Lorentzian 3-manifolds and dynamical systems.

We would like to solve this problem by using the One-dimensional Convex Integration Theory.. But there is no obvious choice

We study the optimal systolic ratio of compact 3-dimensional orientable Bieberbach manifolds which are not tori, and prove that it cannot be realized by a flat metric.. We also

Using, on the one side, a general result in linear algebra due to Klingenberg (see [Kli54]) and on the other side, a theorem on the holonomy of pseudo-Riemannian ma- nifolds

If M is a compact K~ihler manifold diffeomorphic (or, more generally, homotopically equivalent) to a quotient N of an irreducible bounded symmetric domain, he studied a

In the cases which were considered in the proof of [1, Proposition 7.6], the case when the monodromy group of a rank 2 stable bundle is the normalizer of a one-dimensional torus

[7] Chunhui Lai, A lower bound for the number of edges in a graph containing no two cycles of the same length, The Electronic J. Yuster, Covering non-uniform hypergraphs

In this note we prove that the essential spectrum of a Schrödinger operator with δ-potential supported on a finite number of compact Lipschitz hypersurfaces is given by [0, +∞)..

Wang, Error analysis of the semi-discrete local discontinuous Galerkin method for compressible miscible displacement problem in porous media, Applied Mathematics and Computation,