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Logic Journal of IGPL 2008 16(3):293-313; doi:10.1093/jigpal/jzn008
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© The Author 2008. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Complete Axiomatisations of Properties of Finite Sets

Thomas Ågotnes

Bergen University College, Norway. E-mail: tag{at}hib.no

Michal Walicki

University of Bergen, Norway. E-mail: michal{at}ii.uib.no


   Abstract

We study a logic whose formulae are interpreted as properties of a finite set over some universe. The language is propositional, with two unary operators inclusion and extension, both taking a finite set as argument. We present a basic Hilbert-style axiomatisation, and study its completeness. The main results are syntactic and semantic characterisations of complete extensions of the logic.

Received for publication 18 August 2007. Revision received 16 April 2008.
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