Franklin Tall: Arhangel’skii’s Lindelof points- $G_{\delta}$ problem

Place: Fields Institute (Room 210)

Date: October 21st, 2016 (13:30-15:00)

Speaker: Franklin Tall

Title: Arhangel’skii’s Lindelof points- $G_{\delta}$ problem

Abstract: My claim of a solution was premature. I will discuss the history of the
problem, introduce n-dowments and the Mitchell collapse, and prove some results that could lead to a solution. If time permits, I will correct and improve a result I talked about last summer, proving that if every Hurewicz projective set of reals in sigma-compact, then there is an inaccessible in an inner model.