The Protasov-Zelenyuk topology and ideal convergence

Lydia Außenhofer, Dikran Dikranjan, Anna Giordano Bruno

The so-called $T$-sequences $\mathbf{u}$ in a group $G$, and the related finest Hausdorff group topology $T_{\mathbf{u}}$ on $G$ that makes $\mathbf{u}$ a null sequence, were introduced…