Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the dynamics of unified k-essence cosmologies   We analyze the phase space of a particular unified model of dark matter, dark
energy, and inflation that we recently studied in [Phys. Rev. D 83, 063502
(2011)] whose Lagrangian is of the form L(X,phi) = F(X) - V(phi). We show that
this model possesses a large set of initial conditions consistent with a
successful cosmological model in which an inflationary phase is possible,
followed by a matter era to end with dark energy domination. In order to
understand the success of the model, we study the general features that unified
dark matter (UDM) models should comply and then we analyze some particular
models and find their constrictions.

13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph