Cosmic Numbers: A Physical Classification for Cosmological Models
  We introduce the notion of the cosmic numbers of a cosmological model, and discuss how they can be used to naturally classify models according to their ability to solve some of the problems of the standard cosmological model. 
P.P. Avelino (1,2) and C.J.A.P. Martins (1,3,4) ((1) CAUP, Porto; (2)   DF-FCUP, Porto; (3) DAMTP, Cambridge; (4) IAP, Paris)