A graphical foundation for interleaving in game semantics

McCusker, Guy and Power, John and Wingfield, Cai (2015) A graphical foundation for interleaving in game semantics. Journal of Pure and Applied Algebra, 219 (4). pp. 1131-1174. ISSN 0022-4049

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Abstract

In 2007, Harmer, Hyland and Melliès gave a formal mathematical foundation for game semantics using a notion they called a {multimap}-schedule, and the similar notion of ⊗-schedule, both structures describing interleavings of plays in games. Their definition was combinatorial in nature, but researchers often draw pictures when describing schedules in practice. Moreover, several proofs of key properties, such as that the composition of {multimap}-schedules is associative, involve 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 {multimap}-schedules and ⊗-schedules, prove that they are isomorphic to Harmer et al.'s definitions, and illustrate their value by giving such geometric proofs. Harmer et al.'s notions may be combined to describe plays in multi-component games, and researchers have similarly developed intuitive graphical representations of plays in these games. We give a characterisation of these diagrams and explicitly describe how they relate to the underlying schedules, finally using this relation to provide new, intuitive proofs of key categorical properties.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Pure and Applied Algebra
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2600/2602
Subjects:
ID Code:
86643
Deposited By:
Deposited On:
09 Jun 2017 09:04
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 10:21