Some mathematical aspects in the expanding universe

Daniel Molano

Universidad Sergio Arboleda

ABSTRACT

Recent high-precision observations [3] have provided strong evidence that the Universe is in a phase of accelerated expansion. In the cosmological standard model with theory of gravity as General Relativity (GR), this accelerating phase can be explain with a component of negative pressure called Dark Energy. However, we do not have direct evidence of Dark Energy until now. It has motivated alternative models[2]. The models are modi_cations to the Einstein-Hilbert action. An important subset of these models are called generalized gravity theories, and they are based on non-linear lagrangians written in the generic form f(R), where f is a general di_erentiable function of the Ricci scalar R.

                       

  DATE:                       Wednesday, November 5 th, 2014

  TIME:                       6:00 pm
  CLASSROOM:        F 402