Equivariant Z/ℓ_-modules for the cyclic group C2

Permutation modules and cohomological singularity

“…The reader can verify that already for G = C p cyclic, the Z 2 -graded ring ⊕ (s,q)∈Z 2 Hom(1, u ⊗q p [s]) is not noetherian. See for instance [DHM24] for p = 2. However, negatively twisted elements tend to be nilpotent.…”