06038148

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06038148 Reis, Maur{\'\i}cio D.L. Ferm\'e, Eduardo Possible worlds semantics for partial meet multiple contraction. J. Philos. Log. 41, No. 1, 7-28 (2012). 2012 Springer, Dordrecht EN belief change theory contraction multiple contraction possible worlds semantics

doi:10.1007/s10992-011-9198-y

Summary: In the logic of theory change, the standard model is AGM, proposed by {\it C. E. Alchourr\'on}, {\it P. G\"ardenfors} and {\it D. Makinson} [J. Symb. Log. 50, 510--530 (1985; Zbl 0578.03011)]. This paper focuses on an extension of AGM that accounts for contractions of a theory by a set of sentences instead of only by a single sentence. {\it S. O. Hansson} [Theoria 55, No. 2, 114--132 (1989; Zbl 0722.03028)] and {\it A. Fuhrmann} and {\it S. O. Hansson} [J. Logic Lang. Inf. 3, No. 1, 39--75 (1994; Zbl 0791.03014)] generalized partial meet contraction to the case of contractions by (possibly non-singleton) sets of sentences. In this paper we present the possible worlds semantics for partial meet multiple contractions.