扭转增殖
Torsion proliferation
- Max-Planck-Institut für Mathematik(马克斯·普朗克数学研究所)
- The University of Sydney(悉尼大学)
机构由 AI 辅助整理,请以论文原文为准。
AI总结:
本文研究有限旗簇中舒伯特簇上层的通用性质,证明随着代数群秩增大,几乎所有交上同调层含 $p$-扭转且宇称层非反常,并给出部分旗簇族的显式渐近。
AI中文摘要:
本文考虑有限旗簇中舒伯特簇上支撑的层的通用行为。我们的主要结果是:对于任意固定的素数 $p$,随着相关代数群的秩增长,几乎每个交上同调层在其茎或余茎中都会出现 $p$-扭转,且几乎每个不可分解的宇称层都不是反常的。对于某些部分旗簇族,我们还确定了这种增长的显式渐近行为。
英文摘要:
This paper considers the generic behaviour of sheaves supported on Schubert varieties in finite flag varieties. Our main results are that, for any fixed prime $p$, as the rank of the associated algebraic group grows, almost every intersection cohomology sheaf admits $p$-torsion in its stalks or costalks, and almost every indecomposable parity sheaf is not perverse. For certain families of partial flag varieties we also determine explicit asymptotics for this growth.