Hille–Perling's standard augmentation conjecture for strong exceptional collections

Let XX be a rational surface. A standard augmentation is a toric system obtained from a toric system on a Hirzebruch surface by successive blow-ups and the corresponding augmentation operations. Two line bundles are completely orthogonal when the relevant Ext groups vanish in both directions; a permutation of a collection means reordering within such mutually orthogonal blocks. Hille–Perling's conjecture. Every full strong exceptional collection of line bundles on XX corresponds, up to permutation of completely orthogonal bundles, to a standard augmentation. A positive answer would describe all full exceptional collections of line bundles on rational surfaces, but the supplied text does not establish the conjecture.

Sources & referencesView supporting material

Primary source

Alexey Elagin, Junyan Xu and Shizhuo Zhang, “On cyclic strong exceptional collections of line bundles on surfaces”, arXiv:2007.02140 (2020).

Additional references

2 papers in this index state this conjecture (2017–2020). The statement above is taken from the most recent of them; the others are arXiv:1710.03972.

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