Series: Logic Seminar Speaker: Stephen G. Simpson (Penn State) Title: Borel models realizing uncountably many types Date: Tuesday, April 28, 1998 Time: 2:30 PM Place: 113 McAllister Building Abstract: I shall present some results and problems concerning Borel models. Some of the results are proved by means of indiscernibles and the Halpern-L"auchli theorem.