Robuta

https://scirp.org/journal/papercitationdetails?paperid=23000&JournalID=160
In this paper, a Chebyshev polynomial approximation for the solution of second-order partial differential equations with two variables and variable...
approximate solutionssecond orderpartial differentiallinearequations
https://www.arxiv.org/abs/0909.0623
Abstract page for arXiv paper 0909.0623: Any l-state approximate solutions of the Manning-Rosen potential by the Nikiforov-Uvarov method
approximate solutionsstatemanning