Białynicki-Birula Decompositions of Nakajima Quiver Varieties, Quiver Chains and Star-Shaped Quivers

Juan Sebastian Numpaque-Roa

This paper studies the Białynicki--Birula decomposition associated with the natural ${\mathbb{C}}^{\ast }$-action on Nakajima quiver varieties given by scaling the maps along the reversed a…