@article{rosa_cabrel_2025,  title={Numerical solution of Laplace’s equation in polar coordinates by a Fourier expansion and the finite difference scheme},  volume={47},  ISSN={1806-1117},  url={https://doi.org/10.1590/1806-9126-RBEF-2025-0222},  DOI={10.1590/1806-9126-RBEF-2025-0222},  journal={Revista Brasileira de Ensino de Física},  publisher={Sociedade Brasileira de Física - SBF},  author={Rosa, Jaime J.P. Carreño La and Cabrel, Alejandro D. Paredes},  year={2025},  pages={e20250222} }