SOME LINEAR OPERATORS BETWEEN SPACES WITH VECTOR NORM

- We study Schrodinger operators in We show how to find closed extensions with essential spectrum equal to the non- negative real axis.. Firstly, most of the Hilbert

In this paper it is esta- blished that the spaces of linear functionals on dual spaces are dual spaces and that the space of linear functionals on a self-dual space is self-dual and

We shall give the proofs only for right-hand group spaces, but it will be obvious that the same considerations apply to left-hand group spaces for which the second

We consider regular operators defined on a directed vector space, with values in an (o)-complete ordered vector space.. We show that some subsets of a space of regular operators

It is known that R(X, Y ) is a complete vector lattice with respect to the usual operations and the order given by the cone of positive operators... Theorem 3.1 implies the

The origin of this paper is the following natural question: Given two Banach spaces B and E, is it possible to describe all the operators from B to E that can be extended to

We will establish a local Li-Yau’s estimate for weak solutions of the heat equation and prove a sharp Yau’s gradient gradient for harmonic functions on metric measure spaces, under

Similar results hold for superpositions from BMOA into Bergman spaces and from the Bloch space into certain weighted Hardy spaces... Auxiliadora Mgrquez and Dragan