Pairs of points : antigonal, isogonal, and inverse

J. IJzeren, van

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    Final coalgebras capture system behaviours such as streams, infinite trees and processes. Algebraic operations on a final coalgebra can be defined by distributive laws (of a syntax functor S over a behaviour functor F). Such distributive laws correspond to abstract specification formats. One such format is a generalisation of the GSOS rules known from structural operational semantics of processes. We show that given an abstract GSOS specification ¿ that defines operations s on a final F-coalgebra, we can systematically construct a GSOS specification ¿ that defines the pointwise extension s of s on a final FA-coalgebra. The construction relies on the addition of a family of auxiliary ‘buffer’ operations to the syntax. These buffer operations depend only on A, so the construction is uniform for all s and F.
    Original languageEnglish
    Pages (from-to)339-347
    Number of pages41
    JournalMathematics Magazine
    Issue number5
    Publication statusPublished - 1992


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