Double field theory (DFT) is a proposal to incorporate T-duality, a distinctive symmetry of
string theory, as a symmetry of a field theory defined on a double configuration space. The …

We review recent developments in duality symmetric string theory. We begin with the world-
sheet doubled formalism which describes strings in an extended spacetime with extra …

A bstract We investigate the generalised diffeomorphisms in M-theory, which are gauge
transformations unifying diffeomorphisms and tensor gauge transformations. After giving an …

A bstract We reformulate eleven-dimensional supergravity, including fermions, in terms of
generalised geometry, for spacetimes that are warped products of Minkowski space with a d …

A bstract We find necessary and sufficient conditions for gauge invariance of the action of
Double Field Theory (DFT) as well as closure of the algebra of gauge symmetries. The so …

This is a review of exceptional field theory: a generalisation of Kaluza–Klein theory that
unifies the metric and p-form gauge field degrees of freedom of supergravity into a …

A bstract We construct the non-linear realisation of the semi-direct product of E 11 and its
first fundamental representation at lowest order and appropriate to spacetime dimensions …

A bstract In the doubled field theory approach to string theory the T-duality group is
promoted to a manifest symmetry at the expense of replacing ordinary Riemannian …

A bstract Double field theory provides T-duality covariant generalized tensors that are
natural extensions of the scalar and Ricci curvatures of Riemannian geometry. We search …

Compactifications in duality covariant constructions such as generalised geometry and
double field theory have proven to be suitable frameworks to reproduce gauged …