Package org.tweetyproject.math.func.fuzzy

Class LukasiewiczNorm

  • All Implemented Interfaces:
    BinaryFunction<java.lang.Double,​java.lang.Double,​java.lang.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()  

    • Method Summary

      Modifier and Type Method Description
      java.lang.Double eval​(java.lang.Double val1, java.lang.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 java.lang.Object

        equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • LukasiewiczNorm

        public LukasiewiczNorm()

    • Method Detail

      • eval

        public java.lang.Double eval​(java.lang.Double val1,
                             java.lang.Double val2)
        Description copied from interface: BinaryFunction
        Evaluates the function for the given elements.
        Specified by:
        eval in interface BinaryFunction<java.lang.Double,​java.lang.Double,​java.lang.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