LukasiewiczNorm

java.lang.Object

org.tweetyproject.math.func.fuzzy.TNorm

org.tweetyproject.math.func.fuzzy.LukasiewiczNorm

All Implemented Interfaces:: BinaryFunction<Double,Double,Double>

public class LukasiewiczNorm extends TNorm

Represents the Lukasiewicz-norm in fuzzy logic, i.e., T(x,y)=max(x+y-1,0)

Author:: Matthias Thimm

Constructor Summary

Constructors

Constructor

Description

LukasiewiczNorm()

Constructor
Method Summary

Modifier and Type

Method

Description

Double

eval(Double val1, Double val2)

Evaluates the function for the given elements.

Term

evalTerm(Term val1, Term val2)

Gives a representation of this norm as a mathematical term

TCoNorm

getDualCoNorm()

Returns the dual T-conorm of this T-norm.

boolean

isNilpotent()

A T-norm is nilpotent if there are x,y>0 with t(x,y)=0

Methods inherited from class org.tweetyproject.math.func.fuzzy.TNorm
eval, evalTerm

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

Constructor Details
- LukasiewiczNorm
  
  public LukasiewiczNorm()
  
  Constructor
Method Details
- eval
  
  public Double eval(Double val1, Double val2)
  
  Description copied from interface: BinaryFunction
  
  Evaluates the function for the given elements.
  
  Specified by:
  
  eval in interface BinaryFunction<Double,Double,Double>
  
  Specified by:
  
  eval in class TNorm
  
  Parameters:
  
  val1 - some element
  
  val2 - some element
  
  Returns:
  
  the value of the element.
- getDualCoNorm
  
  public TCoNorm getDualCoNorm()
  
  Description copied from class: TNorm
  
  Returns the dual T-conorm of this T-norm.
  
  Specified by:
  
  getDualCoNorm in class TNorm
  
  Returns:
  
  the dual T-conorm of this T-norm.
- evalTerm
  
  public Term evalTerm(Term val1, Term val2)
  
  Description copied from class: TNorm
  
  Gives a representation of this norm as a mathematical term
  
  Specified by:
  
  evalTerm in class TNorm
  
  Parameters:
  
  val1 - the term denoting the first parameter
  
  val2 - the term denoting the second parameter
  
  Returns:
  
  the term denoting this norm evaluation on the two terms
- isNilpotent
  
  public boolean isNilpotent()
  
  Description copied from class: TNorm
  
  A T-norm is nilpotent if there are x,y>0 with t(x,y)=0
  
  Specified by:
  
  isNilpotent in class TNorm
  
  Returns:
  
  true if the norm is nilpotent