Toric degeneration conjecture for Mori dream spaces

From papers

Let XX be a Mori dream space, and let YY_\bullet be a flag for which the global semigroup ΓY(X)\Gamma_{Y_\bullet}(X) is defined. The Cox ring of XX is denoted by Cox(X)\operatorname{Cox}(X), and Spec(Cox(X))\operatorname{Spec}(\operatorname{Cox}(X)) is its spectrum. Toric degeneration conjecture. Finite generation of ΓY(X)\Gamma_{Y_\bullet}(X) induces a degeneration of

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

which is compatible with the toric degenerations of ΓY(D)\Gamma_{Y_\bullet}(D) considered in the cited work. This would relate the global semigroup of a Mori dream space to toric degenerations of its Cox construction, extending the analogous phenomenon for semigroups associated with divisors.

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Primary source

Georg Merz, David Schmitz and Henrik Seppänen, “On the Mori theory and Newton-Okounkov bodies of Bott-Samelson varieties”, arXiv:1709.09910 (2017).

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