English

Iterated club shooting and the stationary-logic constructible model

Logic 2026-03-10 v2

Abstract

We investigate iterating the construction of C(aa)C(\mathtt{aa}), the LL-like inner model constructed using stationary-logic. We show that it is possible to force over generic extensions of LL to obtain a model of V=C(aa)V=C(\mathtt{aa}), and to obtain models in which the sequence of iterated C(aa)C(\mathtt{aa})s is decreasing of arbitrarily large order types. For this we prove distributivity and stationary-set preservation properties for countable iterations of club-shooting forcings using mutually stationary sets, and introduce the notion of mutually fat sets which yields better distributivity results even for uncountable iterations.

Keywords

Cite

@article{arxiv.2209.10247,
  title  = {Iterated club shooting and the stationary-logic constructible model},
  author = {Ur Ya'ar},
  journal= {arXiv preprint arXiv:2209.10247},
  year   = {2026}
}

Comments

35 pages, revised