Reflexive Cones

TL;DR

This paper explores the structure and properties of reflexive cones in Banach spaces, providing characterizations and examining specific classes, linking cone properties to space classifications like reflexive and Schur spaces.

Contribution

It offers a new characterization of reflexive cones via the absence of certain subcones and investigates properties of specific reflexive cone classes, connecting cone theory with Banach space classifications.

Findings

Reflexive cones characterized by absence of -isomorphic subcones.

Certain reflexive cones have norm-compact intersections with the unit ball.

Characterizations of reflexive and Schur spaces via reflexive cone properties.

Abstract

Reflexive cones in Banach spaces are cones with weakly compact intersection with the unit ball. In this paper we study the structure of this class of cones. We investigate the relations between the notion of reflexive cones and the properties of their bases. This allows us to prove a characterization of reflexive cones in term of the absence of a subcone isomorphic to the positive cone of \ell_{1}. Moreover, the properties of some specific classes of reflexive cones are investigated. Namely, we consider the reflexive cones such that the intersection with the unit ball is norm compact, those generated by a Schauder basis and the reflexive cones regarded as ordering cones in a Banach spaces. Finally, it is worth to point out that a characterization of reflexive spaces and also of the Schur spaces by the properties of reflexive cones is given.