Full-splitting Miller trees and infinitely often equal reals

We investigate two closely related partial orders of trees on omega(omega) : the full-splitting Miller trees and the infinitely often equal trees, as well as their corresponding sigma-ideals. The former notion was considered by Newelski and Roslanowski 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- Roslanowski 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. (C) 2017 Elsevier B.V. All rights reserved.