Commun. Korean Math. Soc. 1997; 12(4): 999-1006
Printed December 1, 1997
Copyright © The Korean Mathematical Society.
Byung Hak Kim, In-Bae Kim
Kyung Hee University, Hankuk University of Foreign studies
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.
Keywords: fibred Riemannian space, cosymplectic manifold, conformally flat, critical Riemannian metric
MSC numbers: 53A30, 53B20
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