Numerical method for solving the Dirichlet boundary value problem for nonlinear triharmonic equation

In this work, we consider the Dirichlet boundary value problem for nonlinear triharmonic equation. Due to the reduction of the nonlinear boundary value problem to operator equation for the nonlinear term and the unknown second normal derivative we design an iterative method at both continuous and discrete level for numerical solution of the problem. Some examples demonstrate that the numerical method is of fourth order convergence.Comment: 14 pages, 1 figure. arXiv admin note: substantial text overlap with arXiv:2004.0032