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math.DG2019
Quasi--minimal surfaces of pseudo--Riemannian space forms with positive relative nullity
Burcu Bektaş Demirci, Nurettin Cenk Turgay
In this paper, we consider surfaces in 4--dimensional pseudo--Riemannian space--forms with index 2. First, we obtain some of geometrical properties of such surfaces considering the…
math.GM2019
Biconservative quasi-minimal immersions into semi-Euclidean spaces
Rüya Yeğin Şen, Alev Kelleci, Nurettin Cenk Turgay +1
In this paper we study biconservative immersions into the semi-Riemannian space form of dimension 4, index 2 and constant curvature, where . First, we ob…