Canonical equivariant cohomology classes generating zeta values of totally real fields
Canonical equivariant cohomology classes generating zeta values of totally real fields
复制标题
生成完全实数场的 zeta 值的规范等变上同调类
DOI:
10.1090/btran/144
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Shuji Yamamoto
中科院分区:
文献类型:
--
作者:
Kenichi Bannai;Kei Hagihara;Kazuki Yamada;Shuji Yamamoto
It is known that the special values at nonpositive integers of a Dirichlet
L
L
-function may be expressed using the generalized Bernoulli numbers, which are defined by a generating function. The purpose of this article is to consider the generalization of this classical result to the case of Hecke
L
L
-functions of totally real fields. Hecke
L
L
-functions may be expressed canonically as a finite sum of zeta functions of Lerch type. By combining the non-canonical multivariable generating functions constructed by Shintani [J. Fac. Sci. Univ. Tokyo Sect. IA Math. 23 (1976), pp. 393–417], we newly construct a canonical class, which we call the Shintani generating class, in the equivariant cohomology of an algebraic torus associated to the totally real field. Our main result states that the specializations at torsion points of the derivatives of the Shintani generating class give values at nonpositive integers of the zeta functions of Lerch type. This result gives the insight that the correct framework in the higher dimensional case is to consider higher equivariant cohomology classes instead of functions.
DOI:
--
发表时间:
2010
期刊:
Mathematische Annalen 346
影响因子:
--
作者:
Kenji Iida;Hirofumi Sato;近藤敦・塩原良和・鈴木江理子編著;Shuji Yamamoto
通讯作者:
Shuji Yamamoto
影响因子:
1.3
作者:
Kuwata Asuka;Toma Kenji;Kimura Shigeo S.;Tomita Sara;Shimoda Jiro;澤田和範;天野優;Hohto Bekki
通讯作者:
Hohto Bekki
DOI:
10.1515/crelle-2022-0040
发表时间:
2022
期刊:
Journal fur die reine und angewandte Mathematik (Crelles Journal)
影响因子:
--
作者:
Kenichi Bannai;Kei Hagihara;Kazuki Yamada;Shuji Yamamoto
通讯作者:
Shuji Yamamoto