6 papers
Sharp lower bounds for generalized operator products
Dominique Guillot, Javad Mashreghi, Prateek Kumar Vishwakarma
We consider general bilinear products defined by positive semidefinite matrices. Typically non-commutative, non-associative, and non-unital, these products preserve positivity and…
Functional Calculi, Positivity, and Convolution of Matrices
Javad Mashreghi, Mostafa Nasri, Prateek Kumar Vishwakarma
Convolution admits a natural formulation as a functional operation on matrices. Motivated by the functional and entrywise calculi, this leads to a framework in which convolution de…
Weighted composition operators on de Branges-Rovnyak spaces
Emmanuel Fricain, Muath Karaki, Javad Mashreghi +1
In this paper, we characterize the boundedness and the compactness of weighted composition operators acting on a de Branges-Rovnyak space , where the symbol is a…
Infinitely supported harmonically weighted Dirichlet spaces which are de Branges Rovnyak spaces
Carlo Bellavita, Eugenio Dellepiane, Andreas Hartmann +1
Harmonically weighted Dirichlet spaces and de Branges_Rovnyak spaces are two fundamental structures in analytic function theory exhibiting rich and…
Schauder Basis with Finite Blaschke Products
Emmanuel Fricain, Javad Mashreghi, Mostafa Nasri +1
We construct a Schauder basis for the space , the space of holomorphic functions on the closed unit disk, consisting entirely of finite Blaschke products. The expan…
The Cesàro operator on local Dirichlet spaces
Eugenio Dellepiane, Javad Mashreghi, Mostafa Nasri +1
The family of Cesàro operators , and , consists of finite rank operators on Banach spaces of analytic functions on the open unit disc. In this work, w…