Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The effective cosmological constant in higher order gravity theories   An effective time--dependent cosmological constant can be recovered for
higher--order theories of gravity by extending to these ones the no--hair
conjecture. The results are applied to some specific cosmological models.

22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
19
The categories of this paper are: eess