Systolic geometry and regularization technique

Abstract

The aim of this text is to present the concept of systole of a compact riemannian manifold and to give an overview of systolic geometry. I will also present the "regularization technique", which leads to major results in systolic geometry. I will detail how this technique allows to link the systolic volume of some closed riemannian manifolds to homotopical invariants of these manifolds, such as the Betti numbers (according to Gromov) and the minimal entropy (according to Sabourau).