Dynamical dark energy models with singularities in the view of the
  forthcoming results of the growth observations
  The question of the origin of the recent acceleration of the Universes
expansion is still pending. What is making the situation even worst, it is
impossible to distinguish the vast majority of the proposed models of the
dynamical dark energy and modified gravity from the $\Lambda CDM$ in view of
recent geometrical and dynamical, observational data. On the other hand on
scales much smaller than the present Hubble scale, there are differences in the
growth of the matter perturbations for different modes of the perturbations in
the $\Lambda CDM$. In the view of the new planned observations that will give
insight into the perturbations of the dark sector this issue is being worth of
further investigation. We analyze the evolution of the dark matter
perturbations in the dynamical dark energy models with the singularities, such
as the sudden future singularity and the finite scale factor singularity. We
employ the Newtonian gauge formulation for derivation of the perturbation
equations for the growth function. We abandon the sub-Hubble approximation,
what leads to the scale dependent solutions for the perturbations. Treating the
growth function as a scale dependent allows to differentiate the dynamical dark
energy models with the singularities and the dynamical dark energy models and
the $\Lambda CDM$. The new data constraining growth of the perturbations will
be able to rule out the whole range of the values of the parameters allowed by
the present data of the dynamical dark energy models with the sudden future
singularity and the finite scale factor singularity.
