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We introduce a dynamical Mordell-Lang-type conjecture for coherent sheaves. When the sheaves are structure sheaves of closed subschemes, our conjecture becomes a statement about unlikely intersections. We prove an analogue of this…

Algebraic Geometry · Mathematics 2017-06-07 Jason P. Bell , Matthew Satriano , Susan J. Sierra

We give the description of the t-structure on the derived category of regular holonomic D-modules corresponding to the trivial t-structure on the derived category of constructible sheaves via Riemann-Hilbert correspondence. We give also the…

Algebraic Geometry · Mathematics 2015-12-22 Masaki Kashiwara

The aim of these notes is to generalize Laumon's construction [18] of automorphic sheaves corresponding to local systems on a smooth, projective curve $C$ to the case of local systems with indecomposable unipotent ramification at a finite…

Algebraic Geometry · Mathematics 2007-05-23 Jochen Heinloth

In this paper, we study the geometric invariant theory on algebraic spaces, and construct te moduli spaces of $\mathcal{H}$-semistable sheaves on projective Deligne-Mumford stacks over algebraic spaces $S$. We prove that this moduli space…

Algebraic Geometry · Mathematics 2021-01-05 Hao Sun

We explain the precise relationship between two module-theoretic descriptions of sheaves on an involutive quantale, namely the description via so-called Hilbert structures on modules and that via so-called principally generated modules. For…

Category Theory · Mathematics 2009-06-11 Hans Heymans , Isar Stubbe

In this paper, we construct an analogy of holonomy of connection to simplicial sets using A-infinity-categories. To construct it, we develop fiberwise integrals on simplicial sets and define an iterated integral on simplicial sets. It is an…

Algebraic Topology · Mathematics 2022-11-15 Ryohei Kageyama

We survey old and new results on the existence of moduli spaces of semistable coherent sheaves both in algebraic and in complex geometry.

Algebraic Geometry · Mathematics 2024-07-19 Mihai Pavel , Matei Toma

We introduce the category of b-analytic manifolds, a natural tool to define constructible sheaves and functions up to infinity. We study with some details the operations on these objects and also recall the Radon transform for constructible…

Algebraic Geometry · Mathematics 2023-02-21 Pierre Schapira

We prove that applying a projective functor to a holonomic simple module over a semi-simple finite dimensional complex Lie algebra produces a module that has an essential semi-simple submodule of finite length. This implies that holonomic…

Representation Theory · Mathematics 2024-01-29 Marco Mackaay , Volodymyr Mazorchuk , Vanessa Miemietz

As already observed by Gabriel, coherent sheaves on schemes obtained by gluing affine open subsets can be described by a simple gluing construction. An example due to Ferrand shows that this fails in general for pushouts along closed…

Algebraic Geometry · Mathematics 2015-05-19 Daniel Schäppi

In [arXiv:2109.13991], the author explained a relation between enhanced ind-sheaves and enhanced subanalytic sheaves. In this paper, we shall define C-constructability for enhanced subanalytic sheaves which was announced in…

Algebraic Geometry · Mathematics 2023-10-31 Yohei Ito

In this paper we prove restriction theorems for torsion-free sheaves that are (semi)stable with respect to the truncated Hilbert polynomial over a smooth projective variety. Our results apply in particular to Gieseker-semistable sheaves and…

Algebraic Geometry · Mathematics 2022-04-06 Mihai Pavel

We associate a t-structure to a family of objects in D(A), the derived category of a Grothendieck category A. Using general results on t-structures, we give a new proof of Rickard's theorem on equivalence of bounded derived categories of…

Representation Theory · Mathematics 2007-05-23 Leovigildo Alonso , Ana Jeremias , Ma. -Jose Souto

We prove a theorem on how a conclusion on homological dimension of a family of coherent sheaves over a scheme can be done from homological dimension of the restriction of this family to the reduction of the base.

Algebraic Geometry · Mathematics 2014-12-09 Nadezda V. Timofeeva

Let $X$ be a smooth proper scheme over an algebraically closed field $k$ in characteristic $p$. In this short note, by interpreting $\mathcal{D}_{X}$-modules as $F$-divided sheaves and establishing a cohomological boundedness property for…

Algebraic Geometry · Mathematics 2025-11-05 Xiaodong Yi

Sheaves of structures are useful to give constructions in universal algebra and model theory. We can describe their logical behavior in terms of Heyting-valued structures. In this paper, we first provide a systematic treatment of sheaves of…

Logic · Mathematics 2021-12-15 Hisashi Aratake

We prove irreducible components of moduli spaces of semistable representations of skewed-gentle algebras, and more generally, clannish algebras, are isomorphic to products of projective spaces. This is achieved by showing irreducible…

Representation Theory · Mathematics 2022-08-02 Cody Gilbert

We show that certain semistable sheaves on the projective plane with linear Hilbert polynomial are cokernels of semistable morphisms of decomposable sheaves.We exhibit certain locally closed subvarieties of moduli spaces of semistable…

Algebraic Geometry · Mathematics 2013-11-14 Mario Maican

Let $A$ be the $n$-th Weyl algebra over a field of characteristic zero, and $\varphi:A\rightarrow A$ an endomorphism with $S = \varphi(A)$. We prove that if $A$ is finitely generated as a left or right $S$-module, then $S = A$. The proof…

Algebraic Geometry · Mathematics 2024-02-20 Niels Lauritzen , Jesper Funch Thomsen

In constructive algebra one cannot in general decide the irreducibility of a polynomial over a field K. This poses some problems to showing the existence of the algebraic closure of K. We give a possible constructive interpretation of the…

Logic · Mathematics 2014-09-12 Bassel Mannaa , Thierry Coquand