Galetti, D.; Pimentel, B.M.; Lima, C.L.; Kyotoku, M. - In: Physica A: Statistical Mechanics and its Applications 262 (1999) 3, pp. 428-440
Group theoretical-based techniques and fundamental results from number theory are used in order to allow for the construction of exact projectors in finite-dimensional spaces. These operators are shown to make use only of discrete variables, which play the role of discrete generator coordinates,...