Cisto's Generalized Wilf conjecture for N^p-semigroups

Let SS be an Np\mathbb{N}^p-semigroup, let H(S)\mathcal{H}(S) denote its set of holes, and write xNphx\leq_{\mathbb{N}^p}h for the coordinatewise order. Define

ν(S)={xSxNph for some hH(S)},\nu(S)=\sharp\{x\in S\mid x\leq_{\mathbb{N}^p}h\text{ for some }h\in\mathcal{H}(S)\}, γ(S)={xNpxNph for some hH(S)}.\gamma(S)=\sharp\{x\in\mathbb{N}^p\mid x\leq_{\mathbb{N}^p}h\text{ for some }h\in\mathcal{H}(S)\}.

Cisto's Generalized Wilf conjecture. The inequality

ν(S)e(S)pγ(S)\nu(S)e(S)\geq p\,\gamma(S)

should hold.

This generalizes Wilf-type inequalities to Np\mathbb{N}^p-semigroups; the source gives no resolution status.

Sources & referencesView supporting material

Primary source

J. C. Rosales, R. Tapia-Ramos and A. Vigneron-Tenorio, “A computational approach to the study of finite-complement submonids of an affine cone”, arXiv:2409.06376 (2024).

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