Some cosmological solutions in Einstein-Chern-Simons gravity
  In this paper we find new solutions for the so called Einstein-Chern-Simons
Friedmann-Robertson-Walker field equations studied in refs. (Phys. Rev. D 84
(2011) 063506, Eur. Phys. J. C 74 (2014) 3087). We consider three cases:(i) in
the first case we find some solutions of the five-dimensional ChS-FRW field
equations when the $h^a$ field is a perfect fluid that obeys a barotropic
equation of state; (ii) in the second case we study the solutions, for the
cases $\gamma =1/2,\ 3/4$, when the $h^a$ field is a five dimensional
politropic fluid that obeys the equation $P^{(h)}=\omega ^{(h)}\rho ^{(h)\gamma
}$; (iii) in the third case we find the scale factor and the state parameter
$\omega (t)$ when the $h^a$ field is a variable modified Chaplygin gas.
  We consider also a space-time metric which contains as a subspace to the
usual four-dimensional FRW and then we study the same three cases considered in
the five-dimensional, namely when (i) the $h^a$ field is a perfect fluid, (ii)
the $h^a$ field is a five dimensional politropic fluid and (iii) the $h^a$
field is a variable modified Chaplygin gas.
