Type: Article

Intersection numbers of families of ideals

Hrušák, M.; Martinez-Ranero, C. A.; Ramos-Garcia, U. A.; et al.;

Abstract:

We study the intersection number of families of tall ideals. We show that the intersection number of the class of analytic P-ideals is equal to the bounding number , the intersection number of the class of all meager ideals is equal to and the intersection number of the class of all F (sigma) ideals is between and , consistently different from both.