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Tuning in: diasporas at the BBC World Service
This article looks at diaspora through the transformations of an established public service broadcaster, the BBC World Service in a fast changing landscape of global broadcasting, by considering some of the findings of the AHRC-funded Tuning In: Contact Zones at the BBC World Service, which is part of the Diasporas, Migration and Identities program. Tuning In has six themes, each of which focuses upon the role of the BBC WS: The Politics of Translation, Diasporic Nationhood, Religious Transnationalism, Sport across Diasporas, Migrating Music and Drama for Developmen
Parallel spinors and holonomy groups on pseudo-Riemannian spinmanifolds
We describe the possible holonomy groups of simply connected irreducible
non-locally symmetric pseudo-Riemannian spin manifolds which admit parallel
spinors.Comment: Latex2.09, 18 page
Local Type I Metrics with Holonomy in
By [arXiv:1604.00528], a list of possible holonomy algebras for
pseudo-Riemannian manifolds with an indecomposable torsion free -structure is known. Here indecomposability means that the standard
representation of the algebra on does not leave invariant
any proper non-degenerate subspace. The dimension of the socle of this
representation is called the type of the Lie algebra. It is equal to one, two
or three. In the present paper, we use Cartan's theory of exterior differential
systems to show that all Lie algebras of Type I from the list in
[arXiv:1604.00528] can indeed be realised as the holonomy of a local metric.
All these Lie algebras are contained in the maximal parabolic subalgebra
that stabilises one isotropic line of . In
particular, we realise by a local metric
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