
doi: 10.4134/bkms.b160082
handle: 11454/33035 , 11454/25574
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.
Circle, Clairaut Riemannian-map, Riemannian map, Clairaut submersion, circle, Clairaut riemannian map
Circle, Clairaut Riemannian-map, Riemannian map, Clairaut submersion, circle, Clairaut riemannian map
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