English

A pro-$p$ group with full normal Hausdorff spectra

Group Theory 2020-05-05 v2

Abstract

For each odd prime pp, we produce a 22-generated pro-pp group GG whose normal Hausdorff spectra hspecS(G)={hdimGS(H)HcG} \mathrm{hspec}_{\trianglelefteq}^{\mathcal{S}}(G) = \{ \mathrm{hdim}_{G}^{\mathcal{S}}(H)\mid H\trianglelefteq_\mathrm{c} G \} with respect to five standard filtration series S\mathcal{S} - namely the lower pp-series, the dimension subgroup series, the pp-power series, the iterated pp-power series and the Frattini series - are all equal to the full unit interval [0,1][0,1]. Here hdimGS ⁣:{XXG}[0,1]\mathrm{hdim}_G^{\mathcal{S}} \colon \{ X\mid X \subseteq G \} \to[0,1] denotes the Hausdorff dimension function associated to the natural translation-invariant metric induced by the filtration series S\mathcal{S}.

Keywords

Cite

@article{arxiv.2004.02846,
  title  = {A pro-$p$ group with full normal Hausdorff spectra},
  author = {Iker de las Heras and Benjamin Klopsch},
  journal= {arXiv preprint arXiv:2004.02846},
  year   = {2020}
}

Comments

13 pages, minor corrections

R2 v1 2026-06-23T14:41:31.332Z