Dr Jose Beltran Jimenez
In order to regularize the energy of point-like charged particles, Born and Infeld introduced a modification of the Maxwell lagrangian that naturally imposes an upper bound on electromagnetic fields. This approach was later taken by Deser and Gibbons to propose an analogous modification for gravity. I will review some of these ideas as well as some extensions for the gravitational sector. Finally, a scenario where inflation could be supported by a set of massive particles within the context of these theories will be discussed.