The strong conciseness conjecture for profinite groups

Let w(x1,,xk)w(x_1,\dots,x_k) be a word in kk variables, and let GG be a profinite group. Write w{G}w\{G\} for the set of word-values of ww in GG, and w(G)=w{G}w(G)=\langle w\{G\}\rangle for the verbal subgroup. A word is strongly concise in GG if w{G}<20|w\{G\}|<2^{\aleph_0} implies that w(G)w(G) is finite. Strong conciseness conjecture. Every word is strongly concise in the class of profinite groups. This strengthens ordinary conciseness by replacing finiteness of the word-value set with cardinality strictly below the continuum; the supplied text does not state whether this conjecture has been resolved.

Sources & referencesView supporting material

Primary source

Andoni Zozaya, “Conciseness of compact R-analytic groups”, arXiv:2202.01266 (2023).

Additional references

3 papers in this index state this conjecture (2015–2022). The statement above is taken from the most recent of them; the others are arXiv:1907.01344, arXiv:1507.03362.

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