Affiliation: | aSchool of Computing Science, Simon Fraser University, Vancouver, BC, Canada;bDepartment of Computer Science, Florida State University, Tallahassee, Florida, USA;cSchool of Computer Science, Carleton University, 1125 Colonel By Drive, K1S 5B6 Ottawa, Ontario, Canada;dInstitut für Mathematik, Technische Universität Berlin, Berlin, Germany |