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- W138620596 abstract "We extend the results of [11] on embedded CR manifolds of CR dimension and codimension two to abstract partially integrable almost CR manifolds. We prove that points on such manifolds fall into three different classes, two of which (the hyperbolic and the elliptic points) always make up open sets. We prove that manifolds consisting entirely of hyperbolic (respectively elliptic) points admit canonical Cartan connections. More precisely, these structures are shown to be exactly the normal parabolic geometries of types $(PSU(2, 1) times PSU(2, 1), B times B)$, respectively $(PSL(3, mathbb{C}), B)$, where $B$ indicates a Borel subgroup. We then show how general tools for parabolic geometries can be used to obtain geometric interpretations of the torsion part of the harmonic components of the curvature of the Cartan connection in the elliptic case." @default.
- W138620596 created "2016-06-24" @default.
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- W138620596 date "2019-01-01" @default.
- W138620596 modified "2023-09-29" @default.
- W138620596 title "Partially Integrable Almost CR Manifolds of CR Dimension and Codimension Two" @default.
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- W138620596 doi "https://doi.org/10.2969/aspm/03710045" @default.
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