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Root stack valuative criterion for good moduli spaces
Published 11 Jul 2025 in math.AG, math.NT, and math.RT | (2507.08642v1)
Abstract: We prove a root stack valuative criterion for good moduli space maps and for gerbes for reductive groups under some mild assumptions on the residue characteristic. We give several applications to parahoric extension for torsors, rational points on stacks, gerbes and homogeneous spaces, and the geometry of fibrations.
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