2 papers
math.AG2024
Spin structures on perfect complexes
Nikolas Kuhn
We define spin structures on perfect complexes outside of characteristic two, generalizing the usual notion for vector bundles. We give an explicit local characterization of spin s…
math.AG2023
Degenerations of Sheaves on Fibered Surfaces
Nikolas Kuhn
We construct moduli stacks of stable sheaves for surfaces fibered over marked nodal curves by using expanded degenerations. These moduli stacks carry a virtual class and therefore…