Resolutions of toric subvarieties by line bundles and applications

A Hanlon, J Hicks, O Lazarev - Forum of Mathematics, Pi, 2024 - cambridge.org
Given any toric subvariety Y of a smooth toric variety X of codimension k, we construct a
length k resolution of under the map of toric Frobenius. The resolutions are built from a …

Variation of geometric invariant theory quotients and derived categories

M Ballard, D Favero, L Katzarkov - Journal für die reine und …, 2019 - degruyter.com
We study the relationship between derived categories of factorizations on gauged Landau–
Ginzburg models related by variations of the linearization in Geometric Invariant Theory …

Variation of geometric invariant theory quotients and derived categories

M Ballard, D Favero, L Katzarkov - arXiv preprint arXiv:1203.6643, 2012 - arxiv.org
We study the relationship between derived categories of factorizations on gauged Landau-
Ginzburg models related by variations of the linearization in Geometric Invariant Theory …

A short resolution of the diagonal for smooth projective toric varieties of Picard rank 2

MK Brown, M Sayrafi - Algebra & Number Theory, 2024 - msp.org
Given a smooth projective toric variety X of Picard rank 2, we resolve the diagonal sheaf on
X× X by a linear complex of length dim⁡ X consisting of finite direct sums of line bundles. As …

Descent conditions for generation in derived categories

P Lank - Journal of Pure and Applied Algebra, 2024 - Elsevier
This work establishes a condition that determines when strong generation in the bounded
derived category of a Noetherian J-2 scheme is preserved by the derived pushforward of a …

Strong generation & (co) ghost index for module categories

P Lank - arXiv preprint arXiv:2307.13675, 2023 - arxiv.org
This work is concerned with both strong generation and (co) ghost index in the module
category of a commutative noetherian ring. A sufficiency criterion is established for such …

Orlov spectra: bounds and gaps

M Ballard, D Favero, L Katzarkov - Inventiones mathematicae, 2012 - Springer
The Orlov spectrum is a new invariant of a triangulated category. It was introduced by D.
Orlov, building on work of A. Bondal-M. Van den Bergh and R. Rouquier. The supremum of …

Three notions of dimension for triangulated categories

A Elagin, VA Lunts - Journal of Algebra, 2021 - Elsevier
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Rouquier dimension is Krull dimension for normal toric varieties

D Favero, J Huang - European Journal of Mathematics, 2023 - Springer
We prove that for any normal toric variety, the Rouquier dimension of its bounded derived
category of coherent sheaves is equal to its Krull dimension. Our proof uses the coherent …

A note on generation and descent for derived categories of noncommutative schemes

A Bhaduri, S Dey, P Lank - arXiv preprint arXiv:2312.02840, 2023 - arxiv.org
This work demonstrates classical generation is preserved by the derived pushforward along
the canonical morphism of a noncommutative scheme to its underlying scheme. There are …