PmInconsistencyMeasure

java.lang.Object
- net.sf.tweety.logics.commons.analysis.BeliefSetInconsistencyMeasure<PlFormula>
- - net.sf.tweety.logics.pl.analysis.PmInconsistencyMeasure

All Implemented Interfaces:

PostulateEvaluatable<PlFormula>, InconsistencyMeasure<BeliefSet<PlFormula,?>>
```
public class PmInconsistencyMeasure
extends BeliefSetInconsistencyMeasure<PlFormula>
```
This class implements the inconsistency measure I_{P_m} proposed in [Jabbour, Raddaoui. Measuring Inconsistency Through Minimal Proofs. ECSQARU 2013]. The implementation here follows the characterization of I_{P_m} using Proposition 9 in the above paper. There, I_{P_m} (K)= \sum_{x\in Var(K)}|Pm(x)|*|Pm(-x)| where Pm(x) is the set of all (not necessarily consistent) minimal proofs of x in K that mention x.

Author:

Matthias Thimm

Field Summary
- Fields inherited from interface net.sf.tweety.logics.commons.analysis.InconsistencyMeasure
  MEASURE_TOLERANCE

Constructor Summary

Constructors
Constructor Description

PmInconsistencyMeasure()

Method Summary

Modifier and Type	Method	Description
`private int`	`getNumOfMinmalProofs(PlFormula f, java.util.Collection<PlFormula> formulas)`	Returns the number of minimal proofs of f in formulas.
`java.lang.Double`	`inconsistencyMeasure(java.util.Collection<PlFormula> formulas)`	This method measures the inconsistency of the given set of formulas.

Methods inherited from class net.sf.tweety.logics.commons.analysis.BeliefSetInconsistencyMeasure
inconsistencyMeasure

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PmInconsistencyMeasure
```
public PmInconsistencyMeasure()
```
- Method Detail
  - inconsistencyMeasure
```
public java.lang.Double inconsistencyMeasure(java.util.Collection<PlFormula> formulas)
```
    Description copied from class: BeliefSetInconsistencyMeasure
    
    This method measures the inconsistency of the given set of formulas.
    
    Specified by:
    
    inconsistencyMeasure in class BeliefSetInconsistencyMeasure<PlFormula>
    
    Parameters:
    
    formulas - a collection of formulas.
    
    Returns:
    
    a Double indicating the degree of inconsistency.
  - getNumOfMinmalProofs
```
private int getNumOfMinmalProofs(PlFormula f,
                                 java.util.Collection<PlFormula> formulas)
```
    Returns the number of minimal proofs of f in formulas.
    
    Parameters:
    
    f - some formula (either a proposition or the negation of a proposition)
    
    formulas - a set of formulas (the knowledge base)
    
    Returns:
    
    the number of minimal proofs of f in formulas.