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## “School of Physics”

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Paper   IPM / P / 8398
School of Physics
Title:   Ladder Operators and Recursion Relations for the Associated Bessel Polynomials
Author(s):
 1 F. Fakhri 2 A. Chenaghlou
Status:   Published
Journal: Phys. Lett. A
Vol.:  358
Year:  2006
Pages:   345-353
Supported by:  IPM
Abstract:
Introducing the associated Bessel polynomials in terms of two non-negative integers, and under an integrability condition we simultaneously factorize their corresponding differential equation into a product of the ladder operators by four different ways as shape invariance symmetry equations. This procedure gives four different pairs of recursion relations on the associated Bessel polynomials. In spite of description of Bessel and Laguerre polynomials in terms of each other, we show that the associated Bessel differential equation is factorized in four different ways whereas for Laguerre one we have three different ways.