منابع مشابه
Points and Co-points in Formal Topology
Sunto Dopo una breve introduzione delle principali idee della topologia formale [Sam87] vengono introdotte le nozioni di punto e co-punto. Si presentano quindi alcuni metodi per costruire punti e co-punti in opportune topologie formali e si forniscono alcune applicazioni logiche di tali costruzioni 1 .
متن کاملConcerning weak ∗ - extreme points
Every separable nonreflexive Banach space admits an equivalent norm such that the set of the weak-extreme points of the unit ball is discrete.
متن کاملOn the Extreme Points and Strongly Extreme Points in Köthe–bochner Spaces
We give the necessary conditions of extreme points and strongly extreme points in the unit ball of Köthe–Bochner spaces. The conditions have been shown to be sufficient earlier.
متن کاملExtreme Points of Vector Functions
Several previous investigations have appeared in the literature which discuss the nature of the set T in »-dimensional space spanned by the vectors ifsdui, ■ ■ ■ , fsdp.n) where 5 ranges over all measurable sets. It was first shown by Liapounov that xi ui, • • ■ , un are atomless measures, then the set F is convex and closed. Extensions of this result were achieved by D. Blackwell [l] and Dvore...
متن کاملTwo-lattice polyhedra: duality and extreme points
Two-lattice polyhedra are a special class of lattice polyhedra that include network 4ow polyhedra, fractional matching polyhedra, matroid intersection polyhedra, the intersection of two polymatroids, etc. In this paper we show that the maximum sum of components of a vector in a 2-lattice polyhedron is equal to the minimum capacity of a cover for the polyhedron. For special classes of 2-lattice ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Studia Mathematica
سال: 2009
ISSN: 0039-3223,1730-6337
DOI: 10.4064/sm191-3-1