Quasinormality of cones in Hilbert spaces
In: Bulletin de la Classe des Sciences de l'Académie Royale de Sciences, des Lettres et des Beaux-Arts de Belgique, Band 67, Heft 1, S. 536-541
We prove that every cone in a Hilbert space satisfies an optimal quasinormality condition and obtain an eigenvalue theorem for k-set contractions on cones.