Generalized weakly Ricci-symmetric (CS)4-spacetimes
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DOI: 10.1016/j.geomphys.2018.05.029
Abstract: Abstract ( C S ) 4 -spacetimes with Einstein field equations under some curvature restriction named generalized weakly Ricci-symmetry have been studied. We have proved that if the characteristic vector field ΞΎ of a generalized… read more here.
Keywords: ricci symmetric; generalized weakly; weakly ricci; vector field ... See more keywords
Geodesic mappings of spaces with affine connnection onto generalized Ricci symmetric spaces
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DOI: 10.2298/fil1914475b
Abstract: The presented work is devoted to study of the geodesic mappings of spaces with affine connection onto generalized Ricci symmetric spaces. We obtained a fundamental system for this problem in a form of a system… read more here.
Keywords: geodesic mappings; ricci symmetric; generalized ricci; symmetric spaces ... See more keywords