Abstract:We study the Rudin–Keisler pre-order on Fréchet–Urysohn ideals on
$\omega $
. We solve three open questions posed by S. García-Ferreira and J. E. Rivera-Gómez in the articles [5] and [6] by establishing the following results:
•
For every AD family
$\mathcal {A},$
there is an AD family
$\mathcal {B}$
such that
$\mathcal {A}^{\perp } <_{{\textsf {RK}}}\mathcal {B}^{… Show more
Set email alert for when this publication receives citations?
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.