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math.AG2021
Chern character and obstructions to deforming cycles
Sen Yang
Following Bloch-Esnault-Kerz and Green-Griffiths' recent works on deformation of algebraic cycle classes, we use Chern character from K-theory to negative cyclic homology to show h…
math.AG2021
Chern character, semi-regularity map and obstructions
Sen Yang
Using Chern character, we construct a natural transformation from the local Hilbert functor to a functor of Artin rings defined from Hochschild homology, which allows us to reconst…