Redshift-drift as a test for discriminating between decelerating
  inhomogeneous and accelerating universe models
  Exact inhomogeneous solutions of Einstein's equations have been used in the
literature to build models reproducing the cosmological data without dark
energy. However, owing to the degrees of freedom pertaining to these models, it
is necessary to get rid of the degeneracy often exhibited by the problem of
distinguishing between them and accelerating universe models. We give an
overview of redshift drift in inhomogeneous cosmologies, and explain how it
serves to this purpose. One class of models which fits the data is the Szekeres
Swiss-cheese class where non-spherically symmetric voids exhibit a typical size
of about 400 Mpc. We present our calculation of the redshift drift in this
model, and compare it with the results obtained by other authors for alternate
scenarios.
