activity
20192024
collaborators

5 papers

math.RT2024

Multiplicity-free representations and coisotropic actions of certain nilpotent Lie groups over quasi-symmetric Siegel domains

Koichi Arashi

We study multiplicity-free representations of Lie groups over a quasi-symmetric Siegel domain, with a focus on certain two-step nilpotent Lie groups. We provide necessary and suffi…

math.RT2023

Coherent state representations of the holomorphic automorphism group of a quasi-symmetric Siegel domain of type III

Koichi Arashi

The aim of this paper is to study the classification of generic coherent state representations of a Lie group and its connection to the structure theory of Kähler algebras. The gro…

math.RT2022

Multiplicity-free representations of certain nilpotent Lie groups over Siegel domains of the second kind

Koichi Arashi

We investigate the multiplicity-freeness property for the holomorphic multiplier representations of affine transformation groups of a Siegel domain of the second kind. We deal with…

math.RT2020

Coherent state representations of the holomorphic automorphism group of the tube domain over the dual of the Vinberg cone

K. Arashi

We classify all irreducible coherent state representations of the holomorphic automorphism group of the tube domain over the dual of the Vinberg cone.

math.RT2019

Holomorphic multiplier representations for bounded homogeneous domains

K. Arashi

In this paper, we study the unitarizations in the spaces of holomorphic sections of equivariant holomorphic line bundles over a bounded homogeneous domain under the action of a con…