Homology of depth-graded motivic Lie algebras and koszulity

Homology of depth-graded motivic Lie algebras and koszulity
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深度分级动机李代数和 koszuulity 的同调

DOI:
10.5802/jtnb.966
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发表时间:
2014
期刊:
arXiv: Representation Theory
影响因子:
--
通讯作者:
P. Lochak
P. Lochak
中科院分区:
--
文献类型:
--
作者:
B. Enriquez;P. Lochak

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Broadhurst-Kreimer(BK)猜想描述了双阶化李代数A的Hilbert级数与多重zeta值的关系。Brown对这类李代数的同调性提出了一个概念性的描述(同调猜想(HC)),并证明了它蕴含BK猜想。我们表明,HC的一部分相当于A的介绍,HC的其余部分相当于一个较弱的声明。最后,我们证明了给予HC的第一部分,HC的其余部分是等价于以下任何一个等价的陈述:(a)消失的第三个同调群的李代数与二次表示,构造出的周期多项式的模形式;(B)koszulity的包络代数的这个李代数。
The Broadhurst-Kreimer (BK) conjecture describes the Hilbert series of a bigraded Lie algebra A related to the multizeta values. Brown proposed a conjectural description of the homology of this Lie algebra (homological conjecture (HC)), and showed it implies the BK conjecture. We show that a part of HC is equivalent to a presentation of A, and that the remaining part of HC is equivalent to a weaker statement. Finally, we prove that granted the first part of HC, the remaining part of HC is equivalent to either of the following equivalent statements: (a) the vanishing of the third homology group of a Lie algebra with quadratic presentation, constructed out of the period polynomials of modular forms; (b) the koszulity of the enveloping algebra of this Lie algebra.
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发表时间: 2006-03
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