Comments on “A closed-form optimal control for linear systems with equal state and input delays” [Automatica 41 (2005), 915–920]

A method for solving the optimal control problems in linear systems with equal state and input delays has been recently presented by Basin and R-Gonzalez (2005, Automatica, 41, 915–920). In this note, based on a counterexample, it is shown that the method does not find the optimal solution.