Representations of ideals in Polish groups and in Banach spaces

Piotr Borodulin-Nadzieja, Barnabas Farkas, Grzegorz Plebanek

We investigate ideals of the form $\{A\subseteq \omega :{\sum }_{n\in A}{x}_n$ is unconditionally convergent $\}$, where $(x_n{)}_{n\in \omega }$ is a sequence in a Polish group or in a Banach…