Variants of isotonic oscillator
同调谐振子的变形

Several variants of isotonic oscillator which can keep the structure of eigenvalue spectra are realized.These include the radial equation of the three-dimensional isotropic harmonic oscillator,the radial equation of Kepler's problem,Kepler's problem in parabola coordinates,and s state problem of Morse potential.Each variant system corresponds to a definite value of the isotonic parameter g.Thus,the isotonic oscillator problem is a quite general problem and has substantial contents.