Einstein–Gauss–Bonnet (EGB) model is recently restudied in order to analyze new consequences gravitation, modifying appropriately the Einstein–Hilbert action. The EGB cosmology are mainly geometric, with higher values Hubble parameter. In this vein paper devoted contribute extra evidences about its pros and cons of from a cosmological point view. We start constraining characteristic parameter, ...

An introduction to modern theories for the origin of structure in the Universe is given. After a brief review of the growth of cosmological perturbations in an expanding Universe and a summary of some important observational results, the lectures focus on the inflationary Universe scenario and on topological defect models of structure formation. A summary of the theory and current observational...