Schur indices in GAP: wedderga 4.7+
Allen Herman · Journal of Software for Algebra and Geometry · 2024
We describe algorithms and their implementations that calculate local and global Schur indices of ordinary irreducible characters of finite groups and cyclotomic algebras over abelian number fields.Side benefits include functions for cyclotomic reciprocity calculations and for calculating the defect group associated with an ordinary irreducible character of a finite group.These functions are available in GAP via the package wedderga, versions 4.7 and higher.