Noncompact Kaluza-Klein theory and inflationary cosmology: a complete   formalism
  A formalization of the recently introduced formalism for inflation is developed from noncompact Kaluza-Klein theory. In particular, the case for a single scalar field inflationary model is studied. We obtain that the scalar potential, which assume different representations in different frames, has a geometrical origin. 
Jose Edgar Madriz Aguilar (IFM, Michoacana University) and Mauricio   Bellini (Mar del Plata University & CONICET)