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 …

Descent and generation for noncommutative coherent algebras over schemes

T De Deyn, P Lank, KM Rahul - arXiv preprint arXiv:2410.01785, 2024 - arxiv.org
Our work investigates a form of descent, in the fppf and h topologies, for generation of
triangulated categories obtained from noncommutative coherent algebras over schemes. In …

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 …

Approximation by perfect complexes detects Rouquier dimension

P Lank, N Olander - arXiv preprint arXiv:2401.10146, 2024 - arxiv.org
This work explores bounds on the Rouquier dimension in the bounded derived category of
coherent sheaves on Noetherian schemes. By utilizing approximations, we exhibit that …

Approximability and Rouquier dimension for noncommuative algebras over schemes

T De Deyn, P Lank, KM Rahul - arXiv preprint arXiv:2408.04561, 2024 - arxiv.org
This work is concerned with approximability (\{a} la Neeman) and Rouquier dimension for
triangulated categories associated to noncommutative algebras over schemes. Amongst …

D\'{e} vissage for generation in derived categories

S Dey, P Lank - arXiv preprint arXiv:2401.13661, 2024 - arxiv.org
This work exhibits that the essential image of the derived pushforward along a proper
surjective morphism of Noetherian schemes generates the targets derived category of …

Closedness of the singular locus and generation for derived categories

S Dey, P Lank - arXiv preprint arXiv:2403.19564, 2024 - arxiv.org
This work is concerned with a relationship regarding the closedness of the singular locus of
a Noetherian scheme and existence of classical generators in its category of coherent …

Triangulated characterizations of singularities

P Lank, S Venkatesh - arXiv preprint arXiv:2405.04389, 2024 - arxiv.org
This work presents a range of triangulated characterizations for important classes of
singularities such as derived splinters, rational singularities, and Du Bois singularities. We …

Derived characterizations for rational pairs\{a} la Schwede-Takagi and Koll\'{a} r-Kov\'{a} cs

P Lank, P McDonald, S Venkatesh - arXiv preprint arXiv:2501.02783, 2025 - arxiv.org
This short note establishes derived characterizations for notions of rational pairs\{a} la
Schwede-Takagi and Koll\'{a} r-Kov\'{a} cs. We use a concept of generation in triangulated …

Homological properties of the relative Frobenius morphism

PM McDonald - arXiv preprint arXiv:2401.01880, 2024 - arxiv.org
This work concerns maps of commutative noetherian local rings containing a field of positive
characteristic. Given such a map $\varphi $ of finite flat dimension, the results relate …