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/*
fuzzylite (R), a fuzzy logic control library in C++.
Copyright (C) 2010-2017 FuzzyLite Limited. All rights reserved.
Author: Juan Rada-Vilela, Ph.D. <jcrada@fuzzylite.com>
This file is part of fuzzylite.
fuzzylite is free software: you can redistribute it and/or modify it under
the terms of the FuzzyLite License included with the software.
You should have received a copy of the FuzzyLite License along with
fuzzylite. If not, see <http://www.fuzzylite.com/license/>.
fuzzylite is a registered trademark of FuzzyLite Limited.
*/
#ifndef FL_EINSTEINSUM_H
#define FL_EINSTEINSUM_H
#include "fl/norm/SNorm.h"
namespace fl {
/**
The EinsteinSum class is an SNorm that computes the einstein sum of any
two values.
@author Juan Rada-Vilela, Ph.D.
@see EinsteinProduct
@see SNorm
@see SNormFactory
@see Norm
@since 4.0
*/
class FL_API EinsteinSum FL_IFINAL : public SNorm {
public:
std::string className() const FL_IOVERRIDE;
Complexity complexity() const FL_IOVERRIDE;
/**
Computes the Einstein sum of two membership function values
@param a is a membership function value
@param b is a membership function value
@return @f$a+b/(1+a \times b)@f$
*/
scalar compute(scalar a, scalar b) const FL_IOVERRIDE;
EinsteinSum* clone() const FL_IOVERRIDE;
static SNorm* constructor();
};
}
#endif /* FL_EINSTEINSUM_H */
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