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28 March 2024
 
  » arxiv » 1102.4388

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On the existence of bibundles
Michael Murray ; David Michael Roberts ; Danny Stevenson ;
Date 22 Feb 2011
AbstractWe consider the existence of bibundles, in other words locally trivial principal $G$ spaces with commuting left and right $G$ actions. We show that their existence is closely related to the structure of the group $Out(G)$ of outer automorphisms of $G$. We also develop a classifying theory for bibundles. The theory is developed in full generality for $(H, G)$ bibundles for a crossed-module $(H, G)$ and we show with examples the close links with loop group bundles.
Source arXiv, 1102.4388
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