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Manuscript Title: PERTURB: a program for calculating vibrational energies by generalized algebraic quantization.
Authors: L.E. Fried, G.S. Ezra
Program title: PERTURB
Catalogue identifier: ABDN_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 51(1988)103
Programming language: C.
Computer: IBM 3090.
Operating system: IBM 3090, PRIME 9955, GOULD 9050, IBM PC.
RAM: 350K words
Word size: 8
Keywords: Molecular, Vibrations, Generalized algebraic Quantization, Semiclassical Quantization, Perturbation theory.
Classification: 16.3.

Nature of problem:
PERTURB calculates energy eigenvalues for a set of coupled harmonic oscillators.

Solution method:
Generalized Algebraic Quantization, a perturbative technique allowing expansions in h.

Restrictions:
There is no pre-set limit on the size of the problem, although the computer time required increases rapidly with the number of degrees of freedom.