On the Nonexistence of a Hypersurface of Prescribed Mean Curvature with a Given Boundary.
On the order of natural differential operators and liftings
On the osculating spaces of submanifolds in Euclidean spaces
On the Pick invariant
On the polar moment of inertia of the projection curve.
On the projective theory of spinors
On the Pseudo-Conformal Geometry of a Kähler Manifold.
On the reduction formulas
On the reduction theorems
On the Regularity of Minimal Surfaces with Free Boundaries in Riemannian Manifolds.
On the rigidity of certain surfaces in
On the rigidity of webs
Plane -webs have been studied a lot since their appearance at the turn of the 20th century. A rather recent and striking result for them is the theorem of Dufour, stating that the measurable conjugacies between 3-webs have to be analytic. Here, we show that even the set-theoretic conjugacies between two -webs, are analytic unless both webs are analytically parallelizable. Between two set-theoretically conjugate parallelizable -webs, however, there always exists a nonmeasurable conjugacy; still,...
On the Second Order Infinitesimal Bendings of a Class of Toroids
On the semicontinuity of curvatures.
On the Singular Structure of Two-Dimensional Area Minimizing Surfaces in Rn.
On the solution of the variational problem of the arc length in 4-dimensinal affine space.
On the space-time permeated by a viscous, compressible, thermally conducting, self-gravitating fluid with infinite electrical conductivity and constant magnetic permeability
On the special trace decomposition problem on quaternion structure.
On the stability of extremal surfaces for a certain area-type functional.
On the structure of certain Weingarten surfaces with boundary a circle