On Hypercylinders in Conformally Symmetric Manifolds


Ryszard Deszcz


Hypercylinders in conformally symmetric manifolds are considered. The main result is the following theorem: Let $(M,g)$ be a hypercylinder in a parabolic essentially conformally symmetric manifold $(N,\widetilde g)$, $\dim N\ge 5$ and let $\widetolde U$ be the subset od $N$ consisting of all points of $N$ at which the Ricci tensor $\widetilde S$ of $(N,\widetilde g)$ is not recurrent. If $\widetilde U\cap M$ is a dense subset of $M$, then $(M,g)$ is a conformally recurrent manifold.