Epistemic entrenchment-based multiple contractions

• Autor(a) principal: Fermé, Eduardo
• Data de Publicação: 2013
• Outros Autores: Reis, Maurício D. L.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.13/3446
• topic: Multiple contraction functions; Epistemic entrenchment-based multiple contractions; Epistemic entrenchment-based contractions; System of spheres-based multiple contractions; .; Faculdade de Ciências Exatas e da Engenharia

In this article we present a new class of multiple contraction functions—the epistemic entrenchment-based multiple contractions—which are a generalization of the epistemic entrenchment-based contractions (Gardenfors, 1988; G ¨ ardenfors & Makinson, 1988) to the case of ¨ contractions by (possibly nonsingleton) sets of sentences and provide an axiomatic characterization for that class of functions. Moreover, we show that the class of epistemic entrenchment-based multi ple contractions coincides with the class of system of spheres-based multiple contractions introduced in Ferme & Reis (2012).