7 citations · 33 across the 7 of their papers we have counts for
13 papers
Rigid models for 2-gerbes I: Chern-Simons geometry
David Michael Roberts, Raymond F. Vozzo
Motivated by the problem of constructing explicit geometric string structures, we give a rigid model for bundle 2-gerbes, and define connective structures thereon. This model is de…
Sign choices for orientifolds
Pedram Hekmati, Michael K. Murray, Richard J. Szabo +1
We analyse the problem of assigning sign choices to O-planes in orientifolds of type II string theory. We show that there exists a sequence of invariant -gerbes with ,…
The smooth Hom-stack of an orbifold
David Michael Roberts, Raymond F. Vozzo
For a compact manifold M and a differentiable stack \cX presented by a Lie groupoid X, we show the Hom-stack Hom(M,\cX) is presented by a Fréchet-Lie groupoid Map(M,X) and so is an…
Real bundle gerbes, orientifolds and twisted KR-homology
Pedram Hekmati, Michael K. Murray, Richard J. Szabo +1
We consider Real bundle gerbes on manifolds equipped with an involution and prove that they are classified by their Real Dixmier-Douady class in Grothendieck's equivariant sheaf co…
Smooth loop stacks of differentiable stacks and gerbes
David Michael Roberts, Raymond F. Vozzo
Résumé. Nous définissons un groupoïde de Fréchet-Lie Map(S^1,X) d'ana-foncteurs du cercle vers un groupoïde de Lie X. Ceci fournit une présentation du Hom-champ Hom(S^1,\cX), où \c…
Equivariant bundle gerbes
Michael K. Murray, David Michael Roberts, Danny Stevenson +1
We develop the theory of simplicial extensions for bundle gerbes and their characteristic classes with a view towards studying descent problems and equivariance for bundle gerbes.…