Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1992-09-30
Physics
High Energy Physics
High Energy Physics - Theory
8 pages, IC/92/301
Scientific paper
(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.
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