Shigeo Koshitani

activity

20092026

p

-blocks with small numbers of characters

8 citations · 31 across the 22 of their papers we have counts for

collaborators

Showing 2018Show all

2 papers · 1 filter

math.RT2018

Splendid Morita equivalences for principal blocks with generalised quaternion defect groups

Shigeo Koshitani, Caroline Lassueur

We prove that splendid Morita equivalences between principal blocks of finite groups with dihedral Sylow $2$ -subgroups realised by Scott modules can be lifted to splendid Morita eq…

math.RT2018

On theorems of Brauer-Nesbitt and Brandt for characterizations of small block algebras

Shigeo Koshitani, Taro Sakurai

In 1941, Brauer-Nesbitt established a characterization of a block with trivial defect group as a block $B$ with $k (B) = 1$ where $k (B)$ is the number of irreducible ordinary charac…