Shumyatsky's conjecture on finite-rank profinite groups with bounded centralizers
Shumyatsky's conjecture on finite-rank profinite groups with bounded centralizers
Let be a profinite group. A profinite group has finite rank if there is an integer such that every finitely generated closed subgroup can be generated by at most elements. For each nontrivial element , write for its centralizer.
Shumyatsky's conjecture. If has finite rank for every nontrivial , and is not a pro- group, then has finite rank.
This conjecture concerns the extent to which restrictions on centralizers control the global generation rank of a profinite group. The paper's abstract states a stronger bounded-rank result, but the supplied text does not explicitly state whether this conjecture is thereby resolved.
Sources & referencesView supporting material
Primary source
Pavel Shumyatsky, “On profinite groups in which centralizers have bounded rank”, arXiv:2004.05977 (2022).
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