blocks

finite groups

category of finite $G$-sets

diagrams of $G$-sets

category of Mackey functors

category of modules

path algebras

quiver with relations

composition factors

Cartan matrices

decomposition matrices

Burnside rings

projective Mackey functors

orthogonal idempotents

$p$-perfect subgroups

vertices

sources

Green correspondents

$p$-groups

indecomposable projective Mackey functors

source modules

Hecke algebras

restriction

corestriction

group cohomology

finite representation type

Brauer trees