Departamento de Fisica Teorica,
Facultad de Ciencias,
Universidad de Zaragoza,
Zaragoza 50009,

Generalized oscillators, isochronous systems and equispaced spectra

We discuss several generalizations of the harmonic oscillator each one preserving some specific characteristics of the harmonic oscillator, either superintegrability and Hamilton-Jacobi separability, or isochronicity or equispacing of spectra in the classical and quantum approaches.

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