Results 151 to 160 of about 3,784,223 (275)

De Sitter space constraints on brane tensions and couplings

open access: yesJournal of High Energy Physics
We argue for the existence of bounds on the tensions of p-branes in de Sitter space in terms of the Hubble rate and the strength of a class of Chern-Simons-like couplings.
Saquib Hassan   +2 more
doaj   +1 more source

Chern classes for twisted K-theory

open access: yesJournal of Pure and Applied Algebra, 2006
The spectrum level version of the total Chern class map is the map of infinite loop spaces from the \(K\)-theory space of \(X\) taking values in an infinite loop space \({\mathcal H}_{\text{mult}}(X)\) such that its homotopy groups give the units of the motivic cohomology. Such constructions were performed in [\textit{C. P. Boyer} et al., Invent. Math.
openaire   +2 more sources

Kähler shift makes chern classes riemannian

open access: yesTopology, 1989
The author shows that for any Kähler manifold \(M\) the products \(c_p(M)\phi (M)^{n-p},\) \(c_p(M)\) being the Chern classes and \(\phi(M)\) the Kähler class of \(M\), depend only on the underlying oriented Riemannian structure of \(M\). Here, \(\dim M=2n\).
openaire   +2 more sources

1-loop renormalisability of integrable sigma-models from 4d Chern-Simons theory

open access: yesJournal of High Energy Physics
Large families of integrable 2d σ-models have been constructed at the classical level, partly motivated by the utility of integrability on the string worldsheet.
Sylvain Lacroix   +2 more
doaj   +1 more source

Local Chern classes [PDF]

open access: yesAnnales scientifiques de l'École normale supérieure, 1976
openaire   +1 more source

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