Bonnisseau, Jean-Marc; Chebbi, Souhail; Gourdel, Pascal; … - Centre d'Économie de la Sorbonne, Université Paris 1 … - 2007
We present an extension of Borsuk's antipodal theorem (existence of a zero) for antipodally approachable correspondences without convex values. This result is a generalization of Borsuk-Ulam Theorem and has a fixed-point equivalent formulation.