IPM Calendar 
Wednesday 16 October 2019   Today  
Events for day: Monday 22 July 2019    
           14:00 - 16:00     Mathtematical Logic Weekly Seminar
Galvins Question on Non-$sigma$-well Ordered Lines


Assume $mathcal{C}$ is the class of all linear orders $L$ such that $L$ is not a countable union of well ordered sets, and every uncountable subset of $L$ contains a copy of $omega_1$. We show that $mathcal{C}$ might have minimal elements which answers a question due to Galvin. ...