Weakly Einstein Equivalence in a Golden Space Form and Certain CR-submanifolds
Makaleler > Tam Makale · 2023
Yazarlar: Jihun Kim, Jeonghyeong Park, Bayram ŞAHİN
Mathematica Slovaca, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2023, cilt 73, ss 1615-1627
DOI: 10.1515/ms-2023-0117
Özet
ABSTRACT It is known that the Golden space form may not be an Einstein manifold. In this paper, it is shown that the condition to be Einstein for a Golden space form is equivalent to being weakly Einstein. In addition, the partial geodesic and cyclic parallelism of the CR-submanifolds of a Golden space are examined, and the case of the constant Golden sectional curvature is determined. Moreover, the CR-submanifolds with semi-flat normal connection are studied and an inequality is obtained. The equality case of this inequality is also checked. We also consider the totally umbilical CR-submanifold of Golden Riemannian manifolds and show that such submanifolds are totally geodesic under certain conditions. Furthermore, we obtain an inequality involving the scalar curvature of CR-submanifold and check the existence of extrinsic spheres in Golden space forms.