1 citations · 1 across the 3 of their papers we have counts for
3 papers
math.DG2010
On the boundedness of the sectional curvature of almost Hermitian manifolds
Adrijan Borisov, Ognian Kassabov
We prove the following results: An almost Hermitian manifold of indefinite metric is of pointwise constant holomorphic sectional curvature if the holomorphic sectional curvature is…
math.DG2010★ 1 cited
Curvature properties and isotropic planes of Riemannian and almost Hermitian manifolds of indefinite metrics
Adrijan Borisov, Georgi Ganchev, Ognian Kassabov
We study two types of isotropic planes: weakly isotropic and strongly isotropic planes. We prove that a Riemannian manifold of indefinite metric is conformally flat if and only if…
math.DG2010
On the sectional curvature of Kahler manifolds of indefinite metrics
Ognian Kassabov, Adrijan Borisov
Some curvature properties of Kahler manifolds of indefinite metrics are studied. Analogues of a Kulkarni's theorem are proved for such manifolds.