Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Crossing the phantom barrier with purely kinetic multiple k-essence   We consider multiple k-essence sources and obtain the conditions their
kinetic functions must satisfy so that purely kinetic k-essences lead to models
with phantom barrier crossing. After that, we show that polynomial kinetic
functions allow the integration of the dynamical equations determining the
geometry and the k-fields. The models thus obtained have accelerated expansion
at late cosmic time, representing universes ending at a finite time with a big
rip singularity. In addition, these models begin to evolve from an initial
singularity, so they have a finite time span.

23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics