Liouville field theory approach to 2-dimensional gravity possesses the duality ($b \leftrightarrow b^{ -1}$). The matrix counterpart of minimal gravity $\mathcal{ M}(q,p)$ ($q<p$ co-prime) is effectively described on $A_{ q-1}$ Frobenius manifold, which may exhibit a similar duality $p\leftrightarrow q$, and allow a description on $A_{ p-1}$ Frobenius manifold. We have positive results from the bulk one-point and the bulk-boundary two-point correlations on disk that the dual description of the Frobenius manifold works for the unitary series $\mathcal{ M}(q, q+1)$. However, for the Lee-Yang series $\mathcal{ M}(2, 2q+1)$ on disk the duality is checked only partially. The main difficulty lies in the absence of a canonical description of trace in the continuum limit.
Categories: hep-th