Abstract
In this article, we obtain the adjoint difference equation for the Nikiforov–Uvarov–Suslov difference equation of hypergeometric type on non-uniform lattices, and prove it to be a difference equation of hypergeometric type on non-uniform lattices as well. The particular solutions of the adjoint difference equation are then obtained. As an application of these particular solutions, we use them to obtain the particular solutions for the original difference equation of hypergeometric type on non-uniform lattices. In addition, we give another kind of fundamental theorems for the Nikiforov–Uvarov–Suslov difference equation of hypergeometric type, which are essentially new results and their expressions are different from the Suslov Theorem. Finally, we give an example to illustrate the application of the new fundamental theorems.
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The first author was supported by the Fundamental Research Funds for the Central Universities of China, Grant Number 20720150006, and Natural Science Foundation of Fujian province of China, Grant Number 2016J01032.
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Cheng, J., Dai, W. Adjoint difference equation for the Nikiforov–Uvarov–Suslov difference equation of hypergeometric type on non-uniform lattices. Ramanujan J 53, 285–318 (2020). https://doi.org/10.1007/s11139-020-00298-3
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DOI: https://doi.org/10.1007/s11139-020-00298-3
Keywords
- Special function
- Orthogonal polynomials
- Adjoint equation
- Difference equation of hypergeometric type
- Non-uniform lattice