Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cosmological Models with a Varying $\Lambda$ -Term in Lyra's Geometry   Cosmological models in Lyra's geometry are constructed and investigated with
the assumption of a minimal interaction of matter with the displacement vector
field and the dynamical $\Lambda$ - term. Exact solutions of the model
equations are obtained for the different equations of state of the matter, that
fills the universe, and for the certain assumptions on the decaying law for
$\Lambda$.

11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol