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.
Cohomological invariants of root stacks and admissible double coverings / Di Lorenzo, A.; Pirisi, R.. - In: CANADIAN JOURNAL OF MATHEMATICS-JOURNAL CANADIEN DE MATHEMATIQUES. - ISSN 0008-414X. - 75:1(2023), pp. 202-224. [10.4153/S0008414X21000602]
Cohomological invariants of root stacks and admissible double coverings
Pirisi R.
2023
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.File in questo prodotto:
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