Räumliche Zindlerkurven.
Rayon de la sphère circonscrite au tétraèdre en fonction des arêtes
Recherches analytiques sur la surface du troisième ordre qui est la réciproque de la surface de Steiner
Regelflächen festen Dralls mit konstant gedralltem Striktionsband
Regelflächen vom Weingarten-Typ
Regelflächenpaare mit einer abwickelbaren Quasifleknodalfläche
Regolarità di frontiere minimali con ostacoli sottili
Relation between algebraic and geometric view on NURBS tensor product surfaces
NURBS (Non-Uniform Rational B-Splines) belong to special approximation curves and surfaces which are described by control points with weights and B-spline basis functions. They are often used in modern areas of computer graphics as free-form modelling, modelling of processes. In literature, NURBS surfaces are often called tensor product surfaces. In this article we try to explain the relationship between the classic algebraic point of view and the practical geometrical application on NURBS.
Relaxed hyperelastic curves
We define relaxed hyperelastic curve, which is a generalization of relaxed elastic lines, on an oriented surface in three-dimensional Euclidean space E³, and we derive the intrinsic equations for a relaxed hyperelastic curve on a surface. Then, by examining relaxed hyperelastic curves in a plane, on a sphere and on a cylinder, we show that geodesics are relaxed hyperelastic curves in a plane and on a sphere. But on a cylinder, they are relaxed hyperelastic curves only in special cases.
Remark on surfaces in satisfying certain relations between covariant derivatives of the mean and Gauss curvatures
Remarks on the Isoperimetric Inequality for Multiply-connected H-Surfaces.
Remarque sur la note de M. Floquet relative à l'intégration de l'équation d'Euler
Remarques sur une classe générale de surfaces, et en particulier sur la surface lieu des points dont la somme des distances à deux droites fixes est constante
Representing Seashells Surface
Ruled surfaces treated in terms of relative geometry. (Regelflächen relativgeometrisch behandelt.)
Ruled Surfaces with Vanishing Second Gaussian Curvature.