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 |  | Palle E. T. Jorgensen, Daniel Markiewicz, and Paul S. Muhly |  |  | Tributes to Bill Arveson | 1 |  |  |  | 
 |  | Kenneth Davidson, Adam Fuller, and Evgenios Kakariadis |  |  | Semicrossed products of operator algebras: a survey | 56 |  |  |  | 
 |  | Ruy Exel |  |  | Interactions and dynamical systems of type (n,m) - a case study | 87 |  |  |  | 
 |  | Douglas Farenick, Ali S. Kavruk, Vern I. Paulsen, and Ivan G. Todorov |  |  | Characterizations of the weak expectation property | 107 |  |  |  | 
 |  | Erin Griesenauer, Paul S. Muhly, and Baruch Solel |  |  | Boundaries, bundles, and trace algebras | 136 |  |  |  | 
 |  | Frédéric Latrémoliére and Judith Packer |  |  | Noncommutative Solenoids | 155 |  |  |  |  |