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

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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

\CF⋆J\cla∈\bDren≤0old(\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∈\bDren≤0new(\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.

References

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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