Dupin hypersurface

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In differential geometry, a Dupin hypersurface is a submanifold in a space form, whose principal curvatures have globally constant multiplicities.[1]

Application

A hypersurface is called a Dupin hypersurface if the multiplicity of each principal curvature is constant on hypersurface and each principal curvature is constant along its associated principal directions.[2] All proper Dupin submanifolds arise as focal submanifolds of proper Dupin hypersurfaces.[3]

References