Series: Penn State Logic Seminar Date: Tuesday, October 17, 2006 Time: 2:30 - 3:45 PM Place: 106 McAllister Building Speaker: Carl Mummert, University of Michigan, Mathematics Title: Reverse mathematics and weak combinatorial principles Abstract: I will discuss recent work of Shore and Hirschfeldt (2005) and Hirschfeldt, Jockusch, Kjos-Hanssen, Lempp, and Slaman (2005) on the Reverse Mathematics and computability aspects of several combinatorial principles weaker than Ramsey's theorem for pairs.