Tannenbaum's zero-sum partition conjecture for Abelian groups

Let Γ\Gamma be a finite Abelian group of order mm, and let I(Γ)I(\Gamma) be its set of involutions. Assume I(Γ)>1|I(\Gamma)|>1, and put

R=Γ(I(Γ){0}).R=\Gamma\setminus\bigl(I(\Gamma)\cup\{0\}\bigr).

Tannenbaum's zero-sum partition conjecture. For every positive integer tt and every integer partition {mi}i=1t\{m_i\}_{i=1}^t of m1m-1, with mi2m_i\geq 2 for every i[1,R/2]i\in[1,|R|/2] and mi3m_i\geq 3 for every i[R/2+1,t]i\in[|R|/2+1,t], there is a subset partition {Si}i=1t\{S_i\}_{i=1}^t of Γ=Γ{0}\Gamma^*=\Gamma\setminus\{0\} such that Si=mi|S_i|=m_i and

sSis=0\sum_{s\in S_i}s=0

for every i[1,t]i\in[1,t]. Cichacz and Suchan disproved the conjecture in general; it holds in the cases covered by the cited 22-ZSPP and elementary 22-group theorems.

Sources & referencesView supporting material

Primary source

Sylwia Cichacz, “Disjoint zero-sum subsets in Abelian groups and its application – survey”, arXiv:2410.22245 (2024).

Additional references

3 papers in this index state this conjecture (2021–2024). The statement above is taken from the most recent of them; the others are arXiv:2203.09395, arXiv:2111.05394.

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