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Given an action of a finite group $G$ on the derived category of a smooth projective variety $X$ we relate the fixed loci of the induced $G$-action on moduli spaces of stable objects in $D^b(\mathrm{Coh}(X))$ with moduli spaces of stable…

Algebraic Geometry · Mathematics 2020-11-23 Thorsten Beckmann , Georg Oberdieck

Given a smooth totally nonholonomic distribution on a smooth manifold, we construct a singular distribution capturing essential abnormal lifts which is locally generated by vector fields with controlled divergence. Then, as an application,…

Differential Geometry · Mathematics 2025-06-09 A Belotto da Silva , A Parusiński , L Rifford

We propose a 'geometric Chevalley-Warning' conjecture, that is a motivic extension of the Chevalley-Warning theorem in number theory. It is equivalent to a particular case of a recent conjecture of F. Brown and O.Schnetz. In this paper, we…

Algebraic Geometry · Mathematics 2017-10-19 Xia Liao

We provide descriptions of the derived categories of degree $d$ hypersurface fibrations which generalize a result of Kuznetsov for quadric fibrations and give a relative version of a well-known theorem of Orlov. Using a local generator and…

Algebraic Geometry · Mathematics 2014-09-22 Matthew Ballard , Dragos Deliu , David Favero , M. Umut Isik , Ludmil Katzarkov

We establish a valuative version of Grothendieck's section conjecture for curves over p-adic local fields. The image of every section is contained in the decomposition subgroup of a valuation which prolongs the p-adic valuation to the…

Algebraic Geometry · Mathematics 2011-11-08 Florian Pop , Jakob Stix

We consider alternating gradient descent (AGD) with fixed step size applied to the asymmetric matrix factorization objective. We show that, for a rank-$r$ matrix $\mathbf{A} \in \mathbb{R}^{m \times n}$, $T = C…

Machine Learning · Computer Science 2024-02-09 Rachel Ward , Tamara G. Kolda

We define a theory of Goodwillie calculus for enriched functors from finite pointed simplicial G-sets to symmetric G-spectra, where G is a finite group. We extend a notion of G-linearity suggested by Blumberg to define stably excisive and…

Algebraic Topology · Mathematics 2019-02-20 Emanuele Dotto

A diagram consisting of differential graded (dg for short) categories and dg functors is formulated in this paper as a colax functor $X$ from a small category $I$ to the 2-category $\mathbf{k}$-dgCat of small dg categories, dg functors and…

Representation Theory · Mathematics 2026-01-26 Hideto Asashiba , Shengyong Pan

Let F be a non-archimedean local field with residue characteristic p. Let l be a prime number different from p. Let G be a connected reductive group which is split, semi-simple, and simply connected. On the one hand, we describe the…

Representation Theory · Mathematics 2025-04-22 Chenji Fu

Recently in symplectic geometry there arose an interest in bounding various functionals on spaces of matrices. It appears that Grothendieck's theorems about factorization are a useful tool for proving such bounds. In this note we present…

Symplectic Geometry · Mathematics 2020-05-19 Efim Gluskin , Shira Tanny

Mott noted a one-to-one correspondence between saturated multiplicatively closed subsets of a domain D and directed convex subgroups of the group of divisibility D. With this, we construct a functor between inclusions into saturated…

Commutative Algebra · Mathematics 2016-12-15 Jim Coykendall , Brandon Goodell

Let $G$ be a connected reductive algebraic group. Let $\mathcal{E}\rightarrow \mathcal{B}$ be a principal $G\times G$-bundle and $X$ be a regular compactification of $G$. We describe the Grothendieck ring of the associated fibre bundle…

Algebraic Geometry · Mathematics 2020-08-25 V. Uma

We first propose a generalization of the image conjecture [Z3] for the commuting differential operators related with classical orthogonal polynomials. We then show that the non-trivial case of this generalized image conjecture is equivalent…

Complex Variables · Mathematics 2010-04-06 Wenhua Zhao

Using morphic cohomology, we produce a sequence of conjectures, called morphic conjectures, which terminates at the Grothendieck standard conjecture A. A refinement of Hodge structures is given, and with the assumption of morphic…

Algebraic Geometry · Mathematics 2007-10-03 Jyh-Haur Teh

For a cyclic group $G$ acting on a smooth variety $X$ with only one character occurring in the $G$-equivariant decomposition of the normal bundle of the fixed point locus, we study the derived categories of the orbifold $[X/G]$ and the…

Algebraic Geometry · Mathematics 2017-09-13 Andreas Krug , David Ploog , Pawel Sosna

For any finite group G, we show that the 2-local G-equivariant stable homotopy category, indexed on a complete G-universe, has a unique equivariant model in the sense of Quillen model categories. This means that the suspension functor,…

Algebraic Topology · Mathematics 2016-09-21 Irakli Patchkoria

We observe that there is an equivalence between the singularity category of an affine complete intersection and the homotopy category of matrix factorizations over a related scheme. This relies in part on a theorem of Orlov. Using this…

Commutative Algebra · Mathematics 2012-05-14 Jesse Burke , Mark E. Walker

In this paper we establish a precise comparison between vanishing cycles and the singularity category of Landau-Ginzburg models over a complete discrete valuation ring. By using noncommutative motives, we first construct a motivic…

Algebraic Geometry · Mathematics 2020-04-17 A. Blanc , M. Robalo , B. Töen , G. Vezzosi

A landmark theorem of Orlov relates the singularity category of a graded Gorenstein algebra to the derived category of the associated noncommutative projective scheme. We generalize this theorem to the setting of differential graded…

Algebraic Geometry · Mathematics 2025-02-05 Michael K. Brown , Prashanth Sridhar

Let V be the space of 2x2x2 complex hypermatrices, endowed with the natural group action of GL=GL(2,C)^3. The category of GL-equivariant coherent D-modules on V is equivalent to the category of representations of a quiver with relations. In…

Commutative Algebra · Mathematics 2021-12-17 Michael Perlman
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