing Euclidean spheres

Eduardo García‐Río, Demir N. Küpeli, Bülent Ünal · Journal of Differential Equations · 2003 · 39 citations

Geometric Partial Differential Equation, Geometry, Riemannian Geometry +2

Degenerate submanifolds in Semi-Riemannian geometry

Demir N. Küpeli · Geometriae Dedicata · 1987 · 30 citations

Global Geometry, Geometry, Riemannian Geometry +2