A Note on the Automorphism Group of the Bielawski-Pidstrygach Quiver

We show that there exists a morphism between a group Gamma(alg) introduced by G. Wilson and a quotient of the group of tame symplectic automorphisms of the path algebra of a quiver introduced by Bielawski and Pidstrygach. The latter is known to act transitively on the phase space C-n,C-2 of the Gibbons-Hermsen integrable system of rank 2, and we prove that the subgroup generated by the image of Gamma(alg) together with a particular tame symplectic automorphism has the property that, for every pair of points of the regular and semisimple locus of C-n,C-2, the subgroup contains an element sending the first point to the second. (AU)