In the coming weeks we shall have, in addition to Set Theory seminar a series of lectures by Uri Abraham on open colouring axioms and their relatives. 
The lectures are intended to be accessible to any student that is familiar with the basic technique of forcing iterations. (Familiarity with the standard proof of the consistency of Martin Axiom should be enough)  
Abstract
Baumgartner proved in 1970 the consistency of the statement that every two
\aleph_1 sets of reals (with no end-points) are order-isomorphic. The lectures
will cover this result as well as some other results such as the open coloring axioms that were motivated by this work of Baumgartner. We will 
describe results and problems from the paper by Rubin, Shelah and the lecturerand perhaps other articles as well.


 
The lectures will be held before our regular seminar on Wednesday 12-1330, starting this Wednesday, March 9th, in Ross building room 70.
We shall try to broad cast the lectures on ZOOM with the usual seminar link 
https://huji.zoom.us/j/81672724380?pwd=VXcxQWw5aHpzNkp2ZUk5amtDMTc0Zz09


Meeting ID: 816 7272 4380
Passcode: 998395