Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Recent Developments in Classical and Quantum Theories of Connections,
  Including General Relativity   General relativity can be recast as a theory of connections by performing a
canonical transformation on its phase space. In this form, its (kinematical)
structure is closely related to that of Yang-Mills theory and topological field
theories. Over the past few years, a variety of techniques have been developed
to quantize all these theories non-perturbatively. These developments are
summarized with special emphasis on loop space methods and their applications
to quantum gravity.

5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th