Multiplicative groups avoiding a fixed group

We know that any finite abelian group G appears as a subgroup of infinitely many multiplicative groups [Formula: see text] (the abelian groups of size [Formula: see text] that are the multiplicative groups of units in the rings [Formula: see text]). It seems to be less well appreciated that G appears as a subgroup of almost all multiplicative groups [Formula: see text]. We exhibit an asymptotic formula for the counting function of those integers whose multiplicative group fails to contain a copy of G, for all finite abelian groups G (other than the trivial one-element group).

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Publication Details

Journal
International Journal of Number Theory
Published
2025-02-07
DOI
https://doi.org/10.1142/s1793042125500691
Citations
1
Primary Topic
Finite Group Theory Research
Type
article
Field-Weighted Citation Impact
5.33
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article

Multiplicative groups avoiding a fixed group

Greg Martin, Matthias Hannesson
1 citations
International Journal of Number Theory
Finite Group Theory Research
5.33
article

Multiplicative groups avoiding a fixed group

Greg Martin, Matthias Hannesson
article en
1 citations

Abstract

We know that any finite abelian group G appears as a subgroup of infinitely many multiplicative groups [Formula: see text] (the abelian groups of size [Formula: see text] that are the multiplicative groups of units in the rings [Formula: see text]). It seems to be less well appreciated that G appears as a subgroup of almost all multiplicative groups [Formula: see text]. We exhibit an asymptotic formula for the counting function of those integers whose multiplicative group fails to contain a copy of G, for all finite abelian groups G (other than the trivial one-element group).

International Journal of Number TheoryVol. 21(06)
University of British Columbia (CA), Vancouver Island University (CA)
Openalex Percentile: Top 11%
Finite Group Theory Research
5.33
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