Fakhruddin's conjecture on the \mathfrak{sl}2 conformal block cone of \overline{M}{0,6}

Let Nef(M0,6)\operatorname{Nef}(\overline{M}_{0,6}) be the nef cone. A Fakhruddin ray is an extremal ray spanned either by D(sl2,1,(1,1,1,1,1,1))D(\mathfrak{sl}_2,1,(1,1,1,1,1,1)) or by one of the 127 pullbacks from the GIT quotients (P1)n/ ⁣/LSL2(\mathbb{P}^1)^n /\!/_{L} \operatorname{SL}_2 studied in the source. A Fakhruddin orbit is an S6S_6-orbit of Fakhruddin rays, and the Fakhruddin cone is the subcone of Nef(M0,6)\operatorname{Nef}(\overline{M}_{0,6}) spanned by Fakhruddin rays. Fakhruddin's conjecture. The cone generated by all sl2\mathfrak{sl}_2 conformal block divisors for all levels is equal to the Fakhruddin cone. This conjecture identifies all such conformal block divisors with the specified extremal-ray cone in the nef cone of M0,6\overline{M}_{0,6}.

Sources & referencesView supporting material

Primary source

David Swinarski, “sl_2 conformal block divisors and the nef cone of M_0,n”, arXiv:1107.5331 (2011).

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