activity
20172022
collaborators

10 papers

math.NT2022

The Hodge Realization of the Polylogarithm and the Shintani Generating Class for Totally Real Fields

Kenichi Bannai, Hohto Bekki, Kei Hagihara +3

In this article, we construct the Hodge realization of the polylogarithm class in the equivariant Deligne-Beilinson cohomology of a certain algebraic torus associated to a totally…

math.AG2020

Poincaré duality for rigid analytic Hyodo--Kato theory

Veronika Ertl, Kazuki Yamada

The purpose of this paper is to establish Hyodo--Kato theory with compact support for semistable schemes through rigid analytic methods. To this end we introduce several types of l…

math.AG2020

Hyodo-Kato theory with syntomic coefficients

Kazuki Yamada

The purpose of this article is to establish theories concerning -adic analogues of Hodge cohomology and Deligne-Beilinson cohomology with coefficients in variations of mixed Hod…

math.NT2020

-adic Polylogarithms and -adic Hecke -functions for Totally Real Fields

Kenichi Bannai, Kei Hagihara, Kazuki Yamada +1

The purpose of this article is to newly define the -adic polylogarithm as an equivariant class in the cohomology of a certain infinite disjoint union of algebraic tori associate…

math.AG2020

The Hodge realization of the polylogarithm on the product of multiplicative groups

Kenichi Bannai, Kei Hagihara, Kazuki Yamada +1

The purpose of this article is to describe explicitly the polylogarithm class in absolute Hodge cohomology of a product of multiplicative groups, in terms of the Bloch-Wigner-Ramak…

math.NT2019

Canonical Equivariant Cohomology Classes Generating Zeta Values of Totally Real Fields

Kenichi Bannai, Kei Hagihara, Kazuki Yamada +1

It is known that the special values at nonpositive integers of a Dirichlet -function may be expressed using the generalized Bernoulli numbers, which are defined by a canonical g…