Package net.sf.tweety.logics.cl.reasoner
Class CReasoner
- java.lang.Object
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- net.sf.tweety.logics.cl.reasoner.AbstractConditionalLogicReasoner
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- net.sf.tweety.logics.cl.reasoner.CReasoner
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- All Implemented Interfaces:
ModelProvider<Conditional,ClBeliefSet,RankingFunction>
,QualitativeReasoner<ClBeliefSet,PlFormula>
,Reasoner<java.lang.Boolean,ClBeliefSet,PlFormula>
public class CReasoner extends AbstractConditionalLogicReasoner
This class models a c-reasoner for conditional logic. Reasoning is performed by computing a minimal c-representation for the given knowledge base.
A c-representation for a conditional knowledge base R={r1,...,rn} is a ranking function k such that k accepts every conditional in R (k |= R) and if there are numbers k0,k1+,k1-,...,kn+,kn- with
k(w)=k0 + \sum_{w verifies ri} ki+ + \sum_{w falsifies ri} kj- for every w. A c-representation is minimal if k0+...+kn- is minimal. This reasoner uses mathematical optimization for solving the above problem and is usually faster than the brute force approach.
See Gabriele Kern-Isberner. Conditionals in nonmonotonic reasoning and belief revision. Lecture Notes in Computer Science, Volume 2087. 2001.- Author:
- Matthias Thimm
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Constructor Summary
Constructors Constructor Description CReasoner()
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Method Summary
Modifier and Type Method Description RankingFunction
getModel(ClBeliefSet kb)
Returns a single (dedicated) model of the given belief base.-
Methods inherited from class net.sf.tweety.logics.cl.reasoner.AbstractConditionalLogicReasoner
getModels, query
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Method Detail
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getModel
public RankingFunction getModel(ClBeliefSet kb)
Description copied from interface:ModelProvider
Returns a single (dedicated) model of the given belief base. If the implemented method allows for more than one dedicated model, the selection may be non-deterministic.- Specified by:
getModel
in interfaceModelProvider<Conditional,ClBeliefSet,RankingFunction>
- Specified by:
getModel
in classAbstractConditionalLogicReasoner
- Parameters:
kb
- some belief base- Returns:
- a selected model of the belief base.
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