Seminar Talk

Toronto Set Theory

Event Information The Shelah-Steprans property of ideals
13:30 on Friday November 17, 2017
15:00 on Friday November 17, 2017
FI210, Fields Institute, 222 College St.
Osvaldo Guzman Gonzalez

York University

An ideal I has the Shelah-Steprans property if for every set X of finite sets, there is an element of I that either intersects every element of X or contains infinitely many elements of X. We will give a characterization of the Borel Shelah-Steprans ideals in terms of the Katetov order and we will see some applications in the destructibility of MAD families.