Associated to a convex integral polygon $N$ is cluster integrable system $\mathcal X\_N$ constructed from the dimer model. We compute group $G\_N$ of symmetries X\_N$, called (2-2) modular group, showing that it certain abelian conjectured by Fock and Marshakov. Combinatorially, non-torsion elements are ways shuffling underlying bipartite graph, generalizing domino-shuffling. Algebro-geometrica...

The quasi-deuteron model introduced by Levinger is used to explain cross sections for knocking out high-momentum protons in photo-absorption on nuclei. This within a framework we characterize as exhibiting high renormalization group (RG) resolution. Assuming one-body reaction operator, the nuclear wave function must include two-body short-range correlations (SRCs) with deuteron-like quantum num...