New paper in Journal of Algebra: p-bifree biset functors
Olcay Coşkun and Deniz Yılmaz (Bilkent University) have a new paper published in the Journal of Algebra, 704 (2026), 352–382.
The paper introduces and studies the category of p-bifree biset functors — a new framework that lies naturally between classical biset functors and diagonal p-permutation functors, serving as a bridge between them. The simple p-bifree biset functors are classified, and the composition factors of several representation-theoretic functors are computed in the p-bifree setting, including the Burnside ring functor, the Brauer character ring functor, and the ordinary character ring functor.