Full-splitting Miller trees and infinitely often equal reals

Yurii Khomskii, Giorgio Laguzzi

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Abstract

We investigate two closely related partial orders of trees on ωω: the full-splitting Miller trees and the infinitely often equal trees, as well as their corresponding σ-ideals. The former notion was considered by Newelski and Rosłanowski while the latter involves a correction of a result of Spinas. We consider some Marczewski-style regularity properties based on these trees, which turn out to be closely related to the property of Baire, and look at the dichotomies of Newelski–Rosłanowski and Spinas for higher projective pointclasses. We also provide some insight concerning a question of Fremlin whether one can add an infinitely often equal real without adding a Cohen real, which was recently solved by Zapletal.

Lingua originaleInglese
pagine (da-a)1491-1506
Numero di pagine16
RivistaAnnals of Pure and Applied Logic
Volume168
Numero di pubblicazione8
DOI
Stato di pubblicazionePubblicato - ago 2017
Pubblicato esternamente

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