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Grassmannians and conformal structure on absolutes

Sasha Anan'in, Eduardo C. Bento Goncalves, Carlos H. Grossi
Arxiv ID: 0907.4469Last updated: 1/27/2020
We study grassmannians associated with a linear space with a nondegenerate hermitian form. The geometry of these grassmannians allows us to explain the relation between a (pseudo-)riemannian projective geometry and the conformal structure on its ideal boundary (absolute). Such relation encompasses, for instance, the usual conformal structure on the absolute of real hyperbolic space, the usual conformal structure on the absolute of de Sitter space, the conformal contact structure on the absolute of complex hyperbolic space, and the causal structure on the absolute of anti-de Sitter space.

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