On the Divergence of the Unit Normal

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Authors

DOI:

https://doi.org/10.18311/jims/1930/17481

Abstract

If a surface V2 is immersed in a Euclidean space E3 of three dimensions, then we know from Dupin's Theorem, that at any point of V2 the sum of the curvatures of any two perpendicular normal sections is a constant equal to the sum of the principal curvatures.