Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bibliography of publications related to Classical and Quantum Gravity in
  terms of Connection and Loop Variables   This bibliography attempts to give a comprehensive overview of all the
literature related to the Ashtekar connection and the Rovelli-Smolin loop
variables. The original version was compiled by Peter H\"ubner in 1989, and it
has been subsequently updated by Gabriela Gonzalez, Bernd Br\"ugmann, Monica
Pierri, Troy Schilling, Alejandro Corichi and Christopher Beetle. Information
about additional literature, new preprints, and especially corrections are
always welcome.

7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph