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diff --git a/fuzzylite/src/term/Activated.cpp b/fuzzylite/src/term/Activated.cpp
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+++ b/fuzzylite/src/term/Activated.cpp
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+/*
+ Author: Juan Rada-Vilela, Ph.D.
+ Copyright (C) 2010-2014 FuzzyLite Limited
+ All rights reserved
+
+ This file is part of fuzzylite.
+
+ fuzzylite is free software: you can redistribute it and/or modify it under
+ the terms of the GNU Lesser General Public License as published by the Free
+ Software Foundation, either version 3 of the License, or (at your option)
+ any later version.
+
+ fuzzylite is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+ for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with fuzzylite.  If not, see <http://www.gnu.org/licenses/>.
+
+ fuzzylite™ is a trademark of FuzzyLite Limited.
+
+ */
+
+#include "fl/term/Activated.h"
+
+#include "fl/imex/FllExporter.h"
+#include "fl/norm/TNorm.h"
+
+namespace fl {
+
+    Activated::Activated(const Term* term, scalar degree, const TNorm* activation)
+    : Term(""), _term(term), _degree(degree), _activation(activation) {
+        if (term) this->_name = term->getName();
+    }
+
+    Activated::~Activated() {
+    }
+
+    std::string Activated::className() const {
+        return "Activated";
+    }
+
+    scalar Activated::membership(scalar x) const {
+        if (fl::Op::isNaN(x)) return fl::nan;
+        if (not _activation) throw fl::Exception("[activation error] "
+                "activation operator needed to activate " + _term->toString(), FL_AT);
+        return _activation->compute(this->_term->membership(x), _degree);
+    }
+
+    std::string Activated::parameters() const {
+        FllExporter exporter;
+        std::ostringstream ss;
+        ss << Op::str(_degree) << " " << exporter.toString(_activation) << " "
+                << exporter.toString(_term);
+        return ss.str();
+    }
+
+    void Activated::configure(const std::string& parameters) {
+        (void) parameters;
+    }
+
+    std::string Activated::toString() const {
+        FllExporter exporter;
+        std::ostringstream ss;
+        ss << exporter.toString(_activation) << "("
+                << Op::str(_degree) << ","
+                << _term->getName() << ")";
+        return ss.str();
+    }
+
+    void Activated::setTerm(const Term* term) {
+        this->_term = term;
+    }
+
+    const Term* Activated::getTerm() const {
+        return this->_term;
+    }
+
+    void Activated::setDegree(scalar degree) {
+        this->_degree = degree;
+    }
+
+    scalar Activated::getDegree() const {
+        return this->_degree;
+    }
+
+    void Activated::setActivation(const TNorm* activation) {
+        this->_activation = activation;
+    }
+
+    const TNorm* Activated::getActivation() const {
+        return this->_activation;
+    }
+
+    Activated* Activated::clone() const {
+        return new Activated(*this);
+    }
+
+}