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Taking a groupoid C*-algebra approach to the study of the quantum complex projective spaces $\mathbb{P}^{n}\left( \mathcal{T}\right) $ constructed from the multipullback quantum spheres introduced by Hajac and collaborators, we analyze the…

Operator Algebras · Mathematics 2018-02-13 Albert Jeu-Liang Sheu

We give a complete classification of isomorphism classes of finitely generated projective modules, or equivalently, unitary equivalence classes of projections, over the C*-algebra $C\left( \mathbb{S}_{q}^{2n+1}\right) $ of the quantum…

Operator Algebras · Mathematics 2019-05-27 Albert Jeu-Liang Sheu

We generalize to quantum weighted projective spaces in any dimension previous results of us on K-theory and K-homology of quantum projective spaces `tout court'. For a class of such spaces, we explicitly construct families of Fredholm…

Quantum Algebra · Mathematics 2015-09-01 Francesco D'Andrea , Giovanni Landi

The $K_0$-group of the C*-algebra of multipullback quantum complex projective plane is known to be $\mathbb{Z}^3$, with one generator given by the C*-algebra itself, one given by the section module of the noncommutative (dual) tautological…

K-Theory and Homology · Mathematics 2026-04-21 Carla Farsi , Piotr M. Hajac , Tomasz Maszczyk , Bartosz Zielinski

The algebraic approach to bundles in non-commutative geometry and the definition of quantum real weighted projective spaces are reviewed. Principal U(1)-bundles over quantum real weighted projective spaces are constructed. As the spaces in…

Quantum Algebra · Mathematics 2012-07-11 Tomasz Brzeziński , Simon A. Fairfax

This paper continues the study of holomorphic semistable principal G-bundles over an elliptic curve. In this paper, the moduli space of all such bundles is constructed by considering deformations of a minimally unstable G-bundle. The set of…

Algebraic Geometry · Mathematics 2007-05-23 Robert Friedman , John W. Morgan

We study the quantisation of complex, finite-dimensional, compact, classical phase spaces C, by explicitly constructing Hilbert-space vector bundles over C. We find that these vector bundles split as the direct sum of two holomorphic vector…

High Energy Physics - Theory · Physics 2007-05-23 J. M. Isidro

We show that isomorphism classes $[\mathcal{A}]$ of flat $q\times q$ matrix bundles $\mathcal{A}$ (or projectively flat rank-$q$ complex vector bundles $\mathcal{E}$) on a pro-torus $\mathbb{T}$ are in bijective correspondence with the…

Algebraic Topology · Mathematics 2025-09-23 Alexandru Chirvasitu

We equip the multi-pullback $C^*$-algebra $C(S^5_H)$ of a noncommutative-deformation of the 5-sphere with a free $U(1)$-action, and show that its fixed-point subalgebra is isomorphic with the $C^*$-algebra of the multi-pullback quantum…

K-Theory and Homology · Mathematics 2015-12-31 Piotr M. Hajac , Jan Rudnik

We study the classification of affine holomorphic bundles over a compact complex manifold $X$ in general, and we apply the general theory to the case $X=\mathbb{P}^1_\mathbb{C}$. We study the moduli space of framed, non-degenerate rank 2…

Algebraic Geometry · Mathematics 2025-01-23 Naoufal Bouchareb

We give a unifying description of all inequivalent vector bundles over the 2-dimensional sphere $S^2$ by constructing suitable global projectors $p$ via equivariant maps. Each projector determines the projective module of finite type of…

Mathematical Physics · Physics 2015-06-26 Giovanni Landi

Over the quantum weighted 1-dimensional complex projective spaces, called quantum teardrops, the quantum line bundles associated with the quantum principal U(1)-bundles introduced and studied by Brzezinski and Fairfax are explicitly…

Quantum Algebra · Mathematics 2014-03-25 Albert Jeu-Liang Sheu

We introduce in non-coordinate presentation the notions of a quantum algebra and of a quantum module over such an algebra. Then we give the definition of a projective quantum module and of a free quantum module, the latter as a particular…

Operator Algebras · Mathematics 2017-05-23 A. Ya. Helemskii

For any simple Lie algebra, a positive integer, and tuple of compatible weights, the conformal blocks bundle is a globally generated vector bundle on the moduli space of pointed rational curves. We classify all $S_n$-invariant vector…

Algebraic Geometry · Mathematics 2014-04-24 Anna Kazanova

Recently an algebra of smooth valuations was attached to any smooth manifold. Roughly put, a smooth valuation is finitely additive measure on compact submanifolds with corners which satisfies some extra properties. In this note we initiate…

Metric Geometry · Mathematics 2011-04-06 Semyon Alesker

We extend our previous results on generalized Dixmier-Douady theory to graded $C^*$-algebras, as means for explicit computations of the invariants arising for bundles of ungraded $C^*$-algebras. For a strongly self-absorbing $C^*$-algebra…

Operator Algebras · Mathematics 2026-01-08 Marius Dadarlat , Ulrich Pennig

We show how the C*-algebras of quantum complex projective spaces (standard or nonstandard) are related to groupoids.

Operator Algebras · Mathematics 2007-05-23 Albert Jeu-Liang Sheu

In this paper, complex vector bundles of rank $r$ over $8$-dimensional spin$^{c}$ manifolds are classified in terms of the Chern classes of the complex vector bundles and the cohomology ring of the manifolds, where $r = 3$ or $4$. As an…

Algebraic Topology · Mathematics 2020-02-18 Huijun Yang

Let $\mathscr{V}\mathrm{ect}_n$ be the moduli stack of vector bundles of rank $n$ on schemes. We prove that, if $E$ is a Zariski sheaf of ring spectra which is equipped with finite quasi-smooth transfers and satisfies the projective bundle…

Algebraic Geometry · Mathematics 2023-03-06 Toni Annala , Ryomei Iwasa

From N-tensor powers of the Toeplitz algebra, we construct a multipullback C*-algebra that is a noncommutative deformation of the complex projective space CP(N). Using Birkhoff's Representation Theorem, we prove that the lattice of kernels…

Quantum Algebra · Mathematics 2010-08-05 Piotr M. Hajac , Atabey Kaygun , Bartosz Zielinski
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