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重Zeta值代数与稳定导子代数

The multiple zeta value algebra and the stable derivation algebra

Hidekazu Furusho

摘要:

MZV代数是由所有多重zeta值生成的${\bold Q}$上的分次代数。稳定的导子代数是Grothendieck-Teichmüller群的分次李代数版本。证明了从$\bold Q$上稳定的导子代数代数的分次对偶向量空间到新zeta空间,即MZV代数的分次大于2的极大理想的平方的子向量空间的商空间,存在一个标准满射$\bold Q $ -线性映射。作为推论,我们得到了MZV代数分次片在每个权上的维数的上界,它是由稳定导子代数分次片的维数表示的。如果Y. Ihara和P. Deligne关于稳定导子代数的结构的观点是成立的,这将成为Zagier在第一届欧洲数学大会上的演讲中所讨论的一个界限。通过稳定的导子代数,我们可以比较新zeta空间和与$\bold P ^1_ {\bar{\bold Q}}-{0,1,\infty}$的pro-$l$基本群上的伽罗瓦表示相关联的$l$ -adic Galois象李代数.

英文摘要:

The MZV algebra is the graded algebra over ${\bold Q}$ generated by all multiple zeta values. The stable derivation algebra is a graded Lie algebra version of the Grothendieck-Teichmüller group. We shall show that there is a canonical surjective $\bold Q $-linear map from the graded dual vector space of the stable derivation algebra over $\bold Q$ to the new-zeta space, the quotient space of the sub-vector space of the MZV algebra whose grade is greater than 2 by the square of the maximal ideal. As a corollary, we get an upper-bound for the dimension of the graded piece of the MZV algebra at each weight in terms of the corresponding dimension of the graded piece of the stable derivation algebra. If some standard conjectures by Y. Ihara and P. Deligne concerning the structure of the stable derivation algebra hold, this will become a bound conjectured in Zagier's talk at 1st European Congress of Mathematics. Via the stable derivation algebra, we can compare the new-zeta space with the $l$-adic Galois image Lie algebra which is associated with so the Galois representation on the pro-$l$ fundamental group of $\bold P ^1_ {\bar{\bold Q}}-{0,1,\infty}$ .

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