Vertex of a representation

In mathematical finite group theory, the vertex of a representation of a finite group is a subgroup associated to it, that has a special representation called a source. Vertices and sources were introduced by Green (1959)

References

• Green, J. A. (1958 59), "On the indecomposable representations of a finite group", Mathematische Zeitschrift 70: 430–445, doi:10.1007/BF01558601, ISSN 0025-5874, MR0131454