Bull. Korean Math. Soc. 2017; 54(1): 253-264
Online first article January 12, 2017 Printed January 31, 2017
https://doi.org/10.4134/BKMS.b160082
Copyright © The Korean Mathematical Society.
Bayram \c{S}ahin
Ege University
We first extend Yano-Nomizu's theorem, which characterizes extrinsic spheres in a Riemannian manifold, for Riemannian maps. Then we introduce Clairaut Riemannian maps, give an example and obtain necessary and sufficient conditions for a Riemannian map to be Clairaut type.
Keywords: Riemannian map, circle, Clairaut submersion, Clairaut Riemannian map
MSC numbers: 53C42, 53C20
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