Affine manifolds with dilations

Lee, Kyung Bai; Shin, Joonkook

doi:10.1016/s0166-8641(97)00119-3

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Nilpotent Similarity Structures1

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2020

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“…The following proposition implies that theorem 4.1 is true as soon as the holonomy group is discrete. It is the main result of [LS98].…”

Section: Nilpotent Similarity Structuresmentioning

confidence: 98%

Geodesic convexity and closed nilpotent similarity manifolds

Alexandre

2020

Preprint

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Some nilpotent Lie groups possess a transformation group analogous to the similarity group acting on the Euclidean space. We call such a pair a nilpotent similarity structure. It is notably the case for all Carnot groups and their dilatations. We generalize a theorem of Fried: closed manifolds with a nilpotent similarity structure are either complete or radiant and, in the latter case, complete for the structure of the space deprived of a point. The proof relies on a generalization of convexity arguments in a setting where, in the coordinates given by the Lie algebra, we study geodesic segments instead of linear segments. We show classic consequences for closed manifolds with a geometry modeled on the boundary of a rank one symmetric space.

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“…The following proposition implies that theorem 4.1 is true as soon as the holonomy group is discrete. It is the main result of [LS98].…”

Section: Nilpotent Similarity Structuresmentioning

confidence: 98%