A Solution to the L Space Problem

@inproceedings{Moore2005AST,
  title={A Solution to the L Space Problem},
  author={J. Tatch Moore and Stevo Todorcevic},
  year={2005}
}
In [23], Todorcevic gives a survey of basis problems in combinatorial set theory, listing nine theorems and six working conjectures — all in the presence of PFA — including the following three of interest to us here: Conjecture 1 (Todorcevic; [23]). If R is a binary relation, then either R ≤ א0 ·ω1 or [ω1]0 ≤ R. Conjecture 2 (Hajnal, Juhasz; [5]). If X is a… CONTINUE READING