Mathematics – Algebraic Geometry
Scientific paper
2006-02-28
Mathematics
Algebraic Geometry
19 pages
Scientific paper
We prove Artin's axioms satisfy a compatibility for composition of
1-morphisms of stacks in groupoids. Consequently, some natural stacks in
groupoids are algebraic, including a common generalization of Vistoli's Hilbert
stack and the stack of branchvarieties of Alexeev and Knutson.
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