The pseudo-umbilical surfaces in \(\mathbb{R}^4\) and their Gauss maps
The authors study properties of pseudo-umbilical surfaces in a \(4\)-dimensional Euclidean space \(\mathbb{R}^4\). By using the Gauss map, they give two sufficient conditions for \(M\) to be a flat torus.
scientific article; zbMATH DE number 1649034