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We study the moduli stacks of real vector bundles of fixed rank and degree on a type I real algebraic curve and determine its mod 2 cohomology algebra in terms of characteristic classes.

Algebraic Geometry · Mathematics 2026-05-29 Luca Dal Molin , Frank Neumann

We study the spaces of stable real and quaternionic vector bundles on a real algebraic curve. The basic relationship is established with unitary representations of an extension Z/2 by the fundamental group. By comparison with the space of…

Algebraic Geometry · Mathematics 2009-04-03 Indranil Biswas , Johannes Huisman , Jacques C. Hurtubise

Complex Chern-Simons bundles are line bundles with connection, originating in the study of quantization of moduli spaces of flat connections with complex gauge groups. In this paper we introduce and study these bundles in the families…

Algebraic Geometry · Mathematics 2022-03-17 Dennis Eriksson , Gerard Freixas i Montplet , Richard A. Wentworth

In this paper we count the number of isomorphism classes of geometrically indecomposable quasi-parabolic structures of a given type on a given vector bundle on the projective line over a finite field. We give a conjectural cohomological…

Algebraic Geometry · Mathematics 2016-09-19 Emmanuel Letellier

We describe the singular cohomology ring, the K-ring of complex vector bundles, the Chow ring, and the Grothendieck ring of coherent sheaves of the total space of the fibre bundle with base space an irreducible nonsingular complete…

Algebraic Geometry · Mathematics 2007-05-23 P. Sankaran , V. Uma

We introduce the notion of locally trivial quantum principal bundles. The base space and total space are compact quantum spaces (unital $C^{\star}$-algebras), the structure group is a compact matrix quantum group. We prove that a quantum…

High Energy Physics - Theory · Physics 2007-05-23 R. J. Budzynski , W. Kondracki

Using the theory of quantized equivariant vector bundles over compact coadjoint orbits we determine the Chern characters of all noncommutative line bundles over the fuzzy sphere with regard to its derivation based differential calculus. The…

Mathematical Physics · Physics 2009-11-07 Harald Grosse , Christian W. Rupp , Alexander Strohmaier

Let $C$ be an elliptic curve, $w\in C$, and let $S\subset C$ be a finite subset of cardinality at least $3$. We prove a Torelli type theorem for the moduli space of rank two parabolic vector bundles with determinant line bundle $\mathcal…

Algebraic Geometry · Mathematics 2020-08-20 Thiago Fassarella , Luana Justo

Several important cases of vector bundles with extra structure (such as Higgs bundles and triples) may be regarded as examples of twisted representations of a finite quiver in the category of sheaves of modules on a variety/manifold/ringed…

Algebraic Geometry · Mathematics 2007-05-23 Peter B. Gothen , Alastair D. King

The leitmotiv of this review is noncommutative principal U(1)-bundles and associated line bundles. In the first part I give a brief introduction to Hopf-Galois theory and its applications, from field extensions to principal group actions. I…

Quantum Algebra · Mathematics 2015-10-27 Francesco D'Andrea

Differential calculi are obtained for quantum homogeneous spaces by extending Woronowicz' approach to the present context. Representation theoretical properties of the differential calculi are investigated. Connections on quantum…

Quantum Algebra · Mathematics 2007-05-23 R. B. Zhang

A horospherical variety is a normal algebraic variety where a connected reductive algebraic group acts with an open orbit isomorphic to a torus bundle over a flag variety. In this article we study the cohomology of line bundles on complete…

Algebraic Geometry · Mathematics 2019-03-29 Benoît Dejoncheere , B. Narasimha Chary

We completely determine cohomology groups of sections of homogeneous line bundles over a toroidal group.

Complex Variables · Mathematics 2016-09-16 Yukitaka Abe

We provide a classification of type AI topological quantum systems in dimension d=1,2,3,4 which is based on the equivariant homotopy properties of "Real" vector bundles. This allows us to produce a fine classification able to take care also…

Mathematical Physics · Physics 2014-08-26 Giuseppe De Nittis , Kiyonori Gomi

Let A be a finite abelian group. We set up an algebraic framework for studying A-equivariant complex-orientable cohomology theories in terms of a suitable kind of equivariant formal groups. We compute the equivariant cohomology of many…

Algebraic Topology · Mathematics 2008-11-14 Neil P. Strickland

We exhaustively classify topological equivariant complex vector bundles over two-torus under a compact Lie group (not necessarily effective) action. It is shown that inequivariant Chern classes and isotropy representations at (at most) six…

Group Theory · Mathematics 2010-07-13 Min Kyu Kim

There are theories of coverings of $C^*$-algebras which can be included into a following list: coverings of commutative $C^*$-algebras, coverings of $C^*$-algebras of groupoids and foliations, coverings of noncommutative tori, the double…

Operator Algebras · Mathematics 2024-07-19 Petr Ivankov

In this paper, we study the cohomology of vector bundles on projective space defined as kernels or cokernels of general maps $V_1 \to V_2$, where the $V_i$ are direct sums of line bundles or certain exceptional bundles. We prove an…

Algebraic Geometry · Mathematics 2022-04-22 Izzet Coskun , Jack Huizenga , Geoffrey Smith

We study the cohomology groups of tautological bundles on Quot schemes over the projective line, which parametrize rank $r$ quotients of a vector bundle $V$ on $\mathbb{P}^1$. Our main result is an analogue of the Borel--Weil--Bott theorem…

Algebraic Geometry · Mathematics 2025-11-06 Ajay Gautam , Feiyang Lin , Shubham Sinha

We give an algorithmic description of the action of the Chern classes of tautological bundles on the cohomology of Hilbert schemes of points on surfaces within the framework of Nakajima's oscillator algebra. This leads to an identification…

Algebraic Geometry · Mathematics 2009-10-31 Manfred Lehn