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We study the topology of a class of proper submodules and some of its distinguished subclasses and call them structure spaces. We give several criteria for the quasi-compactness of these structure spaces. We study $T_0$ and $T_1$ separation…

Rings and Algebras · Mathematics 2023-04-18 Amartya Goswami

We use the action of the Bockstein homomorphism on the cohomology ring $H^*(X,\mathbb{Z}_2)$ of a finite-type CW-complex $X$ in order to define the resonance varieties of $X$ in characteristic 2. Much of the theory is done in the more…

Algebraic Topology · Mathematics 2023-11-20 Alexander I. Suciu

We study the local cohomology modules H^i_B(R) for a reduced monomial ideal B in a polynomial ring R=k[X_1,...,X_n]. We consider a grading on R which is coarser than the Z^n-grading such that each component of H^i_B(R) is finite dimensional…

Algebraic Geometry · Mathematics 2007-05-23 David Eisenbud , Mircea Mustata , Mike Stillman

In this paper we study homological dimensions of finitely generated modules over commutative Noetherian local rings, called reducing homological dimensions. We obtain new characterizations of Gorenstein and complete intersection local rings…

Commutative Algebra · Mathematics 2022-12-13 Olgur Celikbas , Souvik Dey , Toshinori Kobayashi , Hiroki Matsui

For an $\E$-ring spectrum $R$ and a map $f:X\to Pic(R)$ of spaces, the Thom spectrum $\T f$ is a comodule over $R\otimes\Si X$. In this parper we study the topological coHochschild homology of $R\otimes\Si X$ with coefficient $\T f$. More…

Algebraic Topology · Mathematics 2026-01-19 Jiaxi Zha

Modular forms appear in many facets of mathematics, and have played important roles in geometry, mathematical physics, number theory, representation theory, topology, and other areas. Around 1994, motivated by technical issues in homotopy…

Algebraic Topology · Mathematics 2007-05-23 Michael J. Hopkins

We present various approaches to J. Herzog's theory of generalized local cohomology and explore its main aspects, e.g., (non-)vanishing results as well as a general local duality theorem which extends, to a much broader class of rings,…

Commutative Algebra · Mathematics 2022-07-19 Thiago H. Freitas , Victor H. Jorge-Pérez , Cleto B. Miranda-Neto , Peter Schenzel

We describe how the result in [1] extends to prove the existence of a Serre type spectral sequence converging to the symplectic homology SH_*(M) of an exact Sub-Liouville domain M in a cotangent bundle T*N. We will define a notion of a…

Symplectic Geometry · Mathematics 2012-08-30 Thomas Kragh

In this note, we give an elementary proof of the result given by Schenzel that there are functorial isomorphisms between local cohomology groups and \v{C}ech cohomology groups, by using weakly proregular sequences. In [Sch03], he used…

Commutative Algebra · Mathematics 2022-04-07 Ryoya Ando

We consider the change-of-rings spectral sequence as it applies to Hochschild cohomology, obtaining a description of the differentials on the first page which relates it to the multiplicative stucture on cohomology. Using this information,…

K-Theory and Homology · Mathematics 2007-07-24 Mariano Suárez-Alvarez

We introduce a dual Zariski topology on the spectrum of fully coprime $R$-submodules of a given duo module $M$ over an associative (not necessarily commutative) ring $R$. This topology is defined in a way dual to that of defining the…

Rings and Algebras · Mathematics 2010-07-29 Jawad Y. Abuhlail

In this paper we describe a machinery for homological calculations of representations of FI_G, and use it to develop a local cohomology theory over any commutative Noetherian ring. As an application, we show that the depth introduced by the…

Representation Theory · Mathematics 2016-10-11 Liping Li , Eric Ramos

Thurston obtained a classification of individual surface homeomorphisms via the dynamics of the corresponding mapping class elements on Teichm\"uller space. In this paper we present certain extended versions of this, first, to random…

Dynamical Systems · Mathematics 2017-05-17 Anders Karlsson

We connect the homotopy type of simplicial moduli spaces of algebraic structures to the cohomology of their deformation complexes. Then we prove that under several assumptions, mapping spaces of algebras over a monad in an appropriate…

Algebraic Topology · Mathematics 2015-07-20 Sinan Yalin

Let $(R,\fm)$ be a local ring and $(-)^{\vee}$ denote the Matlis duality functor. We investigate the relationship between Foxby equivalence and local duality through generalized local cohomology modules. Assume that $R$ possesses a…

Commutative Algebra · Mathematics 2012-01-11 Fatemeh Mohammadi Aghjeh Mashhad , Kamran Divaani-Aazar

We compute the local cohomology modules H_Y^(X,O_X) in the case when X is the complex vector space of n x n symmetric, respectively skew-symmetric matrices, and Y is the closure of the GL-orbit consisting of matrices of any fixed rank, for…

Commutative Algebra · Mathematics 2017-08-15 Claudiu Raicu , Jerzy Weyman

This is the second paper in a series of three papers aiming to study cohomology of group theoretic Dehn fillings. In the present paper, we derive a spectral sequence for Cohen-Lyndon triples which can be thought of as a refined version of…

Group Theory · Mathematics 2021-01-19 Bin Sun

In this paper we study Morse homology and cohomology with local coefficients, i.e. "twisted" Morse homology and cohomology, on closed finite dimensional smooth manifolds. We prove a Morse theoretic version of Eilenberg's Theorem, and we…

Algebraic Topology · Mathematics 2025-01-16 Augustin Banyaga , David Hurtubise , Peter Spaeth

We investigate under what conditions holomorphic forms defined on the regular locus of a reduced complex space extend to holomorphic (or logarithmic) forms on a resolution of singularities. We give a simple necessary and sufficient…

Algebraic Geometry · Mathematics 2021-02-02 Stefan Kebekus , Christian Schnell

We prove the local hard Lefschetz theorem and local Hodge-Riemann bilinear relations for Soergel bimodules. Using results of Soergel and K\"ubel one may deduce an algebraic proof of the Jantzen conjectures. We observe that the Jantzen…

Representation Theory · Mathematics 2016-09-15 Geordie Williamson