Bijections of silting complexes and derived Picard groups
Bijections of silting complexes and derived Picard groups
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淤积复合体和派生皮卡德群的双射
DOI:
10.1112/jlms.12591
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Eisele F
中科院分区:
文献类型:
--
作者:
Eisele F
We introduce a method that produces a bijection between the posets silt−A$\textrm {{{\bf silt}}-}{A}$ and silt−B$\textrm {{{\bf silt}}-}{B}$ formed by the isomorphism classes of basic silting complexes over finite‐dimensional k$k$‐algebras A$A$ and B$B$, by lifting A$A$ and B$B$ to two k[[X]]$k[\![X]\!]$‐orders which are isomorphic as rings. We apply this to a class of algebras generalising Brauer graph and weighted surface algebras, showing that their silting posets are multiplicity‐independent in most cases. Under stronger hypotheses, we also prove the existence of large multiplicity‐independent subgroups in their derived Picard groups as well as multiplicity‐invariance of TrPicent${\operatorname{\bf TrPicent}}$. As an application to the modular representation theory of finite groups, we show that if B$B$ and C$C$ are blocks with |IBr(B)|=|IBr(C)|$|\operatorname{IBr}(B)|=|\operatorname{IBr}(C)|$ whose defect groups are either both cyclic, both dihedral or both quaternion, then the posets tilt−B$\textrm {{{\bf tilt}}-}{B}$ and tilt−C$\textrm {{{\bf tilt}}-}{C}$ are isomorphic (except, possibly, in the quaternion case with |IBr(B)|=2$|\operatorname{IBr}(B)|=2$) and TrPicent(B)≅TrPicent(C)${\operatorname{\bf TrPicent}}(B)\cong {\operatorname{\bf TrPicent}}(C)$ (except, possibly, in the quaternion and dihedral cases with |IBr(B)|=2$|\operatorname{IBr}(B)|=2$).
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DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
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通讯作者:
毛利出
影响因子:
0.5
作者:
R. Hemminger
通讯作者:
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影响因子:
0.9
作者:
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通讯作者:
T. Holm
影响因子:
1.7
作者:
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通讯作者:
Andrzej Skowro'nski
影响因子:
0.7
作者:
O. Iyama;Xiaojin Zhang
通讯作者:
O. Iyama;Xiaojin Zhang