Finding Multiple Solutions to Elliptic PDE with Nonlinear Boundary Conditions Academic Article uri icon


  • In this paper, in order to solve an elliptic partial differential equation with a nonlinear boundary condition for multiple solutions, the authors combine a minimax approach with a boundary integral-boundary element method, and identify a subspace and its special expression so that all numerical computation and analysis can be carried out more efficiently based on information of functions only on the boundary. Some mathematical justification of the new approach is established. An efficient and reliable local minimax-boundary element method is developed to numerically search for solutions. Details on implementation of the algorithm are also addressed. The existence and multiplicity of solutions to the problem are established under certain regular assumptions. Some conditions related to convergence of the algorithm and instability of solutions found by the algorithm are verified. To illustrated the method, numerical multiple solutions to some examples on domains with different geometry are displayed with their profile and contour plots. 2013 Springer Science+Business Media New York.

published proceedings

  • Journal of Scientific Computing

author list (cited authors)

  • Le, A. n., Wang, Z., & Zhou, J.

citation count

  • 3

complete list of authors

  • Le, An||Wang, Zhi-Qiang||Zhou, Jianxin

publication date

  • September 2013