Solve Partial Differential Equations using the Banach Contraction Method and Improve Results Using the Trapezoidal Rule. RJCSM [Internet]. 2021 Jun. 10 [cited 2026 Jun. 25];15(1):79-85. Available from: https://csmj.uomosul.edu.iq/index.php/csmj/article/view/36502