Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Ring Structure of Chiral Operators for Minimal Models Coupled to 2D
  Gravity   (Talk presented at the 1992 ICTP summer workshop in high energy physics and
cosmology) The BRST cohomology ring for $(p,q)$ models coupled to gravity is
discussed. In addition to the generators of the ghost number zero ring, the
existence of a generator of ghost number $-1$ and its inverse is proven and
used to construct the entire ring. Some comments are made regarding the algebra
of the vector fields on the ring and the supersymmetric extension.

4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas