Cosmological acceleration in massive gravity Seminar

I will discuss cosmological solutions in massive gravity, that
are potentially able to describe the present day acceleration of our
universe with no need of any dark energy contribution. After a pedagogical
review of massive gravity, I will discuss the techniques that allow to
analyze the intriguing behavior of cosmological perturbations around the
simplest of such cosmological solutions, presenting new and unexpected
results arising at third order in a perturbative expansion.