6 citations · 34 across the 26 of their papers we have counts for
12 papers · 1 filter
Uncentred maximal operators with respect to half balls on Damek--Ricci spaces
Nikolaos Chalmoukis, Stefano Meda, Effie Papageorgiou +1
In this paper we study a variant of the uncentred Hardy--Littlewood maximal operator on Damek--Ricci spaces in which balls are replaced by suitable half balls. Perhaps surprisingly…
Maximal subspaces of strong continuity for composition semigroups
Nikolaos Chalmoukis, Álvaro Miguel Moreno
Let a semigroup of holomorphic self-maps of the unit disk and the semigroup of composition operators which corresponds to Given a…
Generalized Foguel-Hankel Operators
Nikolaos Chalmoukis, Giovanni Marano
In this paper we introduce a more general class of Foguel-Hankel operators, where the unilateral shift on is replaced by a general multiplication operator on…
Operators with small Kreiss constants
Nikolaos Chalmoukis, Georgios Tsikalas, Dmitry Yakubovich
We investigate matrices satisfying the Kreiss condition with lying arbitrarily close to We provide lower bo…
Quaternionic Carleson measures
Nikolaos Chalmoukis, Giulia Sarfatti
In this paper we provide a general construction of a quaternionic Banach space of slice regular functions from a given Banach space of holomorphic functions, which we call its quat…
Spider's webs and sharp bounds for the Hardy--Littlewood maximal operator on Gromov hyperbolic spaces
Nikolaos Chalmoukis, Stefano Meda, Federico Santagati
In this paper we prove that if and is a locally doubling -hyperbolic complete connected length metric measure space with -pinched exponential growth a…
Simply interpolating and Carleson sequences for Hardy spaces in the polydisc
Nikolaos Chalmoukis, Alberto Dayan
We study the relation between simply and universally interpolating sequences for the holomorphic Hardy spaces on the polydisc. In dimension a sequence is…
Potential theory and boundary behavior in the Drury-Arveson space
Nikolaos Chalmoukis, Michael Hartz
We develop a notion of capacity for the Drury-Arveson space of holomorphic functions on the Euclidean unit ball. We show that every function in has a non-tangential…
Generalized Hilbert operators arising from Hausdorff matrices
Carlo Bellavita, Nikolaos Chalmoukis, Vassilis Daskalogiannis +1
For a finite, positive, Borel measure on we consider an infinite matrix , related to the classical Hausdorff matrix defined by the same measure , in the same al…
Simply interpolating sequences in complete Pick spaces
Nikolaos Chalmoukis, Alberto Dayan, Michael Hartz
We characterize simply interpolating sequences (also known as onto interpolating sequences) for complete Pick spaces. We show that a sequence is simply interpolating if and only if…
The Drury--Arveson space on the Siegel upper half-space and a von Neumann type inequality
Nicola Arcozzi, Nikolaos Chalmoukis, Alessandro Monguzzi +2
In this work we study what we call Siegel--dissipative vector of commuting operators on a Hilbert space and we obtain a von Neumann type inequa…
Totally null sets and capacity in Dirichlet type spaces
Nikolaos Chalmoukis, Michael Hartz
In the context of Dirichlet type spaces on the unit ball of , also known as Hardy-Sobolev or Besov-Sobolev spaces, we compare two notions of smallness for compact sub…