Ideal versions of the Bolzano-Weierstrass property


Jiakui Yu, Shuguo Zhang




Let I, J be ideals on ω, we say that a space X has (I, J)-BW property if every sequence in X contains a J-converging subsequence indexed by an I-positive set. This is a common generalization of BW-like properties types. By modifying some classic notions, we obtain some characterizations of (I, J)-BW property,