The seminar meets on Wednesday March 28th at 11:00 in the Institute of Mathematics CAS, Zitna 25, seminar room, 3rd floor, front building.
Program: Borisa Kuzeljevic — Isomorphic substructures of Fraisse limits
This is joint work with Milos Kurilic. For a relational structure X, its poset of copies is the set of all the substructures of X which are isomorphic to X, enlarged with the empty set, and ordered by inclusion. We will analyze posets of copies of various countable ultrahomogeneous structures. In particular, we will show that for many of these structures the class of order types of maximal chains of copies coincides with the class of order types of compact sets of reals with minimum non-isolated.