Explicit Description of A Certain Destabilizing Wall of Skyscraper Sheaves on Ruled Surfaces

Abstract

We give a explicit description of gluing stability conditions on ruled surfaces by introducing gluing perversity. Moreover, we describe a destabilizing wall of skyscraper sheaves on ruled surfaces by deformation of stability conditions glued from $\widetilde{G{L}^{+}}(2,\mathbb{R})$-translates of the standard stability condition on the base curve.

arXiv comment12 pages, 2 figures, I correct my several mistakes of the previous version