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Using standard perturbation theory, simple new double and triple summation expressions are obtained.

- Harry A. Mavromatis, Rajai S. Alassar
- Appl. Math. Lett.
- 2001

- Hari M. Srivastava, Harry A. Mavromatis, Rajai S. Alassar
- Appl. Math. Lett.
- 2003

Motivated essentially by their possible need in a fairly large number of physical and chemical contexts, Mavromatis and Alsssar [l] derived several associated Laguerre integral results by eliminating au unnecessary constraint used in an earlier paper on the subject by Mavromatis [2]. The main object of the present sequel to these recent works is to… (More)

A generalized RPA formalism is presented which treats pp and ph correlations on an equal footing. The effect of these correlations on the single-particle Green function is discussed and it is demonstrated that a self-consistent treatment of the single-particle Green function is required to obtain stable solutions. A simple approximation scheme is presented… (More)

It is proved that quasi-exactly soluble potentials (QESPs) corresponding to an oscillator with harmonic, quartic and sextic terms, for which the n+ 1 lowest levels of a given parity can be determined exactly, may be approximated by WKB equivalent potentials corresponding to deformed anharmonic oscillators of SUq(1,1) symmetry, which have been used for the… (More)

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