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 …

A category of kernels for equivariant factorizations and its implications for Hodge theory

M Ballard, D Favero, L Katzarkov - Publications mathématiques de l'IHÉS, 2014 - Springer
We provide a factorization model for the continuous internal Hom, in the homotopy category
of k-linear dg-categories, between dg-categories of equivariant factorizations. This motivates …

Equivalence of the derived category of a variety with a singularity category

MU Isik - International Mathematics Research Notices, 2013 - ieeexplore.ieee.org
Equivalence of the Derived Category of a Variety with a Singularity Category Page 1 M. Umut
Isik (2013) “Equivalence of Derived Category and Singularity Category,” International …

Bogomolov–Tian–Todorov theorems for Landau–Ginzburg models

L Katzarkov, M Kontsevich, T Pantev - Journal of differential …, 2017 - projecteuclid.org
In this paper we prove the smoothness of the moduli space of Landau–Ginzburg models. We
formulate and prove a Bogomolov–Tian–Todorov theorem for the deformations of Landau …

Differential graded Koszul duality: An introductory survey

L Positselski - Bulletin of the London Mathematical Society, 2023 - Wiley Online Library
This is an overview on derived nonhomogeneous Koszul duality over a field, mostly based
on the author's memoir L. Positselski, Memoirs of the American Math. Society 212 (2011) …

The tilting–cotilting correspondence

L Positselski, J Šťovíček - International Mathematics Research …, 2021 - academic.oup.com
To a big-tilting object in a complete, cocomplete abelian category with an injective
cogenerator we assign a big-cotilting object in a complete, cocomplete abelian category with …

Flat quasi-coherent sheaves as direct limits, and quasi-coherent cotorsion periodicity

L Positselski, J Stovicek - arXiv preprint arXiv:2212.09639, 2022 - arxiv.org
We show that every flat quasi-coherent sheaf on a quasi-compact quasi-separated scheme
is a directed colimit of locally countably presentable flat quasi-coherent sheaves. More …

Matrix factorizations and cohomological field theories

A Polishchuk, A Vaintrob - Journal für die reine und angewandte …, 2016 - degruyter.com
We give a purely algebraic construction of a cohomological field theory associated with a
quasihomogeneous isolated hypersurface singularity W and a subgroup G of the diagonal …

Coderived and contraderived categories of locally presentable abelian DG-categories

L Positselski, J Stovicek - arXiv preprint arXiv:2210.08237, 2022 - arxiv.org
The concept of an abelian DG-category, introduced by the first-named author in arXiv:
2110.08237, unites the notions of abelian categories and (curved) DG-modules in a …

Categorical and K-theoretic Hall algebras for quivers with potential

T Pădurariu - Journal of the Institute of Mathematics of Jussieu, 2023 - cambridge.org
Given a quiver with potential $(Q, W) $, Kontsevich–Soibelman constructed a cohomological
Hall algebra (CoHA) on the critical cohomology of the stack of representations of $(Q, W) …