Marcin Sabok

activity

20082023

most citedAutomatic continuity for isometry groups

10 citations · 57 across the 21 of their papers we have counts for

collaborators

Showing 2010 · math.LOShow all

2 papers · 2 filters

math.LO2010

Complexity of Ramsey null sets

Marcin Sabok

We show that the set of codes for Ramsey positive analytic sets is $Σ_{2}^{1}$ -complete. This is a one projective-step higher analogue of the Hurewicz theorem saying that the se…

math.LO2010

Forcing properties of ideals of closed sets

Marcin Sabok, Jindrich Zapletal

With every $σ$ -ideal $I$ on a Polish space we associate the $σ$ -ideal $I^{*}$ generated by the closed sets in $I$ . We study the forcing notions of Borel sets modulo the respective $σ…