Extensions of positive operators and extreme points. I
Extensions of positive operators and extreme points. II
Extensions of positive operators and extreme points. III
Extensions of positive operators and extreme points. IV
Extensions of Two Fixed Point Theorems of Ky Fan.
Extensions uniformes des formes linéaires positives
Soit un sous-espace fermé d’un espace de Banach ordonné ; ce travail propose des conditions nécessaires et suffisantes pour qu’il existe , tel que toute forme linéaire positive et continue sur admette une extension linéaire positive et continue sur , vérifiant . On termine par l’exemple d’un couple ne possédant pas la propriété précédente bien que toute forme linéaire positive continue sur se prolonge en une forme linéaire du même type en .
Extensions uniformes des opérateurs positifs
Extremal Maps of a Hilbert Space Equipped with a Natural Cone.
Extremal solutions of a general marginal problem
The characterization of extremal points of the set of probability measures with given marginals is given in the general context of a marginal system. The sets of marginal uniqueness are studied and an example is added to illustrate the theory.
Extremal Structure of Convex Sets in Spaces Not Containing co.
Extremal units in an archimedean Riesz space
Extreme and exposed representing measures of the disk algebra
We study the extreme and exposed points of the convex set consisting of representing measures of the disk algebra, supported in the closed unit disk. A boundary point of this set is shown to be extreme (and even exposed) if its support inside the open unit disk consists of two points that do not lie on the same radius of the disk. If its support inside the unit disk consists of 3 or more points, it is very seldom an extreme point. We also give a necessary condition for extreme points to be exposed...
Extreme Boundaries and continous affine functions.
Extreme Contraction Operators on l...
Extreme contractions on certain function spaces
Extreme extensions of positive operators
Extreme extensions of positive operators, II
Extreme operators on 2-dimensional -spaces
Extreme operators on AL-spaces
Extreme points and descriptive sets
A class of closed, bounded, convex sets in the Banach space is shown to be a complete PCA set.