中文

正 Fuss-Catalan 数与负 Calabi-Yau 范畴中的简单心智系统

表示论 2021-12-24 v3 组合数学 环与代数

摘要

对于 Dynkin 型遗传代数 HHd1d\ge 1,我们建立了 (d)(-d)-Calabi-Yau 簇范畴 Cd(H){\cal C_{-d}}(H)dd-简单心智系统(dd-SMSs)与包含在 D0D1d\cal D^{\le 0}\cap \cal D^{\ge 1-d} 中的 Db(H){\cal D^{\rm b}}(H) 的倾斜对象之间的双射。通过应用此双射以及 Buan-Reiten-Thomas 与 Zhu 关于 Fomin-Reading 广义簇复形的结果,我们证明了 Cd(H){\cal C_{-d}}(H)dd-SMSs 的数目为相应 Weyl 群 WW 的正 Fuss-Catalan 数 Cd+(W)C_{d}^{+}(W)。我们的结果基于倾斜-tt-结构对应的一项精细化版本。

关键词

引用

@article{arxiv.2002.09952,
  title  = {Positive Fuss-Catalan numbers and Simple-minded systems in negative Calabi-Yau categories},
  author = {Osamu Iyama and Haibo Jin},
  journal= {arXiv preprint arXiv:2002.09952},
  year   = {2021}
}

备注

15 pages, many improvements due to referees, the algebra KQ for Dynkin quiver Q has been generalized to hereditary algebra H of Dynkin type, End(X)=k in the definition of SMC has been generalized to End(X)=a division k-algebra, an appendix about exceptional mutation has been added, to appear in International Mathematics Research Notices