Cattani–Cox–Dickenstein's Codimension One conjecture for toric varieties

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Let XX be a complete simplicial toric variety with Cox ring B(Σ)B(\Sigma), and let F0,…,Fn∈B(Σ)F_0,\ldots,F_n\in B(\Sigma) be homogeneous polynomials that do not vanish simultaneously on XX. Let β0\beta_0 be the anticanonical class of XX, and define the critical degree

ω=∑ideg⁡Fi−β0.\omega=\sum_i\deg F_i-\beta_0.

Cattani–Cox–Dickenstein's Codimension One conjecture. The critical-degree component of the quotient by the FiF_i should satisfy

dim⁡C(Sω/(F0,…,Fn)ω)=1.\dim_{\mathbb C}\left(S_\omega/(F_0,\ldots,F_n)_\omega\right)=1.

This conjecture concerns the top-degree piece of a quotient in the Cox-ring setting for complete simplicial toric varieties. The supplied text does not indicate whether the conjecture has been resolved.

References

Primary source

Ugo Bruzzo, Rodrigo Gondim, Rafael Holanda and William D. Montoya, “Cox-Gorenstein algebras”, arXiv:2407.17811 (2025).

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