Mathematics – Algebraic Topology
Scientific paper
2003-02-15
Mathematics
Algebraic Topology
19 pages
Scientific paper
It is well-known that an effective orbifold M (one for which the local stabilizer groups act effectively) can be presented as a quotient of a smooth manifold P by a locally free action of a compact lie group K. We use the language of groupoids to provide a partial answer to the question of whether a noneffective orbifold can be so presented. We also note some connections to stacks and gerbes.
Henriques Andre
Metzler David
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