Miller–Vissuet's MSTD–MDTS conjecture for dihedral groups

Let n3n\geq 3 be an integer, and let

D2n:=r,s:rn=s2=1, r1s=srD_{2n}:=\langle r,s:r^n=s^2=1,\ r^{-1}s=sr\rangle

be the dihedral group of order 2n2n. An MSTD subset is a subset with more distinct pairwise sums than distinct pairwise differences, while an MDTS subset has more distinct pairwise differences than distinct pairwise sums. Miller–Vissuet's conjecture. There are more MSTD subsets of D2nD_{2n} than MDTS subsets of D2nD_{2n}. This conjecture concerns the prevalence of sum-dominant and difference-dominant subsets in finite non-abelian groups and was proposed on the basis of theoretical and computational evidence; its status is not resolved in the supplied source.

Sources & referencesView supporting material

Primary source

Sagar Mandal and Neetu, “Exact and Asymptotic Counts of MSTD, MDTS, and Balanced Sets in Dicyclic Groups”, arXiv:2602.09073 (2026).

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