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Given a hypersurface $i \colon X \hookrightarrow \widetilde{P}^n$ in a weighted projective space, we compute the intersection form on the second cohomology $H^2(X, \mathbb{Z})^{\otimes n-1} \to \mathbb{Z}$ for the purpose of identifying…

代数几何 · 数学 2025-06-05 Anna-Maria Raukh

A cohomological study is made of an equivariant map betwen the configuration space of n points in space and the flag manifold of U(n).

代数拓扑 · 数学 2007-05-23 Michael Atiyah

We compute the equivariant homology and cohomology of projective spaces with integer coefficients. More precisely, in the case of cyclic groups, we show that the cellular filtration of the projective space $P(k\rho )$, of lines inside…

代数拓扑 · 数学 2025-09-24 Samik Basu , Pinka Dey , Aparajita Karmakar

We consider quotients of complete flag manifolds in Cn and Rn by an action of the symmetric group on n objects. We compute their cohomology with field coefficients of any characteristic. Specifically, we show that these topological spaces…

代数拓扑 · 数学 2023-12-20 Lorenzo Guerra , Santanil Jana

In 2001, S. Barannikov showed that the Frobenius manifold coming from the quantum cohomology of the complex projective space is isomorphic to the Frobenius manifold attached to some Laurent polynomial. The purpose of this thesis is to…

代数几何 · 数学 2007-05-23 Etienne Mann

Recently, the homology and cohomology of non-k-overlapping discs, or, equivalently, no k-equal subspaces of Euclidean space, were calculated by Dobrinskaya and Turchin. We calculate the homology and cohomology of two classes of more general…

代数拓扑 · 数学 2016-12-09 Nicholas Kosar

In [1] we defined a new kind of space called 'structured space' which locally resembles, near each of its points, some algebraic structure. We noted in the conclusion of the cited paper that the maps $f_s$ and $h$, which are of great…

代数拓扑 · 数学 2020-04-27 Manuel Norman

We compute the p-adic geometric pro-\'etale cohomology of the affine space (in any dimension). This cohomogy is non-zero, contrary to the \'etale cohomology, and can be described by means of differential forms.

代数几何 · 数学 2018-08-28 Pierre Colmez , Wieslawa Niziol

We give a concrete method to explicitly compute the rational cohomology of the unordered configuration spaces of connected, oriented, closed, even-dimensional manifolds of finite type which we have implemented in Sage [S+09]. As an…

代数拓扑 · 数学 2016-12-20 Megan Maguire , with Appendix by Matthew Christie , Derek Francour

Cohomology spaces of the Poisson superalgebra realized on smooth Grassmann-valued functions with compact support on $R^{2n}$ ($C^{2n}) are investigated under suitable continuity restrictions on cochains. The first and second cohomology…

高能物理 - 理论 · 物理学 2007-05-23 S. E. Konstein , A. G. Smirnov , I. V. Tyutin

In this paper we compute the cohomology of the Fano varieties of $k$-planes in the smooth complete intersection of two quadrics in $\mathbb{P}^{2g+1}$, using Springer theory for symmetric spaces.

代数几何 · 数学 2020-06-23 Tsao-Hsien Chen , Kari Vilonen , Ting Xue

We develop a technique for calculating the cohomology groups of spaces of complex parametric knots in ${\mathbb C}^k$, $k \geq 3$, and carry out these calculations to obtain these groups of low dimensions.

代数拓扑 · 数学 2023-10-16 V. A. Vassiliev

We define a relative version of tiling cohomology for the purpose of comparing the topology of tiling spaces when one is a factor of the other. We illustrate this with examples, and outline a method for computing the cohomology of tiling…

动力系统 · 数学 2018-07-10 Marcy Barge , Lorenzo Sadun

Hexagon relations are algebraic realizations of four-dimensional Pachner moves. `Constant' -- not depending on a 4-simplex in a triangulation of a 4-manifold -- hexagon relations are proposed, and their polynomial-valued cohomology is…

量子代数 · 数学 2019-04-16 Igor G. Korepanov

We compute the Betti numbers and describe the cohomology algebras of the ordered and unordered configuration spaces of three points in complex projective spaces, including the infinite dimensional case. We also compute these invariants for…

几何拓扑 · 数学 2012-12-07 Samia Ashraf , Barbu Berceanu

The purpose of this article is to relate coarse cohomology of metric spaces with a more computable cohomology. We introduce a notion of boundedly supported cohomology and prove that coarse cohomology of many spaces are isomorphic to the…

度量几何 · 数学 2024-01-05 Arka Banerjee

In this paper the rigid cohomology of Drinfeld's upper half space over a finite field is computed in two ways. The first method proceeds by computation of the rigid cohomology of the complement of Drinfeld's upper half space in the ambient…

数论 · 数学 2018-01-09 Mark Kuschkowitz

In this paper, we attempt to determine the quantum cohomology of projective bundles over the projective space P^n. In contrast to the previous examples, the relevant moduli spaces in our case frequently do not have expected dimensions. It…

代数几何 · 数学 2008-02-03 Zhenbo Qin , Yongbin Ruan

In this article, we pursue the study begun in \cite{Lup02} on the cohomology of rationally elliptic coformal spaces. Consequently, we complete, for such spaces, the proof of Lupton's conjecture and deduce Hilali's.

代数拓扑 · 数学 2025-01-23 Youssef Rami

We compute the equivariant cohomology of complex projective spaces associated to finite-dimensional representations of $C_2$, using ordinary cohomology graded on representations of the fundamental groupoid, with coefficients in the Burnside…

代数拓扑 · 数学 2022-05-17 Steven R. Costenoble , Thomas Hudson , Sean Tilson
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