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Kawamata showed the derived category of coherent sheaves on a smooth projective toric variety has a full exceptional collection consisting of sheaves. I was wondering if it is know whether every smooth projective toric variety has a full exceptional collection consisting of vector bundles?

For context, King conjectured that a smooth complete toric variety has a full strong exceptional collection consisting of line bundles. This turns out to be false. For example, Hill and Perling constructed example of smooth projective toric variety which does not have a full strong exceptional collection consisting of line bundles. It seems significant work has gone into producing additional counterexamples, as well as, proving the conjecture under additional hypotheses.

I am wondering whether a similar conjecture might be true if we drop the strong hypothesis and allow vector bundles instead of line bundles.

Update: It was recently pointed out to me that Kawamata's paper contains a slight misstatement and the the full exceptional collection does not consist of just sheaves, but instead complexes of sheaves. See Remark 7 in the published version of "Derived categories of toric varieties II".

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  • $\begingroup$ As far as I know the existence of such an exceptional collection is not known. For some negative results see also arXiv:1010.3755. $\endgroup$
    – Sasha
    Commented Jun 26, 2021 at 10:12

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