Finiteness conjecture for Cox rings of log Fano varieties

Let XX be a log Fano variety. Its Cox ring Cox(X)\mathrm{Cox}(X) is the ring graded by Pic(X)\mathrm{Pic}(X) associated with a basis of the Picard group as defined above.

Finiteness of Cox ring. The ring

Cox(X)\operatorname{Cox}(X)

is finitely generated.

Finite generation of the Cox ring implies finite generation of the cone of effective divisors and, via the torus action on the Cox ring, finite generation of the nef cone. The source presents this as a special case of a conjecture in the cited literature; no resolution status is supplied here.

Sources & referencesView supporting material

Primary source

Brendan Hassett and Yuri Tschinkel, “Universal torsors and Cox rings”, arXiv:math/0308182 (2003).

Additional references

2 papers in this index state this conjecture (2002–2003). The statement above is taken from the most recent of them; the others are arXiv:math/0203220.

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