15 citations · 68 across the 21 of their papers we have counts for
4 papers · 2 filters
Sesquilinear forms associated to sequences on Hilbert spaces
Rosario Corso
The possibility of defining sesquilinear forms starting from one or two sequences of elements of a Hilbert space is investigated. One can associate operators to these forms and in…
Frames and weak frames for unbounded operators
Giorgia Bellomonte, Rosario Corso
In 2012 Găvruţa introduced the notions of -frame and of atomic system for a linear bounded operator in a Hilbert space , in order to decompose its range $\mathc…
Maximal operators with respect to the numerical range
Rosario Corso
Let be a nonempty, proper, convex subset of . The -maximal operators are defined as the operators having numerical ranges in …
A Lebesgue-type decomposition for non-positive sesquilinear forms
Rosario Corso
A Lebesgue-type decomposition of a (non necessarily non-negative) sesquilinear form with respect to a non-negative one is studied. This decomposition consists of a sum of three par…