The new t-structure detection conjecture for affine-flag D-modules

Let \bDren(\fD(\FlGaff)\critmod)\bD_{\mathrm{ren}}(\fD(\Fl^{\operatorname{aff}}_G)_\crit\operatorname{mod}) carry the old and new t-structures, and let J\claJ_\cla be the convolution objects indexed by \cla\cLambda\cla\in\cLambda. New t-structure detection conjecture. If \CF\bDren(\fD(\FlGaff)\critmod)\CF\in\bD_{\mathrm{ren}}(\fD(\Fl^{\operatorname{aff}}_G)_\crit\operatorname{mod}) satisfies

\CFJ\cla\bDren0old(\fD(\FlGaff)\critmod)\CF\star J_\cla\in\bD_{\mathrm{ren}}^{\leq 0_{\mathrm{old}}}(\fD(\Fl^{\operatorname{aff}}_G)_\crit\operatorname{mod})

for every \cla\cLambda\cla\in\cLambda, then

\CF\bDren0new(\fD(\FlGaff)\critmod).\CF\in\bD_{\mathrm{ren}}^{\leq 0_{\mathrm{new}}}(\fD(\Fl^{\operatorname{aff}}_G)_\crit\operatorname{mod}).

The assertion concerns whether the defining convolution test detects the nonpositive part of the new t-structure; the source presents it as one of several unresolved basic questions.

Sources & referencesView supporting material

Primary source

Edward Frenkel and Dennis Gaitsgory, “D-modules on the affine flag variety and representations of affine Kac-Moody algebras”, arXiv:0712.0788 (2009).

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