“…This article has a mathematical character but we will use a formalism familiar to physicists. Our strategy will be the following: i) we introduce a Dirac constraint of intrinsic periodicity, first in Lagrangian form and then in Hamiltonian form [18,19], which projects ordinary Hamiltonian dynamics (non compact manifold) into related intrinsically cyclic dynamics (compact manifold); ii) we prove, by using theorems of Geometric Quantization (GQ) [1, [20][21][22][23][24], that the resulting intrinsically cyclic dynamics naturally satisfies Dirac's rules of canonical quantization -without postulating them. In short, the canonical quantization is equivalent to a local transformation from ordinary non-compact manifolds into corresponding intrinsically compact manifolds, see also [25,26].…”