Nonstationary monotone iterative methods for nonlinear partial differential equations

Authors:
Ren-Chuen Chen;Jinn-Liang Liu
Affiliations:
Department of Mathematics, National Kaohsiung Normal University, Kaohsiung, Taiwan;Department of Applied Mathematics, National Hsinchu University of Education, Hsinchu City, Taiwan
Venue:
Journal of Computational and Applied Mathematics
Year:
2009

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Abstract

A simple technique is given in this paper for the construction and analysis of monotone iterative methods for a class of nonlinear partial differential equations. With the help of the special nonlinear property we can construct nonstationary parameters which can speed up the iterative process in solving the nonlinear system. Picard, Gauss-Seidel, and Jacobi monotone iterative methods are presented and analyzed for the adaptive solutions. The adaptive meshes are generated by the 1-irregular mesh refinement scheme which together with the M-matrix of the finite element stiffness matrix lead to existence-uniqueness-comparison theorems with simple upper and lower solutions as initial iterates. Some numerical examples, including a test problem with known analytical solution, are presented to demonstrate the accuracy and efficiency of the adaptive and monotone properties. Numerical results of simulations on a MOSFET with the gate length down to 34 nm are also given.