5 citations · 17 across the 9 of their papers we have counts for
9 papers
Direct sums and abstract Kadets--Klee properties
Tomasz Kiwerski, Paweł Kolwicz
Let be a family of Banach spaces and let be a Banach sequence space defined on . The main aim of this work is to investigate the…
A few last words on pointwise multipliers of Calderón--Lozanovskiĭ spaces
Tomasz Kiwerski, Jakub Tomaszewski
We will provide a complete description of the space of pointwise multipliers between two Calderón--Lozanovskiĭ spaces and built upon a rearrangement invari…
Arithmetic, interpolation and factorization of amalgams
Tomasz Kiwerski, Jakub Tomaszewski
Building upon Bennett's and Grosse-Erdmann's ideas falling under the conceptual umbrella of factorization of inequalities, we propose a unified approach towards the structure of ce…
Essential norms of pointwise multipliers in the non-algebraic setting
Tomasz Kiwerski, Jakub Tomaszewski
Motivated by some recent results, but also referring to recognized classics, we compute the essential norm and the weak essential norm of multiplication operators acting between tw…
Quotients, and abstract Cesàro spaces
Tomasz Kiwerski, Paweł Kolwicz, Jakub Tomaszewski
Investigating some re-arrangement properties of the norm in the quotient spaces we determine the properties of the spaces guaranteeing the existence of a lattice isomet…
Isomorphic and isometric structure of the optimal domains for Hardy-type operators
Tomasz Kiwerski, Paweł Kolwicz, Lech Maligranda
We investigate structure of the optimal domains for the Hardy-type operators including, for example, the classical Cesàro, Copson and Volterra operators as well as for some of thei…
Local approach to order continuity in Cesàro function spaces
Tomasz Kiwerski, Jakub Tomaszewski
The goal of this paper is to present a complete characterisation of points of order continuity in abstract Cesàro function spaces for being a symmetric function space. Und…
Isometric copies of in Cesàro-Orlicz function spaces
Tomasz Kiwerski, Paweł Kolwicz
We characterize Cesàro-Orlicz function spaces containing order isomorphically isometric copy of . We discuss also some useful applicable conditions sufficient for…
Isomorphic copies of in Cesàro-Orlicz function spaces
Tomasz Kiwerski, Paweł Kolwicz
We characterize Cesàro-Orlicz function spaces containing isomorphic copy of . We also describe the subspaces of all order continuous elements of $Ces_…