Madness and (weak) normality

Abstract

We consider weakenings of normality in -spaces and prove that the existence of a MAD family whose -space is almost-normal is independent of ZFC. We also construct a partly-normal not quasi-normal AD family, answering questions from Garc\'ia-Balan and Szeptycki. We finish by showing that the concepts of almost-normal and strongly 0-separated AD families are different, even under CH, answering a question from Oliveira-Rodrigues and Santos-Ronchim

0

Turn this paper into a full lesson

ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.

Discussion (0)

Sign in to join the discussion.

Loading comments…