Displaying 121 – 140 of 220

Showing per page

On prequojections and their duals.

M. I. Ostrovskii (1998)

Revista Matemática Complutense

The paper is devoted to the class of Fréchet spaces which are called prequojections. This class appeared in a natural way in the structure theory of Fréchet spaces. The structure of prequojections was studied by G. Metafune and V. B. Moscatelli, who also gave a survey of the subject. Answering a question of these authors we show that their result on duals of prequojections cannot be generalized from the separable case to the case of spaces of arbitrary cardinality. We also introduce a special class...

On the numerical range of operators on locally and on H-locally convex spaces

Edvard Kramar (1993)

Commentationes Mathematicae Universitatis Carolinae

The spatial numerical range for a class of operators on locally convex space was studied by Giles, Joseph, Koehler and Sims in [3]. The purpose of this paper is to consider some additional properties of the numerical range on locally convex and especially on H -locally convex spaces.

Currently displaying 121 – 140 of 220