2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/52085The symplectic projector method is applied to derive the local physical degrees of freedom of a particle moving freely on an arbitrary surface. The dependence of the projector on the coordinates and momenta of the particle is discussed.Corrections to the formula (44) and modifications of the conclusions in the last section. 9 pages, LATeXHigh Energy Physics - Theorytext