Logic seminar - Yair Hayut, "Weak Prediction Principles"

Wed, 01/03/201716:00-18:00
Ross 70
Weak Prediction Principles
Speaker: Yair Hayut
Abstract: Jensen's diamond is a well studied prediction principle. It holds in L (and other core models), and in many cases it follows from local instances of GCH.
In the talk I will address a weakening of diamond (due to Shaleh and Abraham) and present Abraham's theorem about the equivalence between weak diamond and a weak consequence of GCH. Abraham's argument works for successor cardinals. I will discuss what is known and what is open for inaccessible cardinals.
This is a joint work with Shimon Garti and Omer Ben-Neria.