Cooper–Embree–Ha–Ha–Hoefel lower-bound conjecture for monomial ideals

Let II be a monomial ideal, and let big-height(I)\operatorname{big-height}(I) denote the maximum of the heights of the associated primes PAss(I)P\in\operatorname{Ass}(I). Write e=big-height(I)e=\operatorname{big-height}(I), and let α(I)\alpha(I) and α^(I)\widehat\alpha(I) denote the initial degree and Waldschmidt constant of II, respectively. Cooper–Embree–Ha–Ha–Hoefel's conjecture.

α^(I)α(I)+e1e.\widehat\alpha(I)\geq\frac{\alpha(I)+e-1}{e}.

This is a Chudnovsky-like lower bound for the Waldschmidt constant of a monomial ideal, extending the analogous proposed bound for ideals of points in projective space. The supplied text does not indicate whether the conjecture has been resolved.

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Primary source

Cristiano Bocci, Susan Cooper, Elena Guardo, Brian Harbourne, Mike Janssen, Uwe Nagel, Alexandra Seceleanu, Adam Van Tuyl and Thanh Vu, “The Waldschmidt constant for squarefree monomial ideals”, arXiv:1508.00477 (2016).

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