Chinese 叠 (数学) Cited by user 書畫晝盡 on 27 Nov 2023 叠(Stack)或2层(2-sheaf)是在范畴而非集合上取值的层. 叠用于形式化下降理论的一些主要构造,以及在不存在精细模空间时构造精细模叠.
English Sheaf on an algebraic stack Cited by user Silvermatsu on 15 Sep 2022 In algebraic geometry, a quasi-coherent sheaf on an algebraic stack is one obtained by descending a quasi-coherent sheaf on U.