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Q-Gorenstein toric contact manifolds provide an interesting class of examples of contact manifolds with torsion first Chern class. They are completely determined by certain rational convex polytopes, called toric diagrams, and arise both as…

Symplectic Geometry · Mathematics 2023-06-16 Miguel Abreu , Leonardo Macarini , Miguel Moreira

We compute rational equivariant Chow rings with respect to a torus of quiver moduli spaces. We derive a presentation in terms of generators and relations, use torus localization to identify it as a subring of the Chow ring of the fixed…

Algebraic Geometry · Mathematics 2020-10-01 Hans Franzen

We study a class of smooth torus manifolds whose orbit space has the combinatorial structure of a simple polytope with holes. We construct moment angle manifolds for such polytopes with holes and use them to prove that the associated torus…

Symplectic Geometry · Mathematics 2024-12-05 Mainak Poddar , Soumen Sarkar

Logarithmic representations of the bordism category are considered as a framework for capturing a class of additive invariants characterising Reidemeister torsions.

Algebraic Topology · Mathematics 2016-02-02 Simon Scott

Torus manifolds are topological generalization of smooth projective toric manifolds. We compute the rational cohomology ring of a class of smooth locally standard torus manifolds whose orbit space is a connected sum of simple polytopes.

Algebraic Topology · Mathematics 2018-12-10 Soumen Sarkar , Donald Stanley

We use filtrations of the tangent bundle of a manifold starting with an integrable subbundle to define transverse symbols to the corresponding foliation, define a condition of transversally Rockland and prove that transversally Rockland…

Differential Geometry · Mathematics 2025-03-13 Clément Cren

Given a GKM$_3$ action of a torus $K$ on a manifold $M$ with GKM graph $\Gamma$, we show that for any extension of $\Gamma$ to an abstract GKM graph the corresponding restriction map in equivariant graph cohomology is surjective. While the…

Algebraic Topology · Mathematics 2026-04-16 Oliver Goertsches , Grigory Solomadin

We calculate geometric and homotopical (or stable) bordism rings associated to semi-free $S^1$ actions on complex manifolds, giving explicit generators for the geometric theory. The classification of semi-free actions with isolated fixed…

Algebraic Topology · Mathematics 2007-05-23 Dev P. Sinha

We compute the oriented cobordism group of fold maps of 4-manifolds into the space with all the possible restrictions (and also with no restriction) to the singular fibers. We also give geometric invariants which describe completely the…

Geometric Topology · Mathematics 2008-05-12 Boldizsar Kalmar

We introduce a general framework allowing the systematic study of random manifolds. In order to do so, we will put ourselves in a more general context than usual by allowing the underlying probability space to be non commutative. We…

Dynamical Systems · Mathematics 2018-03-19 Miguel Bermudez

We show that certain isomorphisms of (twisted) KR-groups that underlie T-dualities of torus orientifold string theories have purely algebraic analogues in terms of algebraic K-theory of real varieties and equivalences of derived categories…

Algebraic Geometry · Mathematics 2016-12-22 Jonathan Rosenberg

Consider the Hamiltonian action of a torus on a compact twisted generalized complex manifold $M$. We first observe that Kirwan injectivity and surjectivity hold for ordinary equivariant cohomology in this setting. Then we prove that these…

Differential Geometry · Mathematics 2015-05-13 Thomas Baird , Yi Lin

We give a sufficient criterion for the Chow or algebraic bordism groups of an algebraic stack, localized at a set of Chern classes of line bundles, to be concentrated in some closed substack. This is a vast generalization of the torus…

Algebraic Geometry · Mathematics 2025-04-22 Dhyan Aranha , Adeel A. Khan , Alexei Latyntsev , Hyeonjun Park , Charanya Ravi

A 2-torus manifold is a closed smooth manifold of dimension $n$ with an effective action of a 2-torus group $(\Z_2)^n$ of rank $n$, and it is said to be locally standard if it is locally isomorphic to a faithful representation of $(\Z_2)^n$…

Geometric Topology · Mathematics 2009-09-18 Zhi Lü , Mikiya Masuda

A torus manifold $M$ is a $2n$-dimensional orientable manifold with an effective action of an $n$-dimensional torus such that $M^T\neq \emptyset$. In this paper we discuss the classification of torus manifolds which admit an invariant…

Differential Geometry · Mathematics 2015-11-05 Michael Wiemeler

We define equivariant homology theories using bordism of stratifolds with a G-action, where G is a discrete group. Stratifolds are a generalization of smooth manifolds which were introduced by Kreck. He defines homology theories using…

Algebraic Topology · Mathematics 2007-05-23 Julia Weber

We compute all the Chern, Milnor and Pontryagin numbers for canonical toric manifolds associated with abstract simplicial complexes and the Stiefel-Whitney numbers for their real counterparts. Applications include combinatorial…

Algebraic Topology · Mathematics 2026-04-03 Vladimir Grujić , Ivan Limonchenko

We give a short introduction to the theory of twisted Alexander polynomials of a 3--manifold associated to a representation of its fundamental group. We summarize their formal properties and we explain their relationship to twisted…

Geometric Topology · Mathematics 2010-02-05 Stefan Friedl , Stefano Vidussi

In this article, we start to recall the inversion formula for the convolution with the Box spline. The equivariant cohomology and the equivariant K-theory with respect to a compact torus G of various spaces associated to a linear action of…

Differential Geometry · Mathematics 2015-03-17 C. De Concini , C. Procesi , M. Vergne

Some properties of non-orientable 3-manifolds are shown. The semi-group of cobordism of immersions of surfaces in such manifolds is computed and proven actually to be a group. Explicit invariants are provided.

Geometric Topology · Mathematics 2007-05-23 Rosa Gini
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