Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pure-connection gravity and anisotropic singularities   In four space-time dimensions, there exists a special infinite-parameter
family of chiral modified gravity theories. They are most properly described by
a connection field, with space-time metric being a secondary and derived
concept. All these theories have the same number of degrees of freedom as
general relativity, which is the only parity-invariant member of this family.
Modifications of general relativity can be arranged so as to become important
in regions with large curvature. In this paper we review how a certain simple
modification of this sort can resolve the Schwarzschild black-hole and Kasner
anisotropic singularities of general relativity. In the corresponding
solutions, the fundamental connection field is regular in space-time.

23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph