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math.DG2002
Orbifolds as Groupoids: an Introduction
Ieke Moerdijk
This is a survey paper based on my talk at the Workshop on Orbifolds and String Theory, the goal of which was to explain the role of groupoids and their classifying spaces as a fou…
math.DG2002
On the Classification of Regular Groupoids
I. Moerdijk
We observe that any regular Lie groupoid G over an manifold M fits into an extension of a foliation groupoid E by a bundle of connected Lie groups K. If $\FF$ is th…