8 citations · 14 across the 5 of their papers we have counts for
5 papers
On Thurston's geometrical space form problem: on quasi space forms
Stefan Haesen, Miroslava Petrović-Torgašev, Leopold Verstraelen
A proposal is made for what may well be the most elementary Riemannian spaces which are homogeneous but not isotropic. In other words: a proposal is made for what may well be the n…
On the extrinsic principal directions and curvatures of Lagrangian submanifolds
Marilena Moruz, Leopold Verstraelen
From the basic geometry of submanifolds will be recalled what are the extrinsic principal tangential directions, (first studied by Camille Jordan in the seventies), and what ar…
Notes on isotropic geometry of production models
Bang-Yen Chen, Simona Decu, Leopold Verstraelen
The production function is one of the key concepts of mainstream neoclassical theories in economics. The study of the shape and properties of the production possibility frontier is…
Laplace Transformations of Submanifolds
Bang-Yen Chen, Leopold Verstraelen
Let be an isometric immersion of a Riemannian manifold into a Euclidean -space. Denote by the Laplace operator of . Then gives rise to a different…
Ideally embedded space-times
Stefan Haesen, Leopold Verstraelen
Due to the growing interest in embeddings of space-time in higher-dimensional spaces we consider a specific type of embedding. After proving an inequality between intrinsically def…