Displaying similar documents to “Existence et unicité du maximum d'une forme linéaire sur un ensemble de matrices diagonales”

Convexes hyperboliques et fonctions quasisymétriques

Yves Benoist (2003)

Publications Mathématiques de l'IHÉS

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Every bounded convex open set Ω of is endowed with its Hilbert metric . We give a necessary and sufficient condition, called quasisymmetric convexity, for this metric space to be hyperbolic. As a corollary, when the boundary is real analytic, Ω is always hyperbolic. In dimension 2, this condition is: in affine coordinates, the boundary ∂Ω is locally the graph of a C strictly convex function whose derivative is quasisymmetric.

Points fixes

Haïm Brezis (1964-1965)

Séminaire Choquet. Initiation à l'analyse

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