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The theory of indices of Morse--Bott vector fields on a manifold is constructed and the famous localization problem for the transfer map is solved on its base in the present paper. As a consequence, we obtained addition theorems for the…

Algebraic Topology · Mathematics 2007-05-23 V. M. Buchstaber , K. E. Feldman

This work presents some results about Wick polynomials of a vector field renormalization in locally covariant algebraic quantum field theory in curved spacetime. General vector fields are pictured as sections of natural vector bundles over…

Mathematical Physics · Physics 2019-03-01 Igor Khavkine , Alberto Melati , Valter Moretti

We introduce the notion of cofoliation on a stack. A cofoliation is a change of the differentiable structure which amounts to giving a full representable smooth epimorphism. Cofoliations are uniquely determined by their associated Lie…

Algebraic Geometry · Mathematics 2007-05-23 Kai Behrend

In this article, we present a novel theory of locally semialgebraic superspaces along with Nash supermanifolds. By adapting Batchelor's theorem to our framework, we show that all locally semialgebraic superspaces and affine Nash…

Algebraic Geometry · Mathematics 2023-10-27 Mahir Bilen Can

The topological classification of gerbes, as principal bundles with the structure group the projective unitary group of a complex Hilbert space, over a topological space $H$ is given by the third cohomology $\text{H}^3(H, \Bbb Z)$. When $H$…

Mathematical Physics · Physics 2025-12-24 Jouko Mickelsson , Stefan Wagner

In very rough terms, the main theorem is that the set, which consists of semistable vector bundles with trivial rational Chern classes and nontrivial kth cohomology on a smooth complex projective variety, is a degeneration of a union of…

alg-geom · Mathematics 2008-02-03 Donu Arapura

In this paper we study the homology and cohomology of confguration spaces of two distinct particles on a graph. Our main tool is intersection theory for cycles in graphs. We obtain an explicit description of the cohomology algebra of the…

Algebraic Topology · Mathematics 2009-03-13 Kathryn Barnett , Michael Farber

A new generalization of Grassmannians, called {\nu}-grassmannians, and a canonical super vector bundle over this new space, say {\Gamma}, are introduced. Then, constructing a Gauss supermap of a super vector bundle, the universal property…

Differential Geometry · Mathematics 2018-02-16 Mohammad Javad Afshari , Saad Varsaie

Using techniques of A^1-homotopy theory, we produce motivic lifts of elements in classical homotopy groups of spheres; these lifts provide polynomial maps of spheres and allow us to construct ``low rank'' algebraic vector bundles on…

Algebraic Geometry · Mathematics 2025-04-11 Aravind Asok , Jean Fasel , Michael J. Hopkins

We give an explicit formula for the zeroth $\mathbb{A}^1$-homology sheaf of a smooth proper variety. We also provide a simple proof of a theorem of Kahn-Sujatha which describes hom sets in the birational localization of the category of…

Algebraic Geometry · Mathematics 2022-05-26 Junnosuke Koizumi

We establish a relative version of the abstract "affine representability" theorem in ${\mathbb A}^1$--homotopy theory from Part I of this paper. We then prove some ${\mathbb A}^1$--invariance statements for generically trivial torsors under…

Algebraic Geometry · Mathematics 2018-03-16 Aravind Asok , Marc Hoyois , Matthias Wendt

We study the space of smooth marked hypersurfaces in a given linear system. Specifically, we prove a homology h-principle to compare it with a space of sections of an appropriate jet bundle. Using rational models, we compute its rational…

Algebraic Topology · Mathematics 2023-12-07 Alexis Aumonier , Ronno Das

We introduce a cohomology, called extendable cohomology, for abstract complex singular varieties based on suitable differential forms. Beside a study of the general properties of such a cohomology, we show that, given a complex vector…

Complex Variables · Mathematics 2008-12-04 Carlo Perrone

We show that the Atiyah-Hirzebruch K-theory of spaces admits a canonical generalization for stratified spaces. For this we study algebraic constructions on stratified vector bundles. In particular the tangent bundle of a stratified manifold…

K-Theory and Homology · Mathematics 2007-05-23 Hans-Joachim Baues , Davide L. Ferrario

In this note, we generalize the linear duality between vector subbundles (or equivalently quotient bundles) of dual vector bundles to coherent quotients $V \twoheadrightarrow \mathscr{L}$ considered in arXiv:1811.12525, in the framework of…

Algebraic Geometry · Mathematics 2018-12-17 Qingyuan Jiang

We construct a large class of gauge theories with extended supersymmetry on four-dimensional manifolds with a Killing vector field and isolated fixed points. We extend previous results limited to super Yang-Mills theory to general…

High Energy Physics - Theory · Physics 2020-10-28 Guido Festuccia , Anastasios Gorantis , Antonio Pittelli , Konstantina Polydorou , Lorenzo Ruggeri

We study the cohomology theory of sheaf complexes for open embeddings of topological spaces and related subjects. The theory is situated in the intersection of the general Cech theory and the theory of derived categories. That is to say, on…

Algebraic Topology · Mathematics 2018-10-16 Tatsuo Suwa

The Dolbeault resolution of the sheaf of holomorphic vector fields $Lie$ on a complex manifold $M$ relates $Lie$ to a sheaf of differential graded Lie algebras, known as the Fr\"olicher-Nijenhuis algebra $g$. We establish - following B. L.…

Mathematical Physics · Physics 2011-08-31 Friedrich Wagemann

We established the associativity of the quantum cohomologies of homogeneous varieties by using degeneration method in algebraic geometry.

alg-geom · Mathematics 2008-02-03 Jun Li , Gang Tian

The aim of this short note is to develop a (co)homology theory for topological spaces together with the specialisation preorder. A known way to construct such a (co)homology is to define a partial order on the topological space starting…

Algebraic Topology · Mathematics 2020-04-23 Manuel Norman