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    STUDIA INFORMATICA - Issue no. 2 / 2009  
         
  Article:   DEFAULT REASONING BY ANT COLONY OPTIMIZATION.

Authors:  MIHAIELA LUPEA. 		 
       
         
  Abstract:  Drawing conclusions from incomplete information by making default assumptions represents default reasoning. Default logics, a class of nonmonotonic logical systems, formalize this type of reasoning using special inference rules, the defaults. During the inferential process, a default theory is extended with plausible conclusions (beliefs) obtaining default extensions. The very high theoretical complexity of the extension computation problem suggests the use of non-deterministic techniques for an efficient computation. In this paper we propose a uniform theoretical approach of the extension computation problem for all default logics (classical, justified, constrained, rational) applying Ant Colony Optimization metaheuristic.

Key words and phrases. default logics, nonmonotonic reasoning, ant colony optimization.
  
         
     
         
         
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