The spectrum $\mathcal{S}$ of Liouville theory

 The spectrum $\mathcal{S}$ of Liouville theory

$ \mathcal{S} = \int_{\frac{c - 1}{24} + \mathbb{R}_{+}} d \Delta \mathcal{V}_{\Delta} \otimes \bar{\mathcal{V}}_{\Delta}$