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math.DG2019
Curvature constrained on base for -Einstein warped product manifolds
Alexander Pigazzini, Cenap Ozel, Saeid Jafari
For the studied cases in [10], the author showed that having the {\textit {-curvature-Base}} () is equal to requiring a flat metric on the base-manifold. In [11] the au…
math.GR2019
On topological rough groups
Nof Alharbi, Alla Altassan, Hassen Aydi +1
In this paper, we give an introduction for rough groups and rough homomorphisms. Then we present some properties related to topological rough subgroups and rough subsets. We constr…