Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the ambiguities in the effective action in Lorentz-violating gravity   We investigate the occurrence of ambiguities for Lorentz-violating
gravitational Chern-Simons term. It turns out that this term is accompanied by
a coefficient depending on an undetermined parameter, due to an arbitrariness
in the choice of the conserved current.

26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th