4 citations · 12 across the 8 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…
Quasi-modular spaces with applications to quasi-normed Calderón-Lozanovski\uı spaces
Paweł Foralewski, Henryk Hudzik, Paweł Kolwicz
In this paper we introduce the notion of a quasi-modular and we prove that the respective Minkowski functional of the unit quasi-modular ball becomes a quasi-norm. In this way, we…
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…
Symmetrization, factorization and arithmetic of quasi-Banach function spaces
Pawel Kolwicz, Karol Lesnik, Lech Maligranda
We investigate relations between symmetrizations of quasi-Banach function spaces and constructions such as Calderon-Lozanovskii spaces, pointwise product spaces and pointwise multi…
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_…
Pointwise products of some Banach function spaces and factorization
Paweł Kolwicz, Karol Leśnik, Lech Maligranda
The well-known factorization theorem of Lozanovski{\u ı} may be written in the form , where means the pointwise product of Banach ideal spac…
Pointwise multipliers of Calderón-Lozanovskii spaces
Pawel Kolwicz, Karol Lesnik, Lech Maligranda
Several results concerning multipliers of symmetric Banach function spaces are presented firstly. Then the results on multipliers of Calderón-Lozanovskii spaces are proved. We inve…