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We extend Deligne's weight filtration to the integer cohomology of complex analytic spaces (endowed with an equivalence class of compactifications). In general, the weight filtration that we obtain is not part of a mixed Hodge structure.…

Algebraic Geometry · Mathematics 2014-09-30 Joana Cirici , Francisco Guillén

We introduce the notion of tight homomorphism into a locally compact group with nonvanishing bounded cohomology and study these homomorphisms in detail when the target is a Lie group of Hermitian type. Tight homomorphisms between Lie groups…

Differential Geometry · Mathematics 2008-09-15 Marc Burger , Alessandra Iozzi , Anna Wienhard

Let $k$ be a perfect field of characteristic $p > 0$, $W_n = W_n(k)$. For separated $k$-schemes of finite type, we explain how rigid cohomology with compact supports can be computed as the cohomology of certain de Rham-Witt complexes with…

Algebraic Geometry · Mathematics 2012-05-22 Pierre Berthelot

We develop a theory of motives with compact support for logarithmic schemes over a field. Starting from the notion of finite logarithmic correspondences with compact support, we define the logarithmic motive with compact support analogous…

Algebraic Geometry · Mathematics 2024-03-26 Nikolai Opdan

We prove that for any field k of characteristic p>0, any separated scheme X of finite type over k, and any overconvergent F-isocrystal E over X, the rigid cohomology H^i(X, E) and rigid cohomology with compact supports H^i_c(X,E) are finite…

Algebraic Geometry · Mathematics 2007-05-23 Kiran S. Kedlaya

We introduce a notion of Poincar\'e duality for pairs of $\infty$-categories, extending Poincar\'e-Lefschetz duality for pairs of spaces. This categorical extension yields an efficient book-keeping device that affords, among other things, a…

Algebraic Topology · Mathematics 2025-10-24 Andrea Bianchi , Kaif Hilman , Dominik Kirstein , Christian Kremer

An proof of Poincare Duality with local coefficients and with compact support is provided. The proof does not require Sheaf Theory or anything equivalent and is thus more accessible for the general audience.

Algebraic Topology · Mathematics 2017-09-05 Fang Sun

This is a paper in a series that studies smooth relative Lie algebra homologies and cohomologies based on the theory of formal manifolds and formal Lie groups. In two previous papers, we develop the basic theory of formal manifolds,…

Functional Analysis · Mathematics 2024-08-09 Fulin Chen , Binyong Sun , Chuyun Wang

We define and study the rational analytic syntomification $X^{\mathrm{Syn}}$ of a partially proper rigid-analytic variety $X$ over $\mathbb{Q}_p$. We establish Poincar\'e duality and a theory of first Chern classes for the resulting…

Algebraic Geometry · Mathematics 2026-04-17 Maximilian Hauck

The geometry of the Lubin-Tate space of deformations of a formal group is studied via an \'etale, rigid analytic map from the deformation space to projective space. This leads to a simple description of the equivariant canonical bundle of…

Algebraic Topology · Mathematics 2023-12-04 Michael J. Hopkins , Benedict H. Gross

We investigate the problem of Poincar\'e duality for $L^p$ differential forms on bounded subanalytic submanifolds of $\mathbb{R}^n$ (not necessarily compact). We show that, when $p$ is sufficiently close to $1$ then the $L^p$ cohomology of…

Algebraic Geometry · Mathematics 2020-01-16 Guillaume Valette

Stabilization of manifolds by a product of spheres or a projective space is important in geometry. There has been considerable recent work that studies the homotopy theory of stabilization for connected manifolds. This paper generalizes…

Algebraic Topology · Mathematics 2025-04-15 Ruizhi Huang , Stephen Theriault

Let $G$ be a linear Lie group acting properly and isometrically on a $G$-spin$^c$ manifold $M$ with compact quotient. We show that Poincar\'e duality holds between $G$-equivariant $K$-theory of $M$, defined using finite-dimensional…

K-Theory and Homology · Mathematics 2024-09-02 Hao Guo , Varghese Mathai

A formal system called cologic is proposed for the study of compacta. A counterpart of countable model theory is developed for this system, and it is applied to model theory of the pseudo-arc.

Logic · Mathematics 2026-05-27 Kentarô Yamamoto

It is well known that the cup-product pairing on the complementary integral cohomology groups (modulo torsion) of a compact oriented manifold is unimodular. We prove a similar result for the $\ell$-adic cohomology groups of smooth algebraic…

Algebraic Geometry · Mathematics 2021-07-06 Yuri G. Zarhin

We investigate $p$-adic cohomologies of log rigid analytic varieties over a $p$-adic field. For a log rigid analytic variety $X$ defined over a discretely valued field, we compute the Kummer pro-\'etale cohomology of…

Number Theory · Mathematics 2025-06-19 Xinyu Shao

This article constructs Von Neumann invariants for constructible complexes and coherent D-modules on compact complex manifolds, generalizing the work of the author on coherent L 2-cohomology. We formulate a conjectural generalization of…

Algebraic Geometry · Mathematics 2022-03-15 Philippe Eyssidieux

We discuss the variations of mixed Hodge structure for cohomology with compact support of quasi-projective simple normal crossing pairs. We show that they are graded polarizable admissible variations of mixed Hodge structure. Then we prove…

Algebraic Geometry · Mathematics 2014-03-18 Osamu Fujino , Taro Fujisawa

We construct the $\Lambda$-adic crystalline and Dieudonn\'e analogues of Hida's ordinary $\Lambda$-adic \'etale cohomology, and employ integral $p$-adic Hodge theory to prove $\Lambda$-adic comparison isomorphisms between these cohomologies…

Number Theory · Mathematics 2019-02-20 Bryden Cais

The aim of this paper is to explain how to get a complex of smooth representations out of the dual vector space to a smooth representation of a p-adic Lie group, in natural characteristic. The construction does not depend on any…

Category Theory · Mathematics 2020-02-20 Leonid Positselski