This letter discusses a modified Friedmann-Robertson-Walker cosmology in which the equation of state behaves like p = 3ηa m ρn -ρ,(η,m,n) ∈ <img src="/img/revistas/bjp/v40n2/a04img01.gif" align="absmiddle">. Many interesting features are revealed in particular the manifestation of domain wall, cosmic string, stiff matter, dust and radiation/ultra-relativistic particles.
Super-accelerated expansion; dark energy; domain wall; cosmic string; stiff matter
