2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/90657The eigenvalue problem in quantum mechanics is reduced to quantization of the classical action of the physical system. State function of the system, $ψ_0(ϕ)$, is written in the form of superposition of two plane waves in the phase space. Quantization condition is derived from the basic requirements of continuity and finiteness for $ψ_0(ϕ)$ in the whole region.7 pagesQuantum PhysicsQuantization of the classical action and eigenvalue problemtext