Article
Isometric weighted composition operators
New York Journal of Mathematics
Author ORCID Identifier
Document Type
Article
Publication Date
8-6-2014
Disciplines
Abstract
A composition operator is an operator on a space of functions defined on the same set. Its action is by composition to the right with a fixed selfmap of that set. A composition operator followed by a multiplication operator is called a weighted composition operator. In this paper, we study when weighted composition operators on the Hilbert Hardy space of the open unit disc are isometric. We find their Wold decomposition in select cases and apply it to the computation of numerical ranges.
Citation Information
Valentin Matache. "Isometric weighted composition operators" New York Journal of Mathematics Vol. 20 (2014) p. 711 - 726 Available at: http://works.bepress.com/valentin-matache/31/
This article was originally published in the New York Journal of Mathematics here: http://nyjm.albany.edu/j/2014/20-35.html. Please visit the journal's homepage here: http://nyjm.albany.edu/nyjm.html.