The mixed-multiplicity bound for full ideals

Let (R,m)(R,{\mathfrak m}) be a regular local ring of dimension dd, and let tit_i be defined by

(n+1)(n+d1)=i=1dtindi.(n+1)\cdots(n+d-1)=\sum_{i=1}^{d}t_i n^{d-i}.

An ideal is m{\mathfrak m}-full if it has the corresponding maximal-ideal fullness property; every integrally closed ideal of positive height is m{\mathfrak m}-full. The mixed-multiplicity bound for full ideals. For every m{\mathfrak m}-full (in particular, integrally closed) m{\mathfrak m}-primary ideal II,

i=1dtiei(mI)(d1)!μ(I),\sum_{i=1}^{d}t_i\operatorname{e}_i({\mathfrak m}\mid I)\leq(d-1)!\mu(I),

where μ(I)\mu(I) is the minimal number of generators of II. This conjecture seeks to strengthen the known Dao–Smirnov bound for the first mixed multiplicity. The source does not resolve it in general.

Sources & referencesView supporting material

Primary source

Craig Huneke, Ilya Smirnov and Javid Validashti, “A generalization of an inequality of Lech relating multiplicity and colength”, arXiv:1711.06951 (2018).

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