Cohomology on the centric orbit category of a fusion system

Autorzy

Dane publikacji

  • DOI: 10.4064/fm240612-2-2

  • Tom 269

  • Zeszyt 2

  • Czasopismo: Fundamenta Mathematicae

  • Strony: 187-199

  • Data publikacji online: 12.03.2025

Liczba wyświetleń: 0

Liczba pobrań: 0

Abstrakt

We study the higher derived limits of mod $p$ cohomology on the centric orbit category of a saturated fusion system on a finite $p$-group. It is an open problem whether all such higher limits vanish. This is known in many cases, including for fusion systems realized by a finite group and for many classes of fusion systems which are not so realized. We prove that the higher limits of $H^j$ vanish provided $j \leq p-2$, by showing that the same is true for the contravariant part of a simple Mackey composition factor of $H^j$ under the same conditions.