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math.DG2021
Closed ray nil-affine manifolds and parabolic geometries
Raphaël Alexandre
Ray nil-affine geometries are defined on nilpotent spaces. They occur in every parabolic geometry and in those cases, the nilpotent space is an open dense subset of the correspondi…
math.DG2021
Closed ray affine manifolds
Raphaël Alexandre
We consider closed manifolds that possess a so called rank one ray structure. That is a (flat) affine structure such that the linear part is given by the products of a diagonal tra…