BRST cohomology ring in 2D gravity coupled to minimal models

H. Kanno, M. H. Sarmadi

The ring structure of Lian-Zuckerman states for $(q,p)$ minimal models coupled to gravity is shown to be $\mathcal{R}={\mathcal{R}}_0\otimes \mathbf{C}[w,w^{-1}]$ where ${\mathcal{R}}_0$ is the r…