“…A mathematical proof [1] has shown that constrained expressions, like the one given in Equation (1), can be used to represent the whole set of functions satisfying the set of constraints they are derived for. The TFC has been mainly developed [1][2][3][4] to better solve constraint optimization problems, such as ODEs [5][6][7][8], PDEs [4,9], or programming [10,11], with effective applications in optimal control [12,13], as well as in machine learning [4,14,15]. In fact, a constrained expression restricts the whole space of functions to the subspace fully satisfying the constraints.…”