The reduction-number conjecture for asymptotic fullness

Let (R,m)(R, \mathfrak{m}) be a Cohen–Macaulay local ring with infinite residue field and

dimR2.\operatorname{dim} R\geq 2.

For a minimal reduction II of m\mathfrak{m}, let n3(I)n_3(I) denote the asymptotic fullness invariant defined in the paper, and let rI(m)\operatorname{r}_I(\mathfrak{m}) be the reduction number of m\mathfrak{m} with respect to II. The reduction-number conjecture. For every minimal reduction II of m\mathfrak{m},

n3(I)=rI(m).n_3(I)=\operatorname{r}_I(\mathfrak{m}).

The conjecture is motivated by the authors' computations and by the dimension-one case, where the corresponding formula is independent of the chosen minimal reduction. It is proposed because no example was known violating the related inequality s(m)rI(m)+1s(\mathfrak{m})\leq \operatorname{r}_I(\mathfrak{m})+1; the source provides no resolution in dimensions at least two.

Sources & referencesView supporting material

Primary source

Cleto B. Miranda-Neto and Douglas S. Queiroz, “Dao's question on the asymptotic behaviour of fullness”, arXiv:2308.03997 (2023).

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