Bound conjecture for the minimum Wilf number of a gap

Let Γ\Gamma be a numerical semigroup, let WΓ(e(Γ))W_{\Gamma}(e(\Gamma)) be its Wilf number, and for each gap gg let W(g)W(g) denote the Wilf number associated with that gap. Then

Bound conjecture. For any semigroup Γ\Gamma,

min(W(g))WΓ(e(Γ)).\min(W(g))\geq -W_{\Gamma}(e(\Gamma)).

This conjecture proposes a lower bound for the Wilf number of a gap and is motivated by numerical examples and the study of Wilf functions. The paper presents it as open and as a possible route toward Wilf's conjecture.

Sources & referencesView supporting material

Primary source

Patricio Almirón and Julio José Moyano-Fernández, “An extension of the Wilf conjecture to semimodules over a numerical semigroup”, arXiv:2012.01358 (2021).

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