/usr/include/trilinos/ROL_PositiveFunction.hpp is in libtrilinos-rol-dev 12.10.1-3.
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// ************************************************************************
//
// Rapid Optimization Library (ROL) Package
// Copyright (2014) Sandia Corporation
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#ifndef ROL_POSITIVEFUNCTION_HPP
#define ROL_POSITIVEFUNCTION_HPP
namespace ROL {
template<class Real>
class PositiveFunction {
public:
virtual ~PositiveFunction() {}
virtual Real evaluate(Real input, int deriv) = 0;
};
}
#endif
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