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    STUDIA INFORMATICA - Issue no. Sp.Issue%202 / 2009  
         
  Article:   SKEPTICAL REASONING IN CONSTRAINED DEFAULT LOGIC USING SEQUENT CALCULUS.

Authors:  MIHAIELA LUPEA. 		 
       
         
  Abstract:  Constrained default logic is a version of Reiter’s classical default logic satisfying desirable formal properties as supraclassicality, semi-monotonicity, commitment to assumptions. In this paper we propose an axiomatic system called skeptical constrained default sequent calculus, based on sequent and anti-sequent calculi from classical logics. This system is used to formalize and study from theoretical point of view the skeptical nonmonotonic reasoning process modelled by constrained default logic.

Key words and phrases. constrained default logic, skeptical default inference, sequent and antisequent calculi. 		 
         
     
         
         
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