Confluence on the Painlev\'e Monodromy Manifolds, their Poisson   Structure and Quantisation
  In this paper we obtain a system of flat coordinates on the monodromy manifold of each of the Painlev\'e equations. This allows us to quantise such manifolds. We produce a quantum confluence procedure between cubics in such a way that quantisation and confluence commute. We also investigate the underlying cluster algebra structure and the relation to the versal deformations of singularities of type $D_4,A_3,A_2$, and $A_1$. 
Marta Mazzocco, Vladimir Rubtsov
math-ph math.AG math.CV math.MP math.QA