Cohomological invariants of root stacks and admissible double coverings
Algebraic Geometry
2020-10-22 v2
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 stack of admissible double coverings.
Keywords
Cite
@article{arxiv.2009.07671,
title = {Cohomological invariants of root stacks and admissible double coverings},
author = {Andrea Di Lorenzo and Roberto Pirisi},
journal= {arXiv preprint arXiv:2009.07671},
year = {2020}
}
Comments
17 pages, comments welcome! New version: changed to allow for coefficients in a general cycle module, as in arxiv:2002.11065