Method for validation of coins.

A METHOD FOR CONTROLLING THE COINS INCLUDING AT LEAST MAKE TWO MEASURES OF AN UNKNOWN CURRENCY: AND ACCEPT THIS CURRENCY DESCONOCIDA as corresponding to a first type of coin, if POINT DEFINED MEASURES IS LOCATED IN THE AREA DEFINED BY THE AXES MEASURES, on a first side of a discriminant surface in which the Mahalanobis distances CENTERS OF DISTRIBUTION said first currency and a second currency have a predetermined relationship, characterized in that said rELATIONSHIP MATCHING (at least approximately) WITH EQUAL AMOUNTS OF RELATIVE DISTANCES MAHALANOBISRIS WITH CONSTANT respective predetermined at least one of which is nonzero.