On Real Hypersurfaces in S2×S2 and H2×H2 with Parallel Normal Jacobi Operator.

In this paper, we study real hypersurfaces of the two Kähler surfaces S 2 × S 2 and H 2 × H 2. As the main results, amongst others, we classify all such hypersurfaces whose normal Jacobi operators are parallel with respect to either the Levi-Civita connection or the k-generalized Tanaka–Webster connection. [ABSTRACT FROM AUTHOR]