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Flops, flips and perverse point sheaves on threefold stacks
Authors:Dan Abramovich  Jiun-Cheng Chen  
Affiliation:aDepartment of Mathematics, Box 1917, Brown University, Providence, RI 02912, USA;bDepartment of Mathematics, Northwestern University, 2033 Sheridan Road, Evanston, IL 60208, USA
Abstract:
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