Results 11 to 20 of about 2,362,828 (289)

Principal non-commutative torus bundles [PDF]

open access: yesProceedings of the London Mathematical Society, 2008
In this paper we study continuous bundles of C*-algebras which are non-commutative analogues of principal torus bundles. We show that all such bundles, although in general being very far away from being locally trivial bundles, are at least locally trivial with respect to a suitable bundle version of bivariant K-theory (denoted RKK-theory) due to ...
Echterhoff, Siegfried   +2 more
core   +5 more sources

Principal Co-Fiber Bundles [PDF]

open access: yesTransactions of the American Mathematical Society, 1976
Principal co-fiber bundles are defined in the category of topological groups. They are Eckmann-Hilton duals of principal fiber bundles. A classification theorem is provided as well as an example which almost represents the most general case.
Elyahu Katz
openaire   +2 more sources

On connections on principal bundles [PDF]

open access: yesArab Journal of Mathematical Sciences, 2017
A new construction of a universal connection was given in Biswas, Hurtubise and Stasheff (2012). The main aim here is to explain this construction. A theorem of Atiyah and Weil says that a holomorphic vector bundle E over a compact Riemann surface admits
Indranil Biswas
doaj   +2 more sources

Diffeological principal bundles and principal infinity bundles [PDF]

open access: yesJournal of Homotopy and Related Structures, 2023
In this paper, we study diffeological spaces as certain kinds of discrete simplicial presheaves on the site of cartesian spaces with the coverage of good open covers. The Čech model structure on simplicial presheaves provides us with a notion of $\infty$-stack cohomology of a diffeological space with values in a diffeological abelian group $A$.
Minichiello, Emilio
openaire   +3 more sources

Principal Bundles and Gauge Theories [PDF]

open access: yes, 2011
This set of lecture notes first gives an introduction to the geometry of principal bundles. Next, it demonstrates how they can be used to formalize the concept of gauge theories arising in physics. A basic familiarity with the differential geometry of manifolds and the classical field theories of general relativity and electromagnetism is assumed.
Vákár, Matthijs
openaire   +4 more sources

Lie algebroids and the geometry of off-shell BRST

open access: yesNuclear Physics B, 2021
It is well-known that principal bundles and associated bundles underlie the geometric structure of classical gauge field theories. In this paper, we explore the reformulation of gauge theories in terms of Lie algebroids and their associated bundles. This
Luca Ciambelli, Robert G. Leigh
doaj   +1 more source

Analyzing the Interrelationships among Various Ecosystem Services from the Perspective of Ecosystem Service Bundles in Shenyang, China

open access: yesLand, 2022
An understanding of the relationships among multiple ecosystem services (ES) facilitates ecosystem management and decision-making. The study of ES bundles can well explain the complex interactions between different ES in a region.
Shuang Gan   +8 more
doaj   +1 more source

Linear and projective connections over a smooth manifold

open access: yesДифференциальная геометрия многообразий фигур, 2023
The principal bundles of the first order coframes and the second order coframes, as well as factor bundle of centroprojective (coaffine) coframes are considered.
Yu. I. Shevchenko, A. V. Vyalova
doaj   +1 more source

Stem anatomical survey of the genera Matricaria and Tripleurospermum (Asteraceae) from Turkey with its taxonomical and ecological implications [PDF]

open access: yesBotanica Serbica, 2022
A comparative anatomical study of the stems in 32 taxa assigned in the two related genera; Matricaria (4 taxa) and Tripleurospermum (28 taxa, 30 accessions), was carried out in Turkey by using cluster analysis (CA) and principal component analysis ...
Melahat Ozcan, Huseyin Inceer
doaj   +1 more source

On principal $G_2$ bundles [PDF]

open access: yesAsian Journal of Mathematics, 1999
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +1 more source

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