Tannenbaum's zero-sum partition conjecture for Abelian groups

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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 m−1m-1, with mi≥2m_i\geq 2 for every i∈[1,∣R∣/2]i\in[1,|R|/2] and mi≥3m_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

∑s∈Sis=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.

References

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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