Aleksandra Świątczak

collaborators

3 papers

math.FA2023

Delta-Sincov mappings in Banach algebras

Włodzimierz Fechner, Aleksandra Świątczak

We study solutions and approximate solutions of the multiplicative Sincov equation $T (f, h) = T (f, g) T (g, h)$ for mapping $T$ taking values in a commutative Banach algebra.

math.FA2022

Characterizations of derivations on spaces of smooth functions

Włodzimierz Fechner, Aleksandra Świątczak

We provide a list of equivalent conditions under which an additive operator acting on a space of smooth functions on a compact real interval is a multiple of the derivation.

math.FA2020

On the $c_{0}$ -equivalence and permutations of series

Artur Bartoszewicz, Włodzimierz Fechner, Aleksandra Świątczak +1

Assume that a convergent series of real numbers $n = 1 \sum \infty a_{n}$ has the property that there exists a set $A \subseteq N$ such that the series $\sum\limits_{n \in A}…

Delta-Sincov mappings in Banach algebras

Characterizations of derivations on spaces of smooth functions

On the c0​-equivalence and permutations of series

On the $c_{0}$ -equivalence and permutations of series