A graphical foundation for schedules

Guy McCusker, John Power, Cai Wingfield

Research output: Contribution to journalArticlepeer-review

41 Citations (SciVal)
127 Downloads (Pure)


In 2007, Harmer, Hyland and Melli`s gave a formal mathematical foundation for game semantics using a notion they called a schedule. Their definition was combinatorial in nature, but researchers often draw pictures when describing schedules in practice. Moreover, a proof that the composition of schedules is associative involves cumbersome combinatorial detail, whereas in terms of pictures the proof is straightforward, reflecting the geometry of the plane. Here, we give a geometric formulation of schedule, prove that it is equivalent to Harmer et al.’s definition, and illustrate its value by giving a proof of associativity of composition.
Original languageEnglish
Pages (from-to)273-289
Number of pages16
JournalElectronic Notes in Theoretical Computer Science
Publication statusPublished - 24 Sept 2012


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