The semi-orthogonal decomposition conjecture for gaps in Orlov spectra

Let XX be a smooth algebraic variety, and let

A1,,An\left\langle \mathcal A_1,\ldots,\mathcal A_n\right\rangle

be a semi-orthogonal decomposition of Db(cohX)\operatorname{D}^{\operatorname{b}}(\operatorname{coh} X). A gap conjecture for semi-orthogonal decompositions. The length of any gap in the spectrum of Db(cohX)\operatorname{D}^{\operatorname{b}}(\operatorname{coh} X) is at most the minimum of the maximal Rouquier dimension amongst the Ai\mathcal A_i and the maximal gap amongst the Ai\mathcal A_i. This is proposed after a theorem giving an upper bound on gaps from generators of semi-orthogonal components; the conjecture remains purely conjectural in the source.

Sources & referencesView supporting material

Primary source

Matthew Ballard, David Favero and Ludmil Katzarkov, “Orlov spectra: bounds and gaps”, arXiv:1012.0864 (2013).

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