Commun. Korean Math. Soc. 1997 Vol. 12, No. 4, 999-1006
Byung Hak Kim, In-Bae Kim Kyung Hee University, Hankuk University of Foreign studies
Abstract : We proved that if a fibred Riemannian space $\tilde M$ with cosymplectic structure is conformally flat, then $\tilde M$ is the locally product manifold of locally Euclidean spaces, that is locally Euclidean. Moreover, we investigated the fibred Riemannian space with cosymplectic structure when the Riemannian metric $\tilde g$ on $\tilde M$ is Einstein.