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On tiny zero-sum sequences over finite abelian groups
2022
Colloquium Mathematicum
Let G be an additive finite abelian group. Let S = g1 •. . .•g l be a sequence over G, and k(S) = ord(g1) −1 + • • • + ord(g l ) −1 be its cross number. Let t(G) (resp. η(G)) be the smallest integer t such that every sequence of t elements, repetition allowed, from G has a non-empty zero-sum subsequence when G is cyclic, and for any integer r ≥ 3 there are infinitely many groups G of rank r such that t(G) > η(G). Girard (2012) conjectured that t(G) = η(G) for all finite abelian groups of rank
doi:10.4064/cm8607-9-2021
fatcat:trcooyexo5fxbitrjccjiudv2y