Homemath.ATarXiv:2605.30285

On the equivariant $KU_G$ local sphere for finite abelian groups

math.AT2026-05v1license

Abstract

Given a finite abelian group GG and a Sylow pp-subgroup NpN_p, we prove that the KUG/pKU_G/p-local sphere spectrum is equivalent to the homotopy fixed points of a pp-complete KONpKO_{N_p}-module spectrum. Then we compute the Z\mathbb{Z}-graded homotopy Mackey functors of the KUGKU_G-local sphere spectrum. This result generalizes the computation of arXiv:2303.12271 for finite pp-groups, where pp is an odd prime. Finally, by comparing the Bousfield classes of KUG/pKU_G/p and GG-equivariant Morava KK-theory, we prove that the KUG/pKU_G/p-local sphere spectrum is equivalent to a wedge sum of equivariant Morava KK-theory localized sphere spectra, and describe the RO(G)RO(G)-graded homotopy Mackey functors of the KUG/pKU_G/p-local sphere spectrum.

Comments: 27 pages. Comments welcome

Cite

@article{arxiv.2605.30285,
  title  = {On the equivariant $KU_G$ local sphere for finite abelian groups},
  author = {Yingxin Li},
  journal= {arXiv preprint arXiv:2605.30285},
  year   = {2026}
}