Czasopismo
Tytuł artykułu
Warianty tytułu
Języki publikacji
Abstrakty
We introduce and study a new class of locally convex vector lattices of continuous functions on a locally compact Hausdorff space, which we call regular vector lattices. We investigate some general properties of these spaces and of the subspaces of so-called generalized affine functions. Moreover, we present some Korovkin-type theorems for continuous positive linear operators; in particular, we study Korovkin subspaces for finitely defined operators, for the identity operator and for positive projections.
Due to its length, the paper is split up into two parts of distinct character; in this first part, we introduce the class of regular vector lattices, we prove an integral representation theorem for continuous positive linear forms and we study some enveloping functions related to a continuous positive operator, together with the corresponding space of generalized affine functions. Finally, we obtain a Stone-Weierstrass type theorem.
In the second part, which will appear in the same journal, we will present some Korovkin-type theorems, together with some applications.
Due to its length, the paper is split up into two parts of distinct character; in this first part, we introduce the class of regular vector lattices, we prove an integral representation theorem for continuous positive linear forms and we study some enveloping functions related to a continuous positive operator, together with the corresponding space of generalized affine functions. Finally, we obtain a Stone-Weierstrass type theorem.
In the second part, which will appear in the same journal, we will present some Korovkin-type theorems, together with some applications.
Słowa kluczowe
Kategorie tematyczne
Czasopismo
Rocznik
Tom
Numer
Strony
239-260
Opis fizyczny
Daty
wydano
2005
Twórcy
autor
- Department of Mathematics, University of Bari, Campus Universitario, Via E. Orabona, 4, 70125 Bari, Italy
- Department of Mathematics, University of Bari, Campus Universitario, Via E. Orabona, 4, 70125 Bari, Italy
Bibliografia
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.bwnjournal-article-doi-10_4064-sm171-3-3