Seminars & Colloquia Calendar
Forcing a universal triangle free graph in $\aleph_1$ without CH, III
Saharon Shelah of HUJI and Rutgers University
Location: HILL 705
Date & time: Monday, 30 October 2017 at 5:00PM - 6:00PM
Abstract: Say that consistently there are $\aleph_2$ less than continuum graphs ! each of size $\aleph_1$ which form a universal family. See work with Dzamonja [614] and [457]. Here we use a forcing which is half way between CS, product, and CS iteration. We also discuss the method in related cases.
This talk is based on earlier results from paper [F1340] on the archive: (http://shelah.logic.at/).
