Einige Eindeutigkeitssätze in der affinen Differentialgeometrie. (Some uniqueness theorems in affine differential geometry)
The paper begins with remarks on the characterization of ellipsoids by constant affine mean curvatures and on the variation of the affine surface area. The following theorem is shown: If related points of two convex surfaces have always parallel difference vectors and the same values of the first mean curvature, then they are affine images of each other.
scientific article; zbMATH DE number 4060229