3 papers
math.AG2025
A Looming of phantoms
Kimoi Kemboi, Daniel Krashen, Tianle Liu +6
Following Krah's method, we construct new examples of phantom categories as semiorthogonal components of the derived categories of two types of rational surfaces: the blowup of the…
math.AG2025
Geometric phantom categories do not admit Noetherian t-structures
Yeqin Liu
There are no Noetherian or Artinian bounded t-structures on geometric phantom or quasi-phantom categories.
math.AG2025
Stringy Chow rings and weighted blow ups
Qiangru Kuang, Yeqin Liu, Rachel Webb +1
We compute the stringy chow ring of a general Deligne-Mumford stack of the form [X/G] for a smooth variety X and diagonalizable group scheme G, working over a base field that is no…