Cohomological invariants of root stacks and admissible double coverings
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Published:2021-11-02
Issue:
Volume:
Page:1-23
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ISSN:0008-414X
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Container-title:Canadian Journal of Mathematics
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language:en
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Short-container-title:Can. J. Math.-J. Can. Math.
Author:
Di Lorenzo Andrea,
Pirisi RobertoORCID
Abstract
Abstract
We give a formula for the cohomological invariants of a root stack, which we apply to compute the cohomological invariants and the Brauer group of the compactification of the stacks of hyperelliptic curves given by admissible double coverings.
Publisher
Canadian Mathematical Society
Subject
General Mathematics