Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chern-Simons modified gravity and closed time-like curves   We verify the consistency of the G\"odel-type solutions within the
four-dimensional Chern-Simons modified gravity with the non-dynamical
Chern-Simons coefficient, for different forms of matter including dust, fluid,
scalar field and electromagnetic field, and the related causality issues.
Unlike the general relativity, the vacuum solution turns out to be possible in
our theory. Another essentially new result of our theory having no analogue in
the general relativity consists in the existence of the hyperbolic causal
solutions for the physically well-motivated matter.

26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex