New inextensible flows of principal normal spherical image
Abstract
In this work, we study normal spherical indicatrices (images) in terms of inextensible flows in 𝔼3. We discuss the geometric properties of the normal spherical indicatrices. Furthermore, we give some new characterizations of curvatures in terms of some partial differential equations in 𝔼3.
Communicated by J. Koppitz