서울대 작용소 세미나 2009 Dec 12: N.C.Phillips(Univ. of Oregon); An introduction to the structure of crossed product C*-algebras 1. What is a crossed product? 2009 Dec 14: N.C.Phillips(Univ. of Oregon); An introduction to the structure of crossed product C*-algebras 2. Explicit computations. 2009 Dec 15: N.C.Phillips(Univ. of Oregon); An introduction to the structure of crossed product C*-algebras 3. Crossed products by minimal homeomorphisms.