Defining Behaviours by Quasi-finality

  • Authors:
  • Elisabete Freire;Luís Monteiro

  • Affiliations:
  • CITI, Departamento de Matemática, Universidade dos Açores, Ponta Delgada, Portugal 9501-801;CITI, Departamento de Informática, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal 2829-516

  • Venue:
  • Formal Methods: Foundations and Applications
  • Year:
  • 2009

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Abstract

This paper proposes a notion of quasi-final object for any concrete category, by relegating to the underlying category some of the requirements that final objects must satisfy in the main category. We present some very basic properties of quasi-final objects and show how known behaviours like traces and failures for transition systems, and behaviours extracted from the final sequence of an arbitrary endofunctor (here restricted to the first 驴 terms) can be described by quasi-final objects.