The theory of extremum estimators does not specify what the objective function should be. The general theory of extremum estimators was developed by . A stationary point of inflection is not a local extremum. As the only feasible solution, this point is obviously a constrained extremum. The southern coast of Mindoro forms the northeastern extremum of the Sulu Sea. Since it is a point of inflection, it is not a local extremum. Some of these parameters require the measurement of the exact position of the extremum. It is an exercise for the reader that this extremum is indeed a maximum. With real data, EM also is subject to the usual local extremum traps. Thus a strong extremum is also a weak extremum, but the converse may not hold. Giacomo Carissimi, "Extremum Dei Judicium," for 3 chorus, 2 violins and organ. The function "f" has a local extremum at the origin in this case.