Uniqueness of factorization for fusion-invariant representations

Abstract

Given a saturated fusion system F over a finite p-group S, we provide criteria to determine when uniqueness of factorization into irreducible F -invariant representations holds. We use them to prove uniqueness of factorization when the order of S is at most p 3 . We also describe an example where the monoid of fusioninvariant representations is not even half-factorial. Finally, we find other examples of fusion systems where this monoid is not factorial using GAP.