#### Volume 22, issue 3 (2022)

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Equivariant cohomology and the super reciprocal plane of a hyperplane arrangement

### Sophie Kriz

Algebraic & Geometric Topology 22 (2022) 991–1015
##### Abstract

We investigate certain graded-commutative rings which are related to the reciprocal plane compactification of the coordinate ring of a complement of a hyperplane arrangement. We give a presentation of these rings by generators and defining relations. This presentation was used by Holler and I Kriz (2020) to calculate the $ℤ$–graded coefficients of localizations of ordinary –graded equivariant cohomology at a given set of representation spheres, and also more recently by the author in a generalization to the case of an arbitrary finite group. We also give an interpretation of these rings in terms of superschemes, which can be used to further illuminate their structure.

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