Yeqin Liu

activity

20242026

collaborators

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2 papers · 1 filter

math.RA2025

A counterexample to DG version of Han's conjecture

Yeqin Liu, Yu Shen

In 2004, Han proposed the following conjecture: let $B$ be a finite-dimensional $k$ -algebra. If $HH_{n} (B) \neq = 0$ for only finitely many $n \in Z$ , then $B$ is smo…

math.AG2025

Picard group action on the category of twisted sheaves

Ting Gong, Yeqin Liu, Yu Shen

In this paper, we study the category of twisted sheaves over a scheme $X$ . Let $M$ be a quasi-coherent sheaf on $X$ , and $α$ in $Br (X)$ . We show that the f…