Lie algebras arising from 1-cyclic perfect complexes
Lie algebras arising from 1-cyclic perfect complexes
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由 1 循环完美复形产生的李代数
DOI:
10.1016/j.jalgebra.2021.06.030
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发表时间:
2017-05
影响因子:
0.9
通讯作者:
Zhang Haicheng
中科院分区:
文献类型:
--
作者:
Ruan Shiquan;Sheng Jie;Zhang Haicheng
Let A be the path algebra of a Dynkin quiver Q over a finite field, and P be the category of projective A-modules. Denote by C 1 (P) the category of 1-cyclic complexes over P, and n˜+ the vector space spanned by the isomorphism classes of indecomposable and non-acyclic objects in C 1 (P). In this paper, we prove the existence of Hall polynomials in C 1 (P), and then establish a relationship between the Hall numbers for indecomposable objects therein and those for A-modules. Using Hall polynomials evaluated at 1, we define a Lie bracket in n˜+ by the commutators of degenerate Hall multiplication. The resulting Hall Lie algebras provide a broad class of nilpotent Lie algebras. For example, if Q is bipartite, n˜+ is isomorphic to the nilpotent part of the corresponding semisimple Lie algebra; if Q is the linearly oriented quiver of type A n, n˜+ is isomorphic to the free 2-step nilpotent Lie algebra with n-generators. Furthermore, we give a description of the root systems of different n˜+. We also characterize the Lie algebras n˜+ by generators and relations. When Q is of type A, the relations are exactly the defining relations. As a byproduct, we construct an orthogonal exceptional pair satisfying the minimal Horseshoe lemma for each sincere non-projective indecomposable A-module.
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DOI:
--
发表时间:
2006-11
期刊:
arXiv: Representation Theory
影响因子:
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作者:
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通讯作者:
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影响因子:
0.9
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作者:
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影响因子:
3.1
作者:
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影响因子:
0.9
作者:
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通讯作者:
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